FAIR VALUE ACCOUNTING (Carrying Amount and Estimated Fair Value) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
Financial assets:
Securities available for sale AFS	$ 119,702	$ 95,883
Securities held to maturity HTM	4,827	5,605
Carrying Amount
Financial assets:
Securities available for sale AFS	119,702	95,883
Carrying Amount | Quoted Prices in Active Markets for Identical Instruments (Level 1)
Financial assets:
Cash and cash equivalents	27,731	41,677
Non-marketable equity securities, at cost	6,862	7,292
Accrued interest receivable	3,306	3,291
Financial liabilities:
Other borrowings	29,059	30,319
Accrued interest payable	336	227
Carrying Amount | Significant Other Observable Inputs (Level 2)
Financial assets:
Other interest-bearing deposits	8,160	8,148
Securities held to maturity HTM	4,809	5,453
Loans held for sale	1,778	2,334
Financial liabilities:
FHLB advances	58,000	90,000
Carrying Amount | Significant Unobservable Inputs (Level 3)
Financial assets:
Loans receivable, net	754,629	727,053
Mortgage servicing rights	1,841	1,886
Financial liabilities:
Deposits	744,536	742,504
Estimated Fair Value
Financial assets:
Securities available for sale AFS	119,702	95,883
Estimated Fair Value | Quoted Prices in Active Markets for Identical Instruments (Level 1)
Financial assets:
Cash and cash equivalents	27,731	41,677
Non-marketable equity securities, at cost	6,862	7,292
Accrued interest receivable	3,306	3,291
Financial liabilities:
Other borrowings	29,059	30,319
Accrued interest payable	336	227
Estimated Fair Value | Significant Other Observable Inputs (Level 2)
Financial assets:
Other interest-bearing deposits	8,048	8,143
Securities held to maturity HTM	4,827	5,605
Loans held for sale	1,778	2,334
Financial liabilities:
FHLB advances	57,999	89,998
Estimated Fair Value | Significant Unobservable Inputs (Level 3)
Financial assets:
Loans receivable, net	749,079	737,119
Mortgage servicing rights	2,269	1,951
Financial liabilities:
Deposits	$ 748,555	$ 746,025