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Note 4 - Stock-based Compensation (Detail) - Restricted Stock and Stock Options
3 Months Ended
Mar. 30, 2013
Dec. 31, 2011
Restricted Stock [Member]
   
Outstanding, December 29, 2012   860,325
Granted 140,940  
Vested 312,606  
Exercised 0  
Forfeited 8,697  
Canceled or expired 0  
Outstanding, March 30, 2013 679,962 860,325
Stock Options [Member]
   
Outstanding, December 29, 2012   1,155,239
Vested 0  
Exercised 0  
Forfeited 2,118  
Canceled or expired 0  
Outstanding, March 30, 2013 1,153,121 1,155,239