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Long Term Debt - Schedule of Annual Principal and Interest Payments Due Under Term Loan (Detail)
$ in Thousands
Jun. 30, 2016
USD ($)
Long-term Debt, Fiscal Year Maturity [Abstract]  
2016 (remaining six months) $ 477
2017 5,018
2018 5,541
2019 5,224
2020 2,190
Total 18,450
Less interest (1,946)
Less final payment (1,350)
Total $ 15,154