Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Thousands |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Fair Value Measurements Of Financial Instruments [Line Items] | ||
| Book value of debt | $ 133,916 | |
| Fair value of debt | 58,123 | $ 75,446 |
| Fair value of capital lease | 8,386 | 9,214 |
| Book Value [Member] | ||
| Fair Value Measurements Of Financial Instruments [Line Items] | ||
| Book value of debt | 58,123 | 75,446 |
| Book value of capital lease | 6,342 | 6,854 |
| Long term legal settlement | 926 | 960 |
| Fair Value [Member] | ||
| Fair Value Measurements Of Financial Instruments [Line Items] | ||
| Long term legal settlement | $ 926 | $ 960 |