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8. Accrued Expenses (Tables)
6 Months Ended
Jul. 02, 2016
Payables and Accruals [Abstract]  
Schedule of accrued expenses
   July 2, 2016   January 2, 2016 
Sales tax estimates, including interest  $4,147   $4,804 
Compensation and benefits   2,083    1,446 
Accrued incentive and rebate checks   274    293 
Accrued rent   188    235 
Warranty expense   33    42 
Accrued payables   258    749 
Deferred revenue   386    413 
Other   872    952 
   $8,241   $8,934