Quarterly report pursuant to Section 13 or 15(d)

Components of Accrued Liabilities (Detail)

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Components of Accrued Liabilities (Detail) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Jun. 30, 2016
Components of accrued liabilities      
Payroll and benefits $ 1,916 $ 2,147  
Warranty accrual, current portion 989 933 $ 1,053
Taxes 381 638  
Accrued professional services 948 782  
Accrued capital lease obligations, current portion 74 159  
Accrued insurance premium 63 906  
Other 289 213  
Total accrued liabilities $ 4,660 $ 5,778