Consolidated statements of operations and comprehensive loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Operating expenses:
Research and development	$ 79,890	$ 44,038
General and administrative	17,944	10,005
Total operating expenses	97,834	54,043
Loss from operations	(97,834)	(54,043)
Interest and other (expense) income, net	(10,548)	1,864
Loss before income tax expense	(108,382)	(52,179)
Income tax expense	(161)	(85)
Net loss	(108,543)	(52,264)
Other comprehensive (loss) and income:
Loss on pension plans	(141)	(118)
Gain on available for sale investments	68
Comprehensive loss	$ (108,616)	$ (52,382)
Net loss per share, basic and diluted	$ (10.87)	$ (26.04)
Weighted average shares of common stock, basic and diluted	9,988,191	2,007,173