Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common stock	Additional paid-in capital	Accumulated other comprehensive income (loss)	Accumulated deficit
Beginning balance (in shares) at Dec. 31, 2021		36,234,624
Beginning balance at Dec. 31, 2021	$ 195,900	$ 5	$ 440,129	$ (414)	$ (243,820)
Common stock
Exercise of common stock options (in shares)		3,565
Exercise of common stock options	11		11
Vesting of restricted stock units (in shares)		5,000
Issuance of common stock related to ESPP (in shares)		31,341
Issuance of common stock related to ESPP	142		142
Stock-based compensation (in shares)		13,038
Stock-based compensation	3,375		3,375
Unrealized gain (loss) on investments	(1,361)			(1,361)
Net loss	(25,507)				(25,507)
Ending balance (in shares) at Mar. 31, 2022		36,287,568
Ending balance at Mar. 31, 2022	$ 172,560	$ 5	443,657	(1,775)	(269,327)
Beginning balance (in shares) at Dec. 31, 2022	36,434,297	36,434,297
Beginning balance at Dec. 31, 2022	$ 115,695	$ 5	452,503	(1,824)	(334,989)
Common stock
Vesting of restricted stock units (in shares)		23,575
Surrender of shares for taxes (in shares)		(3,903)
Issuance of common stock related to ESPP (in shares)		33,202
Issuance of common stock related to ESPP	51		51
Stock-based compensation (in shares)		24,776
Stock-based compensation	2,671		2,671
Unrealized gain (loss) on investments	648			648
Net loss	$ (20,875)				(20,875)
Ending balance (in shares) at Mar. 31, 2023	36,511,947	36,511,947
Ending balance at Mar. 31, 2023	$ 98,190	$ 5	$ 455,225	$ (1,176)	$ (355,864)