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STOCKHOLDERS' EQUITY - Summary of Stock Option Activity (Detail)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2016
USD ($)
$ / shares
shares
Stock Options  
Outstanding, beginning balance (in shares) 1,297
Granted (in shares) 50
Exercised (in shares) (12)
Forfeited (in shares) (220)
Outstanding, ending balance (in shares) 1,115
Exercisable (in shares) 782
Expected to vest (in shares) 373
Weighted Average Exercise Price  
Outstanding, beginning balance (in USD per share) | $ / shares $ 7.03
Granted (in USD per share) | $ / shares 12.48
Exercised (in USD per share) | $ / shares 10.85
Forfeited (in USD per share) | $ / shares 12.64
Outstanding, ending balance (in USD per share) | $ / shares 6.13
Exercisable (in USD per share) | $ / shares 5.73
Expected to Vest (in USD per share) | $ / shares $ 7.62
Weighted Average Remaining Contractual Term, Outstanding 5 years 9 months 18 days
Weighted Average Remaining Contractual Term, Exercisable 4 years 7 months 6 days
Weighted Average Remaining Contractual Term, Unvested 8 years 8 months 6 days
Aggregate Intrinsic Value, Outstanding, Ending Balance | $ $ 7,086
Aggregate Intrinsic Value, Exercisable, Ending Balance | $ 5,293
Aggregate Intrinsic Value, Unvested, Ending Balance | $ $ 1,793
Market-based Performance Stock Options  
Weighted Average Exercise Price  
Attainment level percentage 100.00%
Additional issuance if performance targets met (in shares) 40