Quarterly report pursuant to Section 13 or 15(d)

Note 6 - Stock-based Compensation - Stock Compensation Activity (Details)

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Note 6 - Stock-based Compensation - Stock Compensation Activity (Details) - USD ($)
6 Months Ended 12 Months Ended
Mar. 31, 2023
Sep. 30, 2022
Outstanding, Option Shares Outstanding (in shares) 98,626  
Outstanding, Weighted Average Exercise Price (in dollars per share) $ 52.00  
Outstanding, Weighted Average Remaining Contractual Term (Year) 5 years 11 months 12 days 1 year 4 months 9 days
Outstanding, Aggregate Intrinsic Value $ 104,300 $ 16,900
Awarded, Option Shares Outstanding (in shares) 24,500  
Awarded, Weighted Average Exercise Price (in dollars per share) $ 8.00  
Forfeited/Cancelled, Option Shares Outstanding (in shares) (18,801)  
Forfeited/Cancelled, Weighted Average Exercise Price (in dollars per share) $ 70.00  
Outstanding, Option Shares Outstanding (in shares) 104,325 98,626
Outstanding, Weighted Average Exercise Price (in dollars per share) $ 39.00 $ 52.00
Vested, Option Shares Outstanding (in shares) 74,000  
Vested, Weighted Average Exercise Price (in dollars per share) $ 50.00  
Vested, Weighted Average Remaining Contractual Term (Year) 4 years 10 months 20 days  
Vested, Aggregate Intrinsic Value $ 74,000  
Vested and expected to vest, Option Shares Outstanding (in shares) 104,325  
Vested and expected to vest, Weighted Average Exercise Price (in dollars per share) $ 39.00  
Vested and expected to vest,Weighted Average Remaining Contractual Term (Year) 5 years 11 months 12 days  
Vested and expected to vest, Aggregate Intrinsic Value $ 104,300