Fair Value Measurements - Financial Instruments that were not Measured at Fair Value (Detail) - Level 2 - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Second Lien Term Loan, net | Carrying Amount
Fair Value, Option, Quantitative Disclosures [Line Items]
Carrying Amount	$ 0	$ 28,948
Second Lien Term Loan, net | Fair Value
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value	0	30,600
Term Loan, net | Carrying Amount
Fair Value, Option, Quantitative Disclosures [Line Items]
Carrying Amount	39,137	0
Term Loan, net | Fair Value
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value	41,500	0
Convertible Notes, net | Carrying Amount
Fair Value, Option, Quantitative Disclosures [Line Items]
Carrying Amount	20,331	18,993
Convertible Notes, net | Fair Value
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value	27,250	23,250
Senior Secured Asset-Based Loan | Carrying Amount
Fair Value, Option, Quantitative Disclosures [Line Items]
Carrying Amount	0	8,000
Senior Secured Asset-Based Loan | Fair Value
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value	$ 0	$ 8,000