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Note 4 - Accounts Receivable (Tables)
3 Months Ended
Mar. 30, 2013
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
   
March 30,
2013
   
December 29,
2012
 
Billed
  $ 31,508     $ 26,600  
Accrued and unbilled
    5,358       4,761  
Work-in-progress
    13,746       13,552  
Allowance for doubtful accounts and sales discounts
    (1,113 )     (1,207 )
                 
Accounts receivable, net
  $ 49,499     $ 43,706