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Related Party Arrangements | 6 Months Ended
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Jun. 30, 2024
Related Party Transactions [Abstract] |
Related Party Arrangements | (5) Related Party Arrangements Separation of Michael Bristow, M.D., President, Chief Executive Officer and Director Effective April 3, 2024, ARCA and Dr. Michael Bristow, President, Chief Executive Officer and a member of the Board mutually agreed to conclude Dr. Bristow’s employment and service as a director. In connection with Dr. Bristow’s separation, ARCA and Dr. Bristow entered into a separation agreement (the “Separation Agreement”) on April 3, 2024. Pursuant to the terms of the Separation Agreement, ARCA provided to Dr. Bristow a lump sum payment equal to (i) twelve (12) months of Dr. Bristow’s base salary as of the last date of his employment and (ii) a cash payment of $25,000, less applicable withholdings. The severance benefits were conditioned on the non-revocation by Dr. Bristow of a legal release of claims and was paid in the second quarter of 2024. ARCA and Dr. Bristow entered into a consulting agreement, effective April 3, 2024 (the “Consulting Agreement”), pursuant to which Dr. Bristow is providing certain consulting services provided for in the Consulting Agreement to ARCA until the earlier of (i) the completion of services under the Consulting Agreement, (ii) a termination in accordance with the terms of the Consulting Agreement, and (iii) upon a Change of Control (as defined in ARCA’s 2020 Equity Incentive Plan (the “Plan”)). Pursuant to the Consulting Agreement, Dr. Bristow provision of services under the Consulting Agreement are deemed to be a Continuous Service (as defined in the Plan) and, as a result, his equity awards under the Plan continue to vest during the term of the Consulting Agreement. Transactions with the Company’s Former President and Chief Executive Officer The Company has entered into unrestricted research grants with its former President and Chief Executive Officer’s academic research laboratory at the University of Colorado. Funding of any unrestricted research grants is contingent upon the Company’s financial condition, and can be deferred or terminated at the Company’s discretion. There was no expense under these arrangements for the six months ended June 30, 2024. Total expense under these arrangements for the six months ended June 30, 2023 was $216,000. In December 2023, the Company made a payment of $125,000 for the grant period July 2022 through December 2023 under these arrangements. In April 2024, Dr. Bristow resigned, see above.

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- Definition The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480990/946-20-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480990/946-20-50-5 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480990/946-20-50-6 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477968/946-235-50-2 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477968/946-235-50-2 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(2)(g)(3)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(2)(c)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(2)(e)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 850 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/850/tableOfContent Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-6 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-1 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-1 + Details
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