Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Schedule of Future Minimum Capital Lease Payments (Detail)

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Commitments and Contingencies - Schedule of Future Minimum Capital Lease Payments (Detail) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Commitments And Contingencies Disclosure [Abstract]    
2017 (remaining) $ 12  
2018 55  
2019 33  
2020 21  
Total future minimum capital lease payments 121  
Less: amount representing interest (10)  
Total capital lease obligations 111  
Current portion of lease obligations (51) $ (36)
Capital lease obligations, net of current portion $ 60 $ 53