STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (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, 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, net of tax	(1,602)				(1,602)
Stock-based compensation expense	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, 2022	195,437	$ 4	$ 1	531,682	(1,692)	(334,558)
Beginning balance (shares) at Dec. 31, 2022		36,496,994	11,402,037
Issuance of common stock upon exercise of stock options & vesting of RSUs	$ 28			28
Issuance of common stock upon exercise of stock options & vesting of RSUs, (shares)		17,224
Issuance of common stock upon exercise of stock options, (shares)	15,974
Unrealized gain (loss) on marketable securities, net of tax	$ 1,294				1,294
Stock-based compensation expense	6,256			6,256
Net loss	(27,718)					(27,718)
Ending balance at Mar. 31, 2023	$ 175,297	$ 4	$ 1	$ 537,966	$ (398)	$ (362,276)
Ending balance (shares) at Mar. 31, 2023		36,514,218	11,402,037