Quarterly report pursuant to Section 13 or 15(d)

8. Accrued liabilities (Tables)

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8. Accrued liabilities (Tables)
6 Months Ended
Jul. 01, 2017
Payables and Accruals [Abstract]  
Schedule of accrued liabilities
    July 1,
2017
    December 31,
2016
 
Sales tax estimates, including interest   $ 4,573     $ 4,203  
Compensation and benefits     1,147       2,431  
Accrued incentive and rebate checks     471       358  
Accrued rent     242       263  
Warranty     42       26  
Accrued payables     1,196       570  
Deferred revenue     350       227  
Other     586       810  
    $ 8,607     $ 8,888