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Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares
Jun. 27, 2021
Sep. 27, 2020
Preferred stock, par value (in dollars per share) $ 0 $ 0
Preferred stock, shares authoritzed (in shares) 500,000 500,000
Preferred stock, shares issued (in shares) 0 0
Common Class A [Member]    
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 12,000,000 12,000,000
Common stock, shares issued (in shares) 5,889,000 5,835,000
Common stock, shares outstanding (in shares) 5,889,000 5,835,000
Common Class B [Member]    
Common stock, par value (in dollars per share) $ 2 $ 2
Common stock, shares authorized (in shares) 3,000,000 3,000,000
Common stock, shares issued (in shares) 0 0