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Note 4 - Accounts Receivable, Transit Accounts Receivable and Transit Accounts Payable (Tables)
9 Months Ended
Oct. 01, 2016
Notes Tables  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
   
October 1,
2016
   
January 2,
2016
 
Billed
  $ 32,451     $ 40,117  
Accrued and unbilled
    5,859       4,939  
Work-in-progress
    5,969       7,322  
Allowance for doubtful accounts
    (1,354
)
    (1,432
)
                 
Accounts receivable, net
  $ 42,925     $ 50,946