Summary of Significant Accounting Policies (Net Income Per Common Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Accounting Policies [Abstract]
Net income	$ 40,804	$ 22,505	$ 24,770
Denominator for basic net income per common share — weighted average shares outstanding	36,959,000	36,316,000	35,820,000
Effect of dilutive securities:
Stock options and restricted stock units	780,000	668,000	1,049,000
Denominator for diluted net income per common share — adjusted weighted average shares	37,739,000	36,984,000	36,869,000
Net income per common share:
Basic	$ 1.10	$ 0.62	$ 0.69
Diluted net income per common share:
Diluted	$ 1.08	$ 0.61	$ 0.67
Antidilutive securities excluded from computation of earnings per share	208,603	678,697	395,190

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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