Summary of Significant Accounting Policies (Net Income Per Common Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Accounting Policies [Abstract]
Net income	$ 24,770	$ 19,383	$ 10,366
Denominator for basic net income per common share — weighted average shares outstanding	35,820,000	35,031,000	32,111,000
Effect of dilutive securities:
Stock options and restricted stock units	1,049,000	964,000	1,283,000
Denominator for diluted net income per common share — adjusted weighted average shares	36,869,000	35,995,000	33,394,000
Net income per common share:
Basic	$ 0.69	$ 0.55	$ 0.32
Diluted net income per common share:
Diluted	$ 0.67	$ 0.54	$ 0.31
Antidilutive securities excluded from computation of earnings per share	395,190	647,181	1,122,121