Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenue:
Total revenue	$ 198	$ 1,362
Operating expenses:
Research and development	13,776	16,978
General and administrative	5,228	8,825
Total operating expenses	19,004	25,803
Loss from operations	(18,806)	(24,441)
Other income (expense):
Interest income	420	35
Other income (expense), net	(72)	(30)
Total other income (expense)	348	5
Loss before income tax expense	(18,458)	(24,436)
Income tax benefit (expense)	36	0
Net loss	$ (18,422)	$ (24,436)
Net loss per share, basic	$ (0.20)	$ (0.37)
Net loss per share, diluted	$ (0.20)	$ (0.37)
Weighted-average common shares outstanding, basic	94,262,660	65,996,161
Weighted-average common shares outstanding, diluted	94,262,660	65,996,161
Development Fee and Royalty [Member]
Revenue:
Total revenue	$ 198	$ 1,362