CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest in Subsidiary	Total
Beginning balance at Dec. 31, 2018	$ 20	$ 1,198,769	$ (688,653)	$ (2,138)	$ 17,011	$ 525,009
Beginning balance (in shares) at Dec. 31, 2018	203,599,892
Increase (Decrease) in Stockholders' Equity
Issuance of common stock, net of offering costs		309				309
Issuance of common stock, net of offering costs (in shares)	1,123,163
Stock-based compensation		3,880				3,880
Net income (loss)			20,421		(7,162)	13,259
Other comprehensive income (loss)				572		572
Increase in ownership in subsidiary		228			(228)
Ending balance at Dec. 31, 2019	$ 20	1,203,186	(668,232)	(1,566)	9,621	543,029
Ending balance (in shares) at Dec. 31, 2019	204,723,055
Increase (Decrease) in Stockholders' Equity
Issuance of common stock, net of offering costs	$ 0	1,683				1,683
Issuance of common stock, net of offering costs (in shares)	1,512,535
Repurchase of common stock		(14,647)				(14,647)
Repurchase of common stock (in shares)	(7,744,386)
Stock-based compensation		2,957				2,957
Net income (loss)			(9,864)		(1,665)	(11,529)
Other comprehensive income (loss)				1,357		1,357
Increase in ownership in subsidiary		(1,388)			1,388
Ending balance at Dec. 31, 2020	$ 20	1,191,791	(678,096)	(209)	9,344	$ 522,850
Ending balance (in shares) at Dec. 31, 2020	198,491,204					198,491,204
Increase (Decrease) in Stockholders' Equity
Issuance of common stock, net of offering costs	$ 2	197,919				$ 197,921
Issuance of common stock, net of offering costs (in shares)	24,646,419
Repurchase of common stock		(2,916)				$ (2,916)
Repurchase of common stock (in shares)	(452,700)					(452,700)
Stock-based compensation		14,994				$ 14,994
Stock-based sales incentive charges		118,130				118,130
Net income (loss)			(93,146)		(1,009)	(94,155)
Other comprehensive income (loss)				(1,413)		(1,413)
Ending balance at Dec. 31, 2021	$ 22	$ 1,519,918	$ (771,242)	$ (1,622)	$ 8,335	$ 755,411
Ending balance (in shares) at Dec. 31, 2021	222,684,923					222,684,923