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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)

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