Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenues:
License and other revenues			$ 1,346
Expenses:
Royalties			350
Research and development	5,490	9,056	22,693	25,923
General and administrative	3,890	5,816	11,574	17,261
Impairment of licensed technology			1,355
Impairment of right-of-use lease asset			1,561
Impairment of construction-in-progress			1,792
Total expenses	9,380	14,872	39,325	43,184
Loss from operations	(9,380)	(14,872)	(37,979)	(43,184)
Gain on settlement with licensor		6,743		6,743
PPP loan payable forgiveness income		1,758		1,758
Interest income	72	7	103	35
Interest expense	(157)	(683)	(558)	(3,603)
Other income (expense)	(19)	3	(136)	(2)
Net loss	(9,484)	(7,044)	(38,570)	(38,253)
Deemed dividends related to Series A and Series B Convertible Redeemable Preferred Stock			(3,782)
Net loss attributable to Common Shareholders	$ (9,484)	$ (7,044)	$ (42,352)	$ (38,253)
Basic and diluted loss per common share	$ (1.48)	$ (1.80)	$ (7.05)	$ (9.93)
Weighted average number of common shares outstanding – basic and diluted	6,421,245	3,924,024	6,009,902	3,853,318
Other comprehensive income (loss):
Change in unrealized gains (losses) related to available-for-sale debt securities	$ (4)	$ 1	$ (11)	$ 10
Foreign currency translation adjustments	(6)	(9)	(6)	(9)
Comprehensive loss	$ (9,494)	$ (7,052)	$ (42,369)	$ (38,252)