CONDENSED CONSOLIDATED STATEMENTS OF CONTINGENTLY REDEEMABLE COMMON STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Noncontrolling Interests	Contingently Redeemable Common Stock
Beginning balance at Dec. 31, 2020	$ (284,730)	$ 2,494	$ 263,966	$ (551,190)
Contingently Redeemable Common Stock, Beginning balance, shares at Dec. 31, 2020						76,201
Contingently Redeemable Common Stock, Beginning balance at Dec. 31, 2020						$ 309,500
Beginning balance, shares at Dec. 31, 2020		249,374
Net income (loss)	(15,151)			(15,078)	$ (73)
Exercise of stock options and other, net	165		165
Exercise of stock options and other, net, shares		100
Stock-based compensation expense	1,472		1,472
Ending balance at Mar. 31, 2021	(298,244)	$ 2,494	265,603	(566,268)	(73)
Contingently Redeemable Common Stock, Ending balance, shares at Mar. 31, 2021						76,201
Contingently Redeemable Common Stock, Ending balance at Mar. 31, 2021						$ 309,500
Ending balance, shares at Mar. 31, 2021		249,474
Beginning balance at Dec. 31, 2021	$ 1,091,596	$ 4,001	2,045,572	(957,677)	(300)
Beginning balance, shares at Dec. 31, 2021	400,095	400,095
Net income (loss)	$ 1,155			1,230	(75)
Exercise of stock options and other, net	14,756	$ 56	14,700
Exercise of stock options and other, net, shares		5,632
Stock-based compensation expense	3,970		3,970
Ending balance at Mar. 31, 2022	$ 1,111,477	$ 4,057	$ 2,064,242	$ (956,447)	$ (375)
Ending balance, shares at Mar. 31, 2022	405,727	405,727