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LOANS RECEIVABLE, NET AND RELATED ALLOWANCE FOR CREDIT LOSSES - Schedule of Loan Portfolio (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2025 | Sep. 30, 2024
One-to-four family residential [Member] |  |
One-to-four family residential |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2025/ 2024 | $ 13,780 | $ 32,624
Term Loans Amortized Cost Basis by Origination Fiscal Year 2024/ 2023 | 32,632 | 42,084
Term Loans Amortized Cost Basis by Origination Fiscal Year 2023/ 2022 | 38,548 | 31,805
Term Loans Amortized Cost Basis by Origination Fiscal Year 2022/ 2021 | 29,549 | 25,970
Term Loans Amortized Cost Basis by Origination Fiscal Year 2021/ 2020 | 24,064 | 29,998
Term Loans Amortized Cost Basis by Origination Fiscal Year Prior | 106,662 | 83,378
Revolving Loans Amortized Cost Basis |  | 342
Revolving Loans Converted to Term |  |
Total | 245,235 | 246,201
One-to-four family residential [Member] | Revolving Credit Facility [Member] |  |
One-to-four family residential |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Commercial real estate [Member] |  |
One-to-four family residential |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2025/ 2024 | 87,742 | 88,597
Term Loans Amortized Cost Basis by Origination Fiscal Year 2024/ 2023 | 86,986 | 84,674
Term Loans Amortized Cost Basis by Origination Fiscal Year 2023/ 2022 | 80,720 | 66,412
Term Loans Amortized Cost Basis by Origination Fiscal Year 2022/ 2021 | 64,455 | 64,573
Term Loans Amortized Cost Basis by Origination Fiscal Year 2021/ 2020 | 55,285 | 29,568
Term Loans Amortized Cost Basis by Origination Fiscal Year Prior | 144,688 | 122,845
Revolving Loans Amortized Cost Basis | 4,114 | 3,718
Revolving Loans Converted to Term |  | 932
Total | 523,990 | 461,319
Commercial real estate [Member] | Revolving Credit Facility [Member] |  |
One-to-four family residential |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Construction and land [Member] |  |
One-to-four family residential |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2025/ 2024 | 8,538 | 5,650
Term Loans Amortized Cost Basis by Origination Fiscal Year 2024/ 2023 | 11,260 | 10,061
Term Loans Amortized Cost Basis by Origination Fiscal Year 2023/ 2022 | 2,757 |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2022/ 2021 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2021/ 2020 |  | 1,156
Term Loans Amortized Cost Basis by Origination Fiscal Year Prior | 2,575 | 4,069
Revolving Loans Amortized Cost Basis | 800 | 1,786
Revolving Loans Converted to Term |  |
Total | 25,930 | 22,722
Construction and land [Member] | Revolving Credit Facility [Member] |  |
One-to-four family residential |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Home equity loans and lines of credit [Member] |  |
One-to-four family residential |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2025/ 2024 | 400 | 1,585
Term Loans Amortized Cost Basis by Origination Fiscal Year 2024/ 2023 | 1,226 | 1,561
Term Loans Amortized Cost Basis by Origination Fiscal Year 2023/ 2022 | 1,433 | 1,600
Term Loans Amortized Cost Basis by Origination Fiscal Year 2022/ 2021 | 1,542 | 309
Term Loans Amortized Cost Basis by Origination Fiscal Year 2021/ 2020 | 276 | 247
Term Loans Amortized Cost Basis by Origination Fiscal Year Prior | 1,134 | 1,220
Revolving Loans Amortized Cost Basis | 23,404 | 17,902
Revolving Loans Converted to Term |  | 304
Total | 29,415 | 24,728
Home equity loans and lines of credit [Member] | Revolving Credit Facility [Member] |  |
One-to-four family residential |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Commercial Business [Member] |  |
One-to-four family residential |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2025/ 2024 | 319 | 2,062
Term Loans Amortized Cost Basis by Origination Fiscal Year 2024/ 2023 | 1,241 | 507
Term Loans Amortized Cost Basis by Origination Fiscal Year 2023/ 2022 | 476 | 2,517
Term Loans Amortized Cost Basis by Origination Fiscal Year 2022/ 2021 | 2,052 | 2,298
Term Loans Amortized Cost Basis by Origination Fiscal Year 2021/ 2020 | 1,068 | 802
Term Loans Amortized Cost Basis by Origination Fiscal Year Prior | 2,384 | 2,565
Revolving Loans Amortized Cost Basis | 11,595 | 13,072
Revolving Loans Converted to Term |  | 188
Total | 19,135 | 24,011
Commercial Business [Member] | Revolving Credit Facility [Member] |  |
One-to-four family residential |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Other [Member] |  |
One-to-four family residential |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2025/ 2024 | 41 | 61
Term Loans Amortized Cost Basis by Origination Fiscal Year 2024/ 2023 | 19 |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2023/ 2022 |  | 47
Term Loans Amortized Cost Basis by Origination Fiscal Year 2022/ 2021 | 30 |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2021/ 2020 |  | 9
Term Loans Amortized Cost Basis by Origination Fiscal Year Prior | 1,426 | 1,771
Revolving Loans Amortized Cost Basis | 189 | 347
Revolving Loans Converted to Term |  |
Total | 1,705 | 2,235
Other [Member] | Revolving Credit Facility [Member] |  |
One-to-four family residential |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Current period gross charge-offs |  |
Performing [Member] | One-to-four family residential [Member] |  |
One-to-four family residential |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2025/ 2024 | 13,780 | 32,624
Term Loans Amortized Cost Basis by Origination Fiscal Year 2024/ 2023 | 32,565 | 42,084
Term Loans Amortized Cost Basis by Origination Fiscal Year 2023/ 2022 | 37,983 | 31,711
Term Loans Amortized Cost Basis by Origination Fiscal Year 2022/ 2021 | 29,549 | 25,970
Term Loans Amortized Cost Basis by Origination Fiscal Year 2021/ 2020 | 24,064 | 29,976
Term Loans Amortized Cost Basis by Origination Fiscal Year Prior | 106,662 | 83,378
Revolving Loans Amortized Cost Basis |  | 342
Revolving Loans Converted to Term |  |
Total | 244,603 | 246,085
Performing [Member] | Home equity loans and lines of credit [Member] |  |
One-to-four family residential |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2025/ 2024 | 400 | 1,585
Term Loans Amortized Cost Basis by Origination Fiscal Year 2024/ 2023 | 1,226 | 1,561
Term Loans Amortized Cost Basis by Origination Fiscal Year 2023/ 2022 | 1,433 | 1,600
Term Loans Amortized Cost Basis by Origination Fiscal Year 2022/ 2021 | 1,542 | 309
Term Loans Amortized Cost Basis by Origination Fiscal Year 2021/ 2020 | 276 | 247
Term Loans Amortized Cost Basis by Origination Fiscal Year Prior | 1,134 | 1,220
Revolving Loans Amortized Cost Basis | 23,404 | 17,902
Revolving Loans Converted to Term |  | 304
Total | 29,415 | 24,728
Performing [Member] | Other [Member] |  |
One-to-four family residential |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2025/ 2024 | 41 | 61
Term Loans Amortized Cost Basis by Origination Fiscal Year 2024/ 2023 | 19 |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2023/ 2022 |  | 47
Term Loans Amortized Cost Basis by Origination Fiscal Year 2022/ 2021 | 30 |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2021/ 2020 |  | 9
Term Loans Amortized Cost Basis by Origination Fiscal Year Prior | 1,426 | 1,771
Revolving Loans Amortized Cost Basis | 189 | 347
Revolving Loans Converted to Term |  |
Total | 1,705 | 2,235
Non-performing [Member] | One-to-four family residential [Member] |  |
One-to-four family residential |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2025/ 2024 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2024/ 2023 | 67 |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2023/ 2022 | 565 | 94
Term Loans Amortized Cost Basis by Origination Fiscal Year 2022/ 2021 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2021/ 2020 |  | 22
Term Loans Amortized Cost Basis by Origination Fiscal Year Prior |  |
Revolving Loans Amortized Cost Basis |  |
Revolving Loans Converted to Term |  |
Total | 632 | 116
Non-performing [Member] | Home equity loans and lines of credit [Member] |  |
One-to-four family residential |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2025/ 2024 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2024/ 2023 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2023/ 2022 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2022/ 2021 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2021/ 2020 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year Prior |  |
Revolving Loans Amortized Cost Basis |  |
Revolving Loans Converted to Term |  |
Total |  |
Non-performing [Member] | Other [Member] |  |
One-to-four family residential |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2025/ 2024 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2024/ 2023 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2023/ 2022 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2022/ 2021 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2021/ 2020 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year Prior |  |
Revolving Loans Amortized Cost Basis |  |
Revolving Loans Converted to Term |  |
Total |  |
Pass [Member] | Commercial real estate [Member] |  |
One-to-four family residential |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2025/ 2024 | 87,742 | 88,597
Term Loans Amortized Cost Basis by Origination Fiscal Year 2024/ 2023 | 86,986 | 84,674
Term Loans Amortized Cost Basis by Origination Fiscal Year 2023/ 2022 | 80,720 | 66,412
Term Loans Amortized Cost Basis by Origination Fiscal Year 2022/ 2021 | 64,455 | 64,573
Term Loans Amortized Cost Basis by Origination Fiscal Year 2021/ 2020 | 55,285 | 29,568
Term Loans Amortized Cost Basis by Origination Fiscal Year Prior | 144,688 | 122,605
Revolving Loans Amortized Cost Basis | 4,114 | 3,718
Revolving Loans Converted to Term |  | 932
Total | 523,990 | 461,079
Pass [Member] | Construction and land [Member] |  |
One-to-four family residential |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2025/ 2024 | 8,538 | 5,650
Term Loans Amortized Cost Basis by Origination Fiscal Year 2024/ 2023 | 11,260 | 10,061
Term Loans Amortized Cost Basis by Origination Fiscal Year 2023/ 2022 | 2,757 |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2022/ 2021 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2021/ 2020 |  | 1,156
Term Loans Amortized Cost Basis by Origination Fiscal Year Prior | 2,575 | 4,069
Revolving Loans Amortized Cost Basis | 800 | 1,786
Revolving Loans Converted to Term |  |
Total | 25,930 | 22,722
Pass [Member] | Commercial Business [Member] |  |
One-to-four family residential |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2025/ 2024 | 319 | 2,062
Term Loans Amortized Cost Basis by Origination Fiscal Year 2024/ 2023 | 1,241 | 507
Term Loans Amortized Cost Basis by Origination Fiscal Year 2023/ 2022 | 476 | 2,517
Term Loans Amortized Cost Basis by Origination Fiscal Year 2022/ 2021 | 2,052 | 2,298
Term Loans Amortized Cost Basis by Origination Fiscal Year 2021/ 2020 | 1,068 | 802
Term Loans Amortized Cost Basis by Origination Fiscal Year Prior | 2,384 | 2,565
Revolving Loans Amortized Cost Basis | 11,595 | 13,072
Revolving Loans Converted to Term |  | 188
Total | 19,135 | 24,011
Special Mention [Member] | Commercial real estate [Member] |  |
One-to-four family residential |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2025/ 2024 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2024/ 2023 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2023/ 2022 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2022/ 2021 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2021/ 2020 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year Prior |  | 124
Revolving Loans Amortized Cost Basis |  |
Revolving Loans Converted to Term |  |
Total |  | 124
Special Mention [Member] | Construction and land [Member] |  |
One-to-four family residential |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2025/ 2024 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2024/ 2023 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2023/ 2022 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2022/ 2021 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2021/ 2020 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year Prior |  |
Revolving Loans Amortized Cost Basis |  |
Revolving Loans Converted to Term |  |
Total |  |
Special Mention [Member] | Commercial Business [Member] |  |
One-to-four family residential |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2025/ 2024 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2024/ 2023 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2023/ 2022 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2022/ 2021 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2021/ 2020 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year Prior |  |
Revolving Loans Amortized Cost Basis |  |
Revolving Loans Converted to Term |  |
Total |  |
Substandard [Member] | Commercial real estate [Member] |  |
One-to-four family residential |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2025/ 2024 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2024/ 2023 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2023/ 2022 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2022/ 2021 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2021/ 2020 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year Prior |  | 116
Revolving Loans Amortized Cost Basis |  |
Revolving Loans Converted to Term |  |
Total |  | 116
Substandard [Member] | Construction and land [Member] |  |
One-to-four family residential |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2025/ 2024 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2024/ 2023 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2023/ 2022 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2022/ 2021 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2021/ 2020 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year Prior |  |
Revolving Loans Amortized Cost Basis |  |
Revolving Loans Converted to Term |  |
Total |  |
Substandard [Member] | Commercial Business [Member] |  |
One-to-four family residential |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2025/ 2024 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2024/ 2023 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2023/ 2022 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2022/ 2021 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2021/ 2020 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year Prior |  |
Revolving Loans Amortized Cost Basis |  |
Revolving Loans Converted to Term |  |
Total |  |
Doubtful [Member] | Commercial real estate [Member] |  |
One-to-four family residential |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2025/ 2024 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2024/ 2023 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2023/ 2022 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2022/ 2021 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2021/ 2020 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year Prior |  |
Revolving Loans Amortized Cost Basis |  |
Revolving Loans Converted to Term |  |
Total |  |
Doubtful [Member] | Construction and land [Member] |  |
One-to-four family residential |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2025/ 2024 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2024/ 2023 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2023/ 2022 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2022/ 2021 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2021/ 2020 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year Prior |  |
Revolving Loans Amortized Cost Basis |  |
Revolving Loans Converted to Term |  |
Total |  |
Doubtful [Member] | Commercial Business [Member] |  |
One-to-four family residential |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2025/ 2024 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2024/ 2023 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2023/ 2022 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2022/ 2021 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year 2021/ 2020 |  |
Term Loans Amortized Cost Basis by Origination Fiscal Year Prior |  |
Revolving Loans Amortized Cost Basis |  |
Revolving Loans Converted to Term |  |
Total |  |

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