Note 12 - Earnings (Loss) Per Common Share - Computation of Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2023	Jun. 30, 2022
Net income (loss)	$ 3,228	$ 4,637	$ (97)	$ (6,574)	$ (1,474)	$ (6,768)	$ 7,768	$ (14,816)
Less: Income allocable to unvested restricted stock	0			0			0	0
Income (loss) attributable to common shareholders for diluted earnings (loss) per share	$ 3,228			$ (6,574)			$ 7,768	$ (14,816)
Common shares used in basic earnings (loss) per share (in shares)	13,171,654			13,013,616			13,131,795	12,977,146
Common share equivalents outstanding related to RSUs (in shares)	149,227			0			26,124	0
Total weighted average common shares and common share equivalents used in diluted earnings (loss) per share (in shares)	13,320,881			13,013,616			13,157,919	12,977,146
Basic (in dollars per share)	$ 0.25			$ (0.51)			$ 0.59	$ (1.14)
Diluted (in dollars per share)	$ 0.24			$ (0.51)			$ 0.59	$ (1.14)