Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit	Total
Stockholders' Equity, Beginning Balance at Dec. 31, 2019	$ 37	$ 412,227	$ (104)	$ (312,648)	$ 99,512
Shares, Outstanding, Beginning Balance at Dec. 31, 2019	36,865,116
Exercises of vested stock options		2,319			2,319
Exercises of vested stock options (in shares)	228,436
Vesting of restricted stock units (in shares)	170,367
Issuance of common stock under ESPP		1,279			1,279
Issuance of common stock under ESPP (in shares)	104,108
Stock based compensation expense		14,499			14,499
Net unrealized loss on available-for-sale-securities			(30)		(30)
Net income (loss)				36,741	36,741
Stockholders' Equity, Ending Balance at Dec. 31, 2020	$ 37	430,324	(134)	(275,907)	154,320
Shares, Outstanding, Ending 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)	346,551
Issuance of common stock under ESPP		918			918
Issuance of common stock under ESPP (in shares)	200,006
Stock based compensation expense		10,990			10,990
Net unrealized loss on available-for-sale-securities			(4)		(4)
Net income (loss)				(71,197)	(71,197)
Stockholders' Equity, Ending Balance at Dec. 31, 2021	$ 38	442,259	(138)	(347,104)	95,055
Shares, Outstanding, Ending Balance at Dec. 31, 2021	37,918,395
Exercises of vested stock options		629			$ 629
Exercises of vested stock options (in shares)	89,012				89,012
Vesting of restricted stock units (in shares)	456,219
Issuance of common stock under ESPP		672			$ 672
Issuance of common stock under ESPP (in shares)	150,265
Stock based compensation expense		9,153			9,153
Net unrealized loss on available-for-sale-securities			(81)		(81)
Net income (loss)				(46,408)	(46,408)
Stockholders' Equity, Ending Balance at Dec. 31, 2022	$ 38	$ 452,713	$ (219)	$ (393,512)	$ 59,020
Shares, Outstanding, Ending Balance at Dec. 31, 2022	38,613,891