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Note 5 - Milestone Revenue Recognition (Details) (USD $)
3 Months Ended
Apr. 05, 2015
Mar. 30, 2014
Milestone Revenue Recognition [Abstract]    
Revenue Recognition, Milestone Method, Revenue Recognized $ 300,000us-gaap_RevenueRecognitionMilestoneMethodRevenueRecognized $ 1,275,000us-gaap_RevenueRecognitionMilestoneMethodRevenueRecognized