Annual report pursuant to Section 13 and 15(d)

Note 11 - Commitments and Contingencies (Details Textual)

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Note 11 - Commitments and Contingencies (Details Textual) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Nov. 30, 2016
Jan. 01, 2017
Jan. 03, 2016
Dec. 28, 2014
Operating Leases, Rent Expense   $ 2,296 $ 2,358 $ 2,175
Indemnification Agreement [Member]        
Loss Contingency Accrual   0    
Insurance Installments [Member]        
Purchase Obligation, Due in Next Twelve Months   187 218 231
Open Non-cancellable Purchase Orders for Raw Materials [Member]        
Purchase Obligation, Due in Next Twelve Months   $ 13,602 $ 13,215 $ 12,043
Head Office in Markham Ontario Canada [Member]        
Lessee Leasing Arrangements, Operating Leases, Term of Contract 5 years      
Lessee Leasing Arrangements, Operating Leases, Termination Period 3 years      
Operating Leases, Annual Rent Expense $ 125