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Note 3 - Calculation of Income (Loss) Per Share (Details) - USD ($)
 3 Months Ended 9 Months Ended
Oct. 04, 2015
Sep. 28, 2014
Oct. 04, 2015
Sep. 28, 2014
Participating Securities [Member]        
Net Income (Loss) $ 500,000 $ 0 $ 1,200,000 $ 400,000
Weighted Average Shares Outstanding (in shares) 64,359,000 65,045,000 64,596,000 65,050,000
Participating Securities (in shares) 1,495,000 1,420,000 1,495,000 1,420,000
Shares for Basic Earnings (Loss) Per Share (in shares) 65,854,000 66,465,000 66,091,000 66,470,000
Dilutive Effect of Stock Options (in shares) 53,000 0 48,000 84,000
Shares for Diluted Earnings (Loss) Per Share (in shares) 65,907,000 66,465,000 66,139,000 66,554,000