UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated other comprehensive income (loss )	Accumulated Deficit	Total
Beginning balance at Dec. 31, 2020	$ 1	$ 585,374		$ (488,195)	$ 97,180
Beginning balance, shares at Dec. 31, 2020	56,890,569
Net income				11,883	11,883
Issuance of common stock		29,700			29,700
Issuance of common stock, Shares	1,270,462
Exercise of stock options		1,794			1,794
Exercise of stock options, Shares	253,515
Stock-based compensation		11,461			11,461
Ending balance at Sep. 30, 2021	$ 1	628,329		(476,312)	152,018
Ending balance, shares at Sep. 30, 2021	58,414,546
Beginning balance at Jun. 30, 2021	$ 1	593,242		(466,692)	126,551
Beginning balance, shares at Jun. 30, 2021	57,000,139
Net income				(9,620)	(9,620)
Issuance of common stock		29,700			29,700
Issuance of common stock, Shares	1,270,462
Exercise of stock options		1,134			1,134
Exercise of stock options, Shares	143,945
Stock-based compensation		4,253			4,253
Ending balance at Sep. 30, 2021	$ 1	628,329		(476,312)	152,018
Ending balance, shares at Sep. 30, 2021	58,414,546
Beginning balance at Dec. 31, 2021	$ 1	640,104		(453,598)	186,507
Beginning balance, shares at Dec. 31, 2021	58,825,769
Net income				132,959	132,959
Unrealized loss on investments			$ (178)		(178)
Issuance of common stock		408			408
Issuance of common stock, Shares	8,050
Exercise of stock options		5,275			$ 5,275
Exercise of stock options, Shares	470,589				457,145
Stock-based compensation		18,913			$ 18,913
Ending balance at Sep. 30, 2022	$ 1	664,700	(178)	(320,639)	343,884
Ending balance, shares at Sep. 30, 2022	59,304,408
Beginning balance at Jun. 30, 2022	$ 1	655,143	(29)	(408,582)	246,533
Beginning balance, shares at Jun. 30, 2022	59,117,749
Net income				87,943	87,943
Unrealized loss on investments			(149)		(149)
Issuance of common stock		408			408
Issuance of common stock, Shares	8,050
Exercise of stock options		2,143			2,143
Exercise of stock options, Shares	178,609
Stock-based compensation		7,006			7,006
Ending balance at Sep. 30, 2022	$ 1	$ 664,700	$ (178)	$ (320,639)	$ 343,884
Ending balance, shares at Sep. 30, 2022	59,304,408