Condensed Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Income	Total
Beginning balance (in shares) at Dec. 31, 2020	34,249,649
Beginning balance at Dec. 31, 2020	$ 34	$ 346,318	$ (238,891)	$ 39	$ 107,500
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options		848			848
Exercise of stock options (in shares)	163,151
Issuance of common stock upon release of restricted stock units (in shares)	25,490
Stock-based compensation		3,533			3,533
Net loss			(10,694)		(10,694)
Unrealized loss on investments, net				(33)	(33)
Ending balance (in shares) at Mar. 31, 2021	34,438,290
Ending balance at Mar. 31, 2021	$ 34	350,699	(249,585)	$ 6	101,154
Beginning balance (in shares) at Dec. 31, 2021	34,980,896
Beginning balance at Dec. 31, 2021	$ 35	367,907	(288,702)		79,240
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options		168			$ 168
Exercise of stock options (in shares)	35,453				35,453
Issuance of common stock upon release of restricted stock units (in shares)	57,253
Stock-based compensation		4,978			$ 4,978
Net loss			(16,679)		(16,679)
Ending balance (in shares) at Mar. 31, 2022	35,073,602
Ending balance at Mar. 31, 2022	$ 35	$ 373,053	$ (305,381)		$ 67,707