Condensed Consolidated Statements of Stockholders’ Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Beginning balance at Dec. 31, 2020	$ 146,187	$ 4	$ 309,126	$ (7)	$ (162,936)
Beginning balance (in shares) at Dec. 31, 2020		36,790,946
Increase (Decrease) in Stockholders' Equity
Issuance of common stock upon exercise of stock options and employee stock purchase plan	62		62
Issuance of common stock upon exercise of stock options and employee stock purchase plan (in shares)		35,829
Stock-based compensation expense	1,888		1,888
Unrealized gains (losses) on marketable securities	13			13
Net loss	(22,986)				(22,986)
Ending balance at Mar. 31, 2021	125,164	$ 4	311,076	6	(185,922)
Ending balance (in shares) at Mar. 31, 2021		36,826,775
Beginning balance at Dec. 31, 2021	$ 96,871	$ 4	361,133	(10)	(264,256)
Beginning balance (in shares) at Dec. 31, 2021	41,299,720	41,299,720
Increase (Decrease) in Stockholders' Equity
Issuance of common stock upon exercise of stock options and employee stock purchase plan	$ 384		384
Issuance of common stock upon exercise of stock options and employee stock purchase plan (in shares)		129,895
Stock-based compensation expense	3,244		3,244
Unrealized gains (losses) on marketable securities	(1,184)			(1,184)
Net loss	(26,914)				(26,914)
Ending balance at Mar. 31, 2022	$ 72,401	$ 4	$ 364,761	$ (1,194)	$ (291,170)
Ending balance (in shares) at Mar. 31, 2022	41,429,615	41,429,615