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Note 8 - Shareholders' Equity - Non-vested Restricted Stock Units (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares
 12 Months Ended
Sep. 27, 2023
Sep. 26, 2023
Sep. 27, 2022
Non-vested shares, Number of Shares (in shares) 73,336 73,336  
Granted, Number of Shares (in shares) 25,750 25,750 28,000
Granted, Weighted Average Grant Date Fair Value (in dollars per share) $ 2.29    
Exercised, Number of Shares (in shares) (46,336)    
Exercised, Weighted Average Grant Date Fair Value (in dollars per share) $ 1.54    
Forfeited, Number of Shares (in shares) (7,500)    
Forfeited, Weighted Average Grant Date Fair Value (in dollars per share) $ 2.29    
Non-vested shares, Number of Shares (in shares) 45,250   73,336
Minimum [Member]      
Non-vested shares at beginning of year, Weighted Average Grant Date Fair Value (in dollars per share) $ 1.54 $ 1.54  
Non-vested shares, Weighted Average Grant Date Fair Value (in dollars per share) 2.29   $ 1.54
Maximum [Member]      
Non-vested shares at beginning of year, Weighted Average Grant Date Fair Value (in dollars per share) 4.5 $ 4.5  
Non-vested shares, Weighted Average Grant Date Fair Value (in dollars per share) $ 4.5   $ 4.5