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Significant Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Deferred tax assets: |  |
Reserves and accruals | $ 568 | $ 537
Total gross deferred tax assets | 568 | 537
Deferred tax liabilities: |  |
Prepaid expenses and other | (132) | 122
Depreciation and amortization | (15,480) | (15,164)
Total gross deferred tax liabilities | (15,612) | (15,042)
Noncurrent deferred tax liabilities, net | $ (15,044) | $ (14,505)

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