Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2023	Mar. 31, 2022
Numerator:
Net income (loss)	$ 8,473	$ 1,162	$ (1,217)	$ (2,846)	$ 9,636	$ (4,063)
Denominator:
Weighted average basic shares (in shares)	11,878		11,801		11,869	11,783
Dilutive effect of restricted stock units (in shares)	271		0		240	0
Weighted average diluted shares (in shares)	12,149		11,801		12,109	11,783
Earnings (loss) per share:
Basic (in dollars per share)	$ 0.71		$ (0.10)		$ 0.81	$ (0.34)
Diluted (in dollars per share)	$ 0.70		$ (0.10)		$ 0.80	$ (0.34)