CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive (Loss) Income	Accumulated Deficit
Balance at Dec. 31, 2020	$ 353,064	$ 7	$ 478,272	$ (112)	$ (125,103)
Balance, Shares at Dec. 31, 2020		61,931,255
Stock-based compensation	8,103		8,103
Issuance of common stock, upon vesting of restricted stock, Shares		519,839
Unrealized (loss) gain on available-for-sale securities	42			42
Foreign currency translation adjustment	83			83
Net loss	(30,923)				(30,923)
Balance at Mar. 31, 2021	330,369	$ 7	486,375	13	(156,026)
Balance, Shares at Mar. 31, 2021		62,451,094
Balance at Dec. 31, 2020	353,064	$ 7	478,272	(112)	(125,103)
Balance, Shares at Dec. 31, 2020		61,931,255
Unrealized (loss) gain on available-for-sale securities	23
Foreign currency translation adjustment	(44)
Net loss	(114,021)
Balance at Sep. 30, 2021	267,304	$ 7	506,554	(133)	(239,124)
Balance, Shares at Sep. 30, 2021		63,177,928
Balance at Mar. 31, 2021	330,369	$ 7	486,375	13	(156,026)
Balance, Shares at Mar. 31, 2021		62,451,094
Stock-based compensation	9,726		9,726
Issuance of common stock, upon vesting of restricted stock, Shares		340,949
Unrealized (loss) gain on available-for-sale securities	(16)			(16)
Foreign currency translation adjustment	(22)			(22)
Net loss	(37,588)				(37,588)
Balance at Jun. 30, 2021	302,469	$ 7	496,101	(25)	(193,614)
Balance, Shares at Jun. 30, 2021		62,792,043
Stock-based compensation	10,286		10,286
Issuance of common stock, upon vesting of restricted stock, Shares		376,460
Issuance of common stock, upon exercise of stock options	167		167
Issuance of common stock, upon exercise of stock options, Shares		9,425
Unrealized (loss) gain on available-for-sale securities	(3)			(3)
Foreign currency translation adjustment	(105)			(105)
Net loss	(45,510)				(45,510)
Balance at Sep. 30, 2021	267,304	$ 7	506,554	(133)	(239,124)
Balance, Shares at Sep. 30, 2021		63,177,928
Balance at Dec. 31, 2021	225,266	$ 7	522,479	(155)	(297,065)
Balance, Shares at Dec. 31, 2021		63,565,886
Stock-based compensation	10,467		10,467
Issuance of common stock, upon vesting of restricted stock, Shares		698,241
Unrealized (loss) gain on available-for-sale securities	(195)			(195)
Net loss	(43,863)				(43,863)
Balance at Mar. 31, 2022	191,675	$ 7	532,946	(350)	(340,928)
Balance, Shares at Mar. 31, 2022		64,264,127
Balance at Dec. 31, 2021	225,266	$ 7	522,479	(155)	(297,065)
Balance, Shares at Dec. 31, 2021		63,565,886
Unrealized (loss) gain on available-for-sale securities	(408)
Net loss	(130,574)
Balance at Sep. 30, 2022	253,226	$ 9	681,419	(563)	(427,639)
Balance, Shares at Sep. 30, 2022		92,640,109
Balance at Mar. 31, 2022	191,675	$ 7	532,946	(350)	(340,928)
Balance, Shares at Mar. 31, 2022		64,264,127
Stock-based compensation	10,951		10,951
Issuance of common stock, upon vesting of restricted stock, Shares		450,619
Purchase of common stock under the 2020 employee stock purchase plan	244		244
Purchase of common stock under the 2020 employee stock purchase plan, Shares		73,357
Unrealized (loss) gain on available-for-sale securities	(94)			(94)
Net loss	(44,639)				(44,639)
Balance at Jun. 30, 2022	158,137	$ 7	544,141	(444)	(385,567)
Balance, Shares at Jun. 30, 2022		64,788,103
Stock-based compensation	10,855		10,855
Issuance of common stock, upon vesting of restricted stock, Shares		393,911
Issuance of common stock in registered direct offering, net of issuance costs	126,425	$ 2	126,423
Issuance of common stock in registered direct offering, net of issuance costs, Shares		27,458,095
Unrealized (loss) gain on available-for-sale securities	(119)			(119)
Net loss	(42,072)				(42,072)
Balance at Sep. 30, 2022	$ 253,226	$ 9	$ 681,419	$ (563)	$ (427,639)
Balance, Shares at Sep. 30, 2022		92,640,109