Income Taxes - Reconciliation of Provision for Income Taxes at Statutory Rate and Provision (Benefit) for Income Taxes at Effective Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income tax at federal statutory rate	$ (22,549)	$ (20,089)	$ (10,883)
Increase (decrease) in tax resulting from:
State income tax expense, net of federal tax effect	(5,018)	(3,763)	(3,657)
Nondeductible permanent items	(87)	1,659	3,522
Executive compensation	4,885	6,020
Foreign rate differential	(1,060)	(156)	(367)
Gain on extinguishment of debt	(2,123)
Tax rate change	(1,039)
Adjustment to deferred taxes	817	(3,190)	(1,904)
Change in valuation allowance	23,262	25,339	22,481
Uncertain tax positions	165	151	128
Nonqualified stock option and performance award windfall upon exercise	(9,352)	(8,608)	(9,128)
Other	(480)	370	233
Total	$ (12,579)	$ (2,267)	$ 425