STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (DEFICIT) (UNAUDITED) - USD ($) $ in Thousands	Total	Common Stock Voting Common Stock	Common Stock Non-voting Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning balance at Dec. 31, 2020	$ 212,183	$ 3	$ 1	$ 319,605		$ (107,426)
Beginning balance (shares) at Dec. 31, 2020		32,595,301	11,110,371
Issuance of common stock upon exercise of stock options	386			386
Issuance of common stock upon exercise of stock options, (shares)		210,274
Sale of common stock, net of offering costs	161,412	$ 1		161,411
Sale of common stock, net of offering costs, (shares)		2,583,334	291,666
Stock-based compensation expense, net of forfeitures of restricted stock awards	3,886			3,886
Net loss	(21,300)					(21,300)
Ending balance at Mar. 31, 2021	356,567	$ 4	$ 1	485,288		(128,726)
Ending balance (shares) at Mar. 31, 2021		35,388,909	11,402,037
Beginning balance at Dec. 31, 2020	212,183	$ 3	$ 1	319,605		(107,426)
Beginning balance (shares) at Dec. 31, 2020		32,595,301	11,110,371
Net loss	(48,165)
Ending balance at Jun. 30, 2021	334,361	$ 4	$ 1	489,947		(155,591)
Ending balance (shares) at Jun. 30, 2021		35,636,695	11,402,037
Beginning balance at Mar. 31, 2021	356,567	$ 4	$ 1	485,288		(128,726)
Beginning balance (shares) at Mar. 31, 2021		35,388,909	11,402,037
Issuance of common stock upon exercise of stock options	422			422
Issuance of common stock upon exercise of stock options, (shares)		247,786
Stock-based compensation expense, net of forfeitures of restricted stock awards	4,237			4,237
Net loss	(26,865)					(26,865)
Ending balance at Jun. 30, 2021	334,361	$ 4	$ 1	489,947		(155,591)
Ending balance (shares) at Jun. 30, 2021		35,636,695	11,402,037
Beginning balance at Dec. 31, 2021	285,897	$ 4	$ 1	505,723	$ (711)	(219,120)
Beginning balance (shares) at Dec. 31, 2021		36,200,299	11,402,037
Issuance of common stock upon exercise of stock options	153			153
Issuance of common stock upon exercise of stock options, (shares)		93,032
Unrealized gain (loss) on marketable securities	(1,602)				(1,602)
Stock-based compensation expense, net of forfeitures of restricted stock awards	6,829			6,829
Net loss	(29,465)					(29,465)
Ending balance at Mar. 31, 2022	261,812	$ 4	$ 1	512,705	(2,313)	(248,585)
Ending balance (shares) at Mar. 31, 2022		36,293,331	11,402,037
Beginning balance at Dec. 31, 2021	$ 285,897	$ 4	$ 1	505,723	(711)	(219,120)
Beginning balance (shares) at Dec. 31, 2021		36,200,299	11,402,037
Issuance of common stock upon exercise of stock options, (shares)	124,285
Unrealized gain (loss) on marketable securities	$ (1,583)
Net loss	(56,839)
Ending balance at Jun. 30, 2022	240,844	$ 4	$ 1	519,092	(2,294)	(275,959)
Ending balance (shares) at Jun. 30, 2022		36,369,248	11,402,037
Beginning balance at Mar. 31, 2022	261,812	$ 4	$ 1	512,705	(2,313)	(248,585)
Beginning balance (shares) at Mar. 31, 2022		36,293,331	11,402,037
Issuance of common stock upon exercise of stock options	59			59
Issuance of common stock upon exercise of stock options, (shares)		31,253
Issuance of common stock under ESPP	300			300
Issuance of common stock under ESPP, (shares)		68,080
Unrealized gain (loss) on marketable securities	19				19
Stock-based compensation expense, net of forfeitures of restricted stock awards	6,028			6,028
Stock-based compensation expense, net of forfeitures of restricted stock awards (shares)		(23,416)
Net loss	(27,374)					(27,374)
Ending balance at Jun. 30, 2022	$ 240,844	$ 4	$ 1	$ 519,092	$ (2,294)	$ (275,959)
Ending balance (shares) at Jun. 30, 2022		36,369,248	11,402,037