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Stock-Based Compensation and Employee Benefit Plans - Summary of the Activity under the Picor Stock Option Plans (Detail) - Picor Plan [Member] - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2014
Dec. 31, 2015
Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Options Outstanding, Beginning balance   9,870,067  
Options Outstanding, Granted   82,000  
Options Outstanding, Forfeited and expired   (8,000)  
Options Outstanding, Exercised   (219,000)  
Options Outstanding, Ending balance 9,870,067 9,725,067  
Options Outstanding, Exercisable 6,643,377 8,053,490 5,869,044
Options Outstanding, Vested or expected to vest   9,668,334  
Weighted Average Exercise Price, Beginning balance   $ 0.62  
Weighted Average Exercise Price, Granted   1.09  
Weighted Average Exercise Price, Forfeited and expired   0.75  
Weighted Average Exercise Price, Exercised   0.76  
Weighted Average Exercise Price, Ending balance $ 0.62 0.62  
Weighted Average Exercise Price, Exercisable $ 0.67 0.64 $ 0.69
Weighted Average Exercise Price, Vested or expected to vest   $ 0.62  
Weighted-Average Remaining Contractual Life in Years, Outstanding   5 years 4 days  
Weighted-Average Remaining Contractual Life in Years, Exercisable   4 years 5 months 23 days  
Weighted-Average Remaining Contractual Life in Years, Vested or expected to vest   4 years 11 months 27 days  
Aggregate Intrinsic Value, Outstanding   $ 4,520  
Aggregate Intrinsic Value, Exercisable   3,594  
Aggregate Intrinsic Value, Vested or expected to vest   $ 4,488