<SEC-DOCUMENT>0001447362-21-000075.txt : 20210409
<SEC-HEADER>0001447362-21-000075.hdr.sgml : 20210409
<ACCEPTANCE-DATETIME>20210409171348
ACCESSION NUMBER:		0001447362-21-000075
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		14
CONFORMED PERIOD OF REPORT:	20210406
ITEM INFORMATION:		Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
FILED AS OF DATE:		20210409
DATE AS OF CHANGE:		20210409

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CASTLE BIOSCIENCES INC
		CENTRAL INDEX KEY:			0001447362
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-MEDICAL LABORATORIES [8071]
		IRS NUMBER:				770701774
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38984
		FILM NUMBER:		21818534

	BUSINESS ADDRESS:	
		STREET 1:		505 S FRIENDSWOOD DRIVE
		STREET 2:		SUITE 401
		CITY:			FRIENDSWOOD
		STATE:			TX
		ZIP:			77546
		BUSINESS PHONE:		866-788-9007

	MAIL ADDRESS:	
		STREET 1:		505 S FRIENDSWOOD DRIVE
		STREET 2:		SUITE 401
		CITY:			FRIENDSWOOD
		STATE:			TX
		ZIP:			77546
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>cstl-20210406.htm
<DESCRIPTION>8-K
<TEXT>
<XBRL>
<?xml version="1.0" ?><!--XBRL Document Created with Wdesk from Workiva--><!--Copyright 2021 Workiva--><!--r:90c79493-b842-40b7-866e-d720baa13dd6,g:ba860d66-89a3-4263-87d1-cf28d44fa600,d:9c8b7aef72334c23b3493cd3b5cf5c42--><html xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ix="http://www.xbrl.org/2013/inlineXBRL" xmlns:ixt="http://www.xbrl.org/inlineXBRL/transformation/2015-02-26" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns="http://www.w3.org/1999/xhtml" xmlns:ixt-sec="http://www.sec.gov/inlineXBRL/transformation/2015-08-31" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns:dei="http://xbrl.sec.gov/dei/2019-01-31" xmlns:xlink="http://www.w3.org/1999/xlink" xml:lang="en-US"><head><meta http-equiv="Content-Type" content="text/html"/>


<title>cstl-20210406</title></head><body><div style="display:none"><ix:header><ix:hidden><ix:nonNumeric contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406" name="dei:EntityCentralIndexKey" id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml80L2ZyYWc6ZDQyZGYzOGQwYjNhNGViM2JjZjRmOTMyOTVmMzMzNDUvdGFibGU6OGQwYzViMTUxYjM4NDhkMmJkZjc5ZGUwNWQ4MTA5NjYvdGFibGVyYW5nZTo4ZDBjNWIxNTFiMzg0OGQyYmRmNzlkZTA1ZDgxMDk2Nl8wLTEtMS0xLTA_2c80326d-7d93-4ea8-92aa-1311cc0a7f70">0001447362</ix:nonNumeric><ix:nonNumeric contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406" format="ixt:booleanfalse" name="dei:AmendmentFlag" id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml80L2ZyYWc6ZDQyZGYzOGQwYjNhNGViM2JjZjRmOTMyOTVmMzMzNDUvdGFibGU6OGQwYzViMTUxYjM4NDhkMmJkZjc5ZGUwNWQ4MTA5NjYvdGFibGVyYW5nZTo4ZDBjNWIxNTFiMzg0OGQyYmRmNzlkZTA1ZDgxMDk2Nl8xLTEtMS0xLTA_57e3685f-a1e2-4843-805e-a91f1c7e5b36">FALSE</ix:nonNumeric></ix:hidden><ix:references xml:lang="en-US"><link:schemaRef xlink:type="simple" xlink:href="cstl-20210406.xsd"></link:schemaRef></ix:references><ix:resources><xbrli:context id="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406"><xbrli:entity><xbrli:identifier scheme="http://www.sec.gov/CIK">0001447362</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2021-04-06</xbrli:startDate><xbrli:endDate>2021-04-06</xbrli:endDate></xbrli:period></xbrli:context><xbrli:context id="i67f431c3812b4fc68768ea330cd1555e_D20210406-20210406"><xbrli:entity><xbrli:identifier scheme="http://www.sec.gov/CIK">0001447362</xbrli:identifier><xbrli:segment><xbrldi:explicitMember dimension="dei:EntityAddressesAddressTypeAxis">dei:FormerAddressMember</xbrldi:explicitMember></xbrli:segment></xbrli:entity><xbrli:period><xbrli:startDate>2021-04-06</xbrli:startDate><xbrli:endDate>2021-04-06</xbrli:endDate></xbrli:period></xbrli:context></ix:resources></ix:header></div><div id="i9c8b7aef72334c23b3493cd3b5cf5c42_1"></div><div style="min-height:42.75pt;width:100%"><div><span><br/></span></div></div><div style="-sec-extract:summary;text-align:center"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.853%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:3pt"><td colspan="3" style="border-top:3pt double #000000;padding:0 1pt"></td></tr></table></div><div style="margin-top:6pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:14pt;font-weight:700;line-height:120%">UNITED STATES</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:14pt;font-weight:700;line-height:120%">SECURITIES AND EXCHANGE COMMISSION</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:14pt;font-weight:700;line-height:120%">Washington, D.C. 20549</span></div><div><span><br/></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:14pt;font-weight:700;line-height:120%">FORM <ix:nonNumeric contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406" name="dei:DocumentType" id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8zMzM5_60a56e37-8ee1-48db-b488-d84091a7d081">8-K</ix:nonNumeric></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:120%">CURRENT REPORT</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:120%">Pursuant to Section 13 or 15(d)</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:120%">of the Securities Exchange Act of 1934</span></div><div style="text-align:center"><span><br/></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Date of Report (Date of earliest event reported): <ix:nonNumeric contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406" format="ixt:datemonthdayyearen" name="dei:DocumentPeriodEndDate" id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8yMjc_09f87ccc-92f1-473c-a4bd-5ffac94f87f1">April 6, 2021</ix:nonNumeric></span></div><div style="text-align:center"><span><br/></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:18pt;font-weight:700;line-height:120%"><ix:nonNumeric contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406" name="dei:EntityRegistrantName" id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8zMzM2_fef091e2-2bdf-4ed0-a536-c0927b4664fb">Castle Biosciences, Inc.</ix:nonNumeric></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">(Exact name of registrant as specified in its charter)&#160;</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.853%"><tr><td style="width:1.0%"></td><td style="width:22.911%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:15.151%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:18.812%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:18.812%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:18.814%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#160;</span></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#160;</span></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#160;</span></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#160;</span></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#160;</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%"><ix:nonNumeric contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406" format="ixt-sec:stateprovnameen" name="dei:EntityIncorporationStateCountryCode" id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGFibGU6YjM0NDk0MDI5ODViNGEzODgyNmViNjgwOWUwNzRhYmMvdGFibGVyYW5nZTpiMzQ0OTQwMjk4NWI0YTM4ODI2ZWI2ODA5ZTA3NGFiY18xLTAtMS0xLTA_6f549b47-c71e-4241-bcc1-4fd65968a747">Delaware</ix:nonNumeric></span></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#160;</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%"><ix:nonNumeric contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406" name="dei:EntityFileNumber" id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGFibGU6YjM0NDk0MDI5ODViNGEzODgyNmViNjgwOWUwNzRhYmMvdGFibGVyYW5nZTpiMzQ0OTQwMjk4NWI0YTM4ODI2ZWI2ODA5ZTA3NGFiY18xLTItMS0xLTA_4bd8264d-1e40-470e-8509-defa9dc5838b">001-38984</ix:nonNumeric></span></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#160;</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%"><ix:nonNumeric contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406" name="dei:EntityTaxIdentificationNumber" id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGFibGU6YjM0NDk0MDI5ODViNGEzODgyNmViNjgwOWUwNzRhYmMvdGFibGVyYW5nZTpiMzQ0OTQwMjk4NWI0YTM4ODI2ZWI2ODA5ZTA3NGFiY18xLTQtMS0xLTA_47e14228-a909-42a2-8c49-ec67094ea3cd">77-0701774</ix:nonNumeric></span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(state or other jurisdiction<br/>of incorporation)</span></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">&#160;</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(Commission<br/>File Number)</span></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">&#160;</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(I.R.S. Employer<br/>Identification No.)</span></td></tr></table></div><div style="text-align:center"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.707%"><tr><td style="width:1.0%"></td><td style="width:10.190%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:18.401%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:18.401%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:28.665%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:18.843%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="6" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%"><ix:nonNumeric contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406" name="dei:EntityAddressAddressLine1" id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGFibGU6ZGI5MzA2YmRjOGQ4NDE3MWI0ZDUwMzFkNDIzNzg3YzkvdGFibGVyYW5nZTpkYjkzMDZiZGM4ZDg0MTcxYjRkNTAzMWQ0MjM3ODdjOV8wLTEtMS0xLTAvdGV4dHJlZ2lvbjo1YzIyODIyZTgyNWM0MWZiYjMxNTU1YzYzZWNjMjllN180_0caccf86-ddd9-42cb-9f95-6e49223f3b56">505 S. Friendswood Drive</ix:nonNumeric>, <ix:nonNumeric contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406" name="dei:EntityAddressAddressLine2" id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGFibGU6ZGI5MzA2YmRjOGQ4NDE3MWI0ZDUwMzFkNDIzNzg3YzkvdGFibGVyYW5nZTpkYjkzMDZiZGM4ZDg0MTcxYjRkNTAzMWQ0MjM3ODdjOV8wLTEtMS0xLTAvdGV4dHJlZ2lvbjo1YzIyODIyZTgyNWM0MWZiYjMxNTU1YzYzZWNjMjllN184_f9cc1b3c-34b5-42f0-abe8-2f8fad764a9c">Suite 401</ix:nonNumeric></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%"><ix:nonNumeric contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406" name="dei:EntityAddressCityOrTown" id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGFibGU6ZGI5MzA2YmRjOGQ4NDE3MWI0ZDUwMzFkNDIzNzg3YzkvdGFibGVyYW5nZTpkYjkzMDZiZGM4ZDg0MTcxYjRkNTAzMWQ0MjM3ODdjOV8wLTEtMS0xLTAvdGV4dHJlZ2lvbjo1YzIyODIyZTgyNWM0MWZiYjMxNTU1YzYzZWNjMjllN18xMQ_af092b16-a1a8-4f80-8494-d3ca5196b816">Friendswood</ix:nonNumeric>, <ix:nonNumeric contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406" format="ixt-sec:stateprovnameen" name="dei:EntityAddressStateOrProvince" id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGFibGU6ZGI5MzA2YmRjOGQ4NDE3MWI0ZDUwMzFkNDIzNzg3YzkvdGFibGVyYW5nZTpkYjkzMDZiZGM4ZDg0MTcxYjRkNTAzMWQ0MjM3ODdjOV8wLTEtMS0xLTAvdGV4dHJlZ2lvbjo1YzIyODIyZTgyNWM0MWZiYjMxNTU1YzYzZWNjMjllN18xNQ_9bfbc76d-8528-4554-a653-e40b04575ad7">Texas</ix:nonNumeric></span></div></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%"><ix:nonNumeric contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406" name="dei:EntityAddressPostalZipCode" id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGFibGU6ZGI5MzA2YmRjOGQ4NDE3MWI0ZDUwMzFkNDIzNzg3YzkvdGFibGVyYW5nZTpkYjkzMDZiZGM4ZDg0MTcxYjRkNTAzMWQ0MjM3ODdjOV8wLTQtMS0xLTA_d4c18b7b-fbab-4e96-aa01-cc1d3f621feb">77546</ix:nonNumeric></span></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="6" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(Address of principal executive offices)</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(Zip Code)</span></td></tr></table></div><div><span><br/></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Registrant&#8217;s telephone number, including area code: (<ix:nonNumeric contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406" name="dei:CityAreaCode" id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8zMzM3_f6ad1790-2a8a-49d0-b7e9-ec78b7d21414">866</ix:nonNumeric>) <ix:nonNumeric contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406" name="dei:LocalPhoneNumber" id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8zMzQx_7ef0ea04-8f42-4631-994c-d907c40f3e7d">788-9007</ix:nonNumeric></span></div><div style="text-align:center"><span><br/></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%"><ix:nonNumeric contextRef="i67f431c3812b4fc68768ea330cd1555e_D20210406-20210406" name="dei:EntityAddressAddressLine1" id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8xNjQ5MjY3NDQ1MTIy_184ae00f-e601-488e-9b1a-f3007a2dac69">820 S. Friendswood Drive</ix:nonNumeric>, <ix:nonNumeric contextRef="i67f431c3812b4fc68768ea330cd1555e_D20210406-20210406" name="dei:EntityAddressAddressLine2" id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8xNjQ5MjY3NDQ1MTIz_4098a87a-dbb3-44dc-b7b9-b34f01c89ff4">Suite 201</ix:nonNumeric></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%"><ix:nonNumeric contextRef="i67f431c3812b4fc68768ea330cd1555e_D20210406-20210406" name="dei:EntityAddressCityOrTown" id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8xNjQ5MjY3NDQ1MTI0_3d507740-839e-4d4a-b101-2abe18e55e07">Friendswood</ix:nonNumeric>, <ix:nonNumeric contextRef="i67f431c3812b4fc68768ea330cd1555e_D20210406-20210406" format="ixt-sec:stateprovnameen" name="dei:EntityAddressStateOrProvince" id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8xNjQ5MjY3NDQ1MTI1_65e2d9e0-ee1c-405e-b90a-ac04d9661727">Texas</ix:nonNumeric> <ix:nonNumeric contextRef="i67f431c3812b4fc68768ea330cd1555e_D20210406-20210406" name="dei:EntityAddressPostalZipCode" id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8xNjQ5MjY3NDQ1MTI3_59536cef-c2e2-4715-8556-40dea5047d1e">77546</ix:nonNumeric></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:120%">(Former name or former address, if changed since last report.)</span></div><div><span><br/></span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:&#160;</span></div><div><span><br/></span></div><div style="margin-bottom:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"><ix:nonNumeric contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406" format="ixt-sec:boolballotbox" name="dei:WrittenCommunications" id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8zMzMx_c1e35221-6f4f-479b-91f6-884e8ad9451f">&#9744;</ix:nonNumeric></span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#160;&#160;&#160;&#160;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</span></div><div style="margin-bottom:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"><ix:nonNumeric contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406" format="ixt-sec:boolballotbox" name="dei:SolicitingMaterial" id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8zMzQy_69f1502f-c166-44e8-9955-180f72bc6e13">&#9744;</ix:nonNumeric>&#160;&#160;&#160;&#160;Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)&#160;</span></div><div style="margin-bottom:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"><ix:nonNumeric contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406" format="ixt-sec:boolballotbox" name="dei:PreCommencementTenderOffer" id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8zMzM0_fbdd51a9-dda2-4c69-8ae4-120b005a19fc">&#9744;</ix:nonNumeric>&#160;&#160;&#160;&#160;Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))&#160;</span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"><ix:nonNumeric contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406" format="ixt-sec:boolballotbox" name="dei:PreCommencementIssuerTenderOffer" id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8zMzQz_24cd16a9-3019-45d6-bfc9-5692f6572a45">&#9744;</ix:nonNumeric>&#160;&#160;&#160;&#160;Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))&#160;</span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#160;</span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Securities registered pursuant to Section&#160;12(b) of the Act:&#160;</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.853%"><tr><td style="width:1.0%"></td><td style="width:40.334%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.532%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.052%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:1.703%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:42.679%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Title of each class</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Trading Symbol(s)</span></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:400;line-height:100%">&#160;</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Name of each exchange on which registered</span></td></tr><tr><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%"><ix:nonNumeric contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406" name="dei:Security12bTitle" id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGFibGU6OTZkMTA2ZWYzNGQyNDlhMmIxYzNmMTUwNGYyNGQwMTkvdGFibGVyYW5nZTo5NmQxMDZlZjM0ZDI0OWEyYjFjM2YxNTA0ZjI0ZDAxOV8xLTAtMS0xLTA_e8e2edfd-5bd1-4398-b77c-74c44104cb8c">Common Stock, $0.001 par value per share</ix:nonNumeric></span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%"><ix:nonNumeric contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406" name="dei:TradingSymbol" id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGFibGU6OTZkMTA2ZWYzNGQyNDlhMmIxYzNmMTUwNGYyNGQwMTkvdGFibGVyYW5nZTo5NmQxMDZlZjM0ZDI0OWEyYjFjM2YxNTA0ZjI0ZDAxOV8xLTItMS0xLTA_189403f6-0d87-4c0f-9b03-9f6783fb68aa">CSTL</ix:nonNumeric></span></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#160;</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%"><ix:nonNumeric contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406" format="ixt-sec:exchnameen" name="dei:SecurityExchangeName" id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGFibGU6OTZkMTA2ZWYzNGQyNDlhMmIxYzNmMTUwNGYyNGQwMTkvdGFibGVyYW5nZTo5NmQxMDZlZjM0ZDI0OWEyYjFjM2YxNTA0ZjI0ZDAxOV8xLTQtMS0xLTA_0f2496f3-06d3-47c1-b402-9c04b11fda03">The Nasdaq Global Market</ix:nonNumeric></span></td></tr></table></div><div><span><br/></span></div><div style="margin-bottom:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Indicate by check mark whether the registrant is an emerging growth company as defined in as defined in Rule 405 of the Securities Act of 1933 (&#167; 230.405 of this chapter) or Rule 12b&#8211;2 of the Securities Exchange Act of 1934 (&#167; 240.12b&#8211;2 of this chapter).</span></div><div style="margin-bottom:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Emerging growth company&#160;<ix:nonNumeric contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406" format="ixt-sec:boolballotbox" name="dei:EntityEmergingGrowthCompany" id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8zMzQw_571202e9-0c65-412b-8fa3-8ba27781f0e1">&#9746;</ix:nonNumeric></span></div><div style="margin-bottom:6pt;margin-top:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange&#160;Act.&#160;<ix:nonNumeric contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406" format="ixt-sec:boolballotbox" name="dei:EntityExTransitionPeriod" id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8zMzM4_80bbb1a2-d806-44ab-bd21-ee1b9cab4f67">&#9744;</ix:nonNumeric>&#160;</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.853%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:3pt"><td colspan="3" style="border-bottom:3pt double #000000;padding:0 1pt"></td></tr></table></div><div style="height:42.75pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><span><br/></span></div></div></div><hr style="page-break-after:always"/><div style="min-height:42.75pt;width:100%"><div><span><br/></span></div></div><div style="text-align:center"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.853%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:3pt"><td colspan="3" style="border-bottom:2pt solid #000000;padding:0 1pt"></td></tr></table></div><div><span><br/></span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Item&#160;5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.</span></div><div><span><br/></span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">On April 6, 2021, the board of directors of Castle Biosciences, Inc. (the &#8220;Company&#8221;) appointed Kristen M. Oelschlager, R.N. as Chief Operating Officer of the Company.</span></div><div><span><br/></span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Ms. Oelschlager, 53, had previously been serving as the Company&#8217;s Chief Operations Officer since August 2020. Prior to that, Ms. Oelschlager served as the Company&#8217;s Senior Vice President of Clinical Operations from January 2018 to August 2020, Vice President of Clinical Operations from 2013 to 2018 and Executive Director of Operations from October 2008 to 2013. From May 1996 to September 2008, Ms. Oelschlager served as Director of Clinical Research of Arizona Pulmonary Specialists. Ms. Oelschlager completed her core nursing requirements at Purdue University and holds an A.S. degree in Nursing from Indiana Vocational Technical College.</span></div><div><span><br/></span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">There is no arrangement or understanding between Ms. Oelschlager and any other person pursuant to which Ms. Oelschlager was selected as an officer. There is no family relationship between Ms. Oelschlager and any director, executive officer or any person nominated or chosen by the Company to become a director or executive officer.</span></div><div><span><br/></span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">There was no change to Ms. Oelschlager&#8217;s compensation in connection with her appointment to Chief Operating Officer.</span></div><div><span><br/></span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Ms. Oelschlager&#8217;s daughter, Allysa Oelschlager, and son-in-law, Joshua Albers, are employed by the Company in non-officer positions. For the year ended December 31, 2020, Allysa Oelschlager and Joshua Albers received aggregate compensation of $337,110 and $344,038, respectively, of which $208,518 and $183,642, respectively, is the aggregate grant date fair value of option awards and stock awards. For the year ended December 31, 2019, Allysa Oelschlager and Joshua Albers received aggregate compensation of $152,859 and $170,237, respectively, of which $41,359 and $42,930, respectively, is the aggregate grant date fair value of option awards. The compensation for each of Allysa Oelschlager and Joshua Albers was established by the Company in accordance with its compensation practices applicable to employees with comparable qualifications and responsibilities and holding similar positions, without the involvement of Ms. Oelschlager. These amounts of compensation were calculated using the same methodology used in calculating the amount of compensation for the Company&#8217;s named executive officers as described under &#8220;Executive Compensation&#8221; in the Company&#8217;s definitive proxy statement filed with the Securities and Exchange Commission on April 23, 2020.</span></div><div><span><br/></span></div><div><span><br/></span></div><div style="margin-bottom:6pt;margin-top:6pt;text-align:center"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.853%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:3pt"><td colspan="3" style="border-bottom:2pt solid #000000;padding:0 1pt"></td></tr></table></div><div style="margin-bottom:6pt;margin-top:6pt;text-align:center"><span><br/></span></div><div style="height:42.75pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><span><br/></span></div></div></div><hr style="page-break-after:always"/><div style="min-height:42.75pt;width:100%"><div><span><br/></span></div></div><div style="text-align:center"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.853%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">SIGNATURES</span></td></tr><tr style="height:15pt"><td colspan="3" style="padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has caused this report to be signed on its behalf by the undersigned hereunto duly authorized.<br/></span></td></tr></table></div><div style="text-align:center"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.707%"><tr><td style="width:1.0%"></td><td style="width:49.926%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:14.295%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:32.479%"></td><td style="width:0.1%"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="6" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">CASTLE BIOSCIENCES, INC.</span></td></tr><tr style="height:15pt"><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="display:none"></td></tr><tr style="height:15pt"><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">By:</span></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">/s/ Derek J. Maetzold</span></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Derek J. Maetzold</span></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">President and Chief Executive Officer</span></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Date: April 9, 2021</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="display:none"></td></tr></table></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#160;</span></div><div><span><br/></span></div><div><span><br/></span></div><div style="height:42.75pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><span><br/></span></div></div></div></body></html>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.SCH
<SEQUENCE>2
<FILENAME>cstl-20210406.xsd
<DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
<TEXT>
<XBRL>
<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2021 Workiva-->
<!--r:90c79493-b842-40b7-866e-d720baa13dd6,g:ba860d66-89a3-4263-87d1-cf28d44fa600-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:cstl="http://www.castlebiosciences.com/20210406" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.castlebiosciences.com/20210406">
  <xs:import namespace="http://www.w3.org/1999/xlink" schemaLocation="http://www.xbrl.org/2003/xlink-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/dei/2019-01-31" schemaLocation="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd"/>
  <xs:annotation>
    <xs:appinfo>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="cstl-20210406_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="cstl-20210406_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="cstl-20210406_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="cstl-20210406_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple"/>
      <link:roleType id="Cover" roleURI="http://www.castlebiosciences.com/role/Cover">
        <link:definition>0001001 - Document - Cover</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xs:appinfo>
  </xs:annotation>
</xs:schema>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.CAL
<SEQUENCE>3
<FILENAME>cstl-20210406_cal.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT
<TEXT>
<XBRL>
<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2021 Workiva-->
<!--r:90c79493-b842-40b7-866e-d720baa13dd6,g:ba860d66-89a3-4263-87d1-cf28d44fa600-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.castlebiosciences.com/role/Cover" xlink:type="simple" xlink:href="cstl-20210406.xsd#Cover"/>
  <link:calculationLink xlink:role="http://www.castlebiosciences.com/role/Cover" xlink:type="extended"/>
</link:linkbase>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.DEF
<SEQUENCE>4
<FILENAME>cstl-20210406_def.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT
<TEXT>
<XBRL>
<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2021 Workiva-->
<!--r:90c79493-b842-40b7-866e-d720baa13dd6,g:ba860d66-89a3-4263-87d1-cf28d44fa600-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.castlebiosciences.com/role/Cover" xlink:type="simple" xlink:href="cstl-20210406.xsd#Cover"/>
  <link:definitionLink xlink:role="http://www.castlebiosciences.com/role/Cover" xlink:type="extended" id="i3b1cc774d93b492c8c2499231ce21ab6_Cover">
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_b6e67ca6-7716-487c-898f-e3990fdfb02f" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_DocumentType_b6e67ca6-7716-487c-898f-e3990fdfb02f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_3daa9d45-eb6c-49a8-aed2-8d2ec426be99" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_DocumentPeriodEndDate_3daa9d45-eb6c-49a8-aed2-8d2ec426be99" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_9d0d7d1c-b99c-417f-9d57-f1742d10dca1" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_EntityRegistrantName_9d0d7d1c-b99c-417f-9d57-f1742d10dca1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_6deae0b9-c8e5-4871-82e0-5ac98934eb34" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_EntityIncorporationStateCountryCode_6deae0b9-c8e5-4871-82e0-5ac98934eb34" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_e4303116-fb87-49ee-8b89-158083c149fa" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_EntityFileNumber_e4303116-fb87-49ee-8b89-158083c149fa" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_72ca6bf4-2250-4b52-9995-53a6b38feef0" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_EntityTaxIdentificationNumber_72ca6bf4-2250-4b52-9995-53a6b38feef0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_f29b3718-2f29-416a-bbca-64e198b18f3a" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_EntityAddressAddressLine1_f29b3718-2f29-416a-bbca-64e198b18f3a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine2_088f4128-dfd3-43ce-b5d9-66fdea70a205" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressAddressLine2"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_EntityAddressAddressLine2_088f4128-dfd3-43ce-b5d9-66fdea70a205" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_c57d4c9e-7e3b-4abb-a863-2a71063a5dda" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_EntityAddressCityOrTown_c57d4c9e-7e3b-4abb-a863-2a71063a5dda" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_45048069-d397-47af-a6a7-c0f3c812f011" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_EntityAddressStateOrProvince_45048069-d397-47af-a6a7-c0f3c812f011" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_4dd88318-cf09-4c9b-9d06-c510c82fd86d" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_EntityAddressPostalZipCode_4dd88318-cf09-4c9b-9d06-c510c82fd86d" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_39ca6141-6bcf-4885-9888-72c06bf43789" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_CityAreaCode_39ca6141-6bcf-4885-9888-72c06bf43789" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_ca61ced9-0149-4e4a-a411-d88e69ad7e88" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_LocalPhoneNumber_ca61ced9-0149-4e4a-a411-d88e69ad7e88" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_83a49580-9a84-4e63-87f8-ccf8712811aa" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_WrittenCommunications"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_WrittenCommunications_83a49580-9a84-4e63-87f8-ccf8712811aa" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_67ba5b40-10e3-45d1-9779-2cb3f38c6da0" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_SolicitingMaterial"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_SolicitingMaterial_67ba5b40-10e3-45d1-9779-2cb3f38c6da0" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_bd5e0cb1-3a0a-460e-9be0-a5711c75ac16" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_PreCommencementTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_PreCommencementTenderOffer_bd5e0cb1-3a0a-460e-9be0-a5711c75ac16" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_1f87a30c-25f1-4265-bdf9-fd99ea305447" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_1f87a30c-25f1-4265-bdf9-fd99ea305447" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_0124fa97-6bd6-475a-8cbf-405a677eea6f" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_Security12bTitle_0124fa97-6bd6-475a-8cbf-405a677eea6f" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_279804b2-c51b-499b-969f-fa520f1bb79c" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_TradingSymbol_279804b2-c51b-499b-969f-fa520f1bb79c" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_8920d598-c6f2-42d4-81e6-7baa98367bef" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_SecurityExchangeName_8920d598-c6f2-42d4-81e6-7baa98367bef" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_91d52d14-2f64-4c8c-8dd7-14e7c0c1aaf1" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_EntityEmergingGrowthCompany_91d52d14-2f64-4c8c-8dd7-14e7c0c1aaf1" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityExTransitionPeriod_b933cc53-de05-42f2-a5b2-0f5b264f6042" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityExTransitionPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_EntityExTransitionPeriod_b933cc53-de05-42f2-a5b2-0f5b264f6042" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_26ad0a57-fc18-484d-9f5e-50d3d7fa876d" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_EntityCentralIndexKey_26ad0a57-fc18-484d-9f5e-50d3d7fa876d" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_723113eb-82d6-436f-bfb8-b7c35f53e7af" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_AmendmentFlag_723113eb-82d6-436f-bfb8-b7c35f53e7af" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressesTable_05ca4f49-4d09-4b09-99d7-c21088998f48" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_EntityAddressesTable_05ca4f49-4d09-4b09-99d7-c21088998f48" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressesAddressTypeAxis_8f935e9b-9867-433e-9228-7b85364c283c" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressesAddressTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_EntityAddressesTable_05ca4f49-4d09-4b09-99d7-c21088998f48" xlink:to="loc_dei_EntityAddressesAddressTypeAxis_8f935e9b-9867-433e-9228-7b85364c283c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AddressTypeDomain_8f935e9b-9867-433e-9228-7b85364c283c_default" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_AddressTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_EntityAddressesAddressTypeAxis_8f935e9b-9867-433e-9228-7b85364c283c" xlink:to="loc_dei_AddressTypeDomain_8f935e9b-9867-433e-9228-7b85364c283c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AddressTypeDomain_c4895f64-12c3-42ea-90cc-6f6231de4a6b" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_AddressTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_EntityAddressesAddressTypeAxis_8f935e9b-9867-433e-9228-7b85364c283c" xlink:to="loc_dei_AddressTypeDomain_c4895f64-12c3-42ea-90cc-6f6231de4a6b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_FormerAddressMember_5aed9b13-e4fd-4015-aae6-1bbc3d3b5f71" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_FormerAddressMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_AddressTypeDomain_c4895f64-12c3-42ea-90cc-6f6231de4a6b" xlink:to="loc_dei_FormerAddressMember_5aed9b13-e4fd-4015-aae6-1bbc3d3b5f71" xlink:type="arc" order="0"/>
  </link:definitionLink>
</link:linkbase>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.LAB
<SEQUENCE>5
<FILENAME>cstl-20210406_lab.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT
<TEXT>
<XBRL>
<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2021 Workiva-->
<!--r:90c79493-b842-40b7-866e-d720baa13dd6,g:ba860d66-89a3-4263-87d1-cf28d44fa600-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/netLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedNetLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel"/>
  <link:labelLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:type="extended">
    <link:label id="lab_dei_EntityIncorporationStateCountryCode_f0264e1c-a0f6-426d-b4be-a08d240f51b8_terseLabel_en-US" xlink:label="lab_dei_EntityIncorporationStateCountryCode" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Incorporation, State or Country Code</link:label>
    <link:label id="lab_dei_EntityIncorporationStateCountryCode_label_en-US" xlink:label="lab_dei_EntityIncorporationStateCountryCode" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Incorporation, State or Country Code</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityIncorporationStateCountryCode" xlink:to="lab_dei_EntityIncorporationStateCountryCode" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressCityOrTown_0167cf43-748b-4b87-bdf6-dfd729226d55_terseLabel_en-US" xlink:label="lab_dei_EntityAddressCityOrTown" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, City or Town</link:label>
    <link:label id="lab_dei_EntityAddressCityOrTown_label_en-US" xlink:label="lab_dei_EntityAddressCityOrTown" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, City or Town</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressCityOrTown"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressCityOrTown" xlink:to="lab_dei_EntityAddressCityOrTown" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_SolicitingMaterial_df35420c-41da-4b05-9e84-306e823cd5f0_terseLabel_en-US" xlink:label="lab_dei_SolicitingMaterial" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Soliciting Material</link:label>
    <link:label id="lab_dei_SolicitingMaterial_label_en-US" xlink:label="lab_dei_SolicitingMaterial" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Soliciting Material</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_SolicitingMaterial"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_SolicitingMaterial" xlink:to="lab_dei_SolicitingMaterial" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressAddressLine1_6448e4a5-aa77-4884-bb80-294a284f06cb_terseLabel_en-US" xlink:label="lab_dei_EntityAddressAddressLine1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Address Line One</link:label>
    <link:label id="lab_dei_EntityAddressAddressLine1_label_en-US" xlink:label="lab_dei_EntityAddressAddressLine1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Address Line One</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressAddressLine1"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressAddressLine1" xlink:to="lab_dei_EntityAddressAddressLine1" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_SecurityExchangeName_c6d69a8b-fac3-405e-843b-2a2be6226d01_terseLabel_en-US" xlink:label="lab_dei_SecurityExchangeName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Security Exchange Name</link:label>
    <link:label id="lab_dei_SecurityExchangeName_label_en-US" xlink:label="lab_dei_SecurityExchangeName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Security Exchange Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_SecurityExchangeName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_SecurityExchangeName" xlink:to="lab_dei_SecurityExchangeName" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressAddressLine2_aec81209-d248-4083-936e-a0a70d7931ae_terseLabel_en-US" xlink:label="lab_dei_EntityAddressAddressLine2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Address Line Two</link:label>
    <link:label id="lab_dei_EntityAddressAddressLine2_label_en-US" xlink:label="lab_dei_EntityAddressAddressLine2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Address Line Two</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine2" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressAddressLine2"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressAddressLine2" xlink:to="lab_dei_EntityAddressAddressLine2" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_CityAreaCode_f42d73b9-e2fa-49d7-b577-9b1993f310fb_terseLabel_en-US" xlink:label="lab_dei_CityAreaCode" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">City Area Code</link:label>
    <link:label id="lab_dei_CityAreaCode_label_en-US" xlink:label="lab_dei_CityAreaCode" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">City Area Code</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_CityAreaCode"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_CityAreaCode" xlink:to="lab_dei_CityAreaCode" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressesAddressTypeAxis_f5aa0a9d-e2a9-4603-a7ad-fd8137999ad8_terseLabel_en-US" xlink:label="lab_dei_EntityAddressesAddressTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Addresses, Address Type [Axis]</link:label>
    <link:label id="lab_dei_EntityAddressesAddressTypeAxis_label_en-US" xlink:label="lab_dei_EntityAddressesAddressTypeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Addresses, Address Type [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressesAddressTypeAxis" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressesAddressTypeAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressesAddressTypeAxis" xlink:to="lab_dei_EntityAddressesAddressTypeAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityCentralIndexKey_20b02100-9650-402d-bb88-b9ac5818f871_terseLabel_en-US" xlink:label="lab_dei_EntityCentralIndexKey" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Central Index Key</link:label>
    <link:label id="lab_dei_EntityCentralIndexKey_label_en-US" xlink:label="lab_dei_EntityCentralIndexKey" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Central Index Key</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityCentralIndexKey"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCentralIndexKey" xlink:to="lab_dei_EntityCentralIndexKey" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityTaxIdentificationNumber_4e041031-e30f-4158-8b29-8842496ee563_terseLabel_en-US" xlink:label="lab_dei_EntityTaxIdentificationNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Tax Identification Number</link:label>
    <link:label id="lab_dei_EntityTaxIdentificationNumber_label_en-US" xlink:label="lab_dei_EntityTaxIdentificationNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Tax Identification Number</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityTaxIdentificationNumber" xlink:to="lab_dei_EntityTaxIdentificationNumber" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityFileNumber_fa44170e-3934-4c64-ab26-5c20d5945ea8_terseLabel_en-US" xlink:label="lab_dei_EntityFileNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity File Number</link:label>
    <link:label id="lab_dei_EntityFileNumber_label_en-US" xlink:label="lab_dei_EntityFileNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity File Number</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityFileNumber"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityFileNumber" xlink:to="lab_dei_EntityFileNumber" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentType_1691ef39-5dd7-4abb-8b11-225a92866ab0_terseLabel_en-US" xlink:label="lab_dei_DocumentType" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Type</link:label>
    <link:label id="lab_dei_DocumentType_label_en-US" xlink:label="lab_dei_DocumentType" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Type</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentType"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentType" xlink:to="lab_dei_DocumentType" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressesLineItems_6f2fd157-208e-4d67-a8b4-ea36f77d75b5_terseLabel_en-US" xlink:label="lab_dei_EntityAddressesLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Addresses [Line Items]</link:label>
    <link:label id="lab_dei_EntityAddressesLineItems_label_en-US" xlink:label="lab_dei_EntityAddressesLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Addresses [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressesLineItems" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressesLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressesLineItems" xlink:to="lab_dei_EntityAddressesLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityEmergingGrowthCompany_27048f91-a02f-4d84-bed4-de4b9bfc5c78_terseLabel_en-US" xlink:label="lab_dei_EntityEmergingGrowthCompany" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Emerging Growth Company</link:label>
    <link:label id="lab_dei_EntityEmergingGrowthCompany_label_en-US" xlink:label="lab_dei_EntityEmergingGrowthCompany" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Emerging Growth Company</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityEmergingGrowthCompany" xlink:to="lab_dei_EntityEmergingGrowthCompany" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_Security12bTitle_58682e3a-2375-46e6-9f7e-9869ff746a93_terseLabel_en-US" xlink:label="lab_dei_Security12bTitle" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Title of 12(b) Security</link:label>
    <link:label id="lab_dei_Security12bTitle_label_en-US" xlink:label="lab_dei_Security12bTitle" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Title of 12(b) Security</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_Security12bTitle"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_Security12bTitle" xlink:to="lab_dei_Security12bTitle" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_AmendmentFlag_753e29f8-e9ee-4428-8cf3-2a61084b340a_terseLabel_en-US" xlink:label="lab_dei_AmendmentFlag" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amendment Flag</link:label>
    <link:label id="lab_dei_AmendmentFlag_label_en-US" xlink:label="lab_dei_AmendmentFlag" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amendment Flag</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_AmendmentFlag"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_AmendmentFlag" xlink:to="lab_dei_AmendmentFlag" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressStateOrProvince_4a9c43cf-58d2-40c1-82fa-a98bc8cc6656_terseLabel_en-US" xlink:label="lab_dei_EntityAddressStateOrProvince" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, State or Province</link:label>
    <link:label id="lab_dei_EntityAddressStateOrProvince_label_en-US" xlink:label="lab_dei_EntityAddressStateOrProvince" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, State or Province</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressStateOrProvince"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressStateOrProvince" xlink:to="lab_dei_EntityAddressStateOrProvince" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_TradingSymbol_03c463f6-db69-44e2-ac20-0f8c05b4a721_terseLabel_en-US" xlink:label="lab_dei_TradingSymbol" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trading Symbol</link:label>
    <link:label id="lab_dei_TradingSymbol_label_en-US" xlink:label="lab_dei_TradingSymbol" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trading Symbol</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_TradingSymbol"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_TradingSymbol" xlink:to="lab_dei_TradingSymbol" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentPeriodEndDate_5b29d0ee-1b16-4856-a335-13875fbfde21_terseLabel_en-US" xlink:label="lab_dei_DocumentPeriodEndDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Period End Date</link:label>
    <link:label id="lab_dei_DocumentPeriodEndDate_label_en-US" xlink:label="lab_dei_DocumentPeriodEndDate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Period End Date</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentPeriodEndDate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentPeriodEndDate" xlink:to="lab_dei_DocumentPeriodEndDate" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityRegistrantName_c1c66723-88ce-42e0-9101-79d25e06bc1f_terseLabel_en-US" xlink:label="lab_dei_EntityRegistrantName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Registrant Name</link:label>
    <link:label id="lab_dei_EntityRegistrantName_label_en-US" xlink:label="lab_dei_EntityRegistrantName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Registrant Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityRegistrantName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityRegistrantName" xlink:to="lab_dei_EntityRegistrantName" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_WrittenCommunications_5bccdc1a-c8ab-4c33-8c64-35679c85d772_terseLabel_en-US" xlink:label="lab_dei_WrittenCommunications" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Written Communications</link:label>
    <link:label id="lab_dei_WrittenCommunications_label_en-US" xlink:label="lab_dei_WrittenCommunications" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Written Communications</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_WrittenCommunications"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_WrittenCommunications" xlink:to="lab_dei_WrittenCommunications" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_AddressTypeDomain_488e6136-c9fa-4e7d-afa7-2321ae5c7d29_terseLabel_en-US" xlink:label="lab_dei_AddressTypeDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Address Type [Domain]</link:label>
    <link:label id="lab_dei_AddressTypeDomain_label_en-US" xlink:label="lab_dei_AddressTypeDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Address Type [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AddressTypeDomain" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_AddressTypeDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_AddressTypeDomain" xlink:to="lab_dei_AddressTypeDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_PreCommencementTenderOffer_881f4de8-9878-496d-92ea-5d4f50bc42bf_terseLabel_en-US" xlink:label="lab_dei_PreCommencementTenderOffer" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pre-commencement Tender Offer</link:label>
    <link:label id="lab_dei_PreCommencementTenderOffer_label_en-US" xlink:label="lab_dei_PreCommencementTenderOffer" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pre-commencement Tender Offer</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_PreCommencementTenderOffer"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_PreCommencementTenderOffer" xlink:to="lab_dei_PreCommencementTenderOffer" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressesTable_2db10ff7-a5fa-4a96-9f28-18a3aab2262c_terseLabel_en-US" xlink:label="lab_dei_EntityAddressesTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Addresses [Table]</link:label>
    <link:label id="lab_dei_EntityAddressesTable_label_en-US" xlink:label="lab_dei_EntityAddressesTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Addresses [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressesTable" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressesTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressesTable" xlink:to="lab_dei_EntityAddressesTable" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityExTransitionPeriod_fafce687-29f1-42ec-9cc8-b6a95801f019_terseLabel_en-US" xlink:label="lab_dei_EntityExTransitionPeriod" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Ex Transition Period</link:label>
    <link:label id="lab_dei_EntityExTransitionPeriod_label_en-US" xlink:label="lab_dei_EntityExTransitionPeriod" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Ex Transition Period</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityExTransitionPeriod" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityExTransitionPeriod"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityExTransitionPeriod" xlink:to="lab_dei_EntityExTransitionPeriod" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_LocalPhoneNumber_376f4f8c-e68a-43a7-8ba2-a55f6a67b4d2_terseLabel_en-US" xlink:label="lab_dei_LocalPhoneNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Local Phone Number</link:label>
    <link:label id="lab_dei_LocalPhoneNumber_label_en-US" xlink:label="lab_dei_LocalPhoneNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Local Phone Number</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LocalPhoneNumber"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_LocalPhoneNumber" xlink:to="lab_dei_LocalPhoneNumber" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_FormerAddressMember_656e8389-a83d-4f2c-8113-ba36644f979c_terseLabel_en-US" xlink:label="lab_dei_FormerAddressMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Former Address</link:label>
    <link:label id="lab_dei_FormerAddressMember_label_en-US" xlink:label="lab_dei_FormerAddressMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Former Address [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_FormerAddressMember" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_FormerAddressMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_FormerAddressMember" xlink:to="lab_dei_FormerAddressMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressPostalZipCode_49703a4e-4b1d-4a3a-a49f-2546e5332698_terseLabel_en-US" xlink:label="lab_dei_EntityAddressPostalZipCode" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Postal Zip Code</link:label>
    <link:label id="lab_dei_EntityAddressPostalZipCode_label_en-US" xlink:label="lab_dei_EntityAddressPostalZipCode" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Postal Zip Code</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressPostalZipCode"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressPostalZipCode" xlink:to="lab_dei_EntityAddressPostalZipCode" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_PreCommencementIssuerTenderOffer_eaa87be1-0634-4a93-ba4c-a31945b5e663_terseLabel_en-US" xlink:label="lab_dei_PreCommencementIssuerTenderOffer" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pre-commencement Issuer Tender Offer</link:label>
    <link:label id="lab_dei_PreCommencementIssuerTenderOffer_label_en-US" xlink:label="lab_dei_PreCommencementIssuerTenderOffer" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pre-commencement Issuer Tender Offer</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_PreCommencementIssuerTenderOffer" xlink:to="lab_dei_PreCommencementIssuerTenderOffer" xlink:type="arc" order="1"/>
  </link:labelLink>
</link:linkbase>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.PRE
<SEQUENCE>6
<FILENAME>cstl-20210406_pre.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT
<TEXT>
<XBRL>
<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2021 Workiva-->
<!--r:90c79493-b842-40b7-866e-d720baa13dd6,g:ba860d66-89a3-4263-87d1-cf28d44fa600-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.castlebiosciences.com/role/Cover" xlink:type="simple" xlink:href="cstl-20210406.xsd#Cover"/>
  <link:presentationLink xlink:role="http://www.castlebiosciences.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressesTable_05ca4f49-4d09-4b09-99d7-c21088998f48" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressesTable"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressesAddressTypeAxis_8f935e9b-9867-433e-9228-7b85364c283c" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressesAddressTypeAxis"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityAddressesTable_05ca4f49-4d09-4b09-99d7-c21088998f48" xlink:to="loc_dei_EntityAddressesAddressTypeAxis_8f935e9b-9867-433e-9228-7b85364c283c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AddressTypeDomain_c4895f64-12c3-42ea-90cc-6f6231de4a6b" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_AddressTypeDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityAddressesAddressTypeAxis_8f935e9b-9867-433e-9228-7b85364c283c" xlink:to="loc_dei_AddressTypeDomain_c4895f64-12c3-42ea-90cc-6f6231de4a6b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_FormerAddressMember_5aed9b13-e4fd-4015-aae6-1bbc3d3b5f71" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_FormerAddressMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_AddressTypeDomain_c4895f64-12c3-42ea-90cc-6f6231de4a6b" xlink:to="loc_dei_FormerAddressMember_5aed9b13-e4fd-4015-aae6-1bbc3d3b5f71" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressesLineItems"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityAddressesTable_05ca4f49-4d09-4b09-99d7-c21088998f48" xlink:to="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_b6e67ca6-7716-487c-898f-e3990fdfb02f" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentType"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_DocumentType_b6e67ca6-7716-487c-898f-e3990fdfb02f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_3daa9d45-eb6c-49a8-aed2-8d2ec426be99" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentPeriodEndDate"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_DocumentPeriodEndDate_3daa9d45-eb6c-49a8-aed2-8d2ec426be99" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_9d0d7d1c-b99c-417f-9d57-f1742d10dca1" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityRegistrantName"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_EntityRegistrantName_9d0d7d1c-b99c-417f-9d57-f1742d10dca1" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_6deae0b9-c8e5-4871-82e0-5ac98934eb34" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_EntityIncorporationStateCountryCode_6deae0b9-c8e5-4871-82e0-5ac98934eb34" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_e4303116-fb87-49ee-8b89-158083c149fa" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityFileNumber"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_EntityFileNumber_e4303116-fb87-49ee-8b89-158083c149fa" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_72ca6bf4-2250-4b52-9995-53a6b38feef0" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_EntityTaxIdentificationNumber_72ca6bf4-2250-4b52-9995-53a6b38feef0" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_f29b3718-2f29-416a-bbca-64e198b18f3a" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressAddressLine1"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_EntityAddressAddressLine1_f29b3718-2f29-416a-bbca-64e198b18f3a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine2_088f4128-dfd3-43ce-b5d9-66fdea70a205" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressAddressLine2"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_EntityAddressAddressLine2_088f4128-dfd3-43ce-b5d9-66fdea70a205" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_c57d4c9e-7e3b-4abb-a863-2a71063a5dda" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressCityOrTown"/>
    <link:presentationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_EntityAddressCityOrTown_c57d4c9e-7e3b-4abb-a863-2a71063a5dda" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_45048069-d397-47af-a6a7-c0f3c812f011" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressStateOrProvince"/>
    <link:presentationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_EntityAddressStateOrProvince_45048069-d397-47af-a6a7-c0f3c812f011" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_4dd88318-cf09-4c9b-9d06-c510c82fd86d" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressPostalZipCode"/>
    <link:presentationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_EntityAddressPostalZipCode_4dd88318-cf09-4c9b-9d06-c510c82fd86d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_39ca6141-6bcf-4885-9888-72c06bf43789" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_CityAreaCode"/>
    <link:presentationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_CityAreaCode_39ca6141-6bcf-4885-9888-72c06bf43789" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_ca61ced9-0149-4e4a-a411-d88e69ad7e88" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LocalPhoneNumber"/>
    <link:presentationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_LocalPhoneNumber_ca61ced9-0149-4e4a-a411-d88e69ad7e88" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_83a49580-9a84-4e63-87f8-ccf8712811aa" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_WrittenCommunications"/>
    <link:presentationArc order="14" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_WrittenCommunications_83a49580-9a84-4e63-87f8-ccf8712811aa" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_67ba5b40-10e3-45d1-9779-2cb3f38c6da0" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_SolicitingMaterial"/>
    <link:presentationArc order="15" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_SolicitingMaterial_67ba5b40-10e3-45d1-9779-2cb3f38c6da0" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_bd5e0cb1-3a0a-460e-9be0-a5711c75ac16" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_PreCommencementTenderOffer"/>
    <link:presentationArc order="16" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_PreCommencementTenderOffer_bd5e0cb1-3a0a-460e-9be0-a5711c75ac16" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_1f87a30c-25f1-4265-bdf9-fd99ea305447" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:presentationArc order="17" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_1f87a30c-25f1-4265-bdf9-fd99ea305447" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_0124fa97-6bd6-475a-8cbf-405a677eea6f" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_Security12bTitle"/>
    <link:presentationArc order="18" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_Security12bTitle_0124fa97-6bd6-475a-8cbf-405a677eea6f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_279804b2-c51b-499b-969f-fa520f1bb79c" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_TradingSymbol"/>
    <link:presentationArc order="19" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_TradingSymbol_279804b2-c51b-499b-969f-fa520f1bb79c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_8920d598-c6f2-42d4-81e6-7baa98367bef" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_SecurityExchangeName"/>
    <link:presentationArc order="20" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_SecurityExchangeName_8920d598-c6f2-42d4-81e6-7baa98367bef" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_91d52d14-2f64-4c8c-8dd7-14e7c0c1aaf1" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:presentationArc order="21" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_EntityEmergingGrowthCompany_91d52d14-2f64-4c8c-8dd7-14e7c0c1aaf1" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityExTransitionPeriod_b933cc53-de05-42f2-a5b2-0f5b264f6042" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityExTransitionPeriod"/>
    <link:presentationArc order="22" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_EntityExTransitionPeriod_b933cc53-de05-42f2-a5b2-0f5b264f6042" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_26ad0a57-fc18-484d-9f5e-50d3d7fa876d" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityCentralIndexKey"/>
    <link:presentationArc order="23" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_EntityCentralIndexKey_26ad0a57-fc18-484d-9f5e-50d3d7fa876d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_723113eb-82d6-436f-bfb8-b7c35f53e7af" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_AmendmentFlag"/>
    <link:presentationArc order="24" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityAddressesLineItems_7ec4bf36-7978-4afa-bafc-6d5409331826" xlink:to="loc_dei_AmendmentFlag_723113eb-82d6-436f-bfb8-b7c35f53e7af" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
</link:linkbase>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>7
<FILENAME>cstl-20210406_htm.xml
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<XML>
<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xml:lang="en-US"
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2019-01-31"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xbrldi="http://xbrl.org/2006/xbrldi"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="cstl-20210406.xsd" xlink:type="simple"/>
    <context id="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001447362</identifier>
        </entity>
        <period>
            <startDate>2021-04-06</startDate>
            <endDate>2021-04-06</endDate>
        </period>
    </context>
    <context id="i67f431c3812b4fc68768ea330cd1555e_D20210406-20210406">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001447362</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:EntityAddressesAddressTypeAxis">dei:FormerAddressMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2021-04-06</startDate>
            <endDate>2021-04-06</endDate>
        </period>
    </context>
    <dei:EntityCentralIndexKey
      contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406"
      id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml80L2ZyYWc6ZDQyZGYzOGQwYjNhNGViM2JjZjRmOTMyOTVmMzMzNDUvdGFibGU6OGQwYzViMTUxYjM4NDhkMmJkZjc5ZGUwNWQ4MTA5NjYvdGFibGVyYW5nZTo4ZDBjNWIxNTFiMzg0OGQyYmRmNzlkZTA1ZDgxMDk2Nl8wLTEtMS0xLTA_2c80326d-7d93-4ea8-92aa-1311cc0a7f70">0001447362</dei:EntityCentralIndexKey>
    <dei:AmendmentFlag
      contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406"
      id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml80L2ZyYWc6ZDQyZGYzOGQwYjNhNGViM2JjZjRmOTMyOTVmMzMzNDUvdGFibGU6OGQwYzViMTUxYjM4NDhkMmJkZjc5ZGUwNWQ4MTA5NjYvdGFibGVyYW5nZTo4ZDBjNWIxNTFiMzg0OGQyYmRmNzlkZTA1ZDgxMDk2Nl8xLTEtMS0xLTA_57e3685f-a1e2-4843-805e-a91f1c7e5b36">false</dei:AmendmentFlag>
    <dei:DocumentType
      contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406"
      id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8zMzM5_60a56e37-8ee1-48db-b488-d84091a7d081">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate
      contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406"
      id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8yMjc_09f87ccc-92f1-473c-a4bd-5ffac94f87f1">2021-04-06</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName
      contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406"
      id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8zMzM2_fef091e2-2bdf-4ed0-a536-c0927b4664fb">Castle Biosciences, Inc.</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode
      contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406"
      id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGFibGU6YjM0NDk0MDI5ODViNGEzODgyNmViNjgwOWUwNzRhYmMvdGFibGVyYW5nZTpiMzQ0OTQwMjk4NWI0YTM4ODI2ZWI2ODA5ZTA3NGFiY18xLTAtMS0xLTA_6f549b47-c71e-4241-bcc1-4fd65968a747">DE</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber
      contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406"
      id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGFibGU6YjM0NDk0MDI5ODViNGEzODgyNmViNjgwOWUwNzRhYmMvdGFibGVyYW5nZTpiMzQ0OTQwMjk4NWI0YTM4ODI2ZWI2ODA5ZTA3NGFiY18xLTItMS0xLTA_4bd8264d-1e40-470e-8509-defa9dc5838b">001-38984</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber
      contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406"
      id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGFibGU6YjM0NDk0MDI5ODViNGEzODgyNmViNjgwOWUwNzRhYmMvdGFibGVyYW5nZTpiMzQ0OTQwMjk4NWI0YTM4ODI2ZWI2ODA5ZTA3NGFiY18xLTQtMS0xLTA_47e14228-a909-42a2-8c49-ec67094ea3cd">77-0701774</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1
      contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406"
      id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGFibGU6ZGI5MzA2YmRjOGQ4NDE3MWI0ZDUwMzFkNDIzNzg3YzkvdGFibGVyYW5nZTpkYjkzMDZiZGM4ZDg0MTcxYjRkNTAzMWQ0MjM3ODdjOV8wLTEtMS0xLTAvdGV4dHJlZ2lvbjo1YzIyODIyZTgyNWM0MWZiYjMxNTU1YzYzZWNjMjllN180_0caccf86-ddd9-42cb-9f95-6e49223f3b56">505 S. Friendswood Drive</dei:EntityAddressAddressLine1>
    <dei:EntityAddressAddressLine2
      contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406"
      id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGFibGU6ZGI5MzA2YmRjOGQ4NDE3MWI0ZDUwMzFkNDIzNzg3YzkvdGFibGVyYW5nZTpkYjkzMDZiZGM4ZDg0MTcxYjRkNTAzMWQ0MjM3ODdjOV8wLTEtMS0xLTAvdGV4dHJlZ2lvbjo1YzIyODIyZTgyNWM0MWZiYjMxNTU1YzYzZWNjMjllN184_f9cc1b3c-34b5-42f0-abe8-2f8fad764a9c">Suite 401</dei:EntityAddressAddressLine2>
    <dei:EntityAddressCityOrTown
      contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406"
      id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGFibGU6ZGI5MzA2YmRjOGQ4NDE3MWI0ZDUwMzFkNDIzNzg3YzkvdGFibGVyYW5nZTpkYjkzMDZiZGM4ZDg0MTcxYjRkNTAzMWQ0MjM3ODdjOV8wLTEtMS0xLTAvdGV4dHJlZ2lvbjo1YzIyODIyZTgyNWM0MWZiYjMxNTU1YzYzZWNjMjllN18xMQ_af092b16-a1a8-4f80-8494-d3ca5196b816">Friendswood</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince
      contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406"
      id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGFibGU6ZGI5MzA2YmRjOGQ4NDE3MWI0ZDUwMzFkNDIzNzg3YzkvdGFibGVyYW5nZTpkYjkzMDZiZGM4ZDg0MTcxYjRkNTAzMWQ0MjM3ODdjOV8wLTEtMS0xLTAvdGV4dHJlZ2lvbjo1YzIyODIyZTgyNWM0MWZiYjMxNTU1YzYzZWNjMjllN18xNQ_9bfbc76d-8528-4554-a653-e40b04575ad7">TX</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode
      contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406"
      id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGFibGU6ZGI5MzA2YmRjOGQ4NDE3MWI0ZDUwMzFkNDIzNzg3YzkvdGFibGVyYW5nZTpkYjkzMDZiZGM4ZDg0MTcxYjRkNTAzMWQ0MjM3ODdjOV8wLTQtMS0xLTA_d4c18b7b-fbab-4e96-aa01-cc1d3f621feb">77546</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode
      contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406"
      id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8zMzM3_f6ad1790-2a8a-49d0-b7e9-ec78b7d21414">866</dei:CityAreaCode>
    <dei:LocalPhoneNumber
      contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406"
      id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8zMzQx_7ef0ea04-8f42-4631-994c-d907c40f3e7d">788-9007</dei:LocalPhoneNumber>
    <dei:EntityAddressAddressLine1
      contextRef="i67f431c3812b4fc68768ea330cd1555e_D20210406-20210406"
      id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8xNjQ5MjY3NDQ1MTIy_184ae00f-e601-488e-9b1a-f3007a2dac69">820 S. Friendswood Drive</dei:EntityAddressAddressLine1>
    <dei:EntityAddressAddressLine2
      contextRef="i67f431c3812b4fc68768ea330cd1555e_D20210406-20210406"
      id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8xNjQ5MjY3NDQ1MTIz_4098a87a-dbb3-44dc-b7b9-b34f01c89ff4">Suite 201</dei:EntityAddressAddressLine2>
    <dei:EntityAddressCityOrTown
      contextRef="i67f431c3812b4fc68768ea330cd1555e_D20210406-20210406"
      id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8xNjQ5MjY3NDQ1MTI0_3d507740-839e-4d4a-b101-2abe18e55e07">Friendswood</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince
      contextRef="i67f431c3812b4fc68768ea330cd1555e_D20210406-20210406"
      id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8xNjQ5MjY3NDQ1MTI1_65e2d9e0-ee1c-405e-b90a-ac04d9661727">TX</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode
      contextRef="i67f431c3812b4fc68768ea330cd1555e_D20210406-20210406"
      id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8xNjQ5MjY3NDQ1MTI3_59536cef-c2e2-4715-8556-40dea5047d1e">77546</dei:EntityAddressPostalZipCode>
    <dei:WrittenCommunications
      contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406"
      id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8zMzMx_c1e35221-6f4f-479b-91f6-884e8ad9451f">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial
      contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406"
      id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8zMzQy_69f1502f-c166-44e8-9955-180f72bc6e13">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer
      contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406"
      id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8zMzM0_fbdd51a9-dda2-4c69-8ae4-120b005a19fc">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer
      contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406"
      id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8zMzQz_24cd16a9-3019-45d6-bfc9-5692f6572a45">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle
      contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406"
      id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGFibGU6OTZkMTA2ZWYzNGQyNDlhMmIxYzNmMTUwNGYyNGQwMTkvdGFibGVyYW5nZTo5NmQxMDZlZjM0ZDI0OWEyYjFjM2YxNTA0ZjI0ZDAxOV8xLTAtMS0xLTA_e8e2edfd-5bd1-4398-b77c-74c44104cb8c">Common Stock, $0.001 par value per share</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406"
      id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGFibGU6OTZkMTA2ZWYzNGQyNDlhMmIxYzNmMTUwNGYyNGQwMTkvdGFibGVyYW5nZTo5NmQxMDZlZjM0ZDI0OWEyYjFjM2YxNTA0ZjI0ZDAxOV8xLTItMS0xLTA_189403f6-0d87-4c0f-9b03-9f6783fb68aa">CSTL</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406"
      id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGFibGU6OTZkMTA2ZWYzNGQyNDlhMmIxYzNmMTUwNGYyNGQwMTkvdGFibGVyYW5nZTo5NmQxMDZlZjM0ZDI0OWEyYjFjM2YxNTA0ZjI0ZDAxOV8xLTQtMS0xLTA_0f2496f3-06d3-47c1-b402-9c04b11fda03">NASDAQ</dei:SecurityExchangeName>
    <dei:EntityEmergingGrowthCompany
      contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406"
      id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8zMzQw_571202e9-0c65-412b-8fa3-8ba27781f0e1">true</dei:EntityEmergingGrowthCompany>
    <dei:EntityExTransitionPeriod
      contextRef="i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406"
      id="id3VybDovL2RvY3MudjEvZG9jOjljOGI3YWVmNzIzMzRjMjNiMzQ5M2NkM2I1Y2Y1YzQyL3NlYzo5YzhiN2FlZjcyMzM0YzIzYjM0OTNjZDNiNWNmNWM0Ml8xL2ZyYWc6YmI0OTVmZDJhZDBmNDlkNzkxMGU4MWM5YTQzMWNkNTQvdGV4dHJlZ2lvbjpiYjQ5NWZkMmFkMGY0OWQ3OTEwZTgxYzlhNDMxY2Q1NF8zMzM4_80bbb1a2-d806-44ab-bd21-ee1b9cab4f67">false</dei:EntityExTransitionPeriod>
</xbrl>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>8
<FILENAME>R1.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="report.css">
<script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script><script type="text/javascript">
							function toggleNextSibling (e) {
							if (e.nextSibling.style.display=='none') {
							e.nextSibling.style.display='block';
							} else { e.nextSibling.style.display='none'; }
							}</script>
</head>
<body>
<span style="display: none;">v3.21.1</span><table class="report" border="0" cellspacing="2" id="idm140217795716296">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Cover<br></strong></div></th>
<th class="th"><div>Apr. 06, 2021</div></th>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityAddressesLineItems', window );"><strong>Entity Addresses [Line Items]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_DocumentType', window );">Document Type</a></td>
<td class="text">8-K<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_DocumentPeriodEndDate', window );">Document Period End Date</a></td>
<td class="text">Apr.  06,  2021<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityRegistrantName', window );">Entity Registrant Name</a></td>
<td class="text">Castle Biosciences, Inc.<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityIncorporationStateCountryCode', window );">Entity Incorporation, State or Country Code</a></td>
<td class="text">DE<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityFileNumber', window );">Entity File Number</a></td>
<td class="text">001-38984<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityTaxIdentificationNumber', window );">Entity Tax Identification Number</a></td>
<td class="text">77-0701774<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityAddressAddressLine1', window );">Entity Address, Address Line One</a></td>
<td class="text">505 S. Friendswood Drive<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityAddressAddressLine2', window );">Entity Address, Address Line Two</a></td>
<td class="text">Suite 401<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityAddressCityOrTown', window );">Entity Address, City or Town</a></td>
<td class="text">Friendswood<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityAddressStateOrProvince', window );">Entity Address, State or Province</a></td>
<td class="text">TX<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityAddressPostalZipCode', window );">Entity Address, Postal Zip Code</a></td>
<td class="text">77546<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_CityAreaCode', window );">City Area Code</a></td>
<td class="text">866<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_LocalPhoneNumber', window );">Local Phone Number</a></td>
<td class="text">788-9007<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_WrittenCommunications', window );">Written Communications</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_SolicitingMaterial', window );">Soliciting Material</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_PreCommencementTenderOffer', window );">Pre-commencement Tender Offer</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_PreCommencementIssuerTenderOffer', window );">Pre-commencement Issuer Tender Offer</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">Common Stock, $0.001 par value per share<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">CSTL<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NASDAQ<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityEmergingGrowthCompany', window );">Entity Emerging Growth Company</a></td>
<td class="text">true<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityExTransitionPeriod', window );">Entity Ex Transition Period</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityCentralIndexKey', window );">Entity Central Index Key</a></td>
<td class="text">0001447362<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_AmendmentFlag', window );">Amendment Flag</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityAddressesAddressTypeAxis=dei_FormerAddressMember', window );">Former Address</a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityAddressesLineItems', window );"><strong>Entity Addresses [Line Items]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityAddressAddressLine1', window );">Entity Address, Address Line One</a></td>
<td class="text">820 S. Friendswood Drive<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityAddressAddressLine2', window );">Entity Address, Address Line Two</a></td>
<td class="text">Suite 201<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityAddressCityOrTown', window );">Entity Address, City or Town</a></td>
<td class="text">Friendswood<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityAddressStateOrProvince', window );">Entity Address, State or Province</a></td>
<td class="text">TX<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityAddressPostalZipCode', window );">Entity Address, Postal Zip Code</a></td>
<td class="text">77546<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_AmendmentFlag">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_AmendmentFlag</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_CityAreaCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Area code of city</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_CityAreaCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentPeriodEndDate">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented.  If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentPeriodEndDate</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:dateItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentType">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentType</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:submissionTypeItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressAddressLine1">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Address Line 1 such as Attn, Building Name, Street Name</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressAddressLine1</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressAddressLine2">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Address Line 2 such as Street or Suite number</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressAddressLine2</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressCityOrTown">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Name of the City or Town</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressCityOrTown</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressPostalZipCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Code for the postal or zip code</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressPostalZipCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressStateOrProvince">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Name of the state or province.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressStateOrProvince</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:stateOrProvinceItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressesLineItems">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressesLineItems</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityCentralIndexKey">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Regulation 12B<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityCentralIndexKey</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:centralIndexKeyItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityEmergingGrowthCompany">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Indicate if registrant meets the emerging growth company criteria.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Regulation 12B<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityEmergingGrowthCompany</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityExTransitionPeriod">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Indicate if an emerging growth company has elected not to use the extended transition period for complying with any new or revised financial accounting standards.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 7A<br> -Section B<br> -Subsection 2<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityExTransitionPeriod</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityFileNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityFileNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:fileNumberItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityIncorporationStateCountryCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Two-character EDGAR code representing the state or country of incorporation.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityIncorporationStateCountryCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:edgarStateCountryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityRegistrantName">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Regulation 12B<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityRegistrantName</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityTaxIdentificationNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Regulation 12B<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityTaxIdentificationNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:employerIdItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_LocalPhoneNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Local phone number for entity.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_LocalPhoneNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_PreCommencementIssuerTenderOffer">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 13e<br> -Subsection 4c<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_PreCommencementIssuerTenderOffer</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_PreCommencementTenderOffer">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 14d<br> -Subsection 2b<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_PreCommencementTenderOffer</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_Security12bTitle">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Title of a 12(b) registered security.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_Security12bTitle</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:securityTitleItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_SecurityExchangeName">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Name of the Exchange on which a security is registered.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection d1-1<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_SecurityExchangeName</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:edgarExchangeCodeItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_SolicitingMaterial">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Section 14a<br> -Number 240<br> -Subsection 12<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_SolicitingMaterial</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_TradingSymbol">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Trading symbol of an instrument as listed on an exchange.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_TradingSymbol</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:tradingSymbolItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_WrittenCommunications">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br> -Section 425<br></p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_WrittenCommunications</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressesAddressTypeAxis=dei_FormerAddressMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressesAddressTypeAxis=dei_FormerAddressMember</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
</table></div>
</div></td></tr>
</table>
</div>
</body>
</html>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EXCEL
<SEQUENCE>9
<FILENAME>Financial_Report.xlsx
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
begin 644 Financial_Report.xlsx
M4$L#!!0    ( +:)B5('04UB@0   +$    0    9&]C4')O<',O87!P+GAM
M;$V./0L",1!$_\IQO;=!P4)B0-!2L+(/>QLOD&1#LD)^OCG!CVX>;QA&WPIG
M*N*I#BV&5(_C(I(/ !47BK9.7:=N')=HI6-Y #OGD<Z,STA)8*O4'J@)I9GF
M3?X.CD:?<@X>K7A.YNJQ<&4GPZ4A!0W_<FW>J=0U[R;UEA_6\#MI7E!+ P04
M    " "VB8E2YN+#*.X    K @  $0   &1O8U!R;W!S+V-O<F4N>&ULS9+!
M2L0P$(9?17)OIVF+8NCFHGA2$%Q0O(5D=C?8-"$9:??M3>MN%]$'\)B9/]]\
M ]/I(+2/^!Q]P$@6T]7D^B$)'3;L0!0$0-('="J5.3'DYLY'IR@_XQZ"TA]J
MCU!7U34X)&44*9B!15B)3'9&"QU1D8\GO-$K/GS&?H$9#=BCPX$2\)(#D_/$
M<)SZ#BZ &4887?HNH%F)2_5/[-(!=DI.R:ZI<1S+L5ER>0<.;T^/+\NZA1T2
MJ4%C_I6LH&/ #3M/?FWN[K</3-95S8NJ+:K;+;\1O!%M^SZ[_O"["#MO[,[^
M8^.SH.S@UUW(+U!+ P04    " "VB8E2F5R<(Q &  "<)P  $P   'AL+W1H
M96UE+W1H96UE,2YX;6SM6EMSVC@4?N^OT'AG]FT+QC:!MK03<VEVV[29A.U.
M'X416(UL>621A'^_1S80RY8-[9)-NIL\!"SI^\Y%1^?H.'GS[BYBZ(:(E/)X
M8-DOV]:[MR_>X%<R)!%!,!FGK_# "J5,7K5::0##.'W)$Q+#W(*+"$MX%,O6
M7.!;&B\CUNJTV]U6A&ELH1A'9&!]7BQH0-!445IO7R"TY1\S^!7+5(UEHP$3
M5T$FN8BT\OELQ?S:WCYES^DZ'3*!;C ;6"!_SF^GY$Y:B.%4PL3 :F<_5FO'
MT=)(@(+)?90%NDGVH],5"#(-.SJ=6,YV?/;$[9^,RMIT-&T:X./Q>#BVR]*+
M<!P$X%&[GL*=]&R_I$$)M*-IT&38]MJND::JC5-/T_=]W^N;:)P*C5M/TVMW
MW=..B<:MT'@-OO%/A\.NB<:KT'3K:28G_:YKI.D6:$)&X^MZ$A6UY4#3( !8
M<';6S-(#EEXI^G64&MD=N]U!7/!8[CF)$?[&Q036:=(9EC1&<IV0!0X -\31
M3%!\KT&VBN#"DM)<D-;/*;50&@B:R('U1X(AQ=RO_?67N\FD,WJ=?3K.:Y1_
M::L!I^V[F\^3_'/HY)^GD]=-0LYPO"P)\?LC6V&')VX[$W(Z'&="?,_V]I&E
M)3+/[_D*ZTX\9Q]6EK!=S\_DGHQR([O=]EA]]D]';B/7J<"S(M>41B1%G\@M
MNN01.+5)#3(3/PB=AIAJ4!P"I DQEJ&&^+3&K!'@$WVWO@C(WXV(]ZMOFCU7
MH5A)VH3X$$8:XIQSYG/1;/L'I4;1]E6\W*.76!4!EQC?-*HU+,76>)7 \:V<
M/!T3$LV4"P9!AI<D)A*I.7Y-2!/^*Z7:_IS30/"4+R3Z2I&/:;,CIW0FS>@S
M&L%&KQMUAVC2/'K^!?F<-0H<D1L= F<;LT8AA&F[\!ZO)(Z:K<(1*T(^8ADV
M&G*U%H&V<:F$8%H2QM%X3M*T$?Q9K#63/F#([,V1=<[6D0X1DEXW0CYBSHN0
M$;\>ACA*FNVB<5@$_9Y>PTG!Z(++9OVX?H;5,VPLCO='U!=*Y \FIS_I,C0'
MHYI9";V$5FJ?JH<T/J@>,@H%\;D>/N5Z> HWEL:\4*Z">P'_T=HWPJOX@L Y
M?RY]SZ7ON?0]H=*W-R-]9\'3BUO>1FY;Q/NN,=K7-"XH8U=RS<C'5*^3*=@Y
MG\#L_6@^GO'M^MDDA*^:62TC%I!+@;-!)+C\B\KP*L0)Z&1;)0G+5--E-XH2
MGD(;;NE3]4J5U^6ON2BX/%ODZ:^A=#XLS_D\7^>TS0LS0[=R2^JVE+ZU)CA*
M]+',<$X>RPP[9SR2';9WH!TU^_9==N0CI3!3ET.X&D*^ VVZG=PZ.)Z8D;D*
MTU*0;\/YZ<5X&N(YV02Y?9A7;>?8T='[Y\%1L*/O/)8=QXCRHB'NH8:8S\-#
MAWE[7YAGE<90-!1M;*PD+$:W8+C7\2P4X&1@+: '@Z]1 O)256 Q6\8#*Y"B
M?$R,1>APYY=<7^/1DN/;IF6U;J\I=QEM(E(YPFF8$V>KRMYEL<%5'<]56_*P
MOFH]M!5.S_Y9K<B?#!%.%@L22&.4%Z9*HO,94[[G*TG$53B_13.V$I<8O./F
MQW%.4[@2=K8/ C*YNSFI>F4Q9Z;RWRT,"2Q;B%D2XDU=[=7GFYRN>B)V^I=W
MP6#R_7#)1P_E.^=?]%U#KG[VW>/Z;I,[2$R<><41 71% B.5' 86%S+D4.Z2
MD 83 <V4R43P H)DIAR F/H+O?(,N2D5SJT^.7]%+(.&3E[2)1(4BK ,!2$7
M<N/O[Y-J=XS7^BR!;814,F35%\I#B<$],W)#V%0E\Z[:)@N%V^)4S;L:OB9@
M2\-Z;ITM)__;7M0]M!<]1O.CF> >LX=SFWJXPD6L_UC6'ODRWSEPVSK> U[F
M$RQ#I'[!?8J*@!&K8KZZKT_Y)9P[M'OQ@2";_-;;I/;=X Q\U*M:I60K$3]+
M!WP?D@9CC%OT-%^/%&*MIK&MQMHQ#'F 6/,,H68XWX=%FAHSU8NL.8T*;T'5
M0.4_V]0-:/8--!R1!5XQF;8VH^1."CS<_N\-L,+$CN'MB[\!4$L#!!0    (
M +:)B5(^?.\6P 0  %P5   8    >&PO=V]R:W-H965T<R]S:&5E=#$N>&UL
MM9A=<^(V%(:OM[]"P_2BG2%@RX#)#F&&D*1E-INE@78[[?1"V (T:UNN) ?X
M]STR8-/6'),V>X,_S\NC(^G5L08;J;[H->>&;.,HT3>-M3'I^W9;!VL>,]V2
M*4_@R5*JF!FX5*NV3A5G81X41VWJ.+UVS$32& [R>U,U',C,1"+A4T5T%L=,
M[6YY)#<W#;=QO/$L5FMC;[2'@Y2M^(R;G].I@JMVH1**F"=:R(0HOKQIC-SW
MMYYG _(W?A%\HT_.B6W*0LHO]F(2WC0<2\0C'A@KP>#PPL<\BJP2</QY$&T4
M_VD#3\^/Z@]YXZ$Q"Z;Y6$:?16C6-XU^@X1\R;+(/,O-C_S0H*[5"V2D\U^R
MV;_;Z31(D&DCXT,P$,0BV1_9]I"(TP#W3  ]!-"<>_]'.>4=,VPX4')#E'T;
MU.Q)WM0\&N!$8GME9A0\%1!GAF/YPM6@;4#*WF@'A[#;?1@]$S9*58LXO2:A
M#G7_'MX&@@*#%A@TU_/.Z-TG1I@=&86AXEIS37Y_A#?(Q/!8_X'H>X6^E^MW
MSNC?R2"#L63(?)?RJN;BX?VK#PA$IX#H7 8QY4K(D-PG(8%.J^3!E?+T]YK?
MO'M7D_]N@=9%!0_Y?^8KH8UBP/C$XDHP7&?,M(DXN152!X(G ==-,DF"%H+8
M*Q![ER""FE2I5,Q.ZB:9&4@@D8J,9988M8-C6,F-B]_=(X1^0>A?0O@@( -/
M6;RHGEBXAN.X5U[_NM]!>/H%3_\2GCG;DDD(XTXL19"G#:'#%7W_RO$=U_<Q
MO.L"[_H2O,.<;QY/2#[S/R65O8@K=ITNF;7(@X*A%^J-A#EVI\#T$5C7*8W2
M^>^X\XVL-%%<<I8)&+P=!YO![HF3NZ\"'-LKF!ESN4DJX7"YDRQB>*7#N_15
M>,7,G2KY(L J*AEQS?FO&%JY.+BXO?\3;2JU81'Y3:1G[:1&T?>[G1[&5JX9
M+F[U>2^.H. ZCX(+]'LH2+E"N+BU/\H <C)=RP1SMQH1O]^_NG8<'R,J%P07
M-^W/2AC#$TA,'&?)P=MT)14NM&211DVB7 %<W+YG,A*!,")9D8\PO)5@424/
MKE++4ZX +F[84\6O DB/78KW]0_,::[(I^7R3/_A>K5DI?F[N%?_BVRB=09D
MM8"X;!T@+?V>XN8\%[:2D4OBTN\6WY,9#S(8;[LJIAHE.SYAT9T9&7QIDF^=
M%BSR)&6*O+ HXR2%YNHU4RAVN0I0W+;GBH5V^,UV\4)6#KX:@?%L_HB1G)3T
MN#D?,T;NM\&:)2M^MJ:L$7H:S>Y&/V%,I=/3BYS^/N9J9;/T RB8M760E"75
M?8L+&I6A_5;Z/,5M^DBV)="#\-&;UVG[#X5*+%RM=AJ4MD\O^C(8PQ15X/\3
MF)U;\H%7YPJ7<F#<=SJ^UZ,866G_%'?M$=A&F%O'0\16E3S_S_9I:?L4-VR[
M00"S^%! 8)*E<]/^5_DBIJ4#T[>OOVLD^]1Y;0'NE8;LO7T!7B.Y+\ I6H![
MI?5Z;UN U\A=5H![I1][7Z$ K]%$"W#O9'?FS0OP&L6S!7C[9*_,[CM^9'8E
MT"3B2Q!R6CYXF-IOY>TOC$SS[;.%-$;&^>F:,ZA1[ OP?"FE.5[8';EB0W7X
M%U!+ P04    " "VB8E2GZ ;\+$"  #B#   #0   'AL+W-T>6QE<RYX;6S=
M5VUKVS 0_BM"/V!N8FKBD1BV0&&PC4+S85^56'8$>O%DN7/ZZZ>S;"=I=67=
MA['-H<G=/;J[1W<GF:Y;=Y+\X<BY([V2NMW0HW/-^R1I#T>N6/O.-%Q[I#)6
M,>=56R=M8SDK6W!2,EG>W&2)8D+38JT[=:=<2PZFTVY#;VA2K"NCSY:4!H-?
MRA0GCTQNZ)9)L;=B6,N4D*=@7H+A8*2QQ'DJ?$,78&F? KP(&K <XRBAC05C
M$C*$[_VX_!DP::U7A90SP24-AF+=,.>XU7=>&18/QA<0&>7=J?$,:\M.B^4M
M/3L,/S[)WMB2VSG-@DZF8BUY!72LJ(_PZTR3 .B<45XH!:N-9@.'R6,4?-@#
ME_(!6OBMNHK=5R3TXE,);2"PU4GTA$8QA D*Q+^,%F)?A+W]K;"D$8_&?>S\
M;O2@?^^,X_>65Z(?]+Z:\V/1%WATUC3R]$&*6BL>]O[+"8LUF_S(T5CQY+/!
MI!R\@5M*'KEUXG!I^6%9L^.]FZ:IKW#.RW^0\Y^M<\TUMTQ>DO:C_S=7^2V,
MD_'T7!S1JP,Z6PE<A!OZ%>Y7>>9 ]IV03NA1.XJRY/K%.?7A'=O["_PJOE]?
M\HIUTNUF<$//\A=>BD[E\ZI[J,NXZBQ_AOMHD<VWL,\E=,E[7FY'U=;[021>
M\%G'!QR>(W?#$T<PGX#%$<"P/!@#S"=X87G^I_VLT/T$#..VBB(KU&>%^@2O
M&+(=/EB>N$_NG_A.\SQ-LPRKZ'8;9;#%ZI9E\!>/AG$##RP/9'I;K?%NXQ/R
M^AQ@/7UM0K"=XI.([12O-2#QNH%'GL>[C>4!#ZP+V.Q _G@>F*FX3YI"5S%N
MV G&D3S'$)C%^(QF&5*=##[Q_F"G)$WS/(X %F>0IA@"IQ%', ;  4/2='@/
M/GL?)=-[*CG_5U/\!%!+ P04    " "VB8E2EXJ[',     3 @  "P   %]R
M96QS+RYR96QSG9*Y;L,P#$!_Q=">, ?0(8@S9?$6!/D!5J(/V!(%BD6=OZ_:
MI7&0"QEY/3P2W!YI0.TXI+:+J1C]$%)I6M6X 4BV)8]ISI%"KM0L'C6'TD!$
MVV-#L%HL/D N&6:WO606IW.D5XA<UYVE/=LO3T%O@*\Z3'%":4A+,P[PS=)_
M,O?S##5%Y4HCE5L:>-/E_G;@2=&A(E@6FD7)TZ(=I7\=Q_:0T^FO8R*T>EOH
M^7%H5 J.W&,EC'%BM/XU@LD/['X 4$L#!!0    ( +:)B5*JQ"(6,P$  "("
M   /    >&PO=V]R:V)O;VLN>&ULC5'1;L(P#/R5*A^P%K0A#5%>0-N0I@V-
MB??0NM0BB2O'A8VOG]NJ&M)>]I3<V;K<7187XM.!Z)1\>1=B;FJ19IZFL:C!
MVWA'#02=5,3>BD(^IK%AL&6L <2[=)IEL]1;#&:Y&+6VG-X"$B@$*2C9$7N$
M2_R==S Y8\0#.I3OW/1W!R;Q&-#C%<K<9":)-5U>B/%*0:S;%4S.Y68R#/;
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M>1<W]T6NS>,)KM\,<'AT_@%02P,$%     @ MHF)4F60>9(9 0  SP,  !,
M  !;0V]N=&5N=%]4>7!E<UTN>&ULK9--3L,P$(6O$F5;)2XL6*"F&V +77 !
M8T\:J_Z39UK2VS-.VDJ@$A6%3:QXWKS/GI>LWH\1L.B=]=B4'5%\% )5!TYB
M'2)XKK0A.4G\FK8B2K636Q#WR^6#4,$3>*HH>Y3KU3.T<F^I>.EY&TWP39G
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M+GAM;%!+ 0(4 Q0    ( +:)B5+FXL,H[@   "L"   1              "
M :\   !D;V-0<F]P<R]C;W)E+GAM;%!+ 0(4 Q0    ( +:)B5*97)PC$ 8
M )PG   3              "  <P!  !X;"]T:&5M92]T:&5M93$N>&UL4$L!
M A0#%     @ MHF)4CY\[Q; !   7!4  !@              ("!#0@  'AL
M+W=O<FMS:&5E=',O<VAE970Q+GAM;%!+ 0(4 Q0    ( +:)B5*?H!OPL0(
M .(,   -              "  0,-  !X;"]S='EL97,N>&UL4$L! A0#%
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K  !;0V]N=&5N=%]4>7!E<UTN>&UL4$L%!@     )  D /@(  %<4      $!

end
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>10
<FILENAME>Show.js
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
// Edgar(tm) Renderer was created by staff of the U.S. Securities and Exchange Commission.  Data and content created by government employees within the scope of their employment are not subject to domestic copyright protection. 17 U.S.C. 105.
var Show={};Show.LastAR=null,Show.showAR=function(a,r,w){if(Show.LastAR)Show.hideAR();var e=a;while(e&&e.nodeName!='TABLE')e=e.nextSibling;if(!e||e.nodeName!='TABLE'){var ref=((window)?w.document:document).getElementById(r);if(ref){e=ref.cloneNode(!0);
e.removeAttribute('id');a.parentNode.appendChild(e)}}
if(e)e.style.display='block';Show.LastAR=e};Show.hideAR=function(){Show.LastAR.style.display='none'};Show.toggleNext=function(a){var e=a;while(e.nodeName!='DIV')e=e.nextSibling;if(!e.style){}else if(!e.style.display){}else{var d,p_;if(e.style.display=='none'){d='block';p='-'}else{d='none';p='+'}
e.style.display=d;if(a.textContent){a.textContent=p+a.textContent.substring(1)}else{a.innerText=p+a.innerText.substring(1)}}}
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>11
<FILENAME>report.css
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
/* Updated 2009-11-04 */
/* v2.2.0.24 */

/* DefRef Styles */
..report table.authRefData{
	background-color: #def;
	border: 2px solid #2F4497;
	font-size: 1em;
	position: absolute;
}

..report table.authRefData a {
	display: block;
	font-weight: bold;
}

..report table.authRefData p {
	margin-top: 0px;
}

..report table.authRefData .hide {
	background-color: #2F4497;
	padding: 1px 3px 0px 0px;
	text-align: right;
}

..report table.authRefData .hide a:hover {
	background-color: #2F4497;
}

..report table.authRefData .body {
	height: 150px;
	overflow: auto;
	width: 400px;
}

..report table.authRefData table{
	font-size: 1em;
}

/* Report Styles */
..pl a, .pl a:visited {
	color: black;
	text-decoration: none;
}

/* table */
..report {
	background-color: white;
	border: 2px solid #acf;
	clear: both;
	color: black;
	font: normal 8pt Helvetica, Arial, san-serif;
	margin-bottom: 2em;
}

..report hr {
	border: 1px solid #acf;
}

/* Top labels */
..report th {
	background-color: #acf;
	color: black;
	font-weight: bold;
	text-align: center;
}

..report th.void	{
	background-color: transparent;
	color: #000000;
	font: bold 10pt Helvetica, Arial, san-serif;
	text-align: left;
}

..report .pl {
	text-align: left;
	vertical-align: top;
	white-space: normal;
	width: 200px;
	white-space: normal; /* word-wrap: break-word; */
}

..report td.pl a.a {
	cursor: pointer;
	display: block;
	width: 200px;
	overflow: hidden;
}

..report td.pl div.a {
	width: 200px;
}

..report td.pl a:hover {
	background-color: #ffc;
}

/* Header rows... */
..report tr.rh {
	background-color: #acf;
	color: black;
	font-weight: bold;
}

/* Calendars... */
..report .rc {
	background-color: #f0f0f0;
}

/* Even rows... */
..report .re, .report .reu {
	background-color: #def;
}

..report .reu td {
	border-bottom: 1px solid black;
}

/* Odd rows... */
..report .ro, .report .rou {
	background-color: white;
}

..report .rou td {
	border-bottom: 1px solid black;
}

..report .rou table td, .report .reu table td {
	border-bottom: 0px solid black;
}

/* styles for footnote marker */
..report .fn {
	white-space: nowrap;
}

/* styles for numeric types */
..report .num, .report .nump {
	text-align: right;
	white-space: nowrap;
}

..report .nump {
	padding-left: 2em;
}

..report .nump {
	padding: 0px 0.4em 0px 2em;
}

/* styles for text types */
..report .text {
	text-align: left;
	white-space: normal;
}

..report .text .big {
	margin-bottom: 1em;
	width: 17em;
}

..report .text .more {
	display: none;
}

..report .text .note {
	font-style: italic;
	font-weight: bold;
}

..report .text .small {
	width: 10em;
}

..report sup {
	font-style: italic;
}

..report .outerFootnotes {
	font-size: 1em;
}
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>12
<FILENAME>FilingSummary.xml
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<XML>
<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.21.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>2</ContextCount>
  <ElementCount>95</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>1</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>0</UnitCount>
  <MyReports>
    <Report instance="cstl-20210406.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0001001 - Document - Cover</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.castlebiosciences.com/role/Cover</Role>
      <ShortName>Cover</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="8-K" original="cstl-20210406.htm">cstl-20210406.htm</File>
    <File>cstl-20210406.xsd</File>
    <File>cstl-20210406_cal.xml</File>
    <File>cstl-20210406_def.xml</File>
    <File>cstl-20210406_lab.xml</File>
    <File>cstl-20210406_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy>http://xbrl.sec.gov/dei/2019-01-31</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>JSON
<SEQUENCE>14
<FILENAME>MetaLinks.json
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
{
 "instance": {
  "cstl-20210406.htm": {
   "axisCustom": 0,
   "axisStandard": 1,
   "contextCount": 2,
   "dts": {
    "calculationLink": {
     "local": [
      "cstl-20210406_cal.xml"
     ]
    },
    "definitionLink": {
     "local": [
      "cstl-20210406_def.xml"
     ]
    },
    "inline": {
     "local": [
      "cstl-20210406.htm"
     ]
    },
    "labelLink": {
     "local": [
      "cstl-20210406_lab.xml"
     ],
     "remote": [
      "https://xbrl.sec.gov/dei/2019/dei-doc-2019-01-31.xml"
     ]
    },
    "presentationLink": {
     "local": [
      "cstl-20210406_pre.xml"
     ]
    },
    "referenceLink": {
     "remote": [
      "https://xbrl.sec.gov/dei/2019/dei-ref-2019-01-31.xml"
     ]
    },
    "schema": {
     "local": [
      "cstl-20210406.xsd"
     ],
     "remote": [
      "http://www.xbrl.org/2003/xlink-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xl-2003-12-31.xsd",
      "https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd",
      "http://www.xbrl.org/2005/xbrldt-2005.xsd",
      "http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd",
      "http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd",
      "http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd",
      "http://www.xbrl.org/lrr/role/net-2009-12-16.xsd",
      "http://www.xbrl.org/2006/ref-2006-02-27.xsd",
      "http://www.xbrl.org/lrr/role/deprecated-2009-12-16.xsd"
     ]
    }
   },
   "elementCount": 29,
   "entityCount": 1,
   "hidden": {
    "http://xbrl.sec.gov/dei/2019-01-31": 2,
    "total": 2
   },
   "keyCustom": 0,
   "keyStandard": 95,
   "memberCustom": 0,
   "memberStandard": 1,
   "nsprefix": "cstl",
   "nsuri": "http://www.castlebiosciences.com/20210406",
   "report": {
    "R1": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "cstl-20210406.htm",
      "contextRef": "i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "dei:DocumentType",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "document",
     "isDefault": "true",
     "longName": "0001001 - Document - Cover",
     "role": "http://www.castlebiosciences.com/role/Cover",
     "shortName": "Cover",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "cstl-20210406.htm",
      "contextRef": "i00508dbfcd51498da1678b83fea3f78f_D20210406-20210406",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "dei:DocumentType",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    }
   },
   "segmentCount": 1,
   "tag": {
    "dei_AddressTypeDomain": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "An entity may have several addresses for different purposes and this domain represents all such types.",
        "label": "Address Type [Domain]",
        "terseLabel": "Address Type [Domain]"
       }
      }
     },
     "localname": "AddressTypeDomain",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.castlebiosciences.com/role/Cover"
     ],
     "xbrltype": "domainItemType"
    },
    "dei_AmendmentFlag": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.",
        "label": "Amendment Flag",
        "terseLabel": "Amendment Flag"
       }
      }
     },
     "localname": "AmendmentFlag",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.castlebiosciences.com/role/Cover"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_CityAreaCode": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Area code of city",
        "label": "City Area Code",
        "terseLabel": "City Area Code"
       }
      }
     },
     "localname": "CityAreaCode",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.castlebiosciences.com/role/Cover"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_DocumentPeriodEndDate": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented.  If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD.",
        "label": "Document Period End Date",
        "terseLabel": "Document Period End Date"
       }
      }
     },
     "localname": "DocumentPeriodEndDate",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.castlebiosciences.com/role/Cover"
     ],
     "xbrltype": "dateItemType"
    },
    "dei_DocumentType": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.",
        "label": "Document Type",
        "terseLabel": "Document Type"
       }
      }
     },
     "localname": "DocumentType",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.castlebiosciences.com/role/Cover"
     ],
     "xbrltype": "submissionTypeItemType"
    },
    "dei_EntityAddressAddressLine1": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Address Line 1 such as Attn, Building Name, Street Name",
        "label": "Entity Address, Address Line One",
        "terseLabel": "Entity Address, Address Line One"
       }
      }
     },
     "localname": "EntityAddressAddressLine1",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.castlebiosciences.com/role/Cover"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressAddressLine2": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Address Line 2 such as Street or Suite number",
        "label": "Entity Address, Address Line Two",
        "terseLabel": "Entity Address, Address Line Two"
       }
      }
     },
     "localname": "EntityAddressAddressLine2",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.castlebiosciences.com/role/Cover"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressCityOrTown": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Name of the City or Town",
        "label": "Entity Address, City or Town",
        "terseLabel": "Entity Address, City or Town"
       }
      }
     },
     "localname": "EntityAddressCityOrTown",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.castlebiosciences.com/role/Cover"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressPostalZipCode": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Code for the postal or zip code",
        "label": "Entity Address, Postal Zip Code",
        "terseLabel": "Entity Address, Postal Zip Code"
       }
      }
     },
     "localname": "EntityAddressPostalZipCode",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.castlebiosciences.com/role/Cover"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressStateOrProvince": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Name of the state or province.",
        "label": "Entity Address, State or Province",
        "terseLabel": "Entity Address, State or Province"
       }
      }
     },
     "localname": "EntityAddressStateOrProvince",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.castlebiosciences.com/role/Cover"
     ],
     "xbrltype": "stateOrProvinceItemType"
    },
    "dei_EntityAddressesAddressTypeAxis": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The axis of a table defines the relationship between the domain members or categories in the table and the line items or concepts that complete the table.",
        "label": "Entity Addresses, Address Type [Axis]",
        "terseLabel": "Entity Addresses, Address Type [Axis]"
       }
      }
     },
     "localname": "EntityAddressesAddressTypeAxis",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.castlebiosciences.com/role/Cover"
     ],
     "xbrltype": "stringItemType"
    },
    "dei_EntityAddressesLineItems": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Entity Addresses [Line Items]",
        "terseLabel": "Entity Addresses [Line Items]"
       }
      }
     },
     "localname": "EntityAddressesLineItems",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.castlebiosciences.com/role/Cover"
     ],
     "xbrltype": "stringItemType"
    },
    "dei_EntityAddressesTable": {
     "auth_ref": [
      "r6"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Container of address information for the entity",
        "label": "Entity Addresses [Table]",
        "terseLabel": "Entity Addresses [Table]"
       }
      }
     },
     "localname": "EntityAddressesTable",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "dei_EntityCentralIndexKey": {
     "auth_ref": [
      "r6"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.",
        "label": "Entity Central Index Key",
        "terseLabel": "Entity Central Index Key"
       }
      }
     },
     "localname": "EntityCentralIndexKey",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.castlebiosciences.com/role/Cover"
     ],
     "xbrltype": "centralIndexKeyItemType"
    },
    "dei_EntityEmergingGrowthCompany": {
     "auth_ref": [
      "r6"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicate if registrant meets the emerging growth company criteria.",
        "label": "Entity Emerging Growth Company",
        "terseLabel": "Entity Emerging Growth Company"
       }
      }
     },
     "localname": "EntityEmergingGrowthCompany",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.castlebiosciences.com/role/Cover"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntityExTransitionPeriod": {
     "auth_ref": [
      "r8"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Indicate if an emerging growth company has elected not to use the extended transition period for complying with any new or revised financial accounting standards.",
        "label": "Entity Ex Transition Period",
        "terseLabel": "Entity Ex Transition Period"
       }
      }
     },
     "localname": "EntityExTransitionPeriod",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.castlebiosciences.com/role/Cover"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntityFileNumber": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.",
        "label": "Entity File Number",
        "terseLabel": "Entity File Number"
       }
      }
     },
     "localname": "EntityFileNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.castlebiosciences.com/role/Cover"
     ],
     "xbrltype": "fileNumberItemType"
    },
    "dei_EntityIncorporationStateCountryCode": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Two-character EDGAR code representing the state or country of incorporation.",
        "label": "Entity Incorporation, State or Country Code",
        "terseLabel": "Entity Incorporation, State or Country Code"
       }
      }
     },
     "localname": "EntityIncorporationStateCountryCode",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.castlebiosciences.com/role/Cover"
     ],
     "xbrltype": "edgarStateCountryItemType"
    },
    "dei_EntityRegistrantName": {
     "auth_ref": [
      "r6"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.",
        "label": "Entity Registrant Name",
        "terseLabel": "Entity Registrant Name"
       }
      }
     },
     "localname": "EntityRegistrantName",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.castlebiosciences.com/role/Cover"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityTaxIdentificationNumber": {
     "auth_ref": [
      "r6"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.",
        "label": "Entity Tax Identification Number",
        "terseLabel": "Entity Tax Identification Number"
       }
      }
     },
     "localname": "EntityTaxIdentificationNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.castlebiosciences.com/role/Cover"
     ],
     "xbrltype": "employerIdItemType"
    },
    "dei_FormerAddressMember": {
     "auth_ref": [
      "r5"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Former address for entity",
        "label": "Former Address [Member]",
        "terseLabel": "Former Address"
       }
      }
     },
     "localname": "FormerAddressMember",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.castlebiosciences.com/role/Cover"
     ],
     "xbrltype": "domainItemType"
    },
    "dei_LocalPhoneNumber": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Local phone number for entity.",
        "label": "Local Phone Number",
        "terseLabel": "Local Phone Number"
       }
      }
     },
     "localname": "LocalPhoneNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.castlebiosciences.com/role/Cover"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_PreCommencementIssuerTenderOffer": {
     "auth_ref": [
      "r2"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.",
        "label": "Pre-commencement Issuer Tender Offer",
        "terseLabel": "Pre-commencement Issuer Tender Offer"
       }
      }
     },
     "localname": "PreCommencementIssuerTenderOffer",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.castlebiosciences.com/role/Cover"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_PreCommencementTenderOffer": {
     "auth_ref": [
      "r3"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.",
        "label": "Pre-commencement Tender Offer",
        "terseLabel": "Pre-commencement Tender Offer"
       }
      }
     },
     "localname": "PreCommencementTenderOffer",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.castlebiosciences.com/role/Cover"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_Security12bTitle": {
     "auth_ref": [
      "r0"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Title of a 12(b) registered security.",
        "label": "Title of 12(b) Security",
        "terseLabel": "Title of 12(b) Security"
       }
      }
     },
     "localname": "Security12bTitle",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.castlebiosciences.com/role/Cover"
     ],
     "xbrltype": "securityTitleItemType"
    },
    "dei_SecurityExchangeName": {
     "auth_ref": [
      "r1"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Name of the Exchange on which a security is registered.",
        "label": "Security Exchange Name",
        "terseLabel": "Security Exchange Name"
       }
      }
     },
     "localname": "SecurityExchangeName",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.castlebiosciences.com/role/Cover"
     ],
     "xbrltype": "edgarExchangeCodeItemType"
    },
    "dei_SolicitingMaterial": {
     "auth_ref": [
      "r4"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.",
        "label": "Soliciting Material",
        "terseLabel": "Soliciting Material"
       }
      }
     },
     "localname": "SolicitingMaterial",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.castlebiosciences.com/role/Cover"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_TradingSymbol": {
     "auth_ref": [],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Trading symbol of an instrument as listed on an exchange.",
        "label": "Trading Symbol",
        "terseLabel": "Trading Symbol"
       }
      }
     },
     "localname": "TradingSymbol",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.castlebiosciences.com/role/Cover"
     ],
     "xbrltype": "tradingSymbolItemType"
    },
    "dei_WrittenCommunications": {
     "auth_ref": [
      "r7"
     ],
     "lang": {
      "en-us": {
       "role": {
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.",
        "label": "Written Communications",
        "terseLabel": "Written Communications"
       }
      }
     },
     "localname": "WrittenCommunications",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.castlebiosciences.com/role/Cover"
     ],
     "xbrltype": "booleanItemType"
    }
   },
   "unitCount": 0
  }
 },
 "std_ref": {
  "r0": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "b"
  },
  "r1": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "d1-1"
  },
  "r2": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "13e",
   "Subsection": "4c"
  },
  "r3": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "14d",
   "Subsection": "2b"
  },
  "r4": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "14a",
   "Subsection": "12"
  },
  "r5": {
   "Name": "Forms 8-K, 10-Q",
   "Number": "249",
   "Publisher": "SEC",
   "Section": "308"
  },
  "r6": {
   "Name": "Regulation 12B",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "b-2"
  },
  "r7": {
   "Name": "Securities Act",
   "Number": "230",
   "Publisher": "SEC",
   "Section": "425"
  },
  "r8": {
   "Name": "Securities Act",
   "Number": "7A",
   "Publisher": "SEC",
   "Section": "B",
   "Subsection": "2"
  }
 },
 "version": "2.1"
}
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>ZIP
<SEQUENCE>15
<FILENAME>0001447362-21-000075-xbrl.zip
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
begin 644 0001447362-21-000075-xbrl.zip
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M\1F[?W]V#G>!_1&_G/T 4$L#!!0    ( +:)B5+/\$S>B $  -@"   5
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MA:KGBWN>2$G(YQ?/UJ?'C_%%Y!?/_@M02P,$%     @ MHF)4O'7"#-\#
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MIT.S.1T_D9DLP9NZ9"/+=^G)I"\]3UI>6,^6W"RT?'F5?3^WEBQ'D+D#X Y
M"->IR ]M9SFOG UO\XTG/)<'OISUB'.9V5SKI@"E[\GEIIU<+K).)]**> OI
MS'YI2N<VMZYQK^9D?ZN4/9L6%_;P<WZ9W<TG(22)-#@"":8"8$$3()1=8I2Q
M23)#=J&)8[^%I3+'2!>3-<X? X?4G?P.J^_J426T[8K1BZ9A5@D_ACHL"XT<
M]%X*JI8'EG^C:U7)-P_UE_FW;)K*M+ ;[-_LTI&G?#I1)HHQ"B7 4'&K\# &
M3%,,HI!HBB*I8A.V57C5_-C$_80PV$!LK^D:]@[+N1\G)U:R#QU> F[VNH=V
M:XP.)MMFA[85NV=4SYB\_L]N.C2<$(RIQCP&G"<)P-3*50@: L0P1Q2;D$C1
M*2IOSS(VZ>Y&G?5!X, &G^?>F7T=L9[1N2M= \?GUDQUC]%U3!PK2I=L/T^<
MKG.O,5+7#NX0J[6\S:W5=_?RVGZ[^I/]QB>2*,*X3<4-EQ' 8:P!Q9$ B".A
MB<O'0]@Z6M=,,#;1;S &&Y"!0^D1LNM(;!&T>U)SZK#MQXI?Y-[C>I_876=V
MN.B]QZE2_-XW[G@1'$VXEA2BD &%,+4ZIA%@$7$%.YZ$*F$1Y+IO!$=C$_/>
MN'1YE_6/X*A'!/>BZSDC^#ZFCA+!T0DC.'K^"(Y\(CCJ(7^W97^;:[XJT6.D
MDD@PH)&Q^VRF$B!BF[TS8<^&R$0P-*US]FW#8Q/YLACDP'F6VTMD'59Q5PI.
M+-R6WGO)M,[5'LHLF1M,C'5.;.NO]OV>$5=OA'QI#;V]3Q<3$W,;89FR(N0,
M8!)&@"=< :,HC!+&&%>>U\F:IAJ;+,L116_%%(<X^,MA_E_' %SEV3,*]V)O
MT%#L2USW>-S(R;&"<G6"YXG,C8XVAN?F3W1=,"[TO,CY],-<Z?O_Z(<)"D6(
M8!@"1N+0IN=(N0(;!8)Q&5-(#4U:;[-K9QCI\K!&&2QA!A:G[XJP2V3;A: '
M/</HOSTS'23?X'UOI>_:'5C@#6Y5==TTL*N<+_G]!V5MIB9==3I^NIT)G4^P
M#C$,(PAT%!J 84P!%8@!2C'"C&@=D\A/U@TSC53>%FU0AANL\/K*O(G@MG(_
M FW#R-Z?L0[R/\!&[V6@R?[ R\$!-ZO+PJ$/=%T>WJ=3O3YA#<<8)J$&$8LP
MP))@P 4B()8H5#'#L>:>&X(GXR-=!!S CK+?(JZMTKO1,8RXVS#10<Y5EWLK
M>,ODP**M.E/5:<T8?VEN;NYP.?T$$@:UB1B(E4H YD+80 TA0"CF#%%"N&C=
ME+)M>&R2?+RCQ8%KK\825X>5V)6!$ZNPG?-> JSSM(?X2N8&$UZ=$]NBJWV_
M=ZG,%;L_%'JVF!"#C()Q8AFA&F!%$L"IP$#SB)@D44DLNO5\;DTR-B'N5GF"
MOQS48(FU>UGLB5/O@E@GI@8NA;4CJ4\)K,+"\8I?3Z:?J^Q5<6Y/P:LZMJO@
MW\UT?I7.KW[-L[OB^B*;W?#YPP0E(::&0<!#9'?&RG64:86!TE@P860L$\\\
MN':>D<I^@S58@0W6:'UU7T]M6^GW)FP8]?MRU4'^>YGHO0+46Q]X$=CK8G4=
MV#^\>V\91.(R+:9Z$E-"D8XX0%$2 TPT <PD&C!*F#$))IRUKHSM&A^;Z)>@
M@LP$$/U3_"O8P/5O*GMD[[#$^W!R8EW[TM&IFVS7[R-TDCV:'+R+;->9N@ZR
MRAA_D;ZU2;YRB?[[*;^:)'&D$3,4:*9M5HX1!52:""!.8$BQB'#(VRJT9'EL
M\GP$%SAT[559INNP)#N3<&(]MO3?2X:UOO;08-G>8 *L=6-;??4#>NZ-E[=9
M?LZ_Y-GWU$*<8,XDCJ0!,57NL2$2 NIZNCBC0E(I"8E)I_WQSD1C$^9N4^+C
M;<$;P!WWR;O\>NZ5>[ VZ'[9A[#N>^8&-HZU;]XU_SQ[YP8G&_?/3>/]%X;+
MG+O'$WU[F(EL.@DCB4GD;H<6A-F8K!'@$H4@-%2&L< \0:W;1$J6QR;]-;A@
MA:Z]SLMT'19V9Q).G2.W\]]+MK6^]M!IV=Y@PJQU8UN)]0.Z7R!Z?.3-+U;4
MDU@@ID*;$4,!"< T)H!'40Q@1)/8"*-T>PG6SC V*3Y>-5FA#"S,P.'TOWI4
M)K+]9:3.] QU/:DM,YTN+=5Z?X1K3&6[@U]LJG6K[JI3_<"N*?97?94NBIS/
MB]7MC=!FSPF* *72;G*1#@&#EJ^$*13KD @)C5]J79Y@;&)>9XA/(#UO;ZPE
ML6W^W)V:8?+FMJQT2);K7>^=).^8'3@YKG>JFA0WC/.7\!]Y6A1Z?I'-9K?S
M=8O6PD9D*96$'$C*!< RLFIV?5513!(F::R2!+75<.T,8Q/Q&F101ME>Q/4T
M'E9Q;W).+&-/7KQDO-?W'CJNMSN8D/>ZM:WD_0,[U)J?;JCX)9OQ=#[!E&H"
M(P(D<_<KZD0!;G@"4(0@U[%,%&*MZ\V[UL<FX?(M/2N,'FT?5?9:E)_[<'+J
M$K07'7Z5Z":W^U2C*S:'JT@WN5.J2C<.\A?JEUP[T6N+;-D#YIX@FG\V1N<3
M2J'!2E/ :$(!9D0!AC0'L<(F#H7$2+1.GING&9MT+5(@MZ &*ZS!$FQ[">_A
M];"6C\/6B47=C2@O<1_FH8?*]Q@?3.Z''=S6?8O1O=LV+[F8Z@E2 H;&)(#'
M+EASYMHW$ 60\HAS@1!!LF/+YG*"L8F^VHFXA-F]4W-%H^>5IP[D#'K%J04O
M?9HS2\X?KS%S9?:YFC)+3NUIR"R/Z]R,>7]I]^&+U*7OJ\+:Q' C-:$VT68&
MNA*8!$Q*"@3A+*8A-)9 ST[,RB0CE?.[^^ )Z;J*Z]V#666TK:K[\32,LKTH
MZM)ZV<A!_[[+JNFAFRX;G:OIN&P>ZR]V]X,KTR_7V7QS]UR4$(,-E< JW<;K
MR.ZKJ>#(AN_8$$X2@57K&MFN\;&)>XDO6 +TONVP0MQA+?>AX\0:]F#"2[I-
M+O>0;,7D8%)M<F9;HHUC_*7Y/LMG.E^']=_T\B0C,=$TH@QP&BF #9* 0A@!
MP2-",#8L8:VSZ1K[8Q/H"N(F:6POSCKJ#NNS)R$GEFB9B^"O%< CY<][7.\A
MU3JK@ZEUCTO;@MTWK.<6^$NV*/CTO^G-\L%QF"5AQ+$&6$ K7;O[!1PS U",
MB8ZC"!'6[0%?I6G&IN#=1L,5V,"B[?2;-[7,>NZ-._,UZ ZY/57=-\JU3!QK
MNUPV_CR;YEH'&[?.]:-[%\(_+!:W.M\NVVK.:2(T!"%QC_;@[G<>.9: 1Y#A
M6,2:M'_8SZ')QK8@5&J]*\3'J8U7J?:ND/<B<.@ZN0]W?<KEC:0<KVA>G>*Y
M2N>-SNXIH#=_IFGYV/Z>/MJC-R\VKZ2K'RY]\^+_4$L#!!0    ( +:)B5)<
MI= BU <  $P_   5    8W-T;"TR,#(Q,#0P-E]P<F4N>&ULU9O;;MM($H;O
M\Q1:S^V6U>=#D&20=9*%L<XD2#S(8&^(/E3;1"32(.G8?OMMRG+B4V:X%@<2
M;RB*:K*J__[4755JO?CU<KF8?<.F+>OJY1[=)WLSK$(=R^KDY=[OQ^_ [/WZ
MZMFS%_\ ^.-?GXYF;^IPOL2JFQTTZ#J,LXNR.YU]B=A^G:6F7LZ^U,W7\IL#
M>+6ZZ: ^NVK*D]-NQ@BC]S]MGEL2M!66@S>"@2!>@U$*(6I&O'.4QZC^>?+<
M.Z-(5 J,=1P$4QR,CA1"8B8*D9PB9/7015E]?=X?O&MQECM7M:NW+_=.N^[L
M^7Q^<7&Q?^F;Q7[=G,P9(7Q^TWIOW?SR0?L+OFI-K;7SU:??F[;E8PWS8^G\
MC_='G\,I+AV45=NY*O0&VO)YN[IX5 ?7K33_2[]F/VW1OX.;9M!? LJ T_W+
M-NZ]>C:;7<O1U O\A&G6O_[^Z?".R>#:;H&^K-M0YH''=C_4RWG?<GY09RZR
MSZMG=%=G^'*O+9=G"[RY=MI@>KD7\@.@'UPBB.HM_W)]X_R' V<-MIF958>/
M\H7U_;V5#9S!RPZKB-<]O3&UJ,.=1HM>Y_K[G0OG<;&Z6D0LB[=55W97KV/,
M#K;8'CN_P(+(X$02%D0D^>#SP=JH(>0N&F.M2<+<E:#O0IO[L!J=%L/^2?UM
MGI^?1XG:_@3Z$R!T/3:__,SVM6BC]&5]<ISO?'U9MH5)EDNT'JQ1&@3G")8Q
M ]H;R94(S/ P?J_N>7&W?[>Q>-V$6=U$;/(D=..&:\(#1.Y^ =8MYF>NR0^"
M<%HNXLW=_6PTXDAW]=\B]?7(YG[LS;(<"9L&X]'UP/ZTUZLN=WG.QE7+3:"Y
MY?J;>NG*J@C"6)F4R#-)Z&=:=)#GZ  J*<9I1.&4'X&3!X9W!HV-1K,>2]HM
M<_&N;I;8K+OP'I<>FT(ZC-93#BA2S$LUE> <*J#>!QZYETG3$<AXQ/3VV-AP
M$.OQ%-TR$/>^)'D5Q\,.EVVA,0B?N )MM0'AD@/O4M8C2D$LY]0P-?ZZ\MW^
M(#38U%:4I\F[941N4H/^RU)XA4H'E_W65($P.N30W21 ;BU),7G"T@A8W+:Y
M,RO($T>O'D'*'4'@(S9E'=]6\4W.$0L>G;-12$"O @CK#.2)CX&)+.O#E$=K
M1V3ACO&=F1_&@^+IXN[$&O()3\JV:US5_>:66-A(8L[D WAKL_]4)[!1:DA4
M"Q8IB<&-$54\9GL0&WP2;&PL[4Z@<5B%NCFKF]48?,Y#@0?U>=4U5P=UQ$)%
M=$B\A6!0]O,@!<.0@'3!&LL%>BY&(^5/71D$CI@0..,)OQ,<O2L7^-OY*L1&
MP0FG>=U,WN3LS2*"\<8"E8;DQ(T*F]QHT/RP.X@0.2%"GBCI3N!P["X/8Y:M
M3.5UT77=$<UR5.63 ,8DR<&Z9#E8MQ(DSY>Y28B)C,;&3YP8!(J:$"ACB+T3
MU*R56;_T\M B,>NYI@98/LLKJLK2^.! ":36>&H2'V\V><2!0;3H"=&RJ<@[
M2@HK<K:?!&4&8HH<! \(7D8+2J6\FFKB&)%_(REL$"EFTJ3\?R+O$BD'^?1#
M<UQ?5$60.HI@$31RGT7Q'IQ1')C3E"CN9(RCSR@_S ^BQ$Z/DB<*O$N,K*+P
M#\W'IOY65@$+(8DP1%F(W.:H2[L$3CD-@20>#&6)T/'RY,=]&%9@(]/#91.M
M=XF9CW7;N<5_R[-5VB9B-"8+ "'UM>C0_X05B8(@*0F&I6A4')N8.QX,XV4:
M%=F1=-XR+?V\^+I!M_*;VQR14T%!^9!R6F\D6&,,Y$B=])$ZUV:,LNQMF\.(
MF$8Y]LE:;IF!?N?1XN-I7=WD\[WG 6,_;OT/5R@<.$$I9*I161<UFC'VN]RW
M.XR%:91?-])TRSQ\:<JNP^J@7B[/JW7.WA:&.V&E(6"=$;D#JPUW*<]Q(1F=
M0VY*W1AQZ:/&AY$QC?KJYNIN&8_/]:(,95=6)^]SD-24;E$H[9WT@@ EF-,N
M&2E8K2VPX'GB)JCHQJB;/;0\#(QIE%4WU'7+5'QLL$>ZWZ2Y^IVZWXC9?$C9
MC\)'B23X/)2..!"*(%B/!)S4E 8M7:!C; CYN0?#*)E&374DG7>+EL.V/<?F
M=E]HGO8<)P&83+3?WBW!QV0A16LQ?R"%T.,S\\"/8>1,H[XZJN;;7H,PG.=U
M](HR?UQV_38KRD1R.3=7/JJ<H$L')O@<>!/IE-:(3HVQN^B^W6%\3*.JNI&F
M6^;AN'']'U0^7RU]O2B8MH8(S_J$VX.P??ZM;(+D)".)>J_M&#O;[Q@=1L(T
M*J=/5W-'IH6WE^'452>XVO1B+"-1VAQ+J\3RM!8%&(I9%.^<-3S'6#CFU'#;
M]K"]9M.HCVZL[4[41=\NL3G);/^[J2^ZT[P>GKGJJK T2A:I -;OXQ;!!# Q
M:J "=2 AYUYIO%+ZHRX,(V5*E='-E=X-8"[S;%BU93\4U_LL"Y_['H+D$)'(
M#'TF/V=I#$C*1R62(H*-1\L#^\-0F4;)=!2-=X*3@RQ=XQ:'.9R^_ ]>%4RY
M2%R_MS+0K(@1$6R2"))$'G5R1H_X6\L]X\,(F48A=7-UM_V'NIQLQ3[A>K=P
M)X5FG%*.'@SK8VJN$OCD#7@=N$R2HW9C!"-WC [#81K5TZ>K.1H&+^8/=,S]
M^OKJV?J#_M#__?K5L_\!4$L! A0#%     @ MHF)4FP=%:T*&   49P  !$
M             ( !     &-S=&PM,C R,3 T,#8N:'1M4$L! A0#%     @
MMHF)4N&Q@$Z, @  D@D  !$              ( !.1@  &-S=&PM,C R,3 T
M,#8N>'-D4$L! A0#%     @ MHF)4L_P3-Z( 0  V (  !4
M ( !]!H  &-S=&PM,C R,3 T,#9?8V%L+GAM;%!+ 0(4 Q0    ( +:)B5([
MC!,G>0@  ($^   5              "  :\<  !C<W1L+3(P,C$P-# V7V1E
M9BYX;6Q02P$"% ,4    " "VB8E2\=<(,WP,  "&=@  %0
M@ %;)0  8W-T;"TR,#(Q,#0P-E]L86(N>&UL4$L! A0#%     @ MHF)4ERE
MT"+4!P  3#\  !4              ( !"C(  &-S=&PM,C R,3 T,#9?<')E
:+GAM;%!+!08     !@ & (H!   1.@     !

end
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
