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Note 9 - Segment Information (Details) - Sales to External Customers and Long-lived Assets by Geographic Area (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 27, 2014
Sep. 28, 2013
Sep. 27, 2014
Sep. 28, 2013
Dec. 28, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales to external customers $ 86,661 $ 84,812 $ 260,852 $ 270,979  
Property and equipment, net 61,031 69,562 61,031 69,562 70,163
North America [Member]
          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales to external customers 68,067 [1] 66,870 [1] 209,400 [1] 219,776 [1]  
Property and equipment, net 54,284 [1] 61,341 [1] 54,284 [1] 61,341 [1]  
Europe [Member]
          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales to external customers 18,247 [2] 17,484 [2] 50,422 [2] 49,820 [2]  
Property and equipment, net 6,747 [2] 8,221 [2] 6,747 [2] 8,221 [2]  
Other Geographic Region [Member]
          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales to external customers 347 [3] 458 [3] 1,030 [3] 1,383 [3]  
Property and equipment, net    [3]    [3]    [3]    [3]  
[1] North America includes the United States, Canada, Puerto Rico and franchise business in Mexico
[2] Europe includes the United Kingdom, Ireland and franchise businesses in Europe
[3] Other includes franchise businesses outside of North America and Europe