Condensed Statements of Stockholders’ Equity - USD ($) $ in Thousands	Total		Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2020			35,552,795
Beginning balance at Dec. 31, 2020	$ 283,061		$ 3	$ 400,918	$ (32)	$ (117,828)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Vesting of restricted stock awards (in shares)			30,277
Vesting of restricted stock awards	2			2
Option exercises (in shares)			165,264
Option exercises	1,370			1,370
Stock-based compensation expense	2,578			2,578
Net unrealized loss on short-term investments	14				14
Net (loss) income	(22,856)					(22,856)
Ending balance (in shares) at Mar. 31, 2021			35,748,336
Ending balance at Mar. 31, 2021	$ 264,169		$ 3	404,868	(18)	(140,684)
Beginning balance (in shares) at Dec. 31, 2021	36,083,301		36,083,301
Beginning balance at Dec. 31, 2021	$ 199,059	[1]	$ 3	414,348	(201)	(215,091)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Vesting of restricted stock awards (in shares)			15,606
Vesting of restricted stock awards	1			1
Option exercises (in shares)			63,552
Option exercises	51			51
Stock-based compensation expense	3,531			3,531
Net unrealized loss on short-term investments	(749)				(749)
Net (loss) income	$ (28,100)					(28,100)
Ending balance (in shares) at Mar. 31, 2022	36,162,459		36,162,459
Ending balance at Mar. 31, 2022	$ 173,793		$ 3	$ 417,931	$ (950)	$ (243,191)

[1] The condensed balance sheet as of December 31, 2021 has been derived from the audited financial statements as of that date.