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Note 3 - Distributed and Undistributed Earnings (Details) - $ / shares
3 Months Ended 9 Months Ended
Oct. 04, 2015
Sep. 28, 2014
Oct. 04, 2015
Sep. 28, 2014
Basic Earnings (Loss) Per Share        
Distributed Earnings (in dollars per share) $ 0.05 $ 0.03 $ 0.13 $ 0.10
Undistributed Earnings (in dollars per share) 0.26 (0.04) 0.69 0.15
Total (in dollars per share) 0.31 (0.01) 0.82 0.25
Diluted Earnings (Loss) Per Share        
Distributed Earnings (in dollars per share) 0.05 0.03 0.13 0.10
Undistributed Earnings (in dollars per share) 0.26 (0.04) 0.69 0.15
Total (in dollars per share) 0.31 (0.01) 0.82 0.25
Total (in dollars per share) $ 0.31 $ (0.01) $ 0.82 $ 0.25