CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Revenue		$ 165
Operating expenses:
Research and development	$ 49,663	16,248
General and administrative	21,646	10,618
Total operating expenses	71,309	26,866
Loss from operations	(71,309)	(26,701)
Total other income, net:
Interest income	1,330	2,065
Other income, net	195	797
Net loss	$ (69,784)	$ (23,839)
Net loss per share – basic and diluted	$ (2.59)	$ (18.54)
Weighted-average common shares outstanding – basic and diluted	26,897,390	1,285,933
Comprehensive loss:
Net loss	$ (69,784)	$ (23,839)
Other comprehensive (loss) income, net of tax:
Unrealized (loss) gain on available-for-sale securities	(90)	68
Foreign currency translation adjustment	(90)
Total other comprehensive (loss) income	(180)	68
Comprehensive loss	$ (69,964)	$ (23,771)