Condensed Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Total
Balances at beginning at Dec. 31, 2020	$ 4	$ 492,436	$ 58	$ (250,441)	$ 242,057
Balances at beginning (in shares) at Dec. 31, 2020	36,804,603
Issuance of common stock upon exercise of options		272			272
Issuance of common stock upon exercise of options (in shares)	46,793
Issuance of common stock under the Employee Stock Purchase Plan		484			484
Issuance of common stock under the Employee Stock Purchase Plan (shares)	43,018
Stock-based compensation		8,282			8,282
Unrealized loss on available-for-sale debt securities			(42)		(42)
Net loss				(52,450)	(52,450)
Balances at end at Jun. 30, 2021	$ 4	501,474	16	(302,891)	198,603
Balances at end (in shares) at Jun. 30, 2021	36,894,414
Balances at beginning at Mar. 31, 2021	$ 4	497,561	50	(276,216)	221,399
Balances at beginning (in shares) at Mar. 31, 2021	36,890,970
Issuance of common stock upon exercise of options		31			31
Issuance of common stock upon exercise of options (in shares)	3,444
Stock-based compensation		3,882			3,882
Unrealized loss on available-for-sale debt securities			(34)		(34)
Net loss				(26,675)	(26,675)
Balances at end at Jun. 30, 2021	$ 4	501,474	16	(302,891)	198,603
Balances at end (in shares) at Jun. 30, 2021	36,894,414
Balances at beginning at Dec. 31, 2021	$ 4	514,794	(102)	(359,767)	154,929
Balances at beginning (in shares) at Dec. 31, 2021	37,758,797
Issuance of common stock through "at-the-market" offering, net of underwriter discount and issuance costs		3,509			3,509
Issuance of common stock through "at-the-market" offering, net of underwriter discount and issuance costs (in shares)	700,000
Issuance of common stock upon exercise of options		76			76
Issuance of common stock upon exercise of options (in shares)	16,666
Issuance of common stock under the Employee Stock Purchase Plan		177			177
Issuance of common stock under the Employee Stock Purchase Plan (shares)	115,973
Stock-based compensation		9,824			9,824
Unrealized loss on available-for-sale debt securities			(559)		(559)
Net loss				(52,753)	(52,753)
Balances at end at Jun. 30, 2022	$ 4	528,380	(661)	(412,520)	115,203
Balances at end (in shares) at Jun. 30, 2022	38,591,436
Balances at beginning at Mar. 31, 2022	$ 4	522,893	(470)	(384,643)	137,784
Balances at beginning (in shares) at Mar. 31, 2022	38,591,436
Stock-based compensation		5,487			5,487
Unrealized loss on available-for-sale debt securities			(191)		(191)
Net loss				(27,877)	(27,877)
Balances at end at Jun. 30, 2022	$ 4	$ 528,380	$ (661)	$ (412,520)	$ 115,203
Balances at end (in shares) at Jun. 30, 2022	38,591,436