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Note 14 - Major Vendors (Details Textual)
12 Months Ended
Dec. 31, 2016
Jan. 02, 2016
Jan. 03, 2015
Number Of Major Vendors 4 4 3
Inventory Purchases [Member] | Supplier Concentration Risk [Member]      
Concentration Risk, Percentage 73.00% 85.00% 75.00%