Supporting Financial Information - Debt Obligations (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Sep. 30, 2024
Debt Instrument [Line Items]
Long-term debt	$ 151,650
Net bank debt obligations	147,307	$ 149,374
Less: current portion of debt obligations, net of deferred financing costs (a)	(17,036)	(12,058)
Long-term portion of debt obligations, net of deferred financing costs	130,271	137,316
Term loan amortization	14,250
Secured Debt
Debt Instrument [Line Items]
Long-term debt	137,750	142,500
Less: unamortized deferred financing costs	(4,343)	(5,184)
Term loan amortization	4,800
Current unamortized deferred financing costs	1,600
Revolving Line of Credit
Debt Instrument [Line Items]
Long-term debt	13,900	12,058
Revolving Line of Credit | Secured Debt
Debt Instrument [Line Items]
Long-term debt	$ 13,900	$ 12,058