STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Collaboration revenue	$ 2,911	$ 398	$ 2,911	$ 398
Operating expenses:
Research and development	7,893	14,521	19,411	41,427
General and administrative	3,282	8,173	10,217	25,469
Gain on lease modification	0	0	(133)	0
Total operating expenses	11,175	22,694	29,495	66,896
Loss from operations	(8,264)	(22,296)	(26,584)	(66,498)
Other income (expense):
Interest Expense	(841)	(444)	(2,266)	(444)
Other income (expense), net	254	7	279	(15)
Other income (expense), net	(587)	(437)	(1,987)	(459)
Net loss	$ (8,851)	$ (22,733)	$ (28,571)	$ (66,957)
Earnings per share, Basic	$ (0.04)	$ (0.11)	$ (0.13)	$ (0.31)
Earnings per share, Diluted	$ (0.04)	$ (0.11)	$ (0.13)	$ (0.31)
Weighted Average Number Of Shares Outstanding Basic	215,098,995	214,542,465	215,015,377	214,310,349
Weighted Average Number Of Diluted Shares Outstanding	215,098,995	214,542,465	215,015,377	214,310,349