Acquisitions - Additional Information Regarding Recent Acquisitions (Details)			1 Months Ended	3 Months Ended			12 Months Ended
	Jun. 09, 2021 USD ($)	Jun. 08, 2021 USD ($) store payment shares	Jul. 31, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Jun. 30, 2022 USD ($)
Business Acquisition [Line Items]
Transfer of equity consideration for acquisition							$ 99,000	$ 0	$ 1,545,000
Acquisition earn-out contingency						$ 4,608,000	2,000,000	0	4,608,000
Measurement period adjustments								678,000
Bajio
Business Acquisition [Line Items]
Percentage acquired		100.00%
Aggregate purchase price		$ 23,600,000			$ 22,300,000
Cash payments for acquisition		$ 17,400,000	$ 300,000			3,800,000
Shares of the company’s class a non-voting common stock (in shares) | shares		212,870
Transfer of equity consideration for acquisition		$ 1,600,000
Acquisition earn-out contingency		$ 4,600,000					0	$ 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
Measurement period adjustments				$ 700,000	1,300,000
Business acquisition increase decrease in consideration payable					$ 1,300,000
Business acquisition, consideration payable						$ 2,000,000			2,000,000	$ 600,000
Business acquisition, final consideration payable on fifth anniversary of acquisition							300,000
Reduction in contingent consideration liability							$ 5,100,000
Business combination, revenue of acquiree since acquisition date									9,600,000
Business combination, net loss of acquiree since acquisition date									100,000
Repayment of debt	$ 14,900,000
Acquisition related costs									$ 800,000
Bajio | MEXICO
Business Acquisition [Line Items]
Number of stores acquired | store		128