Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Tax at federal statutory rate	$ (40,387)	$ (37,552)	$ (67,795)
State taxes, net of federal effect	107	21	26
Impact on noncontrolling interest	6,074	4,522	4,001
Elimination of acquiree deferred taxes	2,149	0	0
Non-U.S. tax effect	412	78	264
Nondeductible expenses	3,603	908	144
Stock-based compensation	5,307	5,956	6,484
Loss on debt extinguishment	0	214	0
U.S. tax on foreign earnings (GILTI)	59	203	221
Acquisition contingent liability	(762)		0
Change in valuation allowance	24,484	25,906	57,288
Provision for income taxes	$ 1,046	$ 256	$ 633

Effective Income Tax Rate Reconciliation, Acquisition Contingent Liability, Amount

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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