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Income Taxes - Summary of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | --- | --- | ---
Deferred tax assets: |  |  |  |
Stock compensation expense | $ 3,394 | $ 4,631 |  |
Goodwill | 2,673 | 3,110 |  |
Royalty accruals - BJFT | 992 | 0 |  |
Bad debt allowance - BJFT | 333 | 0 |  |
Inter-company interest expense accrual - US tax | 476 | 0 |  |
Other | 637 | 2,419 |  |
Net operating loss carryforwards | 1,576 | 2,006 |  |
Credit carry-forwards | 359 | 0 |  |
Total deferred tax assets | 10,440 | 12,166 |  |
Deferred tax liabilities: |  |  |  |
Depreciation | (777) | (1,096) |  |
Intangible assets | (294) | (1,156) |  |
Other | (306) | (306) |  |
Total deferred tax liabilities | (1,377) | (2,558) |  |
Net deferred tax asset before valuation allowance | 9,063 | 9,608 |  |
Valuation allowances for deferred tax assets | (7,832) | (2,006) | $ (1,833) | $ (1,868)
Net deferred tax asset | $ 1,231 | $ 7,602 |  |

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