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Income Taxes - Components of (Benefit) Provision for Income Taxes (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Current income tax expense (benefit): |  |  |
Federal | $ 221 | $ 0 | $ (21)
State | 149 | 145 | 186
Foreign | 634 | 526 | 2,525
Total current | 1,004 | 671 | 2,690
Deferred income tax (benefit) expense: |  |  |
Federal | (1,363) | 238 | 229
State | (154) | 24 | 15
Foreign | 1,194 | 154 | 245
Total deferred | (323) | 416 | 489
Total income tax expense | $ 681 | $ 1,087 | $ 3,179

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