LOANS RECEIVABLE, NET AND RELATED ALLOWANCE FOR LOAN LOSSES (Schedule of Classes of the Loan Portfolio Summarized by Aging Categories) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Sep. 30, 2020
Financing Receivable, Past Due [Line Items]
Current	$ 604,150	$ 600,512
Total Past Due	10,974	10,747
Non - Accrual	9,431	9,732
Total loans receivable	615,124	611,259
30-59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due	214
60-89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due	1,329	1,015
90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due	9,431	9,732
One-to four-family residential [Member]
Financing Receivable, Past Due [Line Items]
Current	201,842	209,455
Total Past Due	1,846	905
Non - Accrual	911	905
Total loans receivable	203,688	210,360
One-to four-family residential [Member] \| 30-59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due
One-to four-family residential [Member] \| 60-89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due	935
One-to four-family residential [Member] \| 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due	911	905
Commercial real estate [Member]
Financing Receivable, Past Due [Line Items]
Current	274,054	245,029
Total Past Due	2,868	3,105
Non - Accrual	2,474	2,219
Total loans receivable	276,922	248,134
Commercial real estate [Member] \| 30-59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due
Commercial real estate [Member] \| 60-89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due	394	886
Commercial real estate [Member] \| 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due	2,474	2,219
Construction [Member]
Financing Receivable, Past Due [Line Items]
Current	20,084	23,101
Total Past Due	4,580	5,141
Non - Accrual	4,580	5,141
Total loans receivable	24,664	28,242
Construction [Member] \| 30-59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due
Construction [Member] \| 60-89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due
Construction [Member] \| 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due	4,580	5,141
Home equity lines of credit [Member]
Financing Receivable, Past Due [Line Items]
Current	18,047	19,373
Total Past Due
Non - Accrual
Total loans receivable	18,047	19,373
Home equity lines of credit [Member] \| 30-59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due
Home equity lines of credit [Member] \| 60-89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due
Home equity lines of credit [Member] \| 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due
Commercial business [Member]
Financing Receivable, Past Due [Line Items]
Current	86,523	99,397
Total Past Due	1,679	1,596
Non - Accrual	1,466	1,467
Total loans receivable	88,202	100,993
Commercial business [Member] \| 30-59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due	213
Commercial business [Member] \| 60-89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due		129
Commercial business [Member] \| 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due	1,466	1,467
Other [Member]
Financing Receivable, Past Due [Line Items]
Current	3,600	4,157
Total Past Due	1
Non - Accrual
Total loans receivable	3,601	4,157
Other [Member] \| 30-59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due	1
Other [Member] \| 60-89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due
Other [Member] \| 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due