STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Gain (Loss)
Beginning Balance at Dec. 31, 2020	$ 289,776	$ 4	$ 456,196	$ (166,393)	$ (31)
Beginning Balance (in shares) at Dec. 31, 2020		36,672,415
Exercise of common stock options	16		16
Exercise of common stock options (in shares)		18,411
Stock-based compensation expense	2,744		2,744
Unrealized (loss) gain on investments	48				48
Net loss	(16,509)			(16,509)
Ending Balance at Mar. 31, 2021	276,075	$ 4	458,956	(182,902)	17
Ending Balance (in shares) at Mar. 31, 2021		36,690,826
Beginning Balance at Dec. 31, 2020	289,776	$ 4	456,196	(166,393)	(31)
Beginning Balance (in shares) at Dec. 31, 2020		36,672,415
Unrealized (loss) gain on investments	34
Ending Balance at Jun. 30, 2021	$ 258,323	$ 4	462,227	(203,911)	3
Ending Balance (in shares) at Jun. 30, 2021	36,715,612
Beginning Balance at Mar. 31, 2021	$ 276,075	$ 4	458,956	(182,902)	17
Beginning Balance (in shares) at Mar. 31, 2021		36,690,826
Exercise of common stock options	58		58
Exercise of common stock options (in shares)		24,786
Stock-based compensation expense	3,213		3,213
Unrealized (loss) gain on investments	(14)				(14)
Net loss	(21,009)			(21,009)
Ending Balance at Jun. 30, 2021	$ 258,323	$ 4	462,227	(203,911)	3
Ending Balance (in shares) at Jun. 30, 2021	36,715,612
Beginning Balance at Dec. 31, 2021	$ 272,976	$ 4	518,183	(245,108)	(103)
Beginning Balance (in shares) at Dec. 31, 2021	39,430,120	39,430,120
Exercise of common stock options	$ 16		16
Exercise of common stock options (in shares)		8,482
Stock-based compensation expense	3,945		3,945
Unrealized (loss) gain on investments	(699)				(699)
Net loss	(23,159)			(23,159)
Ending Balance at Mar. 31, 2022	253,079	$ 4	522,144	(268,267)	(802)
Ending Balance (in shares) at Mar. 31, 2022		39,438,602
Beginning Balance at Dec. 31, 2021	$ 272,976	$ 4	518,183	(245,108)	(103)
Beginning Balance (in shares) at Dec. 31, 2021	39,430,120	39,430,120
Exercise of common stock options (in shares)	46,889
Unrealized (loss) gain on investments	$ (1,128)
Ending Balance at Jun. 30, 2022	$ 236,870	$ 4	526,651	(288,554)	(1,231)
Ending Balance (in shares) at Jun. 30, 2022	39,575,454	39,575,454
Beginning Balance at Mar. 31, 2022	$ 253,079	$ 4	522,144	(268,267)	(802)
Beginning Balance (in shares) at Mar. 31, 2022		39,438,602
Issuance of common stock under the Employee Stock Purchase Plan	354		354
Issuance of common stock under the Employee Stock Purchase Plan (in shares)		98,445
Exercise of common stock options	61		61
Exercise of common stock options (in shares)		38,407
Stock-based compensation expense	4,092		4,092
Unrealized (loss) gain on investments	(429)				(429)
Net loss	(20,287)			(20,287)
Ending Balance at Jun. 30, 2022	$ 236,870	$ 4	$ 526,651	$ (288,554)	$ (1,231)
Ending Balance (in shares) at Jun. 30, 2022	39,575,454	39,575,454