Note 11 - 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, 2025	Mar. 31, 2025	Dec. 31, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2025	Jun. 30, 2024
Net income (loss)	$ 760	$ (9,798)	$ 8,376	$ (2,070)	$ (4,327)	$ 12,679	$ (662)	$ 6,282
Common shares used in basic earnings (loss) per share (in shares)	12,805,414			13,216,386			12,783,832	13,270,444
Common share equivalents outstanding related to RSUs (in shares)	0			0			0	161,270
Total weighted average common shares and common share equivalents used in diluted earnings (loss) per share (in shares)	12,805,414			13,216,386			12,783,832	13,431,714
Basic (in dollars per share)	$ 0.06			$ (0.16)			$ (0.05)	$ 0.47
Diluted (in dollars per share)	$ 0.06			$ (0.16)			$ (0.05)	$ 0.47