Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2020		64,486,246
Beginning balance at Dec. 31, 2020	$ 244,781	$ 3	$ 436,662	$ (191,884)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		1,778,130
Exercise of stock options	6,362	$ 1	6,361
Vesting of restricted stock units (in shares)		5,000
Employee stock purchase plan (in shares)		115,360
Employee stock purchase plan	2,157		2,157
Stock-based compensation	4,501		4,501
Net loss	(15,435)			(15,435)
Ending balance (in shares) at Mar. 31, 2021		66,384,736
Ending balance at Mar. 31, 2021	242,366	$ 4	449,681	(207,319)
Beginning balance (in shares) at Dec. 31, 2021		67,595,535
Beginning balance at Dec. 31, 2021	208,216	$ 4	471,820	(263,608)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		81,654
Exercise of stock options	412		412
Vesting of restricted stock units (in shares)		27,580
Employee stock purchase plan (in shares)		115,346
Employee stock purchase plan	610		610
Stock-based compensation	5,389		5,389
Net loss	(21,426)			(21,426)
Ending balance (in shares) at Mar. 31, 2022		67,820,115
Ending balance at Mar. 31, 2022	$ 193,201	$ 4	$ 478,231	$ (285,034)