Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Beginning balance at Dec. 31, 2020	$ 202,961	$ 20	$ 326,046	$ (10)	$ (123,095)
Beginning balance, shares at Dec. 31, 2020		19,931,660
Issuance of common stock upon exercise of stock options	216		216
Issuance of common stock upon exercise of stock options, shares		103,170
Stock-based compensation	1,793		1,793
Net loss	(14,782)				(14,782)
Other comprehensive loss	7			7
Ending balance at Mar. 31, 2021	190,195	$ 20	328,055	(3)	(137,877)
Ending balance, shares at Mar. 31, 2021		20,034,830
Beginning balance at Dec. 31, 2021	125,957	$ 20	339,218	(64)	(213,217)
Beginning balance, shares at Dec. 31, 2021		20,317,204
Issuance of common stock upon exercise of stock options	29		29
Issuance of common stock upon exercise of stock options, shares		12,065
Issuance of common stock upon vesting of restricted stock units, shares		22,115
Stock-based compensation	2,512		2,512
Net loss	(25,565)				(25,565)
Other comprehensive loss	(192)			(192)
Ending balance at Mar. 31, 2022	$ 102,741	$ 20	$ 341,759	$ (256)	$ (238,782)
Ending balance, shares at Mar. 31, 2022		20,351,384