Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues:
Total revenues	$ 139,709	$ 1,517	$ 1,517
Type of revenue [extensible list]	us-gaap:LicenseMember	us-gaap:LicenseMember	us-gaap:LicenseMember
Operating expenses:
Research and development	$ 88,248	$ 50,435	$ 42,994
General and administrative	25,241	22,505	16,062
Total operating expenses	113,489	72,940	59,056
Income (loss) from operations	26,220	(71,423)	(57,539)
Other (expense) income:
Interest expense	(1,899)	(2,357)
Interest income	403	841	1,571
Other (expense) income:	202	(219)	(79)
Total other (expense) income	(1,294)	(1,735)	1,492
Net income (loss)	24,926	(73,158)	(56,047)
Net income (loss) attributable to common stockholders	$ 24,926	$ (77,064)	$ (56,047)
Net income (loss) Per Share:
Basic earnings (loss) per share attributable to common stockholders	$ 0.48	$ (1.87)	$ (1.84)
Diluted earnings (loss) per share attributable to common stockholders	$ 0.46	$ (1.87)	$ (1.84)
Weighted-average common shares used in calculating:
Basic earnings (loss) per share attributable to common stockholders	52,064,809	41,308,242	30,490,783
Diluted earnings (loss) per share attributable to common stockholders	53,622,904	41,308,242	30,490,783