Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Operating expenses:
Research and development	$ 7,199	$ 14,719	$ 19,960	$ 31,543
General and administrative	9,059	7,064	18,116	13,553
Total operating expenses	16,258	21,783	38,076	45,096
Loss from operations	(16,258)	(21,783)	(38,076)	(45,096)
Interest income	145	160	217	387
Other expense, net	(735)	(131)	(630)	(131)
Net loss before income tax benefit	(16,848)	(21,754)	(38,489)	(44,840)
Income tax benefit	284	0	284	0
Net loss	(16,564)	(21,754)	(38,205)	(44,840)
Other comprehensive income (loss):
Foreign currency translation adjustments	250	0	137	0
Unrealized loss on available for sales securities	(210)	(72)	(524)	(196)
Total comprehensive loss	$ (16,524)	$ (21,826)	$ (38,592)	$ (45,036)
Net loss per share - basic	$ (0.51)	$ (0.74)	$ (1.22)	$ (1.52)
Net loss per share - diluted	$ (0.51)	$ (0.74)	$ (1.22)	$ (1.52)
Weighted average shares of common stock outstanding - basic	32,467,000	29,587,352	31,307,166	29,571,226
Weighted average shares of common stock outstanding - diluted	32,467,000	29,587,352	31,307,166	29,571,226