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LOANS RECEIVABLE, NET AND RELATED ALLOWANCE FOR LOAN LOSSES (Schedule of Impaired Loans by Class) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Sep. 30, 2020
Financing Receivable, Impaired [Line Items]
Recorded Investment Impaired Loans with Specific Allowance	$ 2,835	$ 2,905
Related Allowance Impaired Loans with Specific Allowance	158	221
Recorded Investment Impaired Loans with No Specific Allowance	9,203	11,256
Total Impaired Loans Recorded Investment	12,038	14,161
Total Impaired Loans Unpaid Principal Balance	12,103	14,430
One-to four-family residential [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment Impaired Loans with Specific Allowance
Related Allowance Impaired Loans with Specific Allowance
Recorded Investment Impaired Loans with No Specific Allowance	2,483	2,601
Total Impaired Loans Recorded Investment	2,483	2,601
Total Impaired Loans Unpaid Principal Balance	2,483	2,601
Commercial real estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment Impaired Loans with Specific Allowance		599
Related Allowance Impaired Loans with Specific Allowance		46
Recorded Investment Impaired Loans with No Specific Allowance	3,137	3,806
Total Impaired Loans Recorded Investment	3,137	4,405
Total Impaired Loans Unpaid Principal Balance	3,137	4,405
Construction [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment Impaired Loans with Specific Allowance	2,835	2,306
Related Allowance Impaired Loans with Specific Allowance	158	175
Recorded Investment Impaired Loans with No Specific Allowance	1,745	2,835
Total Impaired Loans Recorded Investment	4,580	5,141
Total Impaired Loans Unpaid Principal Balance	4,645	5,206
Commercial business [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment Impaired Loans with Specific Allowance
Related Allowance Impaired Loans with Specific Allowance
Recorded Investment Impaired Loans with No Specific Allowance	1,838	2,014
Total Impaired Loans Recorded Investment	1,838	2,014
Total Impaired Loans Unpaid Principal Balance	$ 1,838	$ 2,218

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Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
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