Quarterly report pursuant to Section 13 or 15(d)

Debt - Summary of Future Principal Amounts Payable (Detail)

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Debt - Summary of Future Principal Amounts Payable (Detail)
$ in Thousands
Jun. 30, 2017
USD ($)
Debt Disclosure [Abstract]  
Future principal amounts payable, Remainder of 2017 $ 895
Future principal amounts payable, 2018 722
Future principal amounts payable, Total $ 1,617