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Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares
Sep. 26, 2020
Dec. 28, 2019
Preferred stock par value (in dollars per share) $ 1 $ 1
Preferred stock, authorized (in shares) 5,000,000 5,000,000
Preferred stock, issued (in shares) 0 0
Preferred stock, outstanding (in shares) 0 0
Common stock, par value (in dollars per share) $ 0.05 $ 0.05
Common stock, authorized (in shares) 40,000,000 40,000,000
Common stock, issued (in shares) 16,144,966 15,826,891
Common stock, outstanding (in shares) 11,463,655 13,003,719
Treasury stock, shares (in shares) 4,681,311 2,823,172