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
Mar. 31, 2017
Dec. 31, 2016
Mar. 31, 2016
Components of accrued liabilities      
Payroll and benefits $ 2,164 $ 2,147  
Warranty accrual, current portion 973 933 $ 1,087
Taxes 493 638  
Accrued professional services 946 782  
Accrued capital lease obligations, current portion 117 159  
Accrued insurance premium 206 906  
Other 264 213  
Total accrued liabilities $ 5,163 $ 5,778