Stockholders' Equity - Summary of Stock Option Activity (Detail) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 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	(45)
Stock Options,Outstanding, June 30, 2016 | shares	1,252
Stock Options,Exercisable, June 30, 2016 | shares	917
Stock Options,Expected to vest, June 30, 2016 | shares	1,251
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	12.69
Weighted Average Exercise Price,Outstanding, June 30, 2016 | $ / shares	6.82
Weighted Average Exercise Price,Exercisable, June 30, 2016 | $ / shares	7.15
Weighted Average Exercise Price,Expected to vest, June 30, 2016 | $ / shares	$ 6.82
Weighted Average Remaining Contractual Term, Outstanding	5 years 2 months 12 days
Weighted Average Remaining Contractual Term, Exercisable	3 years 10 months 24 days
Weighted Average Remaining Contractual Term, Expected to vest	5 years 2 months 12 days
Aggregate Intrinsic Value,Outstanding, June 30 , 2016 | $	$ 2,715
Aggregate Intrinsic Value,Exercisable, June 30, 2016 | $	2,071
Aggregate Intrinsic Value,Expected to vest, June 30, 2016 | $	$ 2,712