STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Collaboration revenue	$ 2,922	$ 398
Operating expenses:
Research and development	25,018	49,643
General and administrative	13,142	27,564
Gain on lease modification	(133)	0
Property and equipment and right-of-use assets impairment	0	740
Total operating expenses	38,027	77,947
Loss from operations	(35,105)	(77,549)
Other income (expense):
Interest expense	(3,154)	(1,189)
Other income (expense), net	529	(13)
Other income (expense), net	(2,625)	(1,202)
Net loss	$ (37,730)	$ (78,751)
Earnings per share, Basic	$ (0.17)	$ (0.37)
Earnings per share, Diluted	$ (0.17)	$ (0.37)
Weighted average common shares outstanding, basic	217,130,311	214,399,074
Weighted average common shares outstanding, diluted	217,130,311	214,399,074