GOODWILL AND INTANGIBLE ASSETS - Goodwill and Intangible Assets (Details) - USD ($)	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Intangible Assets [Roll Forward]
Balance, beginning of period	$ 33,148,000	$ 41,692,000
Acquisitions during the period	1,000	24,000
Amortization during the period	(6,585,000)	(8,545,000)	$ (10,997,000)
Write-offs during the period	(873,000)	(23,000)
Balance, end of period	25,691,000	33,148,000	41,692,000
Gross carrying amount	109,133,000	109,335,000
Accumulated amortization	(72,306,000)	(65,721,000)
Accumulated impairment	(11,136,000)	(10,466,000)
Anticipated intangible amortization [Abstract]
2023	4,937,000
2024	4,123,000
2025	3,561,000
2026	3,215,000
2027	2,569,000
Thereafter	7,286,000
Total anticipated intangible amortization	25,691,000	33,148,000	41,692,000
Trademark
Intangible Assets [Roll Forward]
Balance, beginning of period	9,823,000	10,901,000
Acquisitions during the period	0	0
Amortization during the period	(1,218,000)	(1,078,000)
Write-offs during the period	0	0
Balance, end of period	8,605,000	9,823,000	10,901,000
Gross carrying amount	14,624,000	14,624,000
Accumulated amortization	(6,019,000)	(4,801,000)
Accumulated impairment	0	0
Anticipated intangible amortization [Abstract]
Total anticipated intangible amortization	8,605,000	9,823,000	10,901,000
Non-Compete
Intangible Assets [Roll Forward]
Balance, beginning of period	40,000	422,000
Acquisitions during the period	0	0
Amortization during the period	(40,000)	(382,000)
Write-offs during the period	0	0
Balance, end of period	0	40,000	422,000
Gross carrying amount	2,481,000	2,481,000
Accumulated amortization	(2,481,000)	(2,441,000)
Accumulated impairment	0	0
Anticipated intangible amortization [Abstract]
Total anticipated intangible amortization	0	40,000	422,000
Customer Relationships
Intangible Assets [Roll Forward]
Balance, beginning of period	17,868,000	24,333,000
Acquisitions during the period	0	0
Amortization during the period	(4,803,000)	(6,465,000)
Write-offs during the period	(670,000)	0
Balance, end of period	12,395,000	17,868,000	24,333,000
Gross carrying amount	82,088,000	82,088,000
Accumulated amortization	(58,775,000)	(53,972,000)
Accumulated impairment	(10,918,000)	(10,248,000)
Anticipated intangible amortization [Abstract]
Total anticipated intangible amortization	12,395,000	17,868,000	24,333,000
Technology/Other
Intangible Assets [Roll Forward]
Balance, beginning of period	5,417,000	6,036,000
Acquisitions during the period	1,000	24,000
Amortization during the period	(524,000)	(620,000)
Write-offs during the period	(203,000)	(23,000)
Balance, end of period	4,691,000	5,417,000	6,036,000
Gross carrying amount	9,940,000	10,142,000
Accumulated amortization	(5,031,000)	(4,507,000)
Accumulated impairment	(218,000)	(218,000)
Anticipated intangible amortization [Abstract]
Total anticipated intangible amortization	$ 4,691,000	$ 5,417,000	$ 6,036,000
Refund Advantage Financial Services Inc | Trademark | Minimum
Intangible Assets [Roll Forward]
Book amortization period	5 years
Refund Advantage Financial Services Inc | Trademark | Maximum
Intangible Assets [Roll Forward]
Book amortization period	15 years
Refund Advantage Financial Services Inc | Customer Relationships | Minimum
Intangible Assets [Roll Forward]
Book amortization period	10 years
Refund Advantage Financial Services Inc | Customer Relationships | Maximum
Intangible Assets [Roll Forward]
Book amortization period	30 years
Refund Advantage Financial Services Inc | Technology/Other | Minimum
Intangible Assets [Roll Forward]
Book amortization period	3 years
Refund Advantage Financial Services Inc | Technology/Other | Maximum
Intangible Assets [Roll Forward]
Book amortization period	20 years