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Stockholders' Equity - Summary of Stock Option Activity (Detail)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2016
USD ($)
$ / shares
shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Stock Options,Outstanding, December 31, 2015 | shares 1,297
Stock Options, Granted | shares 0
Stock Options, Exercised | shares 0
Stock Options, Forfeited | shares (30)
Stock Options,Outstanding, March 31, 2016 | shares 1,267
Stock Options,Exercisable, March 31, 2016 | shares 932
Stock Options,Expected to vest, March 31, 2016 | shares 1,266
Weighted Average Exercise Price,Outstanding, December 31, 2015 | $ / shares $ 7.03
Weighted Average Exercise Price, Granted | $ / shares 0
Weighted Average Exercise Price, Exercised | $ / shares 0
Weighted Average Exercise Price, Forfeited | $ / shares 11.24
Weighted Average Exercise Price,Outstanding, March 31, 2016 | $ / shares 6.93
Weighted Average Exercise Price,Exercisable, March 31, 2016 | $ / shares 7.29
Weighted Average Exercise Price,Expected to vest, March 31, 2016 | $ / shares $ 6.93
Weighted Average Remaining Contractual Term, Outstanding 5 years 4 months 24 days
Weighted Average Remaining Contractual Term, Exercisable 4 years 1 month 6 days
Weighted Average Remaining Contractual Term, Expected to vest 5 years 4 months 24 days
Aggregate Intrinsic Value,Outstanding, March 31, 2016 | $ $ 1,717
Aggregate Intrinsic Value,Exercisable, March 31, 2016 | $ 1,388
Aggregate Intrinsic Value,Expected to vest, March 31, 2016 | $ $ 1,715