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ACCRUED EXPENSES AND OTHER LIABILITIES - Schedule Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands | Mar. 31, 2026 | Sep. 30, 2025
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Payables and Accruals [Abstract] |  |
Accrued wages, bonuses, commissions and vacation | $ 5,061 | $ 6,587
Accrued interest | 354 | 155
Accrued contingent consideration — current portion | 1,023 | 82
Escrow liabilities — current portion | 1,255 | 0
Accrued tax distributions | 268 | 2,147
Accrued income tax expense | 150 | 2,760
Tax receivable agreement liability — current portion | 0 | 2,720
Customer deposits | 991 | 461
Employee health self-insurance liability | 0 | 13
Accrued third-party software expenses | 3,742 | 2,674
Accrued interchange | 3,951 | 3,139
Accrued excise taxes | 883 | 376
Other accrued expenses | 2,347 | 3,411
Accrued expenses and other current liabilities | $ 20,025 | $ 24,525

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