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Note 4 - Accounts Receivable (Details) - USD ($)
$ in Thousands
Jan. 02, 2016
Jan. 03, 2015
Billed Revenues [Member]    
Accounts receivable, current $ 40,117 $ 47,318
Unbilled Revenues [Member]    
Accounts receivable, current 4,939 4,853
Work In Progress [Member]    
Accounts receivable, current 7,322 8,027
Allowance for sales discounts and doubtful accounts (1,432) (1,011)
Accounts receivable, net $ 50,946 $ 59,187