Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Numerator:
Net income	$ 1,738	$ 4,864	$ 4,090	$ 19,846
Denominator:
Denominator for basic net income (loss) per share - weighted-average outstanding shares (in shares)		12,812		12,779
Effect of dilutive securities:
Stock options and restricted stock (in shares)	685	1,423	783	1,426
Net income per share - basic (in dollars per share)	$ 0.13	$ 0.38	$ 0.30	$ 1.55
Net income per share - diluted (in dollars per share)	$ 0.12	$ 0.34	$ 0.28	$ 1.40