2. Liquidity and Going Concern (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended			3 Months Ended	9 Months Ended		12 Months Ended
	May 31, 2022	May 31, 2021	Jan. 31, 2021	Sep. 30, 2022	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Apr. 22, 2022	May 24, 2021	Jan. 28, 2021
Cash				$ 30,511	$ 30,511		$ 78,734
Accumlated deficit				196,087	$ 196,087		$ 141,210
Cash received from stock sale						$ 97,957
[custom:InitialNumberOfCalendarDaysToRegainCommonStockPriceCompliance]					180 days
[custom:FinancingAvailableUnderFormS3ShelfRegistrationStatement-0]				$ 94,600	$ 94,600
Maximum [Member]
Shares Issued, Price Per Share								$ 1.00
Minimum [Member]
Shares Issued, Price Per Share				$ 1.00	$ 1.00
May 122022 Sale Agreement [Member]
Aggregate future offering amount	$ 50,000			$ 49,500
Commission rate on gross proceeds of common stock sale	300.00%
Number of shares of common stock issued				350,000
Cash received from stock sale				$ 500
May 242021 [Member]
Number of shares of common stock issued		22,258,066					22,258,066
Cash received from stock sale		$ 64,500					$ 64,500
Shares Issued, Price Per Share									$ 3.10
Offering proceeds used to partially repay certain convertible promissory notes		$ 7,300					$ 7,300
January 282021 [Member]
Number of shares of common stock issued			17,530,488				17,530,488
Cash received from stock sale			$ 33,500				$ 33,500
Shares Issued, Price Per Share										$ 2.05
Offering proceeds used to partially repay certain convertible promissory notes			$ 3,800				$ 3,800