6. Common Stock Offerings (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended				2 Months Ended	3 Months Ended		12 Months Ended
	Jan. 31, 2022	Nov. 30, 2021	May 31, 2021	Jan. 31, 2021	Dec. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	May 24, 2021	Jan. 28, 2021
Business Acquisition [Line Items]
Cash received from stock sale							$ 33,481
Research and Development Expense						$ 10,009	$ 14,112
I X License Agreement [Member]
Business Acquisition [Line Items]
Research and Development Expense		$ 9,000
[custom:NonrefundableCashPayment]	$ 1,200	$ 3,500
[custom:Issuanceofcommonstockforlicenseacquiredshares]		2,570,266
[custom:MinimumStockValueOfSharesIssued]		$ 5,500
[custom:InitialStockValuationShortfallFrom5.5MillionValue]					$ 800
May 242021 [Member]
Business Acquisition [Line Items]
Number of shares of common stock issued			22,258,066					22,258,066
Shares Issued, Price Per Share									$ 3.10
Cash received from stock sale			$ 64,500					$ 64,500
Offering proceeds used to partially repay certain convertible promissory notes			$ 7,300					$ 7,300
January 282021 [Member]
Business Acquisition [Line Items]
Number of shares of common stock issued				17,530,488				17,530,488
Shares Issued, Price Per Share										$ 2.05
Cash received from stock sale				$ 33,500				$ 33,500
Offering proceeds used to partially repay certain convertible promissory notes				$ 3,800				$ 3,800