Accounts Receivable (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2026	Sep. 30, 2025
Receivables [Abstract]
Finance contracts maximum funding period	30 days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	$ 65,164	$ 61,437
Less – allowance for credit losses	(672)	(552)
Total accounts receivable, net	64,492	60,885
Contracts in transit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	32,657	17,942
Trade accounts receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	14,953	29,642
Manufacturer receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	14,942	10,903
Income tax receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	$ 2,612	$ 2,950