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Income Taxes - Schedule of Deferred Tax Assets (Liabilities) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Deferred tax assets:    
Accruals and reserves $ 4,315 $ 5,346
Share-based compensation expense 5,469 4,958
Alternative minimum tax credit carryforward 0 371
General business credit carryforward 4,500 3,936
State tax credits 5,500 5,500
Net operating loss carryforwards 42,146 27,269
Operating lease obligation 42,039 46,525
Amortization of intangible assets 1,073 0
Other 647 583
Deferred tax assets, gross 105,689 94,488
Valuation allowances (62,724) (36,652)
Deferred tax assets, net of valuation allowance 42,965 57,836
Deferred tax liabilities:    
Prepaid services (715) (288)
Amortization of intangible assets 0 (7,760)
Depreciation of fixed assets (5,104) (7,534)
Right-of-use assets (38,666) (43,342)
Deferred tax liabilities, gross (44,485) (58,924)
Net deferred tax liabilities $ (1,520) $ (1,088)