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COMMITMENTS AND CONTINGENCIES (Details) - USD ($) | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Jan. 31, 2021 | Jan. 31, 2021 | Apr. 30, 2020 | Jan. 31, 2020
Loss Contingencies [Line Items] |  |  |  |
POM maximum per tax return |  | $ 10,000 |  |
Standard guarantee accrual amount | $ 9,200,000 | 9,200,000 | $ 9,400,000 | $ 7,000,000.0
Contingent business acquisition obligations | 18,800,000 | 18,800,000 | 14,200,000 | 11,400,000
Lines of credit, total obligation | 29,300,000 | 29,300,000 |  |
Remaining franchise equity lines of credit-undrawn commitment | 13,700,000 | $ 13,700,000 |  |
Social security subsidy received | 15,900,000 |  |  |
Percentage of participation interest, at par |  | 90.00% |  |
Purchased of participation interest, at par |  | $ 303,200,000 |  |
Loss contingency accrual | 5,500,000 | 5,500,000 | $ 1,600,000 | 1,600,000
MetaBank |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Guarantor Obligations, Maximum Exposure, Undiscounted | 18,000,000.0 | 18,000,000.0 |  |
Loss contingency accrual | $ 1,300,000 | $ 1,300,000 |  |
Axos |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loss contingency accrual |  |  |  | $ 1,900,000

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