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Income Taxes and Deferred Tax Asset/Liability - Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Assets related to:    
Accrued compensation and other $ 3,707 $ 3,417
Goodwill 0 1,133
Noncontrolling interests 1,687 1,648
Deferred revenue 232 312
Revaluation of put/call liabilities 11,570 11,269
Net operating loss carryforwards 22,818 26,015
Total deferred tax assets 40,014 43,794
Valuation allowance for deferred tax assets (31,718) (36,545)
Net deferred tax assets 8,296 7,249
Liabilities related to:    
Depreciation of property and equipment (7,709) (6,661)
Amortization of tax basis goodwill (1,450) 0
Other (587) (588)
Net deferred tax liabilities (9,746) (7,249)
Net total deferred tax liabilities $ (1,450) $ 0