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Note 9 - Commitments and Contingencies (Tables)
12 Months Ended
Dec. 26, 2015
Notes Tables  
Operating Leases of Lessee Disclosure [Table Text Block]
(in thousands)
 
2016
   
2017
   
2018
   
2019
   
2020
   
Thereafter
   
Total
 
Non-cancelable operating leases
  $ 3,639     $ 2,628     $ 2,389     $ 2,404     $ 2,453     $ 11,901     $ 25,414