STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Revenue:
Revenue	$ 10,831	$ 320
Operating expenses:
Research and development	102,107	72,088
General and administrative	16,086	13,088
Total operating expenses	118,193	85,176
Loss from operations	(107,362)	(84,856)
Other (expense) income:
Loss from remeasurement of development derivative liability	(21,182)	(12,507)
Interest income	14	237
Interest expense	(947)	(1,445)
Foreign exchange gain	6	6
Total other expense	(22,109)	(13,709)
Net loss before income taxes	(129,471)	(98,565)
Provision for income taxes	1,600	0
Net loss	$ (131,071)	$ (98,565)
Net loss per common share, basic (in usd per share)	$ (2.98)	$ (3.39)
Net loss per common share, diluted (in usd per share)	$ (2.98)	$ (3.39)
Weighted-average common shares outstanding, basic (in shares)	43,918,996	29,056,304
Weighted-average common shares outstanding, diluted (in shares)	43,918,996	29,056,304
Sublicense revenue
Revenue:
Revenue	$ 10,831	$ 0
Grant revenue
Revenue:
Revenue	$ 0	$ 320