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Note 8 - Segment Information (Details) - Sales to External Customers and Long-lived Assets by Geographic Area (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 28, 2014
Jun. 29, 2013
Jun. 28, 2014
Jun. 29, 2013
Dec. 28, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales to external customers $ 76,248 $ 81,902 $ 174,189 $ 186,167  
Property and equipment, net 63,185 68,273 63,185 68,273 70,163
North America [Member]
          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales to external customers 61,503 [1] 66,701 [1] 141,332 [1] 152,907 [1]  
Property and equipment, net 55,881 [1] 60,042 [1] 55,881 [1] 60,042 [1]  
Europe [Member]
          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales to external customers 14,424 [2] 14,752 [2] 32,175 [2] 32,335 [2]  
Property and equipment, net 7,304 [2] 8,231 [2] 7,304 [2] 8,231 [2]  
Other Geographic Region [Member]
          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales to external customers 321 [3] 449 [3] 682 [3] 925 [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