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Debt - Long- Term Debt (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Debt Instrument [Line Items]    
Capital lease obligations $ 23 $ 94
Total debt 92,055 96,431
Less current portion (2,263) (8,071)
Long-term Debt and Capital Lease Obligations 89,792 88,360
Unamortized Discount and Debt Issuance Costs (5,032) (7,059)
Revolving Credit Facility | Senior Secured Asset-Backed    
Debt Instrument [Line Items]    
Debt 0 8,000
Unamortized Discount and Debt Issuance Costs 0 $ 0
Weighted average interest rate   2.41%
Senior Debt | Term Loan    
Debt Instrument [Line Items]    
Debt 39,500 $ 0
Unamortized Discount and Debt Issuance Costs $ (363) 0
Interest Rate 2.62%  
Subordinated Debt | Second Lien Term Loan    
Debt Instrument [Line Items]    
Debt $ 0 30,000
Unamortized Discount and Debt Issuance Costs 0 $ (1,052)
Interest Rate   5.75%
Convertible Notes | 8% Convertible Notes    
Debt Instrument [Line Items]    
Debt 25,000 $ 25,000
Unamortized Discount and Debt Issuance Costs $ (4,669) (6,007)
Interest Rate 8.00%  
Convertible Notes | Convertible Note Derivative Liability    
Debt Instrument [Line Items]    
Debt $ 27,532 33,337
Unamortized Discount and Debt Issuance Costs $ 0 $ 0