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Long-term debts, net - Scheduled Future Maturities of Total Debts (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Debt Disclosure [Abstract]    
2017 $ 4,135  
2018 2,250  
2019 2,250  
2020 34,115  
2021 10,000  
Total maturities 52,750 $ 55,000
Add: Accrued PIK interest, added to the principal 1,611 96
Less: Unamortized debts issuance costs (4,348) (4,178)
Total $ 50,013 $ 50,918