Quarterly report pursuant to Section 13 or 15(d)

Note 6 - Stock-based Compensation - Restricted Stock Transactions (Details)

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Note 6 - Stock-based Compensation - Restricted Stock Transactions (Details) - Restricted Stock [Member]
6 Months Ended
Mar. 31, 2022
$ / shares
shares
Balance, unvested shares (in shares) | shares 108,839
Balance, weighted-average grant date fair value (in dollars per share) | $ / shares $ 17.14
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | shares 29,512
Granted, weighted-average grant date fair value (in dollars per share) | $ / shares $ 65.90
Vested (in shares) | shares (14,384)
Vested, weighted-average grant date fair value (in dollars per share) | $ / shares $ 25.02
Forfeited (in shares) | shares 0
Forfeited, weighted-average grant date fair value (in dollars per share) | $ / shares $ 0
Balance, unvested shares (in shares) | shares 123,967
Balance, weighted-average grant date fair value (in dollars per share) | $ / shares $ 27.83