Note 16 - Income (Loss) Per Common Share - Computation of Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Net income (loss)	$ 12,206	$ (22,856)
Less: Income allocable to unvested restricted stock	0	0
Income (loss) attributable to common shareholders for diluted earnings (loss) per share	$ 12,206	$ (22,856)
Common shares used in basic earnings (loss) per share (in shares)	13,146,085	12,987,996
Common share equivalents outstanding related to RSUs (in shares)	68,981	0
Total weighted average common shares and common share equivalents used in diluted earnings (loss) per share (in shares)	13,215,066	12,987,996
Basic (in dollars per share)	$ 0.93	$ (1.76)
Diluted (in dollars per share)	$ 0.92	$ (1.76)