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	57,286		57,286
Issuance of common stock related to at-the-market offering program, net of issuance costs, shares		3,407,872
Issuance of common stock upon exercise of stock options	355		355
Issuance of common stock upon exercise of stock options, shares		59,960
Employee stock purchase plan (ESPP) purchase	327		327
Employee stock purchase plan (ESPP) purchase, shares		28,745
Vesting of early exercised common stock options and restricted stock	21		21
Stock-based compensation	3,976		3,976
Other comprehensive loss	(11)			(11)
Net loss	(19,968)				(19,968)
Ending balance at Jun. 30, 2021	240,260	$ 3	387,215	(4)	(146,954)
Ending balance, shares at Jun. 30, 2021		33,033,793
Beginning balance at Mar. 31, 2021	233,125	$ 3	369,130	(1)	(136,007)
Beginning balance, shares at Mar. 31, 2021		32,270,538
Issuance of common stock related to at-the-market offering program, net of issuance costs	15,454		15,454
Issuance of common stock related to at-the-market offering program, net of issuance costs, shares		695,218
Issuance of common stock upon exercise of stock options	243		243
Issuance of common stock upon exercise of stock options, shares		39,292
Employee stock purchase plan (ESPP) purchase	327		327
Employee stock purchase plan (ESPP) purchase, shares		28,745
Vesting of early exercised common stock options and restricted stock	3		3
Stock-based compensation	2,058		2,058
Other comprehensive loss	(3)			(3)
Net loss	(10,947)				(10,947)
Ending balance at Jun. 30, 2021	240,260	$ 3	387,215	(4)	(146,954)
Ending balance, shares at Jun. 30, 2021		33,033,793
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	(75)		(75)
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	784		784
Issuance of common stock upon exercise of stock options, shares		122,913
Employee stock purchase plan (ESPP) purchase	435		435
Employee stock purchase plan (ESPP) purchase, shares		45,879
Stock-based compensation	5,649		5,649
Other comprehensive loss	(2,917)			(2,917)
Net loss	(36,069)				(36,069)
Ending balance at Jun. 30, 2022	269,321	$ 4	485,763	(3,629)	(212,817)
Ending balance, shares at Jun. 30, 2022		38,704,010
Beginning balance at Mar. 31, 2022	288,667	$ 4	482,228	(2,804)	(190,761)
Beginning balance, shares at Mar. 31, 2022		38,639,922
Issuance of common stock related to at-the-market offering program, net of issuance costs	(66)		(66)
Issuance of common stock upon exercise of stock options	122		122
Issuance of common stock upon exercise of stock options, shares		18,209
Employee stock purchase plan (ESPP) purchase	435		435
Employee stock purchase plan (ESPP) purchase, shares		45,879
Stock-based compensation	3,044		3,044
Other comprehensive loss	(825)			(825)
Net loss	(22,056)				(22,056)
Ending balance at Jun. 30, 2022	$ 269,321	$ 4	$ 485,763	$ (3,629)	$ (212,817)
Ending balance, shares at Jun. 30, 2022		38,704,010