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Note 4 - Stock-based Compensation (Details) - Restricted Stock and Stock Options
6 Months Ended
Jun. 29, 2013
Dec. 31, 2011
Restricted Stock [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding, December 29, 2012   860,325
Granted 321,540  
Vested 395,614  
Exercised 0  
Forfeited 21,078  
Canceled or expired 0  
Outstanding, June 29, 2013 765,173 860,325
Employee Stock Option [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding, December 29, 2012   1,155,239
Granted 195,512  
Vested 0  
Exercised 19,327  
Forfeited 14,967  
Canceled or expired 41,150  
Outstanding, June 29, 2013 1,275,307 1,155,239