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Balance Sheets (Parentheticals) - $ / shares
Dec. 31, 2022
Dec. 25, 2021
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, authorized shares (in shares) 20,000,000 20,000,000
Common stock, issued shares (in shares) 14,460,486 14,350,786
Common stock, outstanding shares (in shares) 14,450,470 14,350,451
Treasury stock, shares (in shares) 10,016 335