Accounts Receivable (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2026	Sep. 30, 2025
Receivables [Abstract]
Finance contracts maximum funding period	30 days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	$ 61,135	$ 61,437
Less – allowance for credit losses	(474)	(552)
Total accounts receivable, net	60,661	60,885
Contracts in transit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	29,308	17,942
Trade accounts receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	15,886	29,642
Manufacturer receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	13,534	10,903
Income tax receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	$ 2,407	$ 2,950