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
Sep. 30, 2016
Dec. 31, 2015
Sep. 30, 2015
Components of accrued liabilities      
Payroll and benefits $ 2,381 $ 2,303  
Warranty accrual, current portion 1,022 1,345 $ 1,276
Taxes 441 445  
Accrued professional services 1,178 681  
Accrued capital lease obligations, current portion 169 167  
Accrued insurance premium   467  
Other 263 498  
Total accrued liabilities $ 5,454 $ 5,906