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Commitments and Contingencies - Future Annual Minimum Lease Payments under Noncancelable Operating Leases (Detail)
$ in Thousands
Dec. 31, 2016
USD ($)
Commitments And Contingencies Disclosure [Abstract]  
2017 (remaining six months) $ 1,871
2018 3,638
2019 1,666
2020 376
2021 46
Total $ 7,597