Property and Equipment - Schedule of Property, Plant, and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 8,586	$ 6,279
Less: accumulated depreciation and amortization	(3,639)	(2,406)
Property and equipment, net	4,947	3,873
Computer equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	3,206	2,261
Capitalized internal-use software
Property, Plant and Equipment [Line Items]
Total property and equipment	4,620	3,259
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	111	111
Furniture
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 649	$ 648

Amount, before accumulated depreciation and amortization, of property, plant, and equipment and finance lease right-of-use asset.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(13))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant