Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Total
Stockholders' Equity, Beginning Balance at Dec. 31, 2020	$ 37	$ 430,324	$ (134)	$ (275,907)	$ 154,320
Shares, Outstanding, Beginning Balance at Dec. 31, 2020	37,368,027
Exercises of vested stock options	$ 1	27			28
Exercises of vested stock options (in shares)	3,811
Vesting of restricted stock units (in shares)	184,217
Stock based compensation expense		3,498			3,498
Unrealized gain (loss) on available-for-sale securities			11		11
Net loss				(21,649)	(21,649)
Stockholders' Equity, Ending Balance at Mar. 31, 2021	$ 38	433,849	(123)	(297,556)	136,208
Shares, Outstanding, Ending Balance at Mar. 31, 2021	37,556,055
Stockholders' Equity, Beginning Balance at Dec. 31, 2020	$ 37	430,324	(134)	(275,907)	154,320
Shares, Outstanding, Beginning Balance at Dec. 31, 2020	37,368,027
Unrealized gain (loss) on available-for-sale securities					8
Net loss					(51,769)
Stockholders' Equity, Ending Balance at Jun. 30, 2021	$ 38	438,300	(126)	(327,676)	110,536
Shares, Outstanding, Ending Balance at Jun. 30, 2021	37,772,219
Stockholders' Equity, Beginning Balance at Mar. 31, 2021	$ 38	433,849	(123)	(297,556)	136,208
Shares, Outstanding, Beginning Balance at Mar. 31, 2021	37,556,055
Vesting of restricted stock units (in shares)	114,412
Issuance of common stock under ESPP		580			580
Issuance of common stock under ESPP (in shares)	101,752
Stock based compensation expense		3,871			3,871
Unrealized gain (loss) on available-for-sale securities			(3)		(3)
Net loss				(30,120)	(30,120)
Stockholders' Equity, Ending Balance at Jun. 30, 2021	$ 38	438,300	(126)	(327,676)	110,536
Shares, Outstanding, Ending Balance at Jun. 30, 2021	37,772,219
Stockholders' Equity, Beginning Balance at Dec. 31, 2021	$ 38	442,259	(138)	(347,104)	95,055
Shares, Outstanding, Beginning Balance at Dec. 31, 2021	37,918,395
Exercises of vested stock options		12			12
Exercises of vested stock options (in shares)	11,484
Vesting of restricted stock units (in shares)	312,090
Stock based compensation expense		2,268			2,268
Unrealized gain (loss) on available-for-sale securities			(85)		(85)
Net loss				(21,319)	(21,319)
Stockholders' Equity, Ending Balance at Mar. 31, 2022	$ 38	444,539	(223)	(368,423)	75,931
Shares, Outstanding, Ending Balance at Mar. 31, 2022	38,241,969
Stockholders' Equity, Beginning Balance at Dec. 31, 2021	$ 38	442,259	(138)	(347,104)	$ 95,055
Shares, Outstanding, Beginning Balance at Dec. 31, 2021	37,918,395
Exercises of vested stock options (in shares)					74,496
Unrealized gain (loss) on available-for-sale securities					$ (226)
Net loss					(40,406)
Stockholders' Equity, Ending Balance at Jun. 30, 2022	$ 38	447,888	(364)	(387,510)	60,052
Shares, Outstanding, Ending Balance at Jun. 30, 2022	38,439,251
Stockholders' Equity, Beginning Balance at Mar. 31, 2022	$ 38	444,539	(223)	(368,423)	75,931
Shares, Outstanding, Beginning Balance at Mar. 31, 2022	38,241,969
Exercises of vested stock options		575			575
Exercises of vested stock options (in shares)	63,012
Vesting of restricted stock units (in shares)	32,165
Issuance of common stock under ESPP		313			313
Issuance of common stock under ESPP (in shares)	102,105
Stock based compensation expense		2,460			2,460
Unrealized gain (loss) on available-for-sale securities			(141)		(141)
Net loss				(19,087)	(19,087)
Stockholders' Equity, Ending Balance at Jun. 30, 2022	$ 38	$ 447,888	$ (364)	$ (387,510)	$ 60,052
Shares, Outstanding, Ending Balance at Jun. 30, 2022	38,439,251