FAIR VALUE - Carrying Amount and Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Sep. 30, 2021
Carrying Amount [Member]
Financial Assets [Abstract]
Cash and cash equivalents	$ 127,140	$ 166,544
Securities held to maturity	4,629	8,611
Securities available-for-sale	5,070	7,747
Federal Home Loan Bank stock	3,612	3,714
Loans, net	1,279,155	1,238,573
Accrued interest receivable	7,894	9,363
Financial Liabilities [Abstract]
Time deposits	286,247	377,836
Demand and other deposits	943,995	786,826
Borrowings	75,823	159,642
Subordinated debentures	24,541	24,513
Accrued interest payable	980	1,290
As Adjusted
Financial Assets [Abstract]
Cash and cash equivalents	127,140	166,544
Securities held to maturity	4,581	8,865
Securities available-for-sale	5,070	7,747
Loans, net	1,260,283	1,278,056
Accrued interest receivable	7,894	9,363
Financial Liabilities [Abstract]
Time deposits	282,653	378,333
Demand and other deposits	943,995	786,826
Borrowings	76,057	159,608
Subordinated debentures	24,666	27,092
Accrued interest payable	980	1,290
As Adjusted \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial Assets [Abstract]
Cash and cash equivalents	127,140	166,544
Securities held to maturity	0	0
Securities available-for-sale	0	0
Loans, net	0	0
Accrued interest receivable	0	0
Financial Liabilities [Abstract]
Time deposits	0	0
Demand and other deposits	943,995	786,826
Borrowings	0	0
Subordinated debentures	0	0
Accrued interest payable	1	1
As Adjusted \| Significant Other Observable Inputs (Level 2) [Member]
Financial Assets [Abstract]
Cash and cash equivalents	0	0
Securities held to maturity	4,581	8,865
Securities available-for-sale	5,070	7,747
Loans, net	0	0
Accrued interest receivable	105	211
Financial Liabilities [Abstract]
Time deposits	282,653	378,333
Demand and other deposits	0	0
Borrowings	76,057	159,608
Subordinated debentures	24,666	27,092
Accrued interest payable	979	713
As Adjusted \| Significant Unobservable Inputs (Level 3) [Member]
Financial Assets [Abstract]
Cash and cash equivalents	0	0
Securities held to maturity	0	0
Securities available-for-sale	0	0
Loans, net	1,260,283	1,278,056
Accrued interest receivable	7,789	9,152
Financial Liabilities [Abstract]
Time deposits	0	0
Demand and other deposits	0	0
Borrowings	0	0
Subordinated debentures	0	0
Accrued interest payable	$ 0	$ 576

Fair value portion of accrued interest payable.

No definition available.

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- Definition

Fair value portion of accrued interest receivable.

+ References

No definition available.

+ Details

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- Definition

Fair value portion of investment in debt or equity security measured at amortized cost.

+ References

No definition available.

+ Details

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- Definition

Fair value portion of demand and other deposits.

+ References

No definition available.

+ Details

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- Definition

Fair value portion of investment in debt security measured at amortized cost (held-to-maturity).

+ References

No definition available.

+ Details

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- Definition

Fair value portion of time deposit liabilities held by the entity.

+ References

No definition available.

+ Details

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- Definition

Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

No definition available.

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- Definition

Fair value of subordinated debt obligations including, but not limited to, subordinated loan, subordinated bond, subordinated debenture or junior debt.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

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- References

No definition available.

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- References

No definition available.

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- Definition

Fair value portion of investments in Federal Home Loan Bank (FHLBank) stock.

+ References

No definition available.

+ Details

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- Definition

Fair value portion of contractual arrangement with a lender under which borrowings can be made up to a specific amount at any point in time.

+ References

No definition available.

+ Details

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- Definition

Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-URI http://asc.fasb.org/subtopic&trid=2196772

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