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Stockholders' Equity - Summary of Stock Option Activity (Detail) - Jun. 30, 2015 - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
Total
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Stock Options,Outstanding, December 31, 2014 1,380
Stock Options, Granted 0
Stock Options, Exercised 0
Stock Options, Forfeited (132)
Stock Options,Outstanding, June 30, 2015 1,248
Stock Options,Exercisable, June 30, 2015 726
Stock Options,Expected to vest, June 30, 2015 1,247
Weighted Average Exercise Price, Outstanding, December 31, 2014 $ 7.70
Weighted Average Exercise Price, Granted 0
Weighted Average Exercise Price, Exercised 0
Weighted Average Exercise Price, Forfeited 12.02
Weighted Average Exercise Price,Outstanding, June 30, 2015 7.25
Weighted Average Exercise Price,Exercisable, June 30, 2015 9.13
Weighted Average Exercise Price,Expected to vest, June 30, 2015 $ 7.25
Weighted Average Remaining Contractual Term, Outstanding 5 years 3 months 18 days
Weighted Average Remaining Contractual Term, Exercisable 3 years 2 months 12 days
Weighted Average Remaining Contractual Term, Expected to vest 5 years 3 months 18 days
Aggregate Intrinsic Value, Outstanding, June 30, 2015 $ 903
Aggregate Intrinsic Value, Exercisable, June 30, 2015 383
Aggregate Intrinsic Value, Expected to vest, June 30, 2015 $ 902