Quarterly report pursuant to Section 13 or 15(d)

14. Accrued liabilities (Tables)

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14. Accrued liabilities (Tables)
6 Months Ended
Jun. 30, 2018
Payables and Accruals [Abstract]  
Schedule of accrued liabilities
    June 30, 2018     December 30, 2017  
Sales tax estimates, including interest   $ 4,925     $ 4,563  
Compensation and benefits     612       1,061  
Deferred revenue           300  
Accrued incentive and rebate checks     53       285  
Accrued rent           77  
Accrued interest           115  
Accrued payables           129  
Other     10       31  
    $ 5,600     $ 6,561