Subsequent Events	3 Months Ended
Mar. 31, 2023
Subsequent Events [Abstract]
Subsequent Events	14. Subsequent Events On May 11, 2023, the Company entered into the Asset Purchase Agreement with an investor group which includes the Company's CEO, Buyer Parent and Buyer. Pursuant to the terms of the Asset Purchase Agreement and subject to the approval by the Company's shareholders, the Company will receive proceeds of $8 million as cash consideration, reimbursement for certain operating expenses related to zagociguat and CY3018 for the period between signing and closing of the transaction and 10% of all of Buyer Parent's outstanding equity securities upon the successful closing of the transaction. The Company will also receive net proceeds of $5 million pursuant to a stock purchase agreement with the Company's CEO, which will take place six business days after the signing of the Asset Purchase Agreement.

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI https://asc.fasb.org/topic&trid=2122774

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662

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