INCOME TAXES (Details) - USD ($)	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 1987
Federal [Abstract]
Current	$ 4,217,000	$ 3,787,000	$ 2,847,000
Deferred	(3,896,000)	(1,765,000)	(536,000)
Federal income tax expense	321,000	2,022,000	2,311,000
State [Abstract]
Current	1,048,000	874,000	1,252,000
Deferred	(1,000)	10,000	141,000
State tax expense	1,047,000	884,000	1,393,000
Income tax expense	1,368,000	2,906,000	3,704,000
Income tax expense (benefit) to statutory federal income tax rate reconciliation [Abstract]
Income tax expense at federal tax rate	6,798,000	6,517,000	5,993,000
Increase (decrease) resulting from [Abstract]
State income taxes net of federal benefit	692,000	575,000	1,092,000
Nontaxable buildup in cash surrender value	(711,000)	(399,000)	(349,000)
Incentive stock option expense	(37,000)	(187,000)	(97,000)
Tax exempt income	(5,230,000)	(3,594,000)	(2,815,000)
Nondeductible expenses	188,000	120,000	41,000
Other, net	(332,000)	(126,000)	(161,000)
Income tax expense	1,368,000	2,906,000	3,704,000
Deferred tax assets [Abstract]
Bad debts	2,286,000	1,955,000		$ 6,700,000
Deferred compensation	1,040,000	708,000
Stock based compensation	235,000	271,000
Operational reserve	453,000	464,000
AMT Credit	4,490,000	2,239,000
Intangibles	573,000	0
Net unrealized losses on securities available for sale	0	2,969,000
Indirect tax benefits of unrecognized tax positions	384,000	376,000
Other assets	1,293,000	759,000
Gross deferred tax assets	10,754,000	9,741,000
Deferred tax liabilities [Abstract]
FHLB stock dividend	(414,000)	(410,000)
Premises and equipment	(1,222,000)	(1,060,000)
Patents	(967,000)	(937,000)
Prepaid expenses	(633,000)	(743,000)
Net unrealized gains on securities available for sale	(521,000)	0
Deferred loan fees	0	0
Gross deferred tax liabilities	(3,757,000)	(3,150,000)
Net deferred tax assets (liabilities)	6,997,000	6,591,000
Gross deferred tax on state net operating loss carryforwards	829,000	780,000
Additional bad debt deductions provided by federal income tax laws	2,286,000	1,955,000		$ 6,700,000
Deferred tax liability, bad debt deductions	2,300,000	2,300,000
Reconciliation for liabilities [Abstract]
Balance at beginning of year	983,000	931,000
Additions for tax positions related to the current year	49,000	118,000
Additions for tax positions related to the prior years	4,000	0
Reductions for tax positions due to settlement with taxing authorities	(62,000)	(16,000)
Reductions for tax positions related to prior years	0	(50,000)
Balance at end of year	974,000	$ 983,000	$ 931,000
Unrecognized tax benefits that, if recognized, would impact the effective rate	641,000
Accrued interest related to unrecognized tax benefits	$ 155,000