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Accrued Liabilities (Detail) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Payables And Accruals [Abstract]    
Accrued compensation and related costs $ 5,000 $ 7,098
Accrued professional services 3,707 2,511
Accrued customer costs 456 534
Accrued insurance premiums   476
Other accrued expenses 624 599
Total accrued liabilities $ 9,787 $ 11,218