Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Numerator:
Net income	$ 4,864	$ 2,880	$ 19,846	$ 7,261
Denominator:
Denominator for basic net income (loss) per share - weighted-average outstanding shares (in shares)	12,812	12,545	12,779	12,529
Effect of dilutive securities:
Stock options and restricted stock (in shares)	1,423	1,110	1,426	1,165
Denominator for diluted net income (loss) per share - weighted-average outstanding shares (in shares)	14,235	13,655	14,205	13,694
Net income per share - basic (in dollars per share)	$ 0.38	$ 0.23	$ 1.55	$ 0.58
Net income per share - diluted (in dollars per share)	$ 0.34	$ 0.21	$ 1.40	$ 0.54