Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit	Total
Balances, at Beginning of period at Dec. 31, 2020	$ 3	$ 371,228		$ (33,094)	$ 338,137
Balances, at Beginning of period (in shares) at Dec. 31, 2020	39,308,238
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Vesting of early exercised stock options		341			341
Vesting of early exercised stock options (in shares)	72,618
Vesting of restricted stock awards (in shares)	192,790
Exercise of stock options		187			187
Exercise of stock options (in shares)	83,767
Issuance of shares under the employee stock purchase plan		386			386
Issuance of shares under the employee stock purchase plan (in shares)	23,885
Stock-based compensation expense		11,140			11,140
Employee stock purchase plan expense		146			146
Net unrealized (loss) gain on marketable securities			$ 15		15
Net loss				(49,458)	(49,458)
Balances, at End of period at Sep. 30, 2021	$ 3	383,428	15	(82,552)	300,894
Balances, at End of period (in shares) at Sep. 30, 2021	39,681,298
Balances, at Beginning of period at Jun. 30, 2021	$ 3	378,934	(14)	(64,839)	314,084
Balances, at Beginning of period (in shares) at Jun. 30, 2021	39,552,588
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Vesting of early exercised stock options		280			280
Vesting of early exercised stock options (in shares)	58,639
Vesting of restricted stock awards (in shares)	49,318
Exercise of stock options		57			57
Exercise of stock options (in shares)	20,753
Stock-based compensation expense		4,125			4,125
Employee stock purchase plan expense		32			32
Net unrealized (loss) gain on marketable securities			29		29
Net loss				(17,713)	(17,713)
Balances, at End of period at Sep. 30, 2021	$ 3	383,428	15	(82,552)	300,894
Balances, at End of period (in shares) at Sep. 30, 2021	39,681,298
Balances, at Beginning of period at Dec. 31, 2021	$ 3	388,904	(149)	(104,190)	284,568
Balances, at Beginning of period (in shares) at Dec. 31, 2021	39,797,263
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Vesting of early exercised stock options		93			$ 93
Vesting of early exercised stock options (in shares)	20,969				109,896
Vesting of restricted stock awards (in shares)	147,955				147,955
Exercise of stock options		146			$ 146
Exercise of stock options (in shares)	87,490				108,459
Issuance of shares under the employee stock purchase plan		57			$ 57
Issuance of shares under the employee stock purchase plan (in shares)	30,891
Stock-based compensation expense		13,704			13,704
Employee stock purchase plan expense		264			264
Net unrealized (loss) gain on marketable securities			(2,525)		(2,525)
Net loss				(78,608)	(78,608)
Balances, at End of period at Sep. 30, 2022	$ 3	403,168	(2,674)	(182,798)	217,699
Balances, at End of period (in shares) at Sep. 30, 2022	40,084,568
Balances, at Beginning of period at Jun. 30, 2022	$ 3	398,756	(2,398)	(160,078)	236,283
Balances, at Beginning of period (in shares) at Jun. 30, 2022	39,974,459
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Vesting of early exercised stock options		31			31
Vesting of early exercised stock options (in shares)	6,990
Vesting of restricted stock awards (in shares)	49,318
Exercise of stock options		106			106
Exercise of stock options (in shares)	53,801
Stock-based compensation expense		4,207			4,207
Employee stock purchase plan expense		68			68
Net unrealized (loss) gain on marketable securities			(276)		(276)
Net loss				(22,720)	(22,720)
Balances, at End of period at Sep. 30, 2022	$ 3	$ 403,168	$ (2,674)	$ (182,798)	$ 217,699
Balances, at End of period (in shares) at Sep. 30, 2022	40,084,568