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, 2019
Dec. 31, 2018
Sep. 30, 2018
Payables And Accruals [Abstract]      
Payroll and benefits $ 1,726 $ 2,400  
Patent litigation settlement   1,500  
Warranty accrual, current portion 954 861 $ 1,005
Lease liability 476    
Accrued professional services 992 1,044  
Taxes 255 714  
Accrued insurance premium   328  
Customer deposits 82 21  
Other 465 670  
Total accrued liabilities $ 4,950 $ 7,538