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Income Taxes - Significant Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]    
Reserves and accruals $ 463 $ 918
Prepaid expenses and other 958 1,086
Federal net operating losses 0 7,391
State net operating losses 0 106
Operating lease liabilities 6,385 0
Total deferred tax assets 7,806 9,501
Depreciation and amortization (25,531) (27,399)
Operating lease right-of-use assets (6,296) 0
Total deferred tax liabilities (31,827) (27,399)
Deferred tax liabilities, long-term, net $ (24,021) $ (17,898)