Condensed Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning balance at Dec. 31, 2020	$ 198,274	$ 3	$ 325,250	$ 7	$ (126,986)
Beginning balance, shares at Dec. 31, 2020		29,537,216
Issuance of common stock related to at-the-market offering program, net of issuance costs	41,832		41,832
Issuance of common stock related to at-the-market offering program, net of issuance costs, shares		2,712,654
Issuance of common stock upon exercise of stock options	112		112
Issuance of common stock upon exercise of stock options, shares		20,668
Vesting of early exercised common stock options and restricted stock	18		18
Stock-based compensation	1,918		1,918
Other comprehensive loss	(7)			(7)
Net loss	(9,021)				(9,021)
Ending balance at Mar. 31, 2021	233,126	$ 3	369,130		(136,007)
Ending balance, shares at Mar. 31, 2021		32,270,538
Beginning balance at Dec. 31, 2021	301,514	$ 4	478,970	(712)	(176,748)
Beginning balance, shares at Dec. 31, 2021		38,533,045
Issuance of common stock related to at-the-market offering program, net of issuance costs	(9)		(9)
Issuance of common stock related to at-the-market offering program, net of issuance costs, shares		2,173
Issuance of common stock upon exercise of stock options	662		662
Issuance of common stock upon exercise of stock options, shares		104,704
Stock-based compensation	2,605		2,605
Other comprehensive loss	(2,092)			(2,092)
Net loss	(14,013)				(14,013)
Ending balance at Mar. 31, 2022	$ 288,667	$ 4	$ 482,228	$ (2,804)	$ (190,761)
Ending balance, shares at Mar. 31, 2022		38,639,922