Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Balance at Dec. 31, 2020	$ 429,845	$ 40	$ 548,327		$ (118,522)
Balance, shares at Dec. 31, 2020		39,844,522
Issuance of common stock under equity incentive plans	1,024		1,024
Issuance of common stock under equity incentive plans, shares		364,047
Stock-based compensation	1,800		1,800
Net loss	(14,185)				(14,185)
Balance at Mar. 31, 2021	418,484	$ 40	551,151		(132,707)
Balance, shares at Mar. 31, 2021		40,208,569
Balance at Dec. 31, 2021	363,049	$ 41	564,993		(201,985)
Balance, shares at Dec. 31, 2021		40,587,067
Issuance of common stock under equity incentive plans	185		185
Issuance of common stock under equity incentive plans, shares		69,565
Stock-based compensation	5,501		5,501
Unrealized loss on available-for-sale investments	(606)			$ (606)
Net loss	(24,533)				(24,533)
Balance at Mar. 31, 2022	$ 343,596	$ 41	$ 570,679	$ (606)	$ (226,518)
Balance, shares at Mar. 31, 2022		40,656,632