Income Taxes - Reconciliation of Income Tax Computed At U. S. Federal Statutory Rate to Income Tax (Benefit) Expense (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Tax at U.S. statutory rate		$ (2,589)	$ (5,084)	$ (3,821)
State taxes, net of federal benefit		135	(554)	(543)
Noncontrolling interest		(172)	(372)	(252)
Non-deductible items		544	562	564
Foreign tax expense (benefit)		1	(58)	180
Valuation allowances	$ 35,800	117	36,224	0
Uncertain tax positions		1,110	400	1,629
Officers' compensation		621	418	148
Return to provision		87	2	(458)
Other		(42)	194	75
Income tax (benefit) expense		$ (188)	$ 31,732	$ (2,478)