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, 2019
Dec. 31, 2018
Jun. 30, 2018
Payables And Accruals [Abstract]      
Payroll and benefits $ 1,660 $ 2,400  
Patent litigation settlement   1,500  
Warranty accrual, current portion 764 861 $ 1,138
Lease liability 565    
Accrued professional services 1,060 1,044  
Taxes 412 714  
Accrued insurance premium 44 328  
Customer deposits 19 21  
Other 375 670  
Total accrued liabilities $ 4,899 $ 7,538