<SEC-DOCUMENT>0000950170-23-067790.txt : 20231204
<SEC-HEADER>0000950170-23-067790.hdr.sgml : 20231204
<ACCEPTANCE-DATETIME>20231204163610
ACCESSION NUMBER:		0000950170-23-067790
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		14
CONFORMED PERIOD OF REPORT:	20231129
ITEM INFORMATION:		Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20231204
DATE AS OF CHANGE:		20231204

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ARCA biopharma, Inc.
		CENTRAL INDEX KEY:			0000907654
		STANDARD INDUSTRIAL CLASSIFICATION:	IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES [2835]
		IRS NUMBER:				363855489
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-22873
		FILM NUMBER:		231463729

	BUSINESS ADDRESS:	
		STREET 1:		10170 CHURCH RANCH WAY
		STREET 2:		SUITE 100
		CITY:			WESTMINSTER
		STATE:			CO
		ZIP:			80021
		BUSINESS PHONE:		7209402200

	MAIL ADDRESS:	
		STREET 1:		10170 CHURCH RANCH WAY
		STREET 2:		SUITE 100
		CITY:			WESTMINSTER
		STATE:			CO
		ZIP:			80021

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NUVELO INC
		DATE OF NAME CHANGE:	20030203

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	HYSEQ INC
		DATE OF NAME CHANGE:	19970610
</SEC-HEADER>
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<TYPE>8-K
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  <div style="text-indent:-24.5pt;padding-left:24.5pt;margin-top:6pt;margin-bottom:0;text-align:left;"><span style="margin-right:1em;margin-right:1em;"><span style="font-size:10pt;font-family:Times New Roman;"><ix:nonNumeric id="F_d111e846-76f1-4054-aded-1d581e729c08" contextRef="C_6ba0ecbe-3ebd-4ae3-99d6-a91491d37965" name="dei:SolicitingMaterial" format="ixt-sec:boolballotbox"><span style="font-size:10pt;font-family:Times New Roman;">&#9744;</span></ix:nonNumeric></span></span><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)</span></div>
  <div style="text-indent:-24.5pt;padding-left:24.5pt;margin-top:6pt;margin-bottom:0;text-align:left;"><span style="margin-right:1em;margin-right:1em;"><span style="font-size:10pt;font-family:Times New Roman;"><ix:nonNumeric id="F_0d9419c6-52c7-4afb-9275-8464aad591a9" contextRef="C_6ba0ecbe-3ebd-4ae3-99d6-a91491d37965" name="dei:PreCommencementTenderOffer" format="ixt-sec:boolballotbox"><span style="font-size:10pt;font-family:Times New Roman;">&#9744;</span></ix:nonNumeric></span></span><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))</span></div>
  <div style="text-indent:-24.5pt;padding-left:24.5pt;margin-top:6pt;margin-bottom:0;text-align:left;"><span style="margin-right:1em;margin-right:1em;"><span style="font-size:10pt;font-family:Times New Roman;"><ix:nonNumeric id="F_3d542be3-804c-4399-9b7d-435bcae7458a" contextRef="C_6ba0ecbe-3ebd-4ae3-99d6-a91491d37965" name="dei:PreCommencementIssuerTenderOffer" format="ixt-sec:boolballotbox"><span style="font-size:10pt;font-family:Times New Roman;">&#9744;</span></ix:nonNumeric></span></span><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))</span></div>
  <p style="font-size:10pt;margin-top:9pt;font-family:Times New Roman;margin-bottom:9pt;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Securities registered pursuant to Section 12(b) of the Act:</span></p>
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    <td style="width:38%;"></td>
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    <td style="padding-top:0.01in;vertical-align:top;border-bottom:0.25pt solid;text-align:left;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;"><br />Title of each class</span></p></td>
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    <td style="padding-top:0.01in;vertical-align:top;text-align:left;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span><ix:nonNumeric id="F_ec8f5f62-b9de-4192-b4f9-89349077f3e9" contextRef="C_6ba0ecbe-3ebd-4ae3-99d6-a91491d37965" name="dei:SecurityExchangeName" format="ixt-sec:exchnameen"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">The Nasdaq Global Market</span></ix:nonNumeric></span></p></td>
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  <p style="font-size:10pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (&#167;&#x202f;230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (&#167;&#x202f;240.12b-2 of this chapter).</span><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;"> </span></p>
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  <p style="font-size:10pt;margin-top:9pt;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">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 Act. </span><span style="font-size:10pt;font-family:Times New Roman;">&#9744;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;border-bottom:2.25pt double #000000;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <hr style="page-break-after:always;" />
  <p style="font-size:10pt;margin-top:18pt;font-family:Times New Roman;margin-bottom:6pt;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.</span></p>
  <p style="font-size:10pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:italic;min-width:fit-content;">Amendment to Retention Bonus Letter of Thomas A. Keuer and C. Jeffrey Dekker</span><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:italic;min-width:fit-content;"> </span></p>
  <p style="font-size:10pt;margin-top:6pt;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">On November 29, 2023, the compensation committee of the board of directors of ARCA biopharma, Inc., a Delaware corporation (&#x201c;</span><span style="color:#000000;white-space:pre-wrap;text-decoration:underline;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">ARCA</span><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#x201d; or the &#34;Company&#34;), approved the amendment of certain retention bonus letters between ARCA and each of Thomas A. Keuer and C. Jeffrey Dekker to (i) increase the aggregate amount of the retention bonus with respect to each such executive by 50%, to $150,000, and (ii) in order to assist with tax obligations associated with the vesting of certain ARCA restricted stock unit awards, provide that $35,000 of each such executive&#x2019;s retention bonus will become payable on December 8, 2023, subject to each such executive&#x2019;s continued employment in good standing and compliance with the ARCA&#x2019;s policies and procedures through such date (each such portion of the applicable executive&#x2019;s retention bonus, the &#x201c;First Bonus Payment&#x201d;). The remaining portion of the retention bonus with respect to Thomas A. Keuer and C. Jeffrey Dekker, consisting of $115,000, will become payable consistent with the original terms of the applicable retention bonus letter.  Any payment related to the retention bonuses of Thomas A. Keuer and C. Jeffrey Dekker, including the First Bonus Payment, will be paid by ARCA via payroll within 30 business days of the date of occurrence of the applicable &#x201c;Payment Event Date&#x201d; (as such term is otherwise defined in the applicable amendment to the retention bonus letter).  Each such retention bonus letter will otherwise remain subject to its original terms and conditions.</span><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">   </span></p>
  <p style="font-size:10pt;margin-top:6pt;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">The original retention bonus letters between ARCA and each of Thomas A. Keuer and C. Jeffrey Dekker are incorporated herein by reference to Exhibits 10.1 and 10.2, respectively, of the Company&#x2019;s Current Report on Form 8-K, filed with the Securities and Exchange Commission on December 9, 2022.</span></p>
  <p style="font-size:10pt;margin-top:6pt;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">The foregoing description of the amendment to the retention bonus letter of Thomas A. Keuer and the amendment to the retention bonus letter of C. Jeffrey Dekker is not complete and is qualified in its entirety by reference to the full text of each such amendment, copies of which are filed as Exhibits 10.1 and 10.2, respectively to this Current Report on Form 8-K.</span></p>
  <p style="font-size:10pt;margin-top:18pt;font-family:Times New Roman;margin-bottom:6pt;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Item 9.01 Financial Statements and Exhibits.</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">(d) Exhibits.</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
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    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;"> </span></p></td>
    <td colspan="2" style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;"> </span></p></td>
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    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">10.1</span></p></td>
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;"> </span></p></td>
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><a href="abio-ex10_1.htm"><span style="color:#0000ff;white-space:pre-wrap;text-decoration:underline;min-width:fit-content;">Amendment to Retention Bonus Letter, dated December 4, 2023, by and among ARCA biopharma, Inc. and Thomas A. Keuer</span></a><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">.</span></p></td>
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    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">10.2</span></p></td>
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    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><a href="abio-ex10_2.htm"><span style="color:#0000ff;white-space:pre-wrap;text-decoration:underline;min-width:fit-content;">Amendment to Retention Bonus Letter, dated December 4, 2023, by and among ARCA biopharma, Inc. and C. Jeffrey Dekker</span></a><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">.</span></p></td>
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    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">Cover Page Interactive Data File. The cover page XBRL tags are embedded within the inline XBRL document (contained in Exhibit 101).</span></p></td>
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  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;"> </span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <hr style="page-break-after:always;" />
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:9.35pt;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">SIGNATURES</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:9.35pt;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.</span></p>
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    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:4.3pt;font-family:Times New Roman;margin-bottom:4.3pt;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">ARCA biopharma, Inc.</span><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;"><br />(Registrant)</span></p></td>
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    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
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    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:4.3pt;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">December 4, 2023</span></p></td>
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    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0.7pt;font-family:Times New Roman;margin-bottom:9.35pt;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">Name: C. Jeffrey Dekker<br />Title: Chief Financial Officer</span></p></td>
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<DOCUMENT>
<TYPE>EX-10.1
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  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:12pt;text-align:right;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">Exhibit 10.1</font></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:12pt;text-align:center;"><font style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">ARCA BIOPHARMA, INC.</font></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:12pt;text-align:center;"><font style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">AMENDMENT TO RETENTION BONUS LETTER</font></p>
  <p style="text-indent:6.667%;font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:12pt;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">This amendment (the &#x201c;</font><font style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">Amendment</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">&#x201d;) is entered into effective as of December 4, 2023 by and between Thomas A. Keuer (&#x201c;</font><font style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">Executive</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">&#x201d;) and ARCA biopharma, Inc. (the &#x201c;</font><font style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">Company</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">,&#x201d; and together with Executive, the &#x201c;</font><font style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">Parties</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">&#x201d;).</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;"> </font></p>
  <p style="text-indent:6.667%;font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:12pt;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">WHEREAS</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">, the Parties entered into a retention bonus letter agreement dated December 8, 2022 (the &#x201c;</font><font style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">Retention Agreement</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">&#x201d;).</font></p>
  <p style="text-indent:6.667%;font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:12pt;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">WHEREAS</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">, the Parties desire to amend the Retention Agreement to increase the aggregate amount of the cash retention bonus by 50%, and to provide that a portion of the cash retention bonus will become payable to Executive on December 8, 2023, and the remainder of the cash retention bonus will become payable to Executive upon the original payment event date set forth in the Retention Agreement, subject to the Executive remaining actively and continuously employed and in good standing with the Company through the applicable payment event date.</font></p>
  <p style="text-indent:6.667%;font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:12pt;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">NOW, THEREFORE</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">, in considerations of the promises, mutual covenants, and above recitals, and for other good and valuable consideration, the sufficiency of which is hereby acknowledged, Executive and the Company hereby agree as follows:</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">  </font></p>
  <div style="text-indent:6.667%;font-size:0;margin-top:0;justify-content:flex-start;margin-bottom:0;min-width:6.667%;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:2.4%;text-indent:0;display:inline-flex;justify-content:flex-start;">1.</font><div style="width:100%;display:inline;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">The first full paragraph at the top of the first page of the Retention Agreement is hereby amended and restated in its entirety as follows: </font></div></div>
  <p style="margin-left:13.333%;text-indent:7.692%;font-size:10pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">&#x201c;In recognition of your continued service with ARCA biopharma, Inc. (the &#x201c;Company&#x201d;), we are pleased to offer you the opportunity to receive a cash retention bonus in the aggregate amount of $150,000, less applicable withholdings and deductions required by law (the &#x201c;Retention Bonus&#x201d;).  Subject to the terms of this letter, you will become eligible to receive a portion of the Retention Bonus in the amount of $35,000 on December 8, 2023 (the date of occurrence of such event, the &#x201c;Payment Event One Date&#x201d;), and the remaining portion of the Retention Bonus in the amount of $115,000 upon the earlier to occur of the following: (i) a Corporate Transaction (as defined below), or (ii) the date that the board of directors of the Company (the &#x201c;Board&#x201d;) approves certain clinical development decisions (the date of occurrence of such event, the &#x201c;Payment Event Two Date,&#x201d; and together with Payment Event One Date, each a &#x201c;Payment Event Date&#x201d;).  Any payment related to the Retention Bonus will be processed and paid to you by the Company via payroll within thirty (30) business days of the date of occurrence of the applicable Payment Event Date, subject to the terms of this letter.&#x201d;</font></p>
  <p style="margin-left:6.667%;font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">&#160;</font></p>
  <div style="text-indent:6.667%;font-size:0;margin-top:0;justify-content:flex-start;margin-bottom:0;min-width:6.667%;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:2.4%;text-indent:0;display:inline-flex;justify-content:flex-start;">2.</font><div style="width:100%;display:inline;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">The second full paragraph from the top of the first page of the Retention Agreement is hereby amended and restated in its entirety as follows:</font></div></div>
  <p style="margin-left:13.333%;text-indent:7.692%;font-size:10pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">&#x201c;In order to receive each portion of the Retention Bonus, you must           (i) remain actively and continuously employed in good standing by the Company through the</font><font style="color:#ff0000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;"> </font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">applicable Payment Event Date, and (ii) otherwise comply with the terms and conditions of this letter and the Company&#x2019;s policies and procedures. In</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;"> </font></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">1</font></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><font style="white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">&#160;</font></p>
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  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><font style="white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">&#160;</font></p>
  <p style="margin-left:13.333%;font-size:10pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">order to be considered in &#x201c;good standing,&#x201d; you must have been employed continuously from the date hereof to the applicable</font><font style="color:#ff0000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;"> </font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">Payment Event Date and you must not be the subject of any disciplinary warning, whether written or oral and must not have behaved in a manner that would be grounds for discharge for &#x201c;Cause&#x201d; (as defined below).&#x201d;</font></p>
  <p style="margin-left:13.333%;text-indent:7.692%;font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><font style="white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">&#160;</font></p>
  <div style="text-indent:6.667%;font-size:0;margin-top:0;justify-content:flex-start;margin-bottom:12pt;min-width:6.667%;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:2.4%;text-indent:0;display:inline-flex;justify-content:flex-start;">3.</font><div style="width:100%;display:inline;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">The last sentence of the third full paragraph from the top of the first page of the Retention Agreement is hereby amended and restated in its entirety as follows:</font></div></div>
  <p style="margin-left:13.333%;text-indent:7.692%;font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:12pt;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">&#x201c;For clarity, should your employment terminate for any reason prior to a Payment Event Date, you will not have earned, and therefore will not receive, the portion of the Retention Bonus related to such Payment Event Date.&#x201d;</font></p>
  <div style="text-indent:6.667%;font-size:0;margin-top:0;justify-content:flex-start;margin-bottom:12pt;min-width:6.667%;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:2.4%;text-indent:0;display:inline-flex;justify-content:flex-start;">4.</font><div style="width:100%;display:inline;"><font style="color:#000000;white-space:pre-wrap;text-decoration:underline;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">Full Force and Effect</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">.  To the extent not expressly amended hereby, the Agreement and Amendment shall remain in full force and effect.</font></div></div>
  <div style="text-indent:6.667%;font-size:0;margin-top:0;justify-content:flex-start;margin-bottom:12pt;min-width:6.667%;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:2.4%;text-indent:0;display:inline-flex;justify-content:flex-start;">5.</font><div style="width:100%;display:inline;"><font style="color:#000000;white-space:pre-wrap;text-decoration:underline;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">Entire Agreement</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">.  This Amendment, the Amendment and the Agreement constitute the full and entire understanding and agreement between the Parties with regard to the subjects hereof and thereof, respectively.  This Amendment may be amended at any time only by mutual written agreement of the Parties.</font></div></div>
  <div style="text-indent:6.667%;font-size:0;margin-top:0;justify-content:flex-start;margin-bottom:12pt;min-width:6.667%;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:2.4%;text-indent:0;display:inline-flex;justify-content:flex-start;">6.</font><div style="width:100%;display:inline;"><font style="color:#000000;white-space:pre-wrap;text-decoration:underline;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">Counterparts</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">.  This Amendment may be executed in counterparts, all of which together shall constitute one instrument, and each of which may be executed by less than all of the parties to this Amendment.</font></div></div>
  <div style="text-indent:6.667%;font-size:0;margin-top:0;justify-content:flex-start;margin-bottom:12pt;min-width:6.667%;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:2.4%;text-indent:0;display:inline-flex;justify-content:flex-start;">7.</font><div style="width:100%;display:inline;"><font style="color:#000000;white-space:pre-wrap;text-decoration:underline;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">Governing Law</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">.  This Amendment will be governed by the laws of the State of Colorado (with the exception of its conflict of laws provisions).</font></div></div>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><font style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</font></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">	-</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">2</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">-</font></p>
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  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><font style="white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">&#160;</font></p>
  <p style="text-indent:6.667%;font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:12pt;text-align:left;"><font style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">IN WITNESS WHEREOF</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">, each of the Parties has executed this Amendment, in the case of the Company by its duly authorized officer, effective as of the date set forth above.</font></p>
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    <td style="padding-left:0.075in;vertical-align:top;padding-right:0.075in;"><p style="font-size:12pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="white-space:pre-wrap;min-width:fit-content;">&#160;</font></p></td>
    <td style="padding-left:0.075in;vertical-align:top;padding-right:0.075in;"><p style="font-size:12pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">ARCA BIOPHARMA, INC.</font></p></td>
    <td style="padding-left:0.075in;vertical-align:top;padding-right:0.075in;"><p style="font-size:12pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="white-space:pre-wrap;min-width:fit-content;">&#160;</font></p></td>
    <td style="padding-left:0.075in;vertical-align:top;padding-right:0.075in;"><p style="font-size:12pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">EXECUTIVE</font></p></td>
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    <td style="padding-left:0.075in;vertical-align:top;padding-right:0.075in;"><p style="font-size:12pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="white-space:pre-wrap;min-width:fit-content;">&#160;</font></p></td>
    <td style="padding-left:0.075in;vertical-align:top;padding-right:0.075in;"><p style="font-size:12pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="white-space:pre-wrap;min-width:fit-content;">&#160;</font></p></td>
    <td style="padding-left:0.075in;vertical-align:top;padding-right:0.075in;"><p style="font-size:12pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="white-space:pre-wrap;min-width:fit-content;">&#160;</font></p></td>
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    <td style="padding-left:0.075in;vertical-align:top;padding-right:0.075in;"><p style="font-size:12pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="white-space:pre-wrap;min-width:fit-content;">&#160;</font></p></td>
    <td style="padding-left:0.075in;vertical-align:top;border-bottom:0.5pt solid;padding-right:0.075in;"><p style="font-size:12pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;min-width:fit-content;">/s/ Michael Bristow</font></p></td>
    <td style="padding-left:0.075in;vertical-align:top;border-bottom:0.5pt solid #ffffff03;padding-right:0.075in;"><p style="font-size:12pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="white-space:pre-wrap;min-width:fit-content;">&#160;</font></p></td>
    <td style="padding-left:0.075in;vertical-align:top;border-bottom:0.5pt solid;padding-right:0.075in;"><p style="font-size:12pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;min-width:fit-content;">/s/ Thomas A. Keuer</font></p></td>
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    <td style="padding-left:0.075in;vertical-align:top;padding-right:0.075in;text-align:center;"><p style="font-size:12pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:right;"><font style="color:#000000;white-space:pre-wrap;min-width:fit-content;">By:</font></p></td>
    <td style="padding-left:0.075in;vertical-align:top;border-bottom:0.5pt solid;padding-right:0.075in;text-align:right;"><p style="font-size:12pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;min-width:fit-content;">Dr. Michael Bristow</font></p></td>
    <td style="padding-left:0.075in;vertical-align:top;border-bottom:0.5pt solid #ffffff03;padding-right:0.075in;text-align:center;"><p style="font-size:12pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:right;"><font style="color:#000000;white-space:pre-wrap;min-width:fit-content;">By:</font></p></td>
    <td style="padding-left:0.075in;vertical-align:top;border-bottom:0.5pt solid;padding-right:0.075in;text-align:right;"><p style="font-size:12pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;min-width:fit-content;">Thomas A. Keuer</font></p></td>
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    <td style="padding-left:0.075in;vertical-align:top;border-bottom:0.5pt solid;padding-right:0.075in;text-align:right;"><p style="font-size:12pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;min-width:fit-content;">12/4/23</font></p></td>
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<DOCUMENT>
<TYPE>EX-10.2
<SEQUENCE>3
<FILENAME>abio-ex10_2.htm
<DESCRIPTION>EX-10.2
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  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:12pt;text-align:right;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">Exhibit 10.2</font></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:12pt;text-align:center;"><font style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">ARCA BIOPHARMA, INC.</font></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:12pt;text-align:center;"><font style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">AMENDMENT TO RETENTION BONUS LETTER</font></p>
  <p style="text-indent:6.667%;font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:12pt;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">This amendment (the &#x201c;</font><font style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">Amendment</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">&#x201d;) is entered into effective as of December 4, 2023 by and between C. Jeffrey Dekker (&#x201c;</font><font style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">Executive</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">&#x201d;) and ARCA biopharma, Inc. (the &#x201c;</font><font style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">Company</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">,&#x201d; and together with Executive, the &#x201c;</font><font style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">Parties</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">&#x201d;).</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;"> </font></p>
  <p style="text-indent:6.667%;font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:12pt;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">WHEREAS</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">, the Parties entered into a retention bonus letter agreement dated December 8, 2022 (the &#x201c;</font><font style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">Retention Agreement</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">&#x201d;).</font></p>
  <p style="text-indent:6.667%;font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:12pt;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">WHEREAS</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">, the Parties desire to amend the Retention Agreement to increase the aggregate amount of the cash retention bonus by 50%, and to provide that a portion of the cash retention bonus will become payable to Executive on December 8, 2023, and the remainder of the cash retention bonus will become payable to Executive upon the original payment event date set forth in the Retention Agreement, subject to the Executive remaining actively and continuously employed and in good standing with the Company through the applicable payment event date.</font></p>
  <p style="text-indent:6.667%;font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:12pt;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">NOW, THEREFORE</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">, in considerations of the promises, mutual covenants, and above recitals, and for other good and valuable consideration, the sufficiency of which is hereby acknowledged, Executive and the Company hereby agree as follows:</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">  </font></p>
  <div style="text-indent:6.667%;font-size:0;margin-top:0;justify-content:flex-start;margin-bottom:0;min-width:6.667%;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:2.4%;text-indent:0;display:inline-flex;justify-content:flex-start;">1.</font><div style="width:100%;display:inline;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">The first full paragraph at the top of the first page of the Retention Agreement is hereby amended and restated in its entirety as follows: </font></div></div>
  <p style="margin-left:13.333%;text-indent:7.692%;font-size:10pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">&#x201c;In recognition of your continued service with ARCA biopharma, Inc. (the &#x201c;Company&#x201d;), we are pleased to offer you the opportunity to receive a cash retention bonus in the aggregate amount of $150,000, less applicable withholdings and deductions required by law (the &#x201c;Retention Bonus&#x201d;).  Subject to the terms of this letter, you will become eligible to receive a portion of the Retention Bonus in the amount of $35,000 on December 8, 2023 (the date of occurrence of such event, the &#x201c;Payment Event One Date&#x201d;), and the remaining portion of the Retention Bonus in the amount of $115,000 upon the earlier to occur of the following: (i) a Corporate Transaction (as defined below), or (ii) the date that the board of directors of the Company (the &#x201c;Board&#x201d;) approves certain clinical development decisions (the date of occurrence of such event, the &#x201c;Payment Event Two Date,&#x201d; and together with Payment Event One Date, each a &#x201c;Payment Event Date&#x201d;).  Any payment related to the Retention Bonus will be processed and paid to you by the Company via payroll within thirty (30) business days of the date of occurrence of the applicable Payment Event Date, subject to the terms of this letter.&#x201d;</font></p>
  <p style="margin-left:6.667%;font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">&#160;</font></p>
  <div style="text-indent:6.667%;font-size:0;margin-top:0;justify-content:flex-start;margin-bottom:0;min-width:6.667%;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:2.4%;text-indent:0;display:inline-flex;justify-content:flex-start;">2.</font><div style="width:100%;display:inline;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">The second full paragraph from the top of the first page of the Retention Agreement is hereby amended and restated in its entirety as follows:</font></div></div>
  <p style="margin-left:13.333%;text-indent:7.692%;font-size:10pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">&#x201c;In order to receive each portion of the Retention Bonus, you must           (i) remain actively and continuously employed in good standing by the Company through the</font><font style="color:#ff0000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;"> </font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">applicable Payment Event Date, and (ii) otherwise comply with the terms and conditions of this letter and the Company&#x2019;s policies and procedures. In</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;"> </font></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">1</font></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><font style="white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">&#160;</font></p>
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  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><font style="white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">&#160;</font></p>
  <p style="margin-left:13.333%;font-size:10pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">order to be considered in &#x201c;good standing,&#x201d; you must have been employed continuously from the date hereof to the applicable</font><font style="color:#ff0000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;"> </font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">Payment Event Date and you must not be the subject of any disciplinary warning, whether written or oral and must not have behaved in a manner that would be grounds for discharge for &#x201c;Cause&#x201d; (as defined below).&#x201d;</font></p>
  <p style="margin-left:13.333%;text-indent:7.692%;font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><font style="white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">&#160;</font></p>
  <div style="text-indent:6.667%;font-size:0;margin-top:0;justify-content:flex-start;margin-bottom:12pt;min-width:6.667%;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:2.4%;text-indent:0;display:inline-flex;justify-content:flex-start;">3.</font><div style="width:100%;display:inline;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">The last sentence of the third full paragraph from the top of the first page of the Retention Agreement is hereby amended and restated in its entirety as follows:</font></div></div>
  <p style="margin-left:13.333%;text-indent:7.692%;font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:12pt;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">&#x201c;For clarity, should your employment terminate for any reason prior to a Payment Event Date, you will not have earned, and therefore will not receive, the portion of the Retention Bonus related to such Payment Event Date.&#x201d;</font></p>
  <div style="text-indent:6.667%;font-size:0;margin-top:0;justify-content:flex-start;margin-bottom:12pt;min-width:6.667%;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:2.4%;text-indent:0;display:inline-flex;justify-content:flex-start;">4.</font><div style="width:100%;display:inline;"><font style="color:#000000;white-space:pre-wrap;text-decoration:underline;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">Full Force and Effect</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">.  To the extent not expressly amended hereby, the Agreement and Amendment shall remain in full force and effect.</font></div></div>
  <div style="text-indent:6.667%;font-size:0;margin-top:0;justify-content:flex-start;margin-bottom:12pt;min-width:6.667%;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:2.4%;text-indent:0;display:inline-flex;justify-content:flex-start;">5.</font><div style="width:100%;display:inline;"><font style="color:#000000;white-space:pre-wrap;text-decoration:underline;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">Entire Agreement</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">.  This Amendment, the Amendment and the Agreement constitute the full and entire understanding and agreement between the Parties with regard to the subjects hereof and thereof, respectively.  This Amendment may be amended at any time only by mutual written agreement of the Parties.</font></div></div>
  <div style="text-indent:6.667%;font-size:0;margin-top:0;justify-content:flex-start;margin-bottom:12pt;min-width:6.667%;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:2.4%;text-indent:0;display:inline-flex;justify-content:flex-start;">6.</font><div style="width:100%;display:inline;"><font style="color:#000000;white-space:pre-wrap;text-decoration:underline;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">Counterparts</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">.  This Amendment may be executed in counterparts, all of which together shall constitute one instrument, and each of which may be executed by less than all of the parties to this Amendment.</font></div></div>
  <div style="text-indent:6.667%;font-size:0;margin-top:0;justify-content:flex-start;margin-bottom:12pt;min-width:6.667%;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:2.4%;text-indent:0;display:inline-flex;justify-content:flex-start;">7.</font><div style="width:100%;display:inline;"><font style="color:#000000;white-space:pre-wrap;text-decoration:underline;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">Governing Law</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">.  This Amendment will be governed by the laws of the State of Colorado (with the exception of its conflict of laws provisions).</font></div></div>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><font style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</font></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">	-</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">2</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">-</font></p>
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  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><font style="white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">&#160;</font></p>
  <p style="text-indent:6.667%;font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:12pt;text-align:left;"><font style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">IN WITNESS WHEREOF</font><font style="color:#000000;white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">, each of the Parties has executed this Amendment, in the case of the Company by its duly authorized officer, effective as of the date set forth above.</font></p>
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    <td style="padding-left:0.075in;vertical-align:top;padding-right:0.075in;"><p style="font-size:12pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="white-space:pre-wrap;min-width:fit-content;">&#160;</font></p></td>
    <td style="padding-left:0.075in;vertical-align:top;padding-right:0.075in;"><p style="font-size:12pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">ARCA BIOPHARMA, INC.</font></p></td>
    <td style="padding-left:0.075in;vertical-align:top;padding-right:0.075in;"><p style="font-size:12pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="white-space:pre-wrap;min-width:fit-content;">&#160;</font></p></td>
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    <td style="padding-left:0.075in;vertical-align:top;padding-right:0.075in;"><p style="font-size:12pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="white-space:pre-wrap;min-width:fit-content;">&#160;</font></p></td>
    <td style="padding-left:0.075in;vertical-align:top;padding-right:0.075in;"><p style="font-size:12pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="white-space:pre-wrap;min-width:fit-content;">&#160;</font></p></td>
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    <td style="padding-left:0.075in;vertical-align:top;padding-right:0.075in;"><p style="font-size:12pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="white-space:pre-wrap;min-width:fit-content;">&#160;</font></p></td>
    <td style="padding-left:0.075in;vertical-align:top;border-bottom:0.5pt solid;padding-right:0.075in;"><p style="font-size:12pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;min-width:fit-content;">/s/ Michael Bristow</font></p></td>
    <td style="padding-left:0.075in;vertical-align:top;border-bottom:0.5pt solid #ffffff03;padding-right:0.075in;"><p style="font-size:12pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="white-space:pre-wrap;min-width:fit-content;">&#160;</font></p></td>
    <td style="padding-left:0.075in;vertical-align:top;border-bottom:0.5pt solid;padding-right:0.075in;"><p style="font-size:12pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><font style="color:#000000;white-space:pre-wrap;min-width:fit-content;">/s/ C. Jeffrey Dekker</font></p></td>
   </tr>
   <tr style="height:12pt;white-space:pre-wrap;word-break:break-word;">
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    <td style="padding-left:0.075in;vertical-align:top;border-bottom:0.5pt solid #ffffff03;padding-right:0.075in;text-align:center;"><p style="font-size:12pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:right;"><font style="color:#000000;white-space:pre-wrap;min-width:fit-content;">By:</font></p></td>
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   <tr style="height:12pt;white-space:pre-wrap;word-break:break-word;">
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  </table>
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<TYPE>EX-101.SCH
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<FILENAME>abio-20231129.xsd
<DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
<TEXT>
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<?xml version="1.0" encoding="US-ASCII"?>
<!-- DFIN New ActiveDisclosure (SM) XBRL Schema Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date :2023-12-04T16:16:48.2679+00:00 -->
<!-- Copyright (c) 2023 Donnelly Financial Solutions, Inc. All Rights Reserved. -->
<xsd:schema targetNamespace="http://www.arcabiopharma.com/20231129" attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:enum2="http://xbrl.org/2020/extensible-enumerations-2.0" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:us-gaap="http://fasb.org/us-gaap/2023" xmlns:dei="http://xbrl.sec.gov/dei/2023" xmlns:abio="http://www.arcabiopharma.com/20231129" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xlink="http://www.w3.org/1999/xlink">
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  <xsd:import schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" namespace="http://xbrl.org/2005/xbrldt"/>
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  <xsd:import schemaLocation="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd" namespace="http://fasb.org/us-gaap/2023"/>
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<DOCUMENT>
<TYPE>EX-101.PRE
<SEQUENCE>5
<FILENAME>abio-20231129_pre.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT
<TEXT>
<XBRL>
<?xml version="1.0" encoding="US-ASCII"?>
<!-- DFIN New ActiveDisclosure (SM) XBRL Linkbase Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date :2023-12-04T16:16:48.5497+00:00 -->
<!-- Copyright (c) 2023 Donnelly Financial Solutions, Inc. All Rights Reserved. -->
<link:linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" 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">
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    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_CityAreaCode" order="10130.0" priority="2" use="optional"/>
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    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressAddressLine2" order="10091.0" priority="2" use="optional"/>
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    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityIncorporationStateCountryCode" order="10070.0" priority="2" use="optional"/>
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityRegistrantName" order="10030.0" priority="2" use="optional"/>
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    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_PreCommencementTenderOffer" order="10180.0" priority="2" use="optional"/>
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_Security12bTitle" order="10210.0" priority="2" use="optional"/>
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<DOCUMENT>
<TYPE>EX-101.LAB
<SEQUENCE>6
<FILENAME>abio-20231129_lab.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT
<TEXT>
<XBRL>
<?xml version="1.0" encoding="US-ASCII"?>
<!-- DFIN New ActiveDisclosure (SM) XBRL Linkbase Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date :2023-12-04T16:16:48.2666+00:00 -->
<!-- Copyright (c) 2023 Donnelly Financial Solutions, Inc. All Rights Reserved. -->
<link:linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" 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">
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_SolicitingMaterial" xlink:label="dei_SolicitingMaterial"/>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_TradingSymbol" xlink:label="dei_TradingSymbol"/>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_WrittenCommunications" xlink:label="dei_WrittenCommunications"/>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CoverAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cover [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AmendmentFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amendment Flag</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CityAreaCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">City Area Code</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Period End Date</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentType_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Type</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Address Line One</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine2_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Address Line Two</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, City or Town</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Postal Zip Code</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, State or Province</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Central Index Key</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Emerging Growth Company</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFileNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity File Number</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Incorporation, State or Country Code</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityRegistrantName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Registrant Name</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Tax Identification Number</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LocalPhoneNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Local Phone Number</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_PreCommencementIssuerTenderOffer_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pre-commencement Issuer Tender Offer</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_PreCommencementTenderOffer_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pre-commencement Tender Offer</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_Security12bTitle_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Title of 12(b) Security</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_SecurityExchangeName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Security Exchange Name</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_SolicitingMaterial_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Soliciting Material</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_TradingSymbol_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trading Symbol</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_WrittenCommunications_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Written Communications</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CoverAbstract" xlink:to="dei_CoverAbstract_lbl"/>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_AmendmentFlag" xlink:to="dei_AmendmentFlag_lbl"/>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CityAreaCode" xlink:to="dei_CityAreaCode_lbl"/>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentPeriodEndDate" xlink:to="dei_DocumentPeriodEndDate_lbl"/>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentType" xlink:to="dei_DocumentType_lbl"/>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressAddressLine1" xlink:to="dei_EntityAddressAddressLine1_lbl"/>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressAddressLine2" xlink:to="dei_EntityAddressAddressLine2_lbl"/>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressCityOrTown" xlink:to="dei_EntityAddressCityOrTown_lbl"/>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressPostalZipCode" xlink:to="dei_EntityAddressPostalZipCode_lbl"/>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressStateOrProvince" xlink:to="dei_EntityAddressStateOrProvince_lbl"/>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityCentralIndexKey" xlink:to="dei_EntityCentralIndexKey_lbl"/>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityEmergingGrowthCompany" xlink:to="dei_EntityEmergingGrowthCompany_lbl"/>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityFileNumber" xlink:to="dei_EntityFileNumber_lbl"/>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityIncorporationStateCountryCode" xlink:to="dei_EntityIncorporationStateCountryCode_lbl"/>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityRegistrantName" xlink:to="dei_EntityRegistrantName_lbl"/>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityTaxIdentificationNumber" xlink:to="dei_EntityTaxIdentificationNumber_lbl"/>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_LocalPhoneNumber" xlink:to="dei_LocalPhoneNumber_lbl"/>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_PreCommencementIssuerTenderOffer" xlink:to="dei_PreCommencementIssuerTenderOffer_lbl"/>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_PreCommencementTenderOffer" xlink:to="dei_PreCommencementTenderOffer_lbl"/>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_Security12bTitle" xlink:to="dei_Security12bTitle_lbl"/>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_SecurityExchangeName" xlink:to="dei_SecurityExchangeName_lbl"/>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_SolicitingMaterial" xlink:to="dei_SolicitingMaterial_lbl"/>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_TradingSymbol" xlink:to="dei_TradingSymbol_lbl"/>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_WrittenCommunications" xlink:to="dei_WrittenCommunications_lbl"/>
  </link:labelLink>
</link:linkbase>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>7
<FILENAME>R1.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="include/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';
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</head>
<body>
<span style="display: none;">v3.23.3</span><table class="report" border="0" cellspacing="2" id="idm140273336304256">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Document And Entity Information<br></strong></div></th>
<th class="th"><div>Nov. 29, 2023</div></th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_CoverAbstract', window );"><strong>Cover [Abstract]</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="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="Show.showAR( this, 'defref_dei_AmendmentFlag', window );">Amendment Flag</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="Show.showAR( this, 'defref_dei_DocumentPeriodEndDate', window );">Document Period End Date</a></td>
<td class="text">Nov. 29,  2023<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityRegistrantName', window );">Entity Registrant Name</a></td>
<td class="text">ARCA biopharma, Inc.<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityCentralIndexKey', window );">Entity Central Index Key</a></td>
<td class="text">0000907654<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityEmergingGrowthCompany', window );">Entity Emerging Growth Company</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="Show.showAR( this, 'defref_dei_EntityFileNumber', window );">Entity File Number</a></td>
<td class="text">000-22873<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="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="Show.showAR( this, 'defref_dei_EntityTaxIdentificationNumber', window );">Entity Tax Identification Number</a></td>
<td class="text">36-3855489<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressAddressLine1', window );">Entity Address, Address Line One</a></td>
<td class="text">10170 Church Ranch Way<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressAddressLine2', window );">Entity Address, Address Line Two</a></td>
<td class="text">Suite 100<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressCityOrTown', window );">Entity Address, City or Town</a></td>
<td class="text">Westminster<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressStateOrProvince', window );">Entity Address, State or Province</a></td>
<td class="text">CO<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressPostalZipCode', window );">Entity Address, Postal Zip Code</a></td>
<td class="text">80021<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_CityAreaCode', window );">City Area Code</a></td>
<td class="text">(720)<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_LocalPhoneNumber', window );">Local Phone Number</a></td>
<td class="text">940-2200<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_WrittenCommunications', window );">Written Communications</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="Show.showAR( this, 'defref_dei_SolicitingMaterial', window );">Soliciting Material</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="Show.showAR( this, 'defref_dei_PreCommencementTenderOffer', window );">Pre-commencement 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="Show.showAR( this, 'defref_dei_PreCommencementIssuerTenderOffer', window );">Pre-commencement Issuer 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="Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">Common<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">ABIO<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NASDAQ<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="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="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="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="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="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Area code of city</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="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_CoverAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Cover page.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="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_CoverAbstract</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_DocumentPeriodEndDate">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period.  The format of the date is YYYY-MM-DD.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="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="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="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="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="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="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="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="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="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="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Address Line 2 such as Street or Suite number</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="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="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Name of the City or Town</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="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="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Code for the postal or zip code</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="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="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Name of the state or province.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="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_EntityCentralIndexKey">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="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="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-2<br></p></div>
<a href="javascript:void(0);" onclick="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="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Indicate if registrant meets the emerging growth company criteria.</p></div>
<a href="javascript:void(0);" onclick="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-2<br></p></div>
<a href="javascript:void(0);" onclick="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_EntityFileNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="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="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="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="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="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="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="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="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="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="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-2<br></p></div>
<a href="javascript:void(0);" onclick="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="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="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="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-2<br></p></div>
<a href="javascript:void(0);" onclick="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="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Local phone number for entity.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="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="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="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="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="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="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="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="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="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="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Title of a 12(b) registered security.</p></div>
<a href="javascript:void(0);" onclick="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="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>
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end
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
