Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Assets Relating to Capital Leases Included in Equipment (Detail)

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Commitments and Contingencies - Assets Relating to Capital Leases Included in Equipment (Detail) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Commitments And Contingencies [Line Items]    
Less: Accumulated depreciation and amortization $ (411) $ (374)
Capital lease assets, net 349 309
Furniture and Equipment    
Commitments And Contingencies [Line Items]    
Capital lease assets, gross 702 625
Software    
Commitments And Contingencies [Line Items]    
Capital lease assets, gross $ 58 $ 58