Note 17 - Income (Loss) Per Common Share - Computation of Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Net income (loss)	$ (6,578)	$ 12,206
Less: Income allocable to unvested restricted stock	0	0
Income (loss) attributable to common shareholders for diluted earnings (loss) per share	$ (6,578)	$ 12,206
Common shares used in basic earnings (loss) per share (in shares)	13,151,600	13,146,085
Common share equivalents outstanding related to RSUs (in shares)	0	68,981
Total weighted average common shares and common share equivalents used in diluted earnings (loss) per share (in shares)	13,151,600	13,215,066
Basic (in dollars per share)	$ (0.5)	$ 0.93
Diluted (in dollars per share)	$ (0.5)	$ 0.92