Note 10 - Earnings (Loss) Per Common Share - Computation of Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Net income (loss)	$ 12,679	$ (97)
Less: Income allocable to unvested restricted stock	0	0
Income (loss) attributable to common shareholders for diluted earnings (loss) per share	$ 12,679	$ (97)
Common shares used in basic earnings (loss) per share (in shares)	13,251,360	13,067,991
Common share equivalents outstanding related to RSUs (in shares)	209,156	0
Total weighted average common shares and common share equivalents used in diluted earnings (loss) per share (in shares)	13,460,516	13,067,991
Basic (in dollars per share)	$ 0.96	$ (0.01)
Diluted (in dollars per share)	$ 0.94	$ (0.01)