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Summary of Significant Accounting Policies (Net Income Per Common Share) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2022
Accounting Policies [Abstract]      
Net income $ 22,505 $ 24,770 $ 19,383
Denominator for basic net income per common share — weighted average shares outstanding 36,316,000 35,820,000 35,031,000
Effect of dilutive securities:      
Stock options and restricted stock units 668,000 1,049,000 964,000
Denominator for diluted net income per common share — adjusted weighted average shares 36,984,000 36,869,000 35,995,000
Net income per common share:      
Basic $ 0.62 $ 0.69 $ 0.55
Diluted net income per common share:      
Diluted $ 0.61 $ 0.67 $ 0.54
Antidilutive securities excluded from computation of earnings per share 678,697 395,190 647,181