Note 10 - Earnings Per Common Share - Computation of Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Net income	$ 8,376	$ 12,679
Common shares used in basic earnings per share (in shares)	12,753,378	13,251,360
Common share equivalents outstanding related to RSUs (in shares)	124,009	209,156
Total weighted average common shares and common share equivalents used in diluted earnings per share (in shares)	12,877,387	13,460,516
Basic (in dollars per share)	$ 0.66	$ 0.96
Diluted (in dollars per share)	$ 0.65	$ 0.94