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Property and Equipment - Additional Information (Detail) - USD ($) $ in Thousands |  |  | 3 Months Ended
--- | --- | --- | ---
Feb. 17, 2017 | Jan. 06, 2017 | Mar. 31, 2017 | Mar. 31, 2016
Depreciation and Other Amortization Expenses [Line Items] |  |  |  |
Depreciation and amortization expense |  |  | $ 400 | $ 600
Cash received from property, plant and equipment |  |  | $ 16,651 | $ 17
Land, Buildings and Improvements | California |  |  |  |
Depreciation and Other Amortization Expenses [Line Items] |  |  |  |
Amount of divestiture of long-lived |  | $ 17,300 |  |
Cash received from property, plant and equipment | $ 17,300 |  |  |
Net cash received from property, plant and equipment |  | 16,700 |  |
Payments for commissions and other fees |  | $ 600 |  |

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