LOANS RECEIVABLE, NET AND RELATED ALLOWANCE FOR LOAN LOSSES (Schedule of Loans Receivable, Net) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	$ 519,876	$ 512,498
Net deferred loan costs	104	132
Allowance for loan losses	(4,600)	(4,200)
Total loans receivable, net	515,380	508,430
One-to four-family residential [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	189,066	185,287
Allowance for loan losses	(710)	(687)
Commercial real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	223,432	219,347
Allowance for loan losses	(1,685)	(1,540)
Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	33,493	30,412
Allowance for loan losses	(816)	(493)
Home equity lines of credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	19,482	17,982
Allowance for loan losses	(138)	(109)
Commercial business [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	49,225	53,320
Allowance for loan losses	(1,104)	(1,151)
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	5,178	6,150
Allowance for loan losses	$ (3)	$ (25)

Amount of deferred costs incurred to originate loans and leases from face amounts of acquired loans.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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