Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ 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
Numerator:
Net income	$ 18,454	$ 8,473	$ 1,162	$ 9,061	$ (1,217)	$ (2,846)	$ 28,090	$ 4,998
Denominator:
Weighted average basic shares (in shares)	11,889			11,810			11,876	11,792
Dilutive effect of restricted stock units (in shares)	251			91			230	85
Weighted average diluted shares (in shares)	12,140			11,901			12,106	11,877
Earnings per share:
Basic (in dollars per share)	$ 1.55			$ 0.77			$ 2.37	$ 0.42
Diluted (in dollars per share)	$ 1.52			$ 0.76			$ 2.32	$ 0.42