CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Revenue	$ 641	$ 1,222
Operating expenses:
Research and development	16,670	13,771
General and administrative	4,748	4,012
Total operating expenses	21,418	17,783
Loss from operations	(20,777)	(16,561)
Other income, net	309	47
Net loss	(20,468)	(16,514)
Other comprehensive income (loss):
Foreign currency translation gain (loss)	(201)	38
Unrealized loss on marketable securities	(710)	(50)
Total comprehensive loss	$ (21,379)	$ (16,526)
Net loss per share, basic and diluted	$ (0.69)	$ (0.66)
Weighted average number of shares used in computing net loss per share, basic and diluted	29,572,467	24,844,946