LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES - Non-Accrual Loans and Non-Performing Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Sep. 30, 2025
CECL
Nonaccrual loans with an Allowance	$ 1,349	$ 695
Total Nonaccrual Loans	1,349	695
Real Estate Residential
CECL
Nonaccrual loans with an Allowance	1,257	679
Total Nonaccrual Loans	1,257	679
Real Estate - Commercial
CECL
Nonaccrual loans with an Allowance	92
Total Nonaccrual Loans	$ 92
Commercial - Secured
CECL
Nonaccrual loans with an Allowance		16
Total Nonaccrual Loans		$ 16

Amortized cost excluding accrued interest, of financing receivable on nonaccrual status. Excludes net investment in lease.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-16

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477657/942-210-S45-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478478/942-210-S50-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(7)(e)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant