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Debt - Summary of Long-Term Debt (Detail) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Debt Disclosure [Abstract]    
Notes payable $ 25,175 $ 25,127
Total 25,175 25,127
Less current portion (2,083) 0
Long-term portion $ 23,092 $ 25,127