CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Other Comprehensive Income
Beginning Balance at Dec. 31, 2020	$ 82,170	$ 3	$ 243,830	$ (161,664)	$ 1
Beginning Balance, Shares at Dec. 31, 2020		27,325,959
Net loss	(7,102)			(7,102)
Issuance of common stock upon exercise of stock options	9		9
Issuance of common stock upon exercise of stock options, Shares		2,500
Vesting of restricted stock	(81)		(81)
Vesting of restricted stock, Shares		26,994
Stock-based compensation	521		521
Unrealized gain (loss) on short-term investments	(2)				(2)
Ending Balance at Mar. 31, 2021	75,515	$ 3	244,279	(168,766)	(1)
Ending Balance, Shares at Mar. 31, 2021		27,355,453
Beginning Balance at Dec. 31, 2020	82,170	$ 3	243,830	(161,664)	1
Beginning Balance, Shares at Dec. 31, 2020		27,325,959
Net loss	(14,164)
Unrealized gain (loss) on short-term investments	(1)
Ending Balance at Jun. 30, 2021	69,043	$ 3	244,868	(175,828)
Ending Balance, Shares at Jun. 30, 2021		27,355,454
Beginning Balance at Mar. 31, 2021	75,515	$ 3	244,279	(168,766)	(1)
Beginning Balance, Shares at Mar. 31, 2021		27,355,453
Net loss	(7,062)			(7,062)
Issuance of common stock upon exercise of stock options, Shares		1
Stock-based compensation	589		589
Unrealized gain (loss) on short-term investments	1				1
Ending Balance at Jun. 30, 2021	69,043	$ 3	244,868	(175,828)
Ending Balance, Shares at Jun. 30, 2021		27,355,454
Beginning Balance at Dec. 31, 2021	56,470	$ 3	246,166	(189,698)	(1)
Beginning Balance, Shares at Dec. 31, 2021		27,366,707
Net loss	(7,731)			(7,731)
Issuance of common stock upon exercise of stock options	21		21
Issuance of common stock upon exercise of stock options, Shares		4,781
Stock-based compensation	636		636
Unrealized gain (loss) on short-term investments	(3)				(3)
Ending Balance at Mar. 31, 2022	49,393	$ 3	246,823	(197,429)	(4)
Ending Balance, Shares at Mar. 31, 2022		27,371,488
Beginning Balance at Dec. 31, 2021	56,470	$ 3	246,166	(189,698)	(1)
Beginning Balance, Shares at Dec. 31, 2021		27,366,707
Net loss	$ (17,428)
Issuance of common stock upon exercise of stock options, Shares	4,781
Unrealized gain (loss) on short-term investments	$ (6)
Ending Balance at Jun. 30, 2022	40,457	$ 3	247,587	(207,126)	(7)
Ending Balance, Shares at Jun. 30, 2022		27,395,146
Beginning Balance at Mar. 31, 2022	49,393	$ 3	246,823	(197,429)	(4)
Beginning Balance, Shares at Mar. 31, 2022		27,371,488
Net loss	(9,697)			(9,697)
Issuance of common stock through employee stock purchase plan	84		84
Issuance of common stock through employee stock purchase plan, Shares		23,658
Stock-based compensation	680		680
Unrealized gain (loss) on short-term investments	(3)				(3)
Ending Balance at Jun. 30, 2022	$ 40,457	$ 3	$ 247,587	$ (207,126)	$ (7)
Ending Balance, Shares at Jun. 30, 2022		27,395,146