Acquisitions - Additional Information Regarding Recent Acquisitions (Details)			1 Months Ended		3 Months Ended	9 Months Ended	12 Months Ended
	Jun. 09, 2021 USD ($)	Jun. 08, 2021 USD ($) numberOfStores payment shares	Jun. 30, 2021 USD ($)	May 31, 2021 store	Sep. 30, 2021 USD ($)	Jun. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)
Business Acquisition [Line Items]
Value of the company’s Class A Non-Voting common stock							$ 1,545,000	$ 0	$ 0
Additional contingent payments					$ 4,608,000		4,608,000	$ 0	$ 0
Texas Pawn Stores
Business Acquisition [Line Items]
Number of stores acquired | store				11
Bajio
Business Acquisition [Line Items]
Percentage acquired		100.00%
Aggregate purchase price		$ 23,600,000
Cash payments for acquisition		$ 17,400,000			3,800,000
Shares of the company’s Class A Non-Voting common stock (in shares) | shares		212,870
Value of the company’s Class A Non-Voting common stock		$ 1,600,000
Additional contingent payments		$ 4,600,000
Number of additional payments | payment		2
Additional payment term		2 years
Maximum percentage of future contingent consideration that can be paid in shares		50.00%
Payments to acquire business, paid at closing		$ 11,600,000
Business acquisition, consideration payable					$ 2,000,000		2,000,000
Business acquisition, final consideration payable on fifth anniversary of acquisition							400,000
Goodwill, expected tax deductible amount	$ 0
Business combination, revenue of acquiree since acquisition date			$ 9,600,000
Net loss of acquiree since acquisition			$ 100,000
Repayment of debt	$ 14,900,000
Acquisition related costs							$ 800,000
Bajio | Forecast
Business Acquisition [Line Items]
Cash payments for acquisition						$ 1,600,000
Bajio | MEXICO
Business Acquisition [Line Items]
Number of stores acquired | numberOfStores		128