Note 11 - Earnings Per Share and Dividends Per Share - Schedule of Weighted Average Number Shares (Details) - shares	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Weighted average common stock outstanding, basic (in shares)	7,676,099	7,574,360	7,674,134	7,573,397
Dilutive impact of RSUs (in shares)	24,104	36,369	10,111	21,603
Weighted average common stock outstanding, diluted (in shares)	7,700,203	7,610,729	7,684,245	7,595,000