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Note 9 - Line of Credit (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Apr. 04, 2015
Jan. 03, 2015
Feb. 20, 2009
Note 9 - Line of Credit (Details) [Line Items]      
Long-term Line of Credit $ 20.0us-gaap_LineOfCredit $ 20.0us-gaap_LineOfCredit  
Letters of Credit Outstanding, Amount 0.8us-gaap_LettersOfCreditOutstandingAmount 0.8us-gaap_LettersOfCreditOutstandingAmount  
Revolving Credit Facility [Member]      
Note 9 - Line of Credit (Details) [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity     35us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
Line of Credit Facility, Expiration Date Dec. 11, 2019    
Debt Instrument, Interest Rate, Effective Percentage 2.50%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
   
Line of Credit Facility, Remaining Borrowing Capacity 14.2us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
   
Letter of Credit [Member]      
Note 9 - Line of Credit (Details) [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity     $ 5us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_LetterOfCreditMember