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Note 8 - Segment Information - Financial Information for the Company's Reportable Segments (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Oct. 01, 2016
Oct. 03, 2015
Oct. 01, 2016
Oct. 03, 2015
Jan. 02, 2016
Retail [Member]          
Net sales to external customers $ 81,870 $ 84,303 $ 249,854 $ 256,246  
Income before income taxes 1,881 1,120 429 6,539  
Capital expenditures, net 6,321 6,753 18,178 12,800  
Depreciation and amortization 3,935 3,996 11,506 12,159  
Total assets 174,510 177,067 174,510 177,067  
Commercial [Member]          
Net sales to external customers 1,322 795 2,601 2,159  
Income before income taxes 667 182 1,080 1,003  
Capital expenditures, net 7 7  
Depreciation and amortization 1 1 2 1  
Total assets 5,968 4,765 5,968 4,765  
International Franchising [Member]          
Net sales to external customers 556 525 1,407 1,624  
Income before income taxes 248 66 316 439  
Capital expenditures, net 10 25 35 57  
Depreciation and amortization 18 32 65 102  
Total assets 2,419 1,472 2,419 1,472  
Net sales to external customers 83,748 85,623 253,862 260,029 [1],[2],[3]  
Income before income taxes 2,796 1,368 1,825 7,981  
Capital expenditures, net 6,331 6,785 18,213 12,864  
Depreciation and amortization 3,954 4,029 11,573 12,262  
Total assets $ 182,897 $ 183,304 $ 182,897 $ 183,304 $ 213,334
[1] Europe includes the United Kingdom, Ireland, Denmark and franchise businesses in Europe
[2] North America includes the United States, Canada, Puerto Rico and franchise business in Mexico
[3] Other includes franchise businesses outside of North America and Europe and, beginning in 2016, a company-owned store in China