Accounts Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Accounts Receivable [Abstract]
Finance contracts maximum funding period	30 days
Total accounts receivable	$ 18,614	$ 15,294
Less - allowance for doubtful accounts	(135)	0
Total accounts receivable, net	18,479	15,294
Contracts in Transit [Member]
Accounts Receivable [Abstract]
Total accounts receivable	13,532	8,453
Trade and Other Accounts Receivable [Member]
Accounts Receivable [Abstract]
Total accounts receivable	1,023	1,544
Manufacturer Receivable [Member]
Accounts Receivable [Abstract]
Total accounts receivable	$ 4,059	$ 5,297