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Income Taxes - Components of Net Deferred Tax Assets and Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Deferred tax assets:    
Net operating loss carryforwards $ 223,123 $ 166,450
Stock compensation 13,305 14,141
Operating lease liabilities 5,456 6,085
Investments 2,490 3,164
Depreciation and amortization 11,383 6,948
Interest expense 5,055 2,765
Accrued compensation 1,527 1,394
Other accrued liabilities 418 203
Other 3,355 2,062
Total deferred tax assets 266,112 203,212
Deferred tax liabilities:    
Indefinite lived intangibles (170) (3,108)
Operating lease right-of-use assets (4,668) (5,182)
Total deferred tax liabilities (4,838) (8,290)
Net deferred tax assets 261,274 194,922
Valuation allowance (261,444) (198,030)
Net deferred tax liability $ (170) $ (3,108)