Prudential Bancorp (PBIP) 10-Q 16 Feb 21 2021 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Dec. 31, 2020	Jan. 31, 2021
Document and Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Dec. 31, 2020
Document Transition Report	false
Entity Registrant Name	PRUDENTIAL BANCORP, INC.
Entity Central Index Key	0001578776
Entity File Number	000-55084
Entity Incorporation, State or Country Code	PA
Entity Tax Identification Number	46-2935427
Entity Address, Address Line One	1834 West Oregon Avenue
Entity Address, City or Town	Philadelphia
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	19145
City Area Code	215
Local Phone Number	755-1500
Title of 12(b) Security	Common Stock
Trading Symbol	PBIP
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock Shares Outstanding		7,996,864
Amendment Flag	false
Current Fiscal Year End Date	--09-30
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1

CONSOLIDATED STATEMENT OF FINAN

CONSOLIDATED STATEMENT OF FINANCIAL CONDITION - USD ($) $ in Thousands	Dec. 31, 2020	Sep. 30, 2020
ASSETS
Cash and amounts due from depository institutions	$ 2,713	$ 2,781
Interest-bearing deposits	88,245	114,300
Total cash and cash equivalents	90,958	117,081
Certificates of deposit	2,102	2,102
Investment and mortgage-backed securities available for sale at fair value	400,904	420,364
Investment and mortgage-backed securities held to maturity (fair value-December 31, 2020, $24,012; September 30, 2020, $24,330)	22,590	22,860
Equity securities	62	51
Loans receivable-net of allowance for loan losses (December 31, 2020, $8,318; September 30, 2020, $8,303)	605,883	588,300
Accrued interest receivable	4,375	4,699
Office properties and equipment-net	7,098	7,129
Bank owned life insurance (BOLI)	32,658	32,498
Deferred income taxes, net	3,051	3,902
Goodwill	6,102	6,102
Core deposit intangible	314	340
Prepaid expenses and other assets	4,973	5,393
Restricted bank stock	12,197	12,532
TOTAL ASSETS	1,193,267	1,223,353
Deposits:
Non-interest-bearing	28,820	30,002
Interest-bearing	719,639	740,947
Total deposits	748,459	770,949
Advances from Federal Home Loan Bank - Short Term	25,000	25,000
Advances from Federal Home Loan Bank - Long Term	254,900	260,253
Accrued interest payable	1,560	3,374
Advances from borrowers for taxes and insurance	2,749	2,798
Interest rate swap contracts	19,232	20,960
Accounts payable and accrued expenses	10,122	10,902
Total liabilities	1,062,022	1,094,236
STOCKHOLDERS' EQUITY:
Preferred stock, $.01 par value, 10,000,000 shares authorized; none issued
Common stock, $.01 par value, 40,000,000 shares authorized; 10,819,006 issued and 7,996,864 outstanding at December 31, 2020; 10,819,006 issued and 8,138,675 outstanding at September 30, 2020	108	108
Additional paid-in capital	118,356	118,270
Treasury stock, at cost: 2,822,142 shares at December 31, 2020 and 2,680,331 shares at September 30, 2020	(41,167)	(39,207)
Retained earnings	54,155	52,889
Accumulated other comprehensive (loss) income	(207)	(2,943)
Total stockholders' equity	131,245	129,117
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 1,193,267	$ 1,223,353

CONSOLIDATED STATEMENT OF FIN_2

CONSOLIDATED STATEMENT OF FINANCIAL CONDITION (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2020	Sep. 30, 2020
CONSOLIDATED STATEMENT OF FINANCIAL CONDITION
Investment and mortgage-backed securities held to maturity, fair value (in dollars)	$ 24,012	$ 24,330
Allowance for loan losses on loans receivable (in dollars)	$ 8,318	$ 8,303
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	10,819,006	10,819,006
Common stock, shares outstanding	7,996,864	8,138,675
Number of treasury share purchased	2,822,142	2,680,331

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
INTEREST INCOME:
Interest and fees on loans	$ 6,275,000	$ 6,830,000
Interest on mortgage-backed securities	1,616,000	2,793,000
Interest and dividends on investments	1,714,000	1,802,000
Interest on interest-bearing deposits	84,000	402,000
Total interest income	9,689,000	11,827,000
INTEREST EXPENSE:
Interest on deposits	2,170,000	3,125,000
Interest on advances from FHLB - short term	25,000	456,000
Interest on advances from FHLB - long term	1,811,000	1,903,000
Total interest expense	4,006,000	5,484,000
NET INTEREST INCOME	5,683,000	6,343,000
PROVISION FOR LOAN LOSSES	0	125,000
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	5,683,000	6,218,000
NON-INTEREST INCOME:
Fees and other service charges	139,000	165,000
Gain on sale of mortgage-backed securities available for sale		318,000
Gain (loss) on equity securities, net	11,000	(18,000)
Gain on sale of loans	40,000	26,000
Swap income	103,000	33,000
Earnings from bank owned life insurance	160,000	169,000
Other	84,000	139,000
Total non-interest income	537,000	832,000
NON-INTEREST EXPENSES:
Salaries and employee benefits	2,416,000	2,298,000
Data processing	195,000	192,000
Professional services	457,000	404,000
Office occupancy	229,000	204,000
Depreciation	111,000	155,000
Director compensation	53,000	59,000
Federal Deposit Insurance Corporation deposit insurance premiums	130,000	181,000
Real estate owned expense		47,000
Advertising	32,000	39,000
Core deposit amortization	26,000	30,000
Other	448,000	412,000
Total non-interest expenses	4,097,000	4,021,000
INCOME BEFORE INCOME TAXES	2,123,000	3,029,000
INCOME TAXES:
Current	162,000	566,000
Deferred (benefit) expense	124,000
Total income tax provision	286,000	566,000
NET INCOME	$ 1,837,000	$ 2,463,000
BASIC EARNINGS PER SHARE	$ 0.23	$ 0.28
DILUTED EARNINGS PER SHARE	0.23	0.28
DIVIDENDS PER SHARE	$ 0.07	$ 0.07

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income	$ 1,837	$ 2,463
Unrealized holding gain (loss) on available-for-sale securities	2,082	(1,173)
Tax effect	(446)	246
Reclassification adjustment for net securities (gains) losses realized in net income		(318)
Tax effect	(295)	(481)
Unrealized holding (loss) gain on interest rate swaps	1,395	2,292
Tax effect		67
Total other comprehensive income (loss)	2,736	633
Comprehensive income	$ 4,573	$ 3,096

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Treasury Stock	Retained EarningsCumulative Effect, Period of Adoption, Adjustment [Member]	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Cumulative Effect, Period of Adoption, Adjustment [Member]	Total
BALANCE at Sep. 30, 2019	$ 108	$ 118,384	$ (29,698)	$ (75)	$ 49,625	$ 1,192	$ (75)	$ 139,611
Increase (Decrease) in Stockholders' Equity
Net income					2,463			2,463
Other comprehensive income (loss)						633		633
Dividends paid					(622)			(622)
Stock option expense		153						153
Restricted shares award expense		136						136
BALANCE at Dec. 31, 2019	108	118,673	(29,698)		51,391	1,825		142,299
BALANCE at Sep. 30, 2020	108	118,270	(39,207)		52,889	(2,943)		129,117
Increase (Decrease) in Stockholders' Equity
Net income					1,837			1,837
Other comprehensive income (loss)						2,736		2,736
Dividends paid					(571)			(571)
Purchase of treasury stock			(1,960)					(1,960)
Stock option expense		43						43
Restricted shares award expense		43						43
BALANCE at Dec. 31, 2020	$ 108	$ 118,356	$ (41,167)		$ 54,155	$ (207)		$ 131,245

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parentheticals) - $ / shares	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY
Dividends paid (in dollars per share)	$ 0.07	$ 0.07
Purchase of treasury stock	141,811

CONSOLIDATED STATEMENTS OF CH_3

CONSOLIDATED STATEMENTS OF CHANGES OF CASH FLOW - USD ($)	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
OPERATING ACTIVITIES:
Net income	$ 1,837,000	$ 2,463,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	111,000	155,000
Net amortization/accretion of premiums/discounts and other amortization	(174,000)	(721,000)
Earnings on BOLI	(160,000)	(169,000)
Provision for loan losses	0	125,000
Accretion of deferred loan fees and costs	(3,000)	(92,000)
(Gain) loss on sale of investment and mortgage-backed securities		(318,000)
Write-down of real estate owned		40,000
Gain on sale of loans	(40,000)	(26,000)
Proceeds from the sale of loans	2,765,000	4,937,000
Originations of loans held for sale	(2,725,000)	(4,911,000)
Share-based compensation expense	86,000	289,000
Holding (gains) losses on equity securities	(11,000)	18,000
Holding losses (gains) on equity securities	(11,000)	18,000
Deferred income tax benefit	124,000
Changes in assets and liabilities which used cash:
Accrued interest receivable	324,000	(54,000)
Accrued interest payable	(1,814,000)	(2,290,000)
Other, net	(426,000)	(43,000)
Net cash provided by operating activities	(106,000)	(597,000)
INVESTING ACTIVITIES:
Purchase of investment and mortgage-backed securities available for sale	(14,196,000)	(60,376,000)
Purchase of investment and mortgage-backed securities held to maturity		(2,500,000)
Loans originated or acquired	(73,715,000)	(32,974,000)
Principal collected on loans	56,310,000	29,463,000
Principal payments received on investment and mortgage-backed securities:
Held-to-maturity	247,000	902,000
Available-for-sale	35,502,000	23,346,000
Proceeds from sale of investment and mortgage-backed securities		17,774,000
Proceeds from redemption of FHLB stock	1,296,000	1,295,000
Purchase of FHLB stock	(960,000)	(2,468,000)
Purchases of equipment	(80,000)	(124,000)
Net cash provided by (used in) investing activities	4,404,000	(25,662,000)
FINANCING ACTIVITIES:
Net increase (decrease) in demand deposits, NOW accounts, and savings accounts	(32,831,000)	24,371,000
Net (decrease) increase in certificates of deposit	10,345,000	(48,880,000)
Net (decrease) increase in FHLB short-term advances		40,000,000
Repayment of FHLB advances - long term	(5,354,000)	(8,748,000)
Increase in advances from borrowers for taxes and insurance	(49,000)	977,000
Cash dividends paid	(571,000)	(622,000)
Purchase of treasury stock	(1,960,000)
Net cash (used in) provided by financing activities	(30,420,000)	7,098,000
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(26,122,000)	(19,161,000)
CASH AND CASH EQUIVALENTS-Beginning of period	117,081,000	47,968,000
CASH AND CASH EQUIVALENTS-End of period	90,959,000	28,807,000
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Interest on deposits and advances from Federal Home Loan Bank	$ 5,820,000	7,774,000
Lease adoption:
Right of use lease asset		1,415,000
Lease liability		$ 1,536,000

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	3 Months Ended
	Dec. 31, 2020
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	1. SIGNIFICANT ACCOUNTING POLICIES Prudential Bancorp, Inc. (the “Company”) is a Pennsylvania corporation and the parent holding company for Prudential Bank (the “Bank”). The Company is a registered bank holding company. The Bank is a community-oriented, Pennsylvania-chartered savings bank headquartered in South Philadelphia. The banking office network currently consists of the headquarters and main office (which includes a branch office), an administrative office, and nine additional full-service branch offices. Eight of the branch offices are located in Philadelphia (Philadelphia County), one is in Drexel Hill, Delaware County, and one is in Huntingdon Valley, Montgomery County (both Pennsylvania counties). The Bank maintains ATMs at all 10 of the banking offices. The Bank also provides on-line and mobile banking services. The Bank is subject to regulation by the Pennsylvania Department of Banking and Securities (the “Department”), as its chartering authority and primary regulator, and by the Federal Deposit Insurance Corporation (the “FDIC”), which insures the Bank’s deposits up to applicable limits. As a bank holding company, the Company is subject to the regulation of the Board of Governors of the Federal Reserve System. Basis of presentation – Use of Estimates in the Preparation of Financial Statements — Recent Accounting Pronouncements Not Yet Adopted In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments Update for SEC filers that are eligible to be smaller reporting companies, non-SEC filers, and all other companies to fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. We expect to recognize a one-time cumulative effect adjustment to the allowance for loan losses as of the beginning of the first reporting period in which the new standard is effective, but cannot yet determine the magnitude of any such one-time adjustment or the overall impact of the new guidance on the consolidated financial statements. In May 2019, the FASB issued ASU 2019-05, Financial Instruments – Credit Losses, Topic 326, which allows entities to irrevocably elect the fair value option for certain financial assets previously measured at amortized cost upon adoption of the new credit losses standard. To be eligible for the transition election, the existing financial asset must otherwise be both within the scope of the new credit losses standard and eligible for the applying the fair value option in ASC 825-10-3. The election must be applied on an instrument-by-instrument basis and is not available for either available-for-sale or held-to-maturity debt securities. For entities that elect the fair value option, the difference between the carrying amount and the fair value of the financial asset would be recognized through a cumulative-effect adjustment to opening retained earnings as of the date an entity adopted ASU 2016-13. Changes in fair value of that financial asset would subsequently be reported in current earnings. For entities that have not yet adopted ASU 2016-13, the effective dates and transition requirements are the same as those in ASU 2016-13. The Company is currently evaluating the impact the adoption of the standard will have on the Company’s financial position and or results of operations. In November 2019, the FASB issued ASU 2019-10, Financial Instruments ‒ Credit Losses (Topic 326), Derivatives and Hedging (Topic 815), and Leases (Topic 842) In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740) ​ In January 2020, the FASB issued ASU 2020-4, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting, March 2020, to provide temporary optional expedients and exceptions to the U.S. GAAP guidance on contract modifications and hedge accounting to ease the financial reporting burdens of the expected market transition from LIBOR and other interbank offered rates to alternative reference rates, such as Secured Overnight Financing Rate. Entities can elect not to apply certain modification accounting requirements to contracts affected by what the guidance calls reference rate reform, if certain criteria are met. An entity that makes this election would not have to remeasure the contracts at the modification date or reassess a previous accounting determination. Also, entities can elect various optional expedients that would allow them to continue applying hedge accounting for hedging relationships affected by reference rate reform, if certain criteria are met, and can make a one-time election to sell and/or reclassify held-to-maturity debt securities that reference an interest rate affected by reference rate reform. The amendments in this ASU are effective for all entities upon issuance through December 31, 2022. The Company is currently evaluating the impact the adoption of the standard will have on the Company’s financial position and/or results of operations. ​ In October 2020, the FASB issued ASU 2020-09, Debt (Topic 470): Amendments to SEC Paragraphs Pursuant to SEC Release No. 33-10762 ​ In October 2020, the FASB issued ASU 2020-10, Codification Improvements ​ In November 2020, the FASB issued ASU 2020-11, Financial Services – Insurance (Topic 944), Financial Services— Insurance: Targeted Improvements to the Accounting for Long-Duration Contracts ​ In January 2021, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848) ​ ​

EARNINGS PER SHARE

EARNINGS PER SHARE	3 Months Ended
	Dec. 31, 2020
EARNINGS PER SHARE
EARNINGS PER SHARE	2. EARNINGS PER SHARE Basic earnings per common share is computed by dividing net income available to common stockholders by the weighted average number of shares of common stock issued, net of any treasury shares and unearned restricted share awards, during the period. Diluted earnings per share is calculated by dividing net income available to common stockholders by the weighted average number of shares of common stock outstanding, net of any treasury shares, after consideration of the potential dilutive effect of common stock equivalents (CSEs), based upon the treasury stock method using an average market price for the period. The calculated basic and diluted earnings per share are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended December 31, ​ ​ ​ 2020 ​ 2019 ​ ​ ​ (Dollars in Thousands Except Per Share Data) ​ ​ Basic Diluted Basic Diluted ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income ​ $ 1,837 ​ $ 1,837 ​ $ 2,463 ​ $ 2,463 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted average common shares outstanding ​ 8,104,713 ​ 8,104,713 ​ 8,755,165 ​ 8,755,165 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Effect of CSEs ​ — ​ 21,077 ​ — ​ 170,827 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Adjusted weighted average common shares used in earnings per share computation ​ 8,104,713 ​ 8,125,790 ​ 8,755,165 ​ 8,925,992 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Earnings per share ​ $ 0.23 ​ $ 0.23 ​ $ 0.28 ​ $ 0.28 ​ ​ ​ As of December 31, 2020 and 2019, there were 282,728 and 550,832 shares of common stock, respectively, subject to options with exercise prices less than the then current market and which were included in the computation of diluted earnings per share. At December 31, 2020 and 2019, there were 288,533 and 242,202 shares, respectively, that had exercise prices greater than the then current market value and were considered anti-dilutive at such dates.

ACCUMULATED OTHER COMPREHENSIVE

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)	3 Months Ended
	Dec. 31, 2020
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) [Abstract]
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)	3. ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) The following tables present the changes in accumulated other comprehensive income (loss) by component, net of tax, for the periods presented: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended December 31, ​ Three Months Ended December 31, ​ ​ ​ 2020 ​ 2020 ​ 2020 ​ 2019 ​ 2019 ​ 2019 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ ​ ​ ​ ​ ​ ​ Total ​ ​ ​ ​ ​ ​ ​ ​ ​ accumulated ​ ​ ​ ​ ​ ​ ​ accumulated ​ ​ ​ Unrealized gain ​ Unrealized gain (loss) ​ other ​ Unrealized gain ​ Unrealized gain (loss) ​ other ​ ​ ​ (loss) on AFS ​ on interest rate swaps ​ comprehensive ​ (loss) on AFS ​ on interest rate swaps ​ comprehensive ​ ​ securities (a) (a) income (loss) securities (a) (a) income (loss) ​ Beginning balance, October 1 ​ $ 10,585 ​ $ (13,528) ​ $ (2,943) ​ $ 8,098 ​ $ (6,906) ​ $ 1,192 ​ Other comprehensive (loss) income before reclassification ​ 1,636 ​ 1,100 ​ 2,736 ​ (927) ​ 1,810 ​ 883 ​ Total other comprehensive income (loss) ​ 12,221 ​ (12,428) ​ (207) ​ 7,171 ​ (5,096) ​ 2,075 ​ Reclassification for net gains recorded in net income ​ ​ — ​ ​ — ​ ​ — ​ ​ (251) ​ ​ — ​ ​ (251) ​ Ending balance, December 31 ​ $ 12,221 ​ $ (12,428) ​ $ (207) ​ $ 6,920 ​ $ (5,096) ​ $ 1,824 ​ (a) All amounts are net of tax. Amounts in parentheses indicate debits.

INVESTMENT AND MORTGAGE-BACKED

INVESTMENT AND MORTGAGE-BACKED SECURITIES	3 Months Ended
	Dec. 31, 2020
INVESTMENT AND MORTGAGE-BACKED SECURITIES
INVESTMENT AND MORTGAGE-BACKED SECURITIES	4. INVESTMENT AND MORTGAGE-BACKED SECURITIES The amortized cost and fair value of investment and mortgage-backed securities, with gross unrealized gains and losses, are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ ​ ​ ​ ​ Gross ​ Gross ​ ​ ​ ​ ​ Amortized ​ Unrealized ​ Unrealized ​ Fair ​ Cost Gains Losses Value ​ ​ (Dollars in Thousands) Securities Available for Sale: ​ ​ ​ ​ ​ ​ ​ ​ U.S. government and agency obligations ​ $ 22,209 ​ $ 148 ​ $ — ​ $ 22,357 State and political subdivisions ​ 78,693 ​ 3,150 ​ (553) ​ 81,290 Mortgage-backed securities - U.S. government agencies ​ ​ 203,786 ​ ​ 8,910 ​ ​ (30) ​ ​ 212,666 Corporate debt securities ​ 80,737 ​ 4,264 ​ (410) ​ 84,591 Total debt securities available for sale ​ $ 385,425 ​ $ 16,472 ​ $ (993) ​ $ 400,904 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Securities Held to Maturity: ​ ​ ​ ​ U.S. government and agency obligations ​ $ 1,000 ​ $ 223 ​ $ — ​ $ 1,223 State and political subdivisions ​ 18,049 ​ 911 ​ — ​ 18,960 Mortgage-backed securities - U.S. government agencies ​ 3,541 ​ 288 ​ — ​ 3,829 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total securities held to maturity ​ $ 22,590 ​ $ 1,422 ​ $ — ​ $ 24,012 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2020 ​ ​ ​ ​ ​ Gross ​ Gross ​ ​ ​ ​ ​ Amortized ​ Unrealized ​ Unrealized ​ Fair ​ Cost Gains Losses Value ​ ​ (Dollars in Thousands) Securities Available for Sale: ​ ​ ​ ​ ​ ​ ​ ​ U.S. government and agency obligations ​ $ 22,241 ​ $ 153 ​ $ — ​ $ 22,394 State and political subdivisions ​ ​ 79,099 ​ 1,940 ​ (1,418) ​ 79,621 Mortgage-backed securities - U.S. government agencies ​ 226,863 ​ ​ 9,774 ​ ​ (71) ​ ​ 236,566 Corporate debt securities ​ 78,764 ​ 3,564 ​ (545) ​ 81,783 Total debt securities ​ $ 406,967 ​ $ 15,431 ​ $ (2,034) ​ $ 420,364 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Securities Held to Maturity: ​ ​ ​ ​ U.S. government and agency obligations ​ $ 1,000 ​ $ 236 ​ $ — ​ $ 1,236 State and political subdivisions ​ 18,076 ​ 925 ​ — ​ 19,001 Mortgage-backed securities - U.S. government agencies ​ 3,784 ​ 309 ​ — ​ 4,093 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total securities held to maturity ​ $ 22,860 ​ $ 1,470 ​ $ — ​ $ 24,330 ​ The Company recognized a holding gain on equity securities of $11,000 for the three months ended December 31, 2020 and a holding loss on equity securities of $18,000 during the three months ended December 31, 2019. ​ As of December 31, 2020, the Bank maintained $183.9 million of securities in a safekeeping account at the FHLB of Pittsburgh available to be used for collateral and convenience. As of December 31, 2020, the Bank was only required to hold $90.6 million as specific collateral for its borrowings from the FHLB of Pittsburgh; therefore the $93.3 million of excess securities as of such date were not restricted and could be sold or transferred if needed. The following table shows the gross unrealized losses and related fair values of the Company’s investment and mortgage-backed securities, aggregated by investment category and length of time that individual securities had been in a continuous loss position as of December 31, 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Less than 12 months ​ More than 12 months ​ Total ​ ​ Gross ​ ​ ​ ​ Gross ​ ​ ​ ​ Gross ​ ​ ​ ​ ​ Unrealized ​ Fair ​ Unrealized ​ Fair ​ Unrealized ​ Fair ​ Losses Value Losses Value Losses Value ​ (Dollars in Thousands) Securities Available for Sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ State and political subdivisions ​ $ — ​ $ — ​ $ (553) ​ $ 21,401 ​ $ (553) ​ $ 21,401 Mortgage-backed securities -U.S. government agencies ​ (30) ​ 20,648 ​ — ​ — ​ (30) ​ 20,648 Corporate debt securities ​ (410) ​ 8,590 ​ — ​ — ​ (410) ​ 8,590 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total securities available for sale ​ $ (440) ​ $ 29,238 ​ $ (553) ​ $ 21,401 ​ $ (993) ​ $ 50,639 ​ The following table shows the gross unrealized losses and related fair values of the Company’s investment securities, aggregated by investment category and length of time that individual securities had been in a continuous loss position as of September 30, 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Less than 12 months ​ More than 12 months ​ Total ​ ​ Gross ​ ​ ​ ​ Gross ​ ​ ​ ​ Gross ​ ​ ​ ​ Unrealized Fair Unrealized Fair Unrealized Fair ​ ​ Losses ​ Value ​ Losses ​ Value ​ Losses ​ Value ​ ​ (Dollars in Thousands) Securities Available for Sale: ​ ​ ​ ​ ​ ​ ​ ​ State and political subdivisions ​ $ (126) ​ $ 10,735 ​ $ (1,292) ​ $ 24,510 ​ $ (1,418) ​ $ 35,245 Mortgage-backed securities - US government agencies ​ (66) ​ 10,025 ​ (5) ​ 584 ​ (71) ​ 10,609 Corporate debt securities ​ (545) ​ 16,472 ​ — ​ — ​ (545) ​ 16,472 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total securities available for sale ​ $ (737) ​ $ 37,232 ​ $ (1,297) ​ $ 25,094 ​ $ (2,034) ​ $ 62,326 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Management evaluates securities for other-than-temporary impairment (“OTTI”) at least once each quarter, and more frequently when economic or market concerns warrant such evaluation. The evaluation is based upon factors such as the creditworthiness of the issuers/guarantors, the underlying collateral, if applicable, and the continuing performance of the securities. Management also evaluates other facts and circumstances that may be indicative of an OTTI condition. This includes, but is not limited to, an evaluation of the type of security, the length of time and extent to which the fair value of the security has been less than cost, and the near-term prospects of the issuer. The Company assesses whether a credit loss exists with respect to a security by considering whether (1) the Company has the intent to sell the security, (2) it is more likely than not that it will be required to sell the security before recovery has occurred, or (3) it does not expect to recover the entire amortized cost basis of the security. The Company bifurcates the OTTI impact on impaired securities where impairment in value is deemed to be other than temporary between the component representing credit loss and the component representing loss related to other factors. The portion of the fair value decline attributable to credit loss must be recognized through a charge to earnings. The credit component is determined by comparing the present value of the cash flows expected to be collected, discounted at the rate in effect before recognizing any OTTI, with the amortized cost basis of the debt security. The Company uses the cash flows expected to be realized from the security, which includes assumptions about interest rates, timing and severity of defaults, estimates of potential recoveries, the cash flow distribution from the security and other factors, then applies a discount rate equal to the effective yield of the security. The difference between the present value of the expected cash flows and the amortized book value is considered a credit loss. The fair value of the security is determined using the same expected cash flows; the discount rate is a rate the Company determines from open market and other sources as appropriate for the particular security. The difference between the fair value and the security’s remaining amortized cost is recognized in other comprehensive income (loss). For the three months ended December 31, 2020 and 2019, the Company did not record any credit losses on investment securities through earnings. Mortgage-Backed Securities – Corporate Debt Securities State and political subdivisions The amortized cost and fair value of debt securities, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. The maturity table below excludes mortgage-backed securities because the contractual maturities of such securities are not indicative of actual maturities due to significant prepayments. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ ​ Held to Maturity ​ Available for Sale ​ Amortized Fair Amortized Fair ​ ​ Cost ​ Value ​ Cost ​ Value ​ ​ (Dollars in Thousands) Due after one through five years ​ $ 6,716 ​ $ 7,393 ​ $ 31,215 ​ $ 32,974 Due after five through ten years ​ 8,285 ​ 8,485 ​ 50,706 ​ 52,907 Due after ten years ​ 4,048 ​ 4,305 ​ 99,718 ​ 102,357 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 19,049 ​ $ 20,183 ​ $ 181,639 ​ $ 188,238 ​ During the three month period ended December 31, 2020, the Company sold no securities. During the three month period ended December 31, 2019, the Company sold securities with an aggregate amortized cost of $17.5 million , for a recognized aggregate gain of $318,000 (pre-tax).

LOANS RECEIVABLE

LOANS RECEIVABLE	3 Months Ended
	Dec. 31, 2020
LOANS RECEIVABLE
LOANS RECEIVABLE	5. LOANS RECEIVABLE Loans receivable consist of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ September 30, ​ ​ 2020 2020 ​ ​ ​ (Dollars in Thousands) ​ One-to-four family residential ​ $ 245,292 ​ $ 233,872 ​ Multi-family residential ​ 32,019 ​ 31,100 ​ Commercial real estate ​ 140,378 ​ 139,943 ​ Construction and land development ​ 257,723 ​ 260,648 ​ Loans to financial institutions ​ — ​ 6,000 ​ Commercial business ​ 21,923 ​ 12,916 ​ Leases ​ 127 ​ 176 ​ Consumer ​ 525 ​ 604 ​ ​ ​ ​ ​ ​ ​ ​ ​ Total loans ​ 697,987 ​ 685,259 ​ ​ ​ ​ ​ ​ ​ ​ ​ Undisbursed portion of loans-in-process ​ (82,726) ​ (86,862) ​ Deferred loan fees ​ (1,060) ​ (1,794) ​ Allowance for loan losses ​ (8,318) ​ (8,303) ​ ​ ​ ​ ​ ​ ​ ​ ​ Net loans ​ $ 605,883 ​ $ 588,300 ​ ​ The following table summarizes by loan segment the balance in the allowance for loan losses and the loans individually and collectively evaluated for impairment by loan segment at December 31, 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to ​ ​ ​ ​ ​ ​ Loans to ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ four- ​ Multi-family ​ Commercial ​ Construction and ​ financial ​ Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ family residential ​ residential ​ real estate ​ land development ​ institutions ​ business ​ Leases ​ Consumer ​ Unallocated ​ Total ​ ​ (Dollars in Thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Individually evaluated for impairment ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ ​ ​ $ — Collectively evaluated for impairment ​ ​ 2,011 ​ ​ 457 ​ ​ 1,935 ​ ​ 2,828 ​ ​ — ​ ​ 319 ​ ​ 3 ​ ​ 6 ​ ​ 759 ​ ​ 8,318 Total ending allowance balance ​ $ 2,011 ​ $ 457 ​ $ 1,935 ​ $ 2,828 ​ $ — ​ $ 319 ​ $ 3 ​ $ 6 ​ $ 759 ​ $ 8,318 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Individually evaluated for impairment ​ $ 3,086 ​ $ — ​ $ 1,329 ​ $ 8,425 ​ $ — ​ $ — ​ $ — ​ $ — ​ ​ ​ ​ $ 12,840 Collectively evaluated for impairment ​ 242,206 ​ 32,019 ​ 139,049 ​ 249,298 ​ — ​ 21,923 ​ 127 ​ 525 ​ ​ ​ ​ 685,147 Total loans ​ $ 245,292 ​ $ 32,019 ​ $ 140,378 ​ $ 257,723 ​ $ — ​ $ 21,923 ​ $ 127 ​ $ 525 ​ ​ ​ ​ $ 697,987 ​ The following table summarizes by loan segment the balance in the allowance for loan losses and the loans individually and collectively evaluated for impairment by loan segment at September 30, 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans to ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ four- ​ Multi-family ​ Commercial ​ Construction and ​ financial ​ Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ family residential residential real estate land development institutions ​ business Leases Consumer ​ Unallocated Total ​ ​ (Dollars in Thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Individually evaluated for impairment ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ ​ ​ $ — Collectively evaluated for impairment ​ ​ 1,877 ​ ​ 460 ​ ​ 1,989 ​ ​ 2,888 ​ ​ 89 ​ ​ 194 ​ ​ 3 ​ ​ 6 ​ ​ 797 ​ ​ 8,303 Total ending allowance balance ​ $ 1,877 ​ $ 460 ​ $ 1,989 ​ $ 2,888 ​ $ 89 ​ $ 194 ​ $ 3 ​ $ 6 ​ $ 797 ​ $ 8,303 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Individually evaluated for impairment ​ $ 3,095 ​ $ — ​ $ 1,417 ​ $ 8,525 ​ $ — ​ $ — ​ $ — ​ $ — ​ ​ ​ ​ $ 13,037 Collectively evaluated for impairment ​ 230,777 ​ 31,100 ​ 138,526 ​ 252,123 ​ 6,000 ​ 12,916 ​ 176 ​ 604 ​ ​ ​ ​ 672,222 Total loans ​ $ 233,872 ​ $ 31,100 ​ $ 139,943 ​ $ 260,648 ​ $ 6,000 ​ $ 12,916 ​ $ 176 ​ $ 604 ​ ​ ​ ​ $ 685,259 ​ The loan portfolio is segmented at a level that allows management to monitor both risk and performance. Management evaluates for potential impairment all construction loans, multi-family loans, commercial real estate loans, commercial business loans, loans to financial institutions, leases and all loans and leases more than 90 days delinquent as to principal and/or interest. Loans are considered to be impaired when, based on current information and events, it is probable that the Company will be unable to collect in full the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Once the determination is made that a loan is impaired, the determination of whether a specific allocation of the allowance is necessary is generally measured by comparing the recorded investment in the loan to the fair value of the loan using one of the following three methods: (a) the present value of the expected future cash flows discounted at the loan’s effective interest rate; (b) the loan’s observable market price; or (c) the fair value of the collateral less selling costs. Management primarily utilizes the fair value of collateral method as a practically expedient alternative. On collateral method evaluations, any portion of the loan deemed uncollectible is charged-off against the loan loss allowance. The following table presents impaired loans by class as of December 31, 2020, segregated by those for which a specific allowance was required and those for which no specific allowance was required. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Impaired ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans with ​ ​ ​ ​ ​ ​ ​ ​ Impaired Loans with ​ No Specific ​ ​ ​ ​ ​ ​ Specific Allowance ​ Allowance ​ Total Impaired Loans ​ ​ (Dollars in Thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unpaid ​ ​ Recorded ​ Related ​ Recorded ​ Recorded ​ Principal ​ Investment Allowance Investment Investment Balance One-to-four family residential ​ $ — ​ $ — ​ $ 3,086 ​ $ 3,086 ​ $ 3,402 Commercial real estate ​ — ​ — ​ 1,329 ​ 1,329 ​ 1,506 Construction and land development ​ — ​ — ​ 8,425 ​ 8,425 ​ 10,806 Total ​ $ — ​ $ — ​ $ 12,840 ​ $ 12,840 ​ $ 15,714 ​ The following table presents impaired loans by class as of September 30, 2020, segregated by those for which a specific allowance was required and those for which no specific allowance was required. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Impaired ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans with ​ ​ ​ ​ ​ ​ Impaired Loans with ​ No Specific ​ ​ ​ ​ ​ ​ ​ ​ Specific Allowance Allowance Total Impaired Loans ​ ​ (Dollars in Thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unpaid ​ ​ Recorded Related Recorded Recorded Principal ​ Investment Allowance Investment Investment Balance One-to-four family residential ​ $ — ​ $ — ​ $ 3,095 ​ $ 3,095 ​ $ 3,482 Commercial real estate ​ — ​ — ​ 1,417 ​ 1,417 ​ 1,600 Construction and land development ​ — ​ — ​ 8,525 ​ 8,525 ​ 10,906 Total ​ $ — ​ $ — ​ $ 13,037 ​ $ 13,037 ​ $ 15,988 ​ The following tables present the average recorded investment in impaired loans and related interest income recognized for the periods indicated: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended December 31, 2020 ​ ​ Average ​ ​ ​ ​ Income ​ ​ Recorded ​ Income Recognized ​ Recognized on ​ Investment on Accrual Basis Cash Basis ​ ​ (Dollars in Thousands) One-to-four family residential ​ $ 3,091 ​ $ 5 ​ $ — Commercial real estate ​ 1,373 ​ — ​ — Construction and land development ​ 8,475 ​ — ​ — Total impaired loans ​ $ 12,939 ​ $ 5 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended December 31, 2019 ​ ​ Average ​ ​ ​ ​ Income ​ ​ Recorded ​ Income Recognized ​ Recognized on ​ Investment on Accrual Basis Cash Basis ​ ​ (Dollars in Thousands) One-to-four family residential ​ $ 4,593 ​ $ 3 ​ $ 9 Multi-family residential ​ 148 ​ — ​ — Commercial real estate ​ 1,769 ​ — ​ 1 Construction and land development ​ 8,750 ​ — ​ — Consumer ​ 31 ​ — ​ — Total impaired loans ​ $ 15,291 ​ $ 3 ​ $ 10 ​ ​ ​ Federal regulations and our loan policy require that the Company utilize an internal asset classification system as a means of reporting problem and potential problem assets. The Company has incorporated an internal asset classification system, consistent with Federal banking regulations, as a part of its credit monitoring system. Management currently classifies problem and potential problem assets as “special mention”, “substandard,” “doubtful” or “loss” assets. An asset is considered “substandard” if it is inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged, if any. “Substandard” assets include those characterized by the “distinct possibility” that the insured institution will sustain “some loss” if the deficiencies are not corrected. Assets classified as “doubtful” have all of the weaknesses inherent in those classified “substandard” with the added characteristic that the weaknesses present make “collection or liquidation in full,” on the basis of currently existing facts, conditions, and values, “highly questionable and improbable.” Assets classified as “loss” are those considered “uncollectible” and of such little value that their continuance as assets without the establishment of a specific loss reserve is not warranted. Assets which do not currently expose the insured institution to sufficient risk to warrant classification in one of the three aforementioned categories but possess weaknesses are required to be designated “special mention.” The following tables present the classes of the loan portfolio in which a formal risk weighting system is utilized summarized by the aggregate “Pass” and the criticized category of “special mention”, and the classified categories of “substandard”, “doubtful” and “loss” within the Company’s risk rating system as applied to the loan portfolio. The Company had no loans classified as “doubtful” or “loss” at either of the dates presented. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ ​ ​ ​ Special ​ ​ ​ ​ ​ ​ ​ Total ​ Pass Mention Substandard Doubtful Loans ​ ​ (Dollars in Thousands) One-to-four residential ​ $ 240,781 ​ $ 1,425 ​ $ 3,086 ​ $ — ​ $ 245,292 Multi-family residential ​ 32,019 ​ — ​ — ​ — ​ 32,019 Commercial real estate ​ 129,213 ​ 9,836 ​ 1,329 ​ — ​ 140,378 Construction and land development ​ 249,298 ​ — ​ 8,425 ​ — ​ 257,723 Commercial business ​ 21,923 ​ — ​ — ​ — ​ 21,923 Total ​ $ 673,234 ​ $ 11,261 ​ $ 12,840 ​ $ — ​ $ 697,335 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2020 ​ ​ Special ​ ​ ​ ​ ​ Total ​ Pass Mention Substandard Doubtful Loans ​ ​ (Dollars in Thousands) One-to-four residential ​ $ 229,361 ​ $ 1,416 ​ $ 3,095 ​ $ — ​ $ 233,872 Multi-family residential ​ 31,100 ​ — ​ — ​ — ​ 31,100 Commercial real estate ​ 128,527 ​ 9,999 ​ 1,417 ​ — ​ 139,943 Construction and land development ​ 252,123 ​ — ​ 8,525 ​ — ​ 260,648 Loans to financial institutions ​ ​ 6,000 ​ — ​ — ​ — ​ 6,000 Commercial business ​ 12,916 ​ — ​ — ​ — ​ 12,916 Total ​ $ 660,027 ​ $ 11,415 ​ $ 13,037 ​ $ — ​ $ 684,479 ​ The Company evaluates the classification of one-to-four family residential, leases and consumer loans primarily on a pooled basis. If the Company becomes aware that adverse or distressed conditions exist that may affect a particular loan, the loan is downgraded following the above definitions of special mention, substandard, doubtful and loss. The following tables represent loans in which a formal risk rating system is not utilized, but loans are segregated between performing and non-performing based primarily on delinquency status. Non-performing loans that would be included in the table are those loans greater than 90 days past due as to principal and/or interest that do not have a designated risk rating. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ ​ Non- Total ​ ​ Performing ​ Performing ​ Loans ​ ​ (Dollars in Thousands) Leases ​ $ 127 ​ $ — ​ $ 127 Consumer ​ 525 ​ — ​ 525 Total ​ $ 652 ​ $ — ​ $ 652 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2020 ​ ​ ​ Non- Total ​ ​ Performing ​ Performing ​ Loans ​ ​ (Dollars in Thousands) Leases ​ $ 176 ​ $ — ​ $ 176 Consumer ​ 604 ​ — ​ 604 Total ​ $ 780 ​ $ — ​ $ 780 ​ Management further monitors the performance and credit quality of the loan portfolio by analyzing the age of the portfolio as determined by the length of time a recorded payment is due or overdue, as the case may be. The following tables present the loan categories of the loan portfolio summarized by the aging categories of performing loans, delinquent loans and nonaccrual loans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 90 Days+ ​ ​ ​ ​ ​ 30 ‑ 89 Days ​ 90 Days + ​ Total ​ Total ​ Non- ​ Past Due ​ ​ Current ​ Past Due ​ Past Due ​ Past Due ​ Loans ​ Accrual ​ and Accruing ​ ​ (Dollars in Thousands) One-to-four family residential $ 241,013 ​ $ 1,408 ​ $ 2,871 ​ $ 4,279 ​ $ 245,292 ​ $ 3,086 ​ $ — Multi-family residential ​ 32,019 ​ — ​ — ​ — ​ 32,019 ​ — ​ — Commercial real estate ​ 136,787 ​ 2,262 ​ 1,329 ​ 3,591 ​ 140,378 ​ 1,329 ​ — Construction and land development ​ 249,298 ​ — ​ 8,425 ​ 8,425 ​ 257,723 ​ 8,425 ​ — Commercial business ​ 21,923 ​ — ​ — ​ — ​ 21,923 ​ — ​ — Leases ​ 127 ​ — ​ — ​ — ​ 127 ​ — ​ Consumer ​ 525 ​ — ​ — ​ — ​ 525 ​ — ​ — Total Loans ​ $ 681,692 ​ $ 3,670 ​ $ 12,625 ​ $ 16,295 ​ $ 697,987 ​ $ 12,840 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2020 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 90 Days+ ​ ​ ​ ​ ​ 30 ‑ 89 Days ​ 90 Days + ​ Total ​ Total ​ Non- ​ Past Due ​ ​ Current ​ Past Due ​ Past Due ​ Past Due ​ Loans ​ Accrual ​ and Accruing ​ ​ (Dollars in Thousands) One-to-four family residential ​ $ 231,196 ​ $ 523 ​ $ 2,153 ​ $ 2,676 ​ $ 233,872 ​ $ 3,095 ​ $ — Multi-family residential ​ 31,100 ​ — ​ — ​ — ​ 31,100 ​ — ​ — Commercial real estate ​ 136,225 ​ 2,301 ​ 1,417 ​ 3,718 ​ 139,943 ​ 1,417 ​ — Construction and land development ​ 252,123 ​ — ​ 8,525 ​ 8,525 ​ 260,648 ​ 8,525 ​ — Commercial business ​ 12,916 ​ — ​ — ​ — ​ 12,916 ​ — ​ — Loans to financial institutions ​ ​ 6,000 ​ — ​ — ​ — ​ 6,000 ​ — ​ — Leases ​ 176 ​ — ​ — ​ — ​ 176 ​ — ​ Consumer ​ 604 ​ — ​ — ​ — ​ 604 ​ — ​ — Total Loans ​ $ 670,340 ​ $ 2,824 ​ $ 12,095 ​ $ 14,919 ​ $ 685,259 ​ $ 13,037 ​ $ — ​ The allowance for loan losses is established through a provision for loan losses charged to expense. The Company maintains the allowance at a level believed to cover all known and inherent losses in the portfolio that are both probable and reasonable to estimate at each reporting date. Management reviews the allowance for loan losses no less than quarterly in order to identify these inherent losses and to assess the overall collection probability for the loan portfolio in view of these inherent losses. For each primary type of loan, a loss factor is established reflecting an estimate of the known and inherent losses in such loan type contained in the portfolio using both a quantitative analysis as well as consideration of qualitative factors. The evaluation process includes, among other things, an analysis of delinquency trends, non-performing loan trends, the level of charge-offs and recoveries, prior loss experience, total loans outstanding, the volume of loan originations, the type, size and geographic concentration of the Company’s loans, the value of collateral securing the loans, the borrowers’ ability to repay and repayment performance, the number of loans requiring heightened management oversight, local economic conditions and industry experience. For the three months ended December 31, 2020 the analysis took into account the pandemic and its effects on the Company's business, especially with respect to commercial real estate, commercial business and construction and land development loans. Commercial real estate loans entail significant additional credit risks compared to owner-occupied one-to-four family residential mortgage loans, as they generally involve large loan balances concentrated with a single borrower or groups of related borrowers. In addition, the payment experience on loans secured by income-producing properties typically depends on the successful operation of the related real estate project and/or business operation of the borrower who is, in some cases, also the primary occupant, and thus may be subject to a greater extent to the effects of adverse conditions in the real estate market and in the economy in general. Commercial business loans typically involve a higher risk of default than residential loans of like duration since their repayment is generally dependent on the successful operation of the borrower’s business and the sufficiency of collateral, if any. Land acquisition, development and construction lending exposes the Company to greater credit risk than permanent mortgage financing. The repayment of land acquisition, development and construction loans depends upon the sale of the property to third parties and/or the availability of permanent financing upon completion of all improvements. These events may adversely affect the sale of the properties, potentially reducing both the borrowers’ ability to make required payments as well as reducing the value of the collateral property. Such lending is additionally subject to the risk that if the estimate of construction cost proves to be inaccurate, the Company potentially will be compelled to advance additional funds to allow completion of the project. In addition, if the estimate of value proves to be inaccurate, the Company may be confronted with a project, when completed, having less value than the loan amount. If the Company is forced to foreclose on a construction project prior to completion, there is no assurance that the Company would be able to recover the entire unpaid portion of the loan. The following tables summarize the primary segments of the allowance for loan losses. Activity in the allowance is presented for the three month periods ended December 31, 2020 and 2019: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended December 31, 2020 ​ One- to Multi- ​ ​ Construction ​ ​ Loans to ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ four-family ​ family ​ Commercial ​ and land ​ Commercial ​ financial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ residential ​ residential ​ real estate ​ development ​ business ​ institutions ​ Leases ​ Consumer ​ Unallocated ​ Total ​ ​ (In Thousands) ALLL balance at September 30, 2020 ​ $ 1,877 ​ $ 460 ​ $ 1,989 ​ $ 2,888 ​ $ 194 ​ $ 89 ​ $ 3 ​ $ 6 ​ $ 797 ​ $ 8,303 Charge-offs ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Recoveries ​ ​ 1 ​ ​ — ​ ​ — ​ ​ — ​ ​ 14 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 15 Provision ​ ​ 133 ​ ​ (3) ​ ​ (54) ​ ​ (60) ​ ​ 111 ​ ​ (89) ​ ​ — ​ ​ — ​ ​ (38) ​ ​ — ALLL balance at December 31, 2020 ​ $ 2,011 ​ $ 457 ​ $ 1,935 ​ $ 2,828 ​ $ 319 ​ $ — ​ $ 3 ​ $ 6 ​ $ 759 ​ $ 8,318 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended December 31, 2019 ​ One- to Multi- ​ ​ Construction ​ ​ Loans to ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ four-family ​ family ​ Commercial ​ and land ​ Commercial ​ financial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ residential ​ residential ​ real estate ​ development ​ business ​ institutions ​ Leases ​ Consumer ​ Unallocated ​ Total ​ ​ (In Thousands) ​ ​ ​ ALLL balance at September 30, 2019 ​ $ 1,002 ​ $ 315 ​ $ 1,257 ​ $ 2,034 ​ $ 206 ​ $ 63 ​ $ 5 ​ $ 13 ​ $ 498 ​ $ 5,393 Charge-offs ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Recoveries ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 10 ​ ​ — ​ ​ — ​ ​ 10 Provision ​ ​ (3) ​ ​ (60) ​ ​ 24 ​ ​ 171 ​ ​ (5) ​ ​ — ​ ​ (11) ​ ​ (1) ​ ​ 10 ​ ​ 125 ALLL balance at December 31, 2019 ​ $ 999 ​ $ 255 ​ $ 1,281 ​ $ 2,205 ​ $ 201 ​ $ 63 ​ $ 4 ​ $ 12 ​ $ 508 ​ $ 5,528 ​ The Company recorded no provision for loan losses for the three months period ended December 31, 2020, compared to a provision of $125,000 for loan losses for the three months period in fiscal 2019. During the quarter ended December 31, 2020, the Company recorded no charge offs and recoveries of $15,000. During the quarter ended December 31, 2019, the Company recorded no charge offs and recoveries of $10,000. At December 31, 2020, the Company had four loans aggregating $4.9 million that were classified as TDRs. Three of the TDRs, totaling $4.5 million, which are on non-accrual, are a part of a troubled lending relationship totaling $10.5 million. The remaining TDR is also on non-accrual and consists of a $403,000 loan secured by a single-family property; the loan is performing in accordance with the restructured terms. The Company did not restructure any loans, as a TDR, during the three months ended December 31, 2020, or during the three months ending December 31, 2019. No TDRs defaulted during the three month periods ending December 31, 2020 or 2019.

DEPOSITS

DEPOSITS	3 Months Ended
	Dec. 31, 2020
DEPOSITS [Abstract]
DEPOSITS	6. DEPOSITS Deposits consist of the following major classifications: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ September 30, ​ ​ ​ 2020 ​ 2020 ​ ​ Amount Percent Amount Percent ​ ​ ​ (Dollars in Thousands) ​ Non-interest-bearing checking accounts ​ $ 28,820 3.9 % $ 30,002 3.9 % ​ Interest-bearing checking accounts ​ 96,396 12.9 % 135,797 17.6 % ​ Money market deposit accounts ​ 116,256 15.5 % 111,105 14.4 % ​ Passbook, club and statement savings ​ 227,035 30.3 % 224,435 29.1 % ​ Certificates maturing in six months or less ​ 141,956 19.0 % 125,165 16.2 % ​ Certificates maturing in more than six months ​ 137,996 18.4 % 144,445 18.8 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 748,459 100.0 % $ 770,949 100.0 % ​ ​ Certificates in the amount of $250,000 and over totaled $75.9 million as of December 31, 2020 and $76.6 million as of September 30, 2020.

ADVANCES FROM FEDERAL HOME LOAN

ADVANCES FROM FEDERAL HOME LOAN BANK - SHORT TERM	3 Months Ended
	Dec. 31, 2020
ADVANCES FROM FEDERAL HOME LOAN BANK - SHORT TERM
ADVANCES FROM FEDERAL HOME LOAN BANK - SHORT TERM	7. ADVANCES FROM FEDERAL HOME LOAN BANK – SHORT TERM As of December 31, 2020 and September 30, 2020 outstanding balances and related information regarding short-term borrowings from the FHLB are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, September 30, ​ (Dollar Amounts in Thousands) 2020 2020 ​ Balance at year-end ​ $ 25,000 ​ $ 25,000 ​ ​ Weight-average rate at year-end ​ 0.39 % 0.39 % ​ ​ As of December 31, 2020 and September 30, 2020, the $25.0 million of borrowings consisted of one 90-day FHLB advance associated with an interest rate swap contract. The Bank maintains borrowing facilities with the FHLB of Pittsburgh, Atlantic Community Bankers Bank (“ACBB”) and the Federal Reserve Bank of Philadelphia, the terms and interest rates of which are subject to change on the date of execution of borrowings. Available borrowings are based on collateral with the facility. The Bank maintains unsecured borrowing facilities with ACBB and PNC for $12.5 million and $10.0 million, respectively. There were no draws on either facility as of December 31, 2020.

ADVANCES FROM FEDERAL HOME LO_2

ADVANCES FROM FEDERAL HOME LOAN BANK - LONG TERM	3 Months Ended
	Dec. 31, 2020
ADVANCES FROM FEDERAL HOME LOAN BANK - LONG TERM
ADVANCES FROM FEDERAL HOME LOAN BANK - LONG TERM	8. ADVANCES FROM FEDERAL HOME LOAN BANK – LONG TERM Pursuant to collateral agreements with the FHLB of Pittsburgh, advances are secured by a blanket collateral of loans held by the Bank and qualifying fixed-income securities and FHLB stock. The long-term advances outstanding as of December 31, 2020 and September 30, 2020 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Lomg-term FHLB advances: ​ Maturity range ​ Weighted average ​ Stated interest rate range ​ December 31, ​ September 30, Description from to interest rate from to 2020 2020 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in Thousands) Fixed Rate - Amortizing 1 ‑ Oct ‑ 20 30 ‑ Sep ‑ 21 ​ 2.79 % 2.64 % 2.83 % $ 3,076 ​ $ 5,179 Fixed Rate - Amortizing 1 ‑ Oct ‑ 21 30 ‑ Sep ‑ 22 ​ 2.86 % 1.99 % 3.05 % 4,707 ​ 5,523 Fixed Rate - Amortizing 1 ‑ Oct ‑ 22 30 ‑ Sep ‑ 23 ​ 2.89 % 1.94 % 3.11 % 4,842 ​ 5,265 Total ​ 2.85 % ​ ​ 12,625 ​ ​ 15,967 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fixed Rate - Advances 1 ‑ Oct ‑ 20 30 ‑ Sep ‑ 21 ​ 2.30 % 1.42 % 2.35 % ​ 15,996 ​ ​ 17,996 Fixed Rate - Advances 1 ‑ Oct ‑ 21 30 ‑ Sep ‑ 22 ​ 2.31 % 1.94 % 3.23 % 63,282 ​ 63,293 Fixed Rate - Advances 1 ‑ Oct ‑ 22 30 ‑ Sep ‑ 23 ​ 2.52 % 2.00 % 3.22 % 94,999 ​ 94,999 Fixed Rate - Advances 1 ‑ Oct ‑ 23 30 ‑ Sep ‑ 24 ​ 2.88 % 2.38 % 3.20 % 67,998 ​ 67,998 Total ​ 2.55 % ​ ​ 242,275 ​ ​ 244,286 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2.57 % ​ Total ​ $ 254,900 ​ $ 260,253 ​

DERIVATIVES

DERIVATIVES	3 Months Ended
	Dec. 31, 2020
INTEREST RATE SWAP AGREEMENTS
DERIVATIVES	9. DERIVATIVES The Bank has contracted with a third party to participate in interest rate swap contracts. There were thirteen cash flow hedges tied to wholesale funding at both December 31, 2020 and September 30, 2020. These interest rate swaps involve the receipt of variable-rate amounts from a counterparty in exchange for the Company making fixed-rate payments. During the quarter ended December 31, 2020, $2,000 of income was recognized as ineffectiveness through earnings, while $4,000 of expense was recognized as ineffectiveness through earnings during the comparable period in fiscal 2019. There were nine interest rate swaps designated as fair value hedges involving the receipt of variable-rate payments from a counterparty in exchange for the Company making fixed-rate payments over the life of the agreements that were applicable to three loans and seven investment securities as of both December 31, 2020 and September 30, 2020. There was $26.3 million on deposit with the counterparty as collateral for the hedges at December 31, 2020. The fair value is recorded in the other liabilities section of the statement of financial condition. Below is a summary of the interest rate swap agreements and their terms as of December 31, 2020. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 Hedged ​ Notional ​ Pay Rate ​ Receive ​ Maturity Date ​ Unrealized Item Amount from to Rate from to ​ Gain (Loss) (Dollars in Thousands) State and political subdivisions ​ $ 21,570 ​ 3.06 % 3.07 % 3 Mth Libor ​ 1-Feb-27 ​ 1-May-28 ​ $ (3,501) Commercial loans ​ 23,656 4.10 % 5.74 % 1 Mth Libor +225 to 276 bp ​ 13-Jun-25 ​ 1-Aug-26 ​ — 30 day wholesale funding ​ ​ 90,000 ​ 1.36 % 2.70 % 1 Mth Libor ​ 15-Feb-24 ​ 12-Jun-26 ​ ​ (5,563) 90 day wholesale funding ​ ​ 135,000 ​ 2.51 % 2.78 % 3 Mth Libor ​ 11-Jan-24 ​ 27-Mar-24 ​ ​ (10,168) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ (19,232) ​ Below is a summary of the interest rate swap agreements and their terms as of September 30, 2020. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 Hedged ​ Notional ​ Pay Rate ​ Receive ​ Maturity Date ​ Unrealized Item Amount from to Rate from to Gain (Loss) (Dollars in T housands) State and political subdivisions ​ $ 21,570 ​ 3.06 % 3.07 % 3 Mth Libor ​ 1-Feb-27 ​ 1-May-28 ​ $ (3,834) Commercial loans ​ 23,656 4.10 % 5.74 % 1 Mth Libor +225 to 276 bp ​ 13-Jun-25 ​ 1-Aug-26 ​ — 30 day wholesale funding ​ ​ 90,000 ​ 1.36 % 2.70 % 1 Mth Libor ​ 15-Feb-24 ​ 12-Jun-26 ​ ​ (6,157) 90 day wholesale funding ​ ​ 135,000 ​ 2.51 % 2.78 % 3 Mth Libor ​ 11-Jan-24 ​ 27-Mar-24 ​ ​ (10,969) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ (20,960) ​ All interest swaps are carried at fair value in accordance with FASB ASC 815 “Derivatives and Hedging.”

INCOME TAXES

INCOME TAXES	3 Months Ended
	Dec. 31, 2020
INCOME TAXES
INCOME TAXES	10. INCOME TAXES Items that gave rise to significant portions of deferred income taxes are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ September 30, ​ ​ 2020 2020 ​ ​ ​ (Dollars in Thousands) ​ Deferred tax assets: ​ ​ ​ Allowance for loan losses ​ $ 2,058 ​ $ 2,071 ​ Nonaccrual interest ​ 590 ​ 561 ​ Accrued vacation ​ 16 ​ 16 ​ Capital loss carryforward ​ 4 ​ 4 ​ Split dollar life insurance ​ 9 ​ 9 ​ Post-retirement benefits ​ 71 ​ 72 ​ Realized loss on equity securities ​ — ​ 3 ​ Unrealized losses on interest rate swaps ​ ​ 3,301 ​ ​ 3,596 ​ Deferred compensation ​ 784 ​ 781 ​ Goodwill ​ 55 ​ 58 ​ Lease liability ​ ​ 285 ​ ​ — ​ Other ​ 89 ​ 48 ​ Employee benefit plans ​ 201 ​ 187 ​ Total deferred tax assets ​ 7,463 ​ 7,406 ​ Valuation allowance ​ (4) ​ (4) ​ Total deferred tax assets, net of valuation allowance ​ 7,459 ​ 7,402 ​ ​ ​ ​ ​ Deferred tax liabilities: ​ ​ ​ Property ​ 195 ​ 137 ​ Right of Use ​ ​ 261 ​ ​ — ​ Realized gain on equity securities ​ ​ 9 ​ ​ — ​ Unrealized gains on available for sale securities ​ ​ 3,259 ​ ​ 2,813 ​ Purchase accounting adjustments ​ 341 ​ 321 ​ Deferred loan fees ​ 343 ​ 229 ​ Total deferred tax liabilities ​ 4,408 ​ 3,500 ​ Net deferred tax assets ​ $ 3,051 ​ $ 3,902 ​ ​ The Company establishes a valuation allowance for deferred tax assets when management believes that the use of the deferred tax assets is not likely to be fully realized through future reversals of existing taxable temporary differences and/or, to a lesser extent, future taxable income. The tax deduction generated by the redemption of the shares of a mutual fund held by the Bank and the subsequent impairment charge on the assets acquired through the redemption in kind are considered capital losses and can only be utilized to the extent of capital gains recognized over a five year period, resulting in the establishment of a valuation allowance for the carryforward period. The valuation allowance totaled $4,000 at both December 31, 2020 and September 30, 2020. There is currently no liability for uncertain tax positions and no known unrecognized tax benefits. The Company recognizes, when applicable, interest and penalties related to unrecognized tax benefits in the provision for income taxes in the Consolidated Statements of Operations as a component of income tax expense. The Company’s federal and state income tax returns for taxable years through September 30, 2016 have been closed for purposes of examination by the Internal Revenue Service and the Pennsylvania Department of Revenue.

STOCK COMPENSATION PLANS

STOCK COMPENSATION PLANS	3 Months Ended
	Dec. 31, 2020
STOCK COMPENSATION PLANS
STOCK COMPENSATION PLANS	11. STOCK COMPENSATION PLANS The Company maintains the 2008 Recognition and Retention Plan (“RRP”) which is administered by a committee of the Board of Directors of the Company. The RRP provides for the grant of shares of common stock of the Company to officers, employees and directors of the Company. In order to fund the grant of shares under the RRP, the RRP purchased 213,528 shares (on a converted basis) of the Company’s common stock in the open market for an aggregating cost of approximately $2.5 million, at an average purchase price per share of $11.49. The Company made sufficient contributions to the RRP to fund these purchases. During February 2015, shareholders approved the 2014 Stock Incentive Plan (the “2014 SIP”). As part of the 2014 SIP, a maximum of 285,655 shares of common stock can be awarded as restricted stock awards or units, of which 233,500 shares were awarded during February 2015. In August 2016, the Company granted 7,473 awards covering shares under the RRP and 3,027 shares under the 2014 SIP. In March 2017, the Company granted awards covering 17,128 shares under the 2014 SIP. In March 2018, the Company granted awards covering 8,209 shares under the RRP and 18,291 shares under the 2014 SIP. Shares subject to awards under either plan generally vest at the rate of 20% per year over five years. No further grants may be made pursuant to the RRP in accordance with its terms. Compensation expense related to the shares subject to restricted stock awards granted is recognized ratably over the five-year vesting period in an amount which totals the grant date fair value multiplied by the number of shares subject to the grant. During the three months ended December 31, 2020, an aggregate of $43,000 was recognized in compensation expense for the grants pursuant to the RRP and the 2014 SIP. During the three months ended December 31, 2019, $136,000 was recognized in compensation expense for the grants pursuant to the RRP and the 2014 SIP. At December 31, 2020, approximately $280,000 in additional compensation expense for unvested shares awarded related to the RRP and 2014 SIP remained unrecognized. A summary of the Company’s non-vested stock award activity for the three months ended December 31, 2020 is presented in the following table: ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ December 31, 2020 ​ ​ Number of ​ Weighted Average ​ Shares Grant Date Fair Value Non-vested stock awards at October 1, 2020 23,056 ​ $ 17.78 Granted — ​ — Forfeited — ​ — Vested — ​ — Non-vested stock awards at December 31, 2020 23,056 ​ $ 17.78 ​ The Company maintains the 2008 Stock Option Plan (the “Option Plan”) which authorizes the grant of stock options to officers, employees and directors of the Company to acquire shares of common stock with an exercise price at least equal to the fair market value of the common stock on the grant date. Options generally become vested and exercisable at the rate of 20% per year over five years and are generally exercisable for a period of ten years after the grant date. A total of 533,808 shares (on a converted basis) of common stock were approved for future issuance pursuant to the Option Plan. As of September 30, 2018, all of the options had been awarded under the Option Plan. The 2014 SIP reserved up to 714,145 shares for issuance pursuant to options. Options to purchase 605,000 shares were awarded during February 2015 pursuant to the 2014 SIP. During August 2016, the Company granted options covering 18,866 shares under the Option Plan and 8,634 shares under the 2014 SIP. In March 2017, the Company granted options covering 22,828 shares under the 2014 SIP. In May 2017, the Company granted options covering 25,000 shares under the 2014 SIP and 283 shares under the Option Plan. In March 2018, the Company granted options covering 159,265 shares under the 2014 SIP and 18,235 shares under the Option Plan. In July 2019, the Company granted options covering 39,702 shares under the 2014 SIP. In September 2020, the Company granted 12,500 shares under the 2014 SIP. No further grants may be made pursuant to the Option Plan. A summary of the status of the Company’s stock options under the Option Plan and the 2014 SIP as of December 31, 2020 is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ December 31, 2020 ​ Number of Weighted Average ​ ​ Shares ​ Exercise Price Options outstanding at October 1, 2020 571,258 ​ $ 14.58 Granted — ​ — Exercised — ​ — Forfeited — ​ — Outstanding at December 31, 2020 571,258 ​ $ 14.58 Exercisable at the December 31, 2020 397,465 ​ $ 13.45 ​ The weighted average remaining contractual term was approximately 5.9 years for options outstanding as of December 31, 2020. The estimated fair value of options granted during fiscal 2009 was $2.98 per share, $2.92 for options granted during fiscal 2010, $3.34 for options granted during fiscal 2013, $4.67 for the options granted during fiscal 2014, $4.58 for options granted during fiscal 2015, $2.13 for options granted during fiscal 2016, $3.18 for options granted during fiscal 2017, $3.63 for options granted during fiscal 2018, $3.38 for options granted in fiscal 2019 and $2.31 for options granted in 2020. The fair value for grants made in fiscal 2017 was estimated on the date of grant using the Black-Scholes pricing model with the following assumptions: an exercise and fair value of $17.43, term of seven years, volatility rate of 14.37%, interest rate of 2.22% and a yield rate of 0.69%. The fair value for grants made in fiscal 2018 was estimated on the date of grant using the Black-Scholes pricing model with the following assumptions: an exercise and fair value of $18.46, term of seven years, volatility rate of 15.90%, interest rate of 2.82% and a yield rate of 1.08%. The fair value for grants made in fiscal 2019 was estimated on the date of grant using the Black-Scholes pricing model with the following assumptions: an exercise and fair value of $18.16, term of seven years, volatility rate of 17.76%, interest rate of 1.87% and a yield rate of 1.10%. The fair value for grants made in fiscal 2020 was estimated on the date of grant using the Black-Scholes pricing model with the following assumptions: an exercise and fair value of $10.00, term of seven years, volatility rate of 33.22%, interest rate of 0.41% and a yield rate of 2.80%. During the three months ended December 31, 2020 and 2019, $43,000 and $229,000, respectively, was recognized in compensation expense for options granted pursuant to the Option Plan and the 2014 SIP. At December 31, 2020, there was approximately $380,000 in additional compensation expense to be recognized for awarded options which remained outstanding and unvested at such date. The weighted average period over which this expense will be recognized is approximately 2.6 years.

COMMITMENTS AND CONTINGENT LIAB

COMMITMENTS AND CONTINGENT LIABILITIES	3 Months Ended
	Dec. 31, 2020
COMMITMENTS AND CONTINGENT LIABILITIES
COMMITMENTS AND CONTINGENT LIABILITIES	12. COMMITMENTS AND CONTINGENT LIABILITIES At December 31, 2020, the Company had $69.1 million in outstanding commitments to originate loans with market interest rates ranging from 3.25% to 5.00%. At September 30, 2020, the Company had $29.9 million in outstanding commitments to originate loans with market interest rates ranging from 3.25% to 4.75%. The aggregate undisbursed portion of loans-in-process amounted to $82.7 million at December 31, 2020 and $86.9 million at September 30, 2020. The Company also had commitments under unused lines of credit of $34.5 million as of December 31, 2020 and $40.1 million as of September 30, 2020 and letters of credit outstanding of $1.1 million as of December 31, 2020 and $1.1 million as of September 30, 2020. Among the Company’s contingent liabilities are exposures to limited recourse arrangements with respect to the Company’s sales of whole loans and participation interests. At December 31, 2020, the exposure, which represents a portion of credit risk associated with the interests sold, amounted to $1.0 million. This exposure is for the life of the related loans and payables, on our proportionate share, as actual losses are incurred. The Company is involved in various legal proceedings occurring in the ordinary course of business. Management of the Company, based on discussions with litigation counsel, believes that such proceedings will not have a material adverse effect on the financial condition, operations or cash flows of the Company. However, there can be no assurance that any of the outstanding legal proceedings to which the Company is a party will not be decided adversely to the Company’s interests and not have a material adverse effect on the financial condition and operations of the Company.

FAIR VALUE MEASUREMENT

FAIR VALUE MEASUREMENT	3 Months Ended
	Dec. 31, 2020
FAIR VALUE MEASUREMENT
FAIR VALUE MEASUREMENT	13. FAIR VALUE MEASUREMENT The fair value estimates presented herein are based on pertinent information available to management as of December 31, 2020 and September 30, 2020, respectively. Although management is not aware of any factors that would significantly affect the fair value amounts, such amounts have not been comprehensively revalued for purposes of these financial statements since that date and, therefore, current estimates of fair value may differ significantly from the amounts presented herein. Generally accepted accounting principles used in the United States establish a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimizes the use of unobservable inputs when measuring fair value. The standard describes three levels of inputs that may be used to measure fair value. The three broad levels of hierarchy are as follows: Level 1 Quoted prices in active markets for identical assets or liabilities. Level 2 Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3 Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities; Level 3 assets and liabilities include financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation. Those assets and liabilities as of December 31, 2020 which are measured at fair value on a recurring basis are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Category Used for Fair Value Measurement ​ Level 1 Level 2 Level 3 Total ​ ​ (Dollars in Thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Assets: ​ ​ ​ ​ ​ ​ ​ ​ Securities available for sale: ​ ​ ​ ​ ​ ​ ​ ​ U.S. Government and agency obligations ​ $ — ​ $ 22,357 ​ $ — ​ $ 22,357 State and political subdivisions ​ — ​ 81,290 ​ — ​ 81,290 Mortgage-backed securities - U.S. Government agencies ​ — ​ 212,666 ​ — ​ 212,666 Corporate bonds ​ — ​ 84,591 ​ — ​ 84,591 Equity securities ​ 62 ​ — ​ — ​ 62 Total ​ $ 62 ​ $ 400,904 ​ $ — ​ $ 400,966 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest rate swap contracts ​ $ — ​ $ 19,232 ​ $ — ​ $ 19,232 Total ​ $ — ​ $ 19,232 ​ $ — ​ $ 19,232 ​ Those assets and liabilities as of September 30, 2020 which are measured at fair value on a recurring basis are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Category Used for Fair Value Measurement ​ Level 1 Level 2 Level 3 Total ​ ​ (Dollars in Thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Assets: ​ ​ ​ ​ ​ ​ ​ ​ Securities available for sale: ​ ​ ​ ​ ​ ​ ​ ​ U.S. Government and agency obligations ​ $ — ​ $ 22,394 ​ $ — ​ $ 22,394 State and political subdivisions ​ ​ — ​ 79,621 ​ — ​ 79,621 Mortgage-backed securities - U.S. Government agencies ​ — ​ 236,566 ​ — ​ 236,566 Corporate bonds ​ — ​ 81,783 ​ — ​ 81,783 Equity securities ​ 51 ​ — ​ — ​ 51 Total ​ $ 51 ​ $ 420,364 ​ $ — ​ $ 420,415 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest rate swap contracts ​ $ — ​ $ 20,960 ​ $ — ​ $ 20,960 Total ​ $ — ​ $ 20,960 ​ $ — ​ $ 20,960 ​ The fair value of financial instruments has been determined by the Company using available market information and appropriate valuation methodologies. However, considerable judgment is necessarily required to interpret market data to develop the estimates of fair value. Accordingly, the estimates presented herein are not necessarily indicative of the amounts the Company could realize in a current market exchange. The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements at ​ ​ Carrying ​ Fair ​ December 31, 2020 ​ Amount Value (Level 1) (Level 2) (Level 3) ​ ​ (Dollars in Thousands) ​ ​ ​ Assets: ​ ​ ​ ​ ​ Investment and mortgage-backed securities held to maturity ​ $ 22,590 ​ $ 24,012 ​ $ — ​ $ 24,012 ​ $ — Loans receivable, net ​ ​ 605,883 ​ ​ 607,763 ​ ​ — ​ ​ — ​ ​ 607,763 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Certificates of deposit ​ ​ 279,952 ​ ​ 288,137 ​ ​ 288,137 ​ ​ — ​ ​ — Advances from FHLB -long-term ​ ​ 254,900 ​ ​ 267,966 ​ ​ 267,966 ​ ​ — ​ ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements at ​ ​ Carrying ​ Fair ​ September 30, 2020 ​ Amount Value (Level 1) (Level 2) (Level 3) ​ ​ (Dollars in Thousands) ​ ​ ​ Assets: ​ ​ ​ ​ ​ Investment and mortgage-backed securities held to maturity ​ $ 22,860 ​ $ 24,330 ​ $ — ​ $ 24,330 ​ $ — Loans receivable, net ​ ​ 588,300 ​ ​ 593,768 ​ ​ ​ ​ ​ ​ ​ ​ 593,768 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Certificates of deposit ​ ​ 269,610 ​ ​ 278,224 ​ ​ 278,224 ​ ​ — ​ ​ — Advances from FHLB -long-term ​ ​ 260,253 ​ ​ 274,172 ​ ​ 274,172 ​ ​ — ​ ​ — ​

GOODWILL AND OTHER INTANGIBLE A

GOODWILL AND OTHER INTANGIBLE ASSETS	3 Months Ended
	Dec. 31, 2020
GOODWILL AND OTHER INTANGIBLE ASSETS
GOODWILL AND OTHER INTANGIBLE ASSETS	14. GOODWILL AND OTHER INTANGIBLE ASSETS The Company’s goodwill and intangible assets are related to the acquisition of Polonia Bancorp, Inc. on January 1, 2017. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance ​ ​ ​ ​ ​ ​ ​ Balance ​ ​ ​ ​ October 1, ​ Additions/ ​ ​ ​ ​ December 31, ​ Amortization ​ 2020 Adjustments Amortization 2020 Period ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in Thousands) ​ ​ Goodwill ​ $ 6,102 ​ $ — ​ $ — ​ $ 6,102 Core deposit intangible ​ 340 ​ — ​ (26) ​ 314 10 years ​ ​ $ 6,442 ​ $ — ​ $ (26) ​ $ 6,416 ​ As of December 31, 2020, the current fiscal year and the future fiscal periods amortization expense for the core deposit intangible is: ​ ​ ​ ​ ​ (in Thousands) ​ ​ ​ ​ ​ ​ 2021 ​ $ 67 2022 ​ 78 2023 ​ 64 2024 ​ 49 2025 ​ 34 Thereafter ​ 22 ​ ​ $ 314 ​

LEASES

LEASES	3 Months Ended
	Dec. 31, 2020
LEASES [Abstract]
LEASES	15. LEASES Operating leases in which the Company is the lessee are recorded as operating lease Right of Use ("ROU") assets and operating lease liabilities, included in other assets and other liabilities, respectively, on the consolidated statement of financial condition. The Company does not currently have any finance leases. Operating lease ROU assets represent the right to use an underlying asset during the lease term and operating lease liabilities represent the obligation to make lease payments arising from the lease. ROU assets and operating lease liabilities are recognized as of the date of adoption of ASU2016-02 based on the present value of the remaining lease payments using a discount rate that represents the Company's incremental borrowing rate at the date of initial application. Operating lease expense, which is comprised of amortization of the ROU assets and the implicit interest accreted on the operating lease liability, is recognized on a straight line basis over the lease term of the operating lease, and is recorded in office occupancy expense in the consolidated statements of operations. The leases relate to Bank branches with remaining lease terms of generally five As of December 31, 2020, operating lease ROU assets were $1.3 million and operating lease liabilities were $1.4 million. Operating lease costs of $53,000 were recognized for the three month period ended December 31, 2020. The following table summarizes other information related to our operating leases: ​ ​ ​ ​ ​ December 31, 2020 ​ ​ Weighted-average remaining lease term - operating leases in years 7.10 ​ Weighted-average discount rate - operating leases 2.0 % ​ The following table presents aggregate lease maturities and obligations as of December 31, 2020: ​ ​ ​ ​ ​ (Dollars in Thousands) ​ ​ ​ ​ ​ ​ 2021 ​ $ 157 2022 ​ 213 2023 ​ 216 2024 ​ 220 2025 ​ 231 2025 and thereafter ​ ​ 423 Total lease payments ​ ​ 1,460 Less: interest ​ 102 Present value of lease liabilities ​ $ 1,358 ​

SUMMARY OF SIGNIFICANT ACCOUN_2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	3 Months Ended
	Dec. 31, 2020
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Basis of presentation	Basis of presentation –
Use of Estimates in the Preparation of Financial Statements	Use of Estimates in the Preparation of Financial Statements —
Recently Adopted Accounting Pronouncements	Recent Accounting Pronouncements Not Yet Adopted In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments Update for SEC filers that are eligible to be smaller reporting companies, non-SEC filers, and all other companies to fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. We expect to recognize a one-time cumulative effect adjustment to the allowance for loan losses as of the beginning of the first reporting period in which the new standard is effective, but cannot yet determine the magnitude of any such one-time adjustment or the overall impact of the new guidance on the consolidated financial statements. In May 2019, the FASB issued ASU 2019-05, Financial Instruments – Credit Losses, Topic 326, which allows entities to irrevocably elect the fair value option for certain financial assets previously measured at amortized cost upon adoption of the new credit losses standard. To be eligible for the transition election, the existing financial asset must otherwise be both within the scope of the new credit losses standard and eligible for the applying the fair value option in ASC 825-10-3. The election must be applied on an instrument-by-instrument basis and is not available for either available-for-sale or held-to-maturity debt securities. For entities that elect the fair value option, the difference between the carrying amount and the fair value of the financial asset would be recognized through a cumulative-effect adjustment to opening retained earnings as of the date an entity adopted ASU 2016-13. Changes in fair value of that financial asset would subsequently be reported in current earnings. For entities that have not yet adopted ASU 2016-13, the effective dates and transition requirements are the same as those in ASU 2016-13. The Company is currently evaluating the impact the adoption of the standard will have on the Company’s financial position and or results of operations. In November 2019, the FASB issued ASU 2019-10, Financial Instruments ‒ Credit Losses (Topic 326), Derivatives and Hedging (Topic 815), and Leases (Topic 842) In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740) ​ In January 2020, the FASB issued ASU 2020-4, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting, March 2020, to provide temporary optional expedients and exceptions to the U.S. GAAP guidance on contract modifications and hedge accounting to ease the financial reporting burdens of the expected market transition from LIBOR and other interbank offered rates to alternative reference rates, such as Secured Overnight Financing Rate. Entities can elect not to apply certain modification accounting requirements to contracts affected by what the guidance calls reference rate reform, if certain criteria are met. An entity that makes this election would not have to remeasure the contracts at the modification date or reassess a previous accounting determination. Also, entities can elect various optional expedients that would allow them to continue applying hedge accounting for hedging relationships affected by reference rate reform, if certain criteria are met, and can make a one-time election to sell and/or reclassify held-to-maturity debt securities that reference an interest rate affected by reference rate reform. The amendments in this ASU are effective for all entities upon issuance through December 31, 2022. The Company is currently evaluating the impact the adoption of the standard will have on the Company’s financial position and/or results of operations. ​ In October 2020, the FASB issued ASU 2020-09, Debt (Topic 470): Amendments to SEC Paragraphs Pursuant to SEC Release No. 33-10762 ​ In October 2020, the FASB issued ASU 2020-10, Codification Improvements ​ In November 2020, the FASB issued ASU 2020-11, Financial Services – Insurance (Topic 944), Financial Services— Insurance: Targeted Improvements to the Accounting for Long-Duration Contracts ​ In January 2021, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848) ​ ​

EARNINGS PER SHARE (Tables)

EARNINGS PER SHARE (Tables)	3 Months Ended
	Dec. 31, 2020
EARNINGS PER SHARE
Schedule of basic and diluted earnings per share	The calculated basic and diluted earnings per share are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended December 31, ​ ​ ​ 2020 ​ 2019 ​ ​ ​ (Dollars in Thousands Except Per Share Data) ​ ​ Basic Diluted Basic Diluted ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income ​ $ 1,837 ​ $ 1,837 ​ $ 2,463 ​ $ 2,463 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted average common shares outstanding ​ 8,104,713 ​ 8,104,713 ​ 8,755,165 ​ 8,755,165 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Effect of CSEs ​ — ​ 21,077 ​ — ​ 170,827 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Adjusted weighted average common shares used in earnings per share computation ​ 8,104,713 ​ 8,125,790 ​ 8,755,165 ​ 8,925,992 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Earnings per share ​ $ 0.23 ​ $ 0.23 ​ $ 0.28 ​ $ 0.28 ​ ​

ACCUMULATED OTHER COMPREHENSI_2

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables)	3 Months Ended
	Dec. 31, 2020
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) [Abstract]
Schedule of changes in accumulated other comprehensive (loss) income	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended December 31, ​ Three Months Ended December 31, ​ ​ ​ 2020 ​ 2020 ​ 2020 ​ 2019 ​ 2019 ​ 2019 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ ​ ​ ​ ​ ​ ​ Total ​ ​ ​ ​ ​ ​ ​ ​ ​ accumulated ​ ​ ​ ​ ​ ​ ​ accumulated ​ ​ ​ Unrealized gain ​ Unrealized gain (loss) ​ other ​ Unrealized gain ​ Unrealized gain (loss) ​ other ​ ​ ​ (loss) on AFS ​ on interest rate swaps ​ comprehensive ​ (loss) on AFS ​ on interest rate swaps ​ comprehensive ​ ​ securities (a) (a) income (loss) securities (a) (a) income (loss) ​ Beginning balance, October 1 ​ $ 10,585 ​ $ (13,528) ​ $ (2,943) ​ $ 8,098 ​ $ (6,906) ​ $ 1,192 ​ Other comprehensive (loss) income before reclassification ​ 1,636 ​ 1,100 ​ 2,736 ​ (927) ​ 1,810 ​ 883 ​ Total other comprehensive income (loss) ​ 12,221 ​ (12,428) ​ (207) ​ 7,171 ​ (5,096) ​ 2,075 ​ Reclassification for net gains recorded in net income ​ ​ — ​ ​ — ​ ​ — ​ ​ (251) ​ ​ — ​ ​ (251) ​ Ending balance, December 31 ​ $ 12,221 ​ $ (12,428) ​ $ (207) ​ $ 6,920 ​ $ (5,096) ​ $ 1,824 ​ (a) All amounts are net of tax. Amounts in parentheses indicate debits.

INVESTMENT AND MORTGAGE-BACKE_2

INVESTMENT AND MORTGAGE-BACKED SECURITIES (Tables)	3 Months Ended
	Dec. 31, 2020
INVESTMENT AND MORTGAGE-BACKED SECURITIES
Schedule of amortized cost and fair value of securities, with gross unrealized gains and losses	The amortized cost and fair value of investment and mortgage-backed securities, with gross unrealized gains and losses, are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ ​ ​ ​ ​ Gross ​ Gross ​ ​ ​ ​ ​ Amortized ​ Unrealized ​ Unrealized ​ Fair ​ Cost Gains Losses Value ​ ​ (Dollars in Thousands) Securities Available for Sale: ​ ​ ​ ​ ​ ​ ​ ​ U.S. government and agency obligations ​ $ 22,209 ​ $ 148 ​ $ — ​ $ 22,357 State and political subdivisions ​ 78,693 ​ 3,150 ​ (553) ​ 81,290 Mortgage-backed securities - U.S. government agencies ​ ​ 203,786 ​ ​ 8,910 ​ ​ (30) ​ ​ 212,666 Corporate debt securities ​ 80,737 ​ 4,264 ​ (410) ​ 84,591 Total debt securities available for sale ​ $ 385,425 ​ $ 16,472 ​ $ (993) ​ $ 400,904 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Securities Held to Maturity: ​ ​ ​ ​ U.S. government and agency obligations ​ $ 1,000 ​ $ 223 ​ $ — ​ $ 1,223 State and political subdivisions ​ 18,049 ​ 911 ​ — ​ 18,960 Mortgage-backed securities - U.S. government agencies ​ 3,541 ​ 288 ​ — ​ 3,829 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total securities held to maturity ​ $ 22,590 ​ $ 1,422 ​ $ — ​ $ 24,012 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2020 ​ ​ ​ ​ ​ Gross ​ Gross ​ ​ ​ ​ ​ Amortized ​ Unrealized ​ Unrealized ​ Fair ​ Cost Gains Losses Value ​ ​ (Dollars in Thousands) Securities Available for Sale: ​ ​ ​ ​ ​ ​ ​ ​ U.S. government and agency obligations ​ $ 22,241 ​ $ 153 ​ $ — ​ $ 22,394 State and political subdivisions ​ ​ 79,099 ​ 1,940 ​ (1,418) ​ 79,621 Mortgage-backed securities - U.S. government agencies ​ 226,863 ​ ​ 9,774 ​ ​ (71) ​ ​ 236,566 Corporate debt securities ​ 78,764 ​ 3,564 ​ (545) ​ 81,783 Total debt securities ​ $ 406,967 ​ $ 15,431 ​ $ (2,034) ​ $ 420,364 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Securities Held to Maturity: ​ ​ ​ ​ U.S. government and agency obligations ​ $ 1,000 ​ $ 236 ​ $ — ​ $ 1,236 State and political subdivisions ​ 18,076 ​ 925 ​ — ​ 19,001 Mortgage-backed securities - U.S. government agencies ​ 3,784 ​ 309 ​ — ​ 4,093 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total securities held to maturity ​ $ 22,860 ​ $ 1,470 ​ $ — ​ $ 24,330 ​
Schedule of gross unrealized losses and related fair values of investment securities	The following table shows the gross unrealized losses and related fair values of the Company’s investment and mortgage-backed securities, aggregated by investment category and length of time that individual securities had been in a continuous loss position as of December 31, 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Less than 12 months ​ More than 12 months ​ Total ​ ​ Gross ​ ​ ​ ​ Gross ​ ​ ​ ​ Gross ​ ​ ​ ​ ​ Unrealized ​ Fair ​ Unrealized ​ Fair ​ Unrealized ​ Fair ​ Losses Value Losses Value Losses Value ​ (Dollars in Thousands) Securities Available for Sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ State and political subdivisions ​ $ — ​ $ — ​ $ (553) ​ $ 21,401 ​ $ (553) ​ $ 21,401 Mortgage-backed securities -U.S. government agencies ​ (30) ​ 20,648 ​ — ​ — ​ (30) ​ 20,648 Corporate debt securities ​ (410) ​ 8,590 ​ — ​ — ​ (410) ​ 8,590 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total securities available for sale ​ $ (440) ​ $ 29,238 ​ $ (553) ​ $ 21,401 ​ $ (993) ​ $ 50,639 ​ The following table shows the gross unrealized losses and related fair values of the Company’s investment securities, aggregated by investment category and length of time that individual securities had been in a continuous loss position as of September 30, 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Less than 12 months ​ More than 12 months ​ Total ​ ​ Gross ​ ​ ​ ​ Gross ​ ​ ​ ​ Gross ​ ​ ​ ​ Unrealized Fair Unrealized Fair Unrealized Fair ​ ​ Losses ​ Value ​ Losses ​ Value ​ Losses ​ Value ​ ​ (Dollars in Thousands) Securities Available for Sale: ​ ​ ​ ​ ​ ​ ​ ​ State and political subdivisions ​ $ (126) ​ $ 10,735 ​ $ (1,292) ​ $ 24,510 ​ $ (1,418) ​ $ 35,245 Mortgage-backed securities - US government agencies ​ (66) ​ 10,025 ​ (5) ​ 584 ​ (71) ​ 10,609 Corporate debt securities ​ (545) ​ 16,472 ​ — ​ — ​ (545) ​ 16,472 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total securities available for sale ​ $ (737) ​ $ 37,232 ​ $ (1,297) ​ $ 25,094 ​ $ (2,034) ​ $ 62,326 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​
Schedule of amortized cost and fair value of debt securities by contractual maturity	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ ​ Held to Maturity ​ Available for Sale ​ Amortized Fair Amortized Fair ​ ​ Cost ​ Value ​ Cost ​ Value ​ ​ (Dollars in Thousands) Due after one through five years ​ $ 6,716 ​ $ 7,393 ​ $ 31,215 ​ $ 32,974 Due after five through ten years ​ 8,285 ​ 8,485 ​ 50,706 ​ 52,907 Due after ten years ​ 4,048 ​ 4,305 ​ 99,718 ​ 102,357 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 19,049 ​ $ 20,183 ​ $ 181,639 ​ $ 188,238

LOANS RECEIVABLE (Tables)

LOANS RECEIVABLE (Tables)	3 Months Ended
	Dec. 31, 2020
LOANS RECEIVABLE
Schedule of loans receivable	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ September 30, ​ ​ 2020 2020 ​ ​ ​ (Dollars in Thousands) ​ One-to-four family residential ​ $ 245,292 ​ $ 233,872 ​ Multi-family residential ​ 32,019 ​ 31,100 ​ Commercial real estate ​ 140,378 ​ 139,943 ​ Construction and land development ​ 257,723 ​ 260,648 ​ Loans to financial institutions ​ — ​ 6,000 ​ Commercial business ​ 21,923 ​ 12,916 ​ Leases ​ 127 ​ 176 ​ Consumer ​ 525 ​ 604 ​ ​ ​ ​ ​ ​ ​ ​ ​ Total loans ​ 697,987 ​ 685,259 ​ ​ ​ ​ ​ ​ ​ ​ ​ Undisbursed portion of loans-in-process ​ (82,726) ​ (86,862) ​ Deferred loan fees ​ (1,060) ​ (1,794) ​ Allowance for loan losses ​ (8,318) ​ (8,303) ​ ​ ​ ​ ​ ​ ​ ​ ​ Net loans ​ $ 605,883 ​ $ 588,300 ​
Schedule of loans individually and collectively evaluated for impairment by loan segment	The following table summarizes by loan segment the balance in the allowance for loan losses and the loans individually and collectively evaluated for impairment by loan segment at December 31, 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to ​ ​ ​ ​ ​ ​ Loans to ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ four- ​ Multi-family ​ Commercial ​ Construction and ​ financial ​ Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ family residential ​ residential ​ real estate ​ land development ​ institutions ​ business ​ Leases ​ Consumer ​ Unallocated ​ Total ​ ​ (Dollars in Thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Individually evaluated for impairment ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ ​ ​ $ — Collectively evaluated for impairment ​ ​ 2,011 ​ ​ 457 ​ ​ 1,935 ​ ​ 2,828 ​ ​ — ​ ​ 319 ​ ​ 3 ​ ​ 6 ​ ​ 759 ​ ​ 8,318 Total ending allowance balance ​ $ 2,011 ​ $ 457 ​ $ 1,935 ​ $ 2,828 ​ $ — ​ $ 319 ​ $ 3 ​ $ 6 ​ $ 759 ​ $ 8,318 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Individually evaluated for impairment ​ $ 3,086 ​ $ — ​ $ 1,329 ​ $ 8,425 ​ $ — ​ $ — ​ $ — ​ $ — ​ ​ ​ ​ $ 12,840 Collectively evaluated for impairment ​ 242,206 ​ 32,019 ​ 139,049 ​ 249,298 ​ — ​ 21,923 ​ 127 ​ 525 ​ ​ ​ ​ 685,147 Total loans ​ $ 245,292 ​ $ 32,019 ​ $ 140,378 ​ $ 257,723 ​ $ — ​ $ 21,923 ​ $ 127 ​ $ 525 ​ ​ ​ ​ $ 697,987 ​ The following table summarizes by loan segment the balance in the allowance for loan losses and the loans individually and collectively evaluated for impairment by loan segment at September 30, 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One- to ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans to ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ four- ​ Multi-family ​ Commercial ​ Construction and ​ financial ​ Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ family residential residential real estate land development institutions ​ business Leases Consumer ​ Unallocated Total ​ ​ (Dollars in Thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Individually evaluated for impairment ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ ​ ​ $ — Collectively evaluated for impairment ​ ​ 1,877 ​ ​ 460 ​ ​ 1,989 ​ ​ 2,888 ​ ​ 89 ​ ​ 194 ​ ​ 3 ​ ​ 6 ​ ​ 797 ​ ​ 8,303 Total ending allowance balance ​ $ 1,877 ​ $ 460 ​ $ 1,989 ​ $ 2,888 ​ $ 89 ​ $ 194 ​ $ 3 ​ $ 6 ​ $ 797 ​ $ 8,303 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Individually evaluated for impairment ​ $ 3,095 ​ $ — ​ $ 1,417 ​ $ 8,525 ​ $ — ​ $ — ​ $ — ​ $ — ​ ​ ​ ​ $ 13,037 Collectively evaluated for impairment ​ 230,777 ​ 31,100 ​ 138,526 ​ 252,123 ​ 6,000 ​ 12,916 ​ 176 ​ 604 ​ ​ ​ ​ 672,222 Total loans ​ $ 233,872 ​ $ 31,100 ​ $ 139,943 ​ $ 260,648 ​ $ 6,000 ​ $ 12,916 ​ $ 176 ​ $ 604 ​ ​ ​ ​ $ 685,259
Schedule of impaired loans by class, segregated by those for which a specific allowance was required and those for which a specific allowance was not necessary	The following table presents impaired loans by class as of December 31, 2020, segregated by those for which a specific allowance was required and those for which no specific allowance was required. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Impaired ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans with ​ ​ ​ ​ ​ ​ ​ ​ Impaired Loans with ​ No Specific ​ ​ ​ ​ ​ ​ Specific Allowance ​ Allowance ​ Total Impaired Loans ​ ​ (Dollars in Thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unpaid ​ ​ Recorded ​ Related ​ Recorded ​ Recorded ​ Principal ​ Investment Allowance Investment Investment Balance One-to-four family residential ​ $ — ​ $ — ​ $ 3,086 ​ $ 3,086 ​ $ 3,402 Commercial real estate ​ — ​ — ​ 1,329 ​ 1,329 ​ 1,506 Construction and land development ​ — ​ — ​ 8,425 ​ 8,425 ​ 10,806 Total ​ $ — ​ $ — ​ $ 12,840 ​ $ 12,840 ​ $ 15,714 ​ The following table presents impaired loans by class as of September 30, 2020, segregated by those for which a specific allowance was required and those for which no specific allowance was required. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Impaired ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Loans with ​ ​ ​ ​ ​ ​ Impaired Loans with ​ No Specific ​ ​ ​ ​ ​ ​ ​ ​ Specific Allowance Allowance Total Impaired Loans ​ ​ (Dollars in Thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unpaid ​ ​ Recorded Related Recorded Recorded Principal ​ Investment Allowance Investment Investment Balance One-to-four family residential ​ $ — ​ $ — ​ $ 3,095 ​ $ 3,095 ​ $ 3,482 Commercial real estate ​ — ​ — ​ 1,417 ​ 1,417 ​ 1,600 Construction and land development ​ — ​ — ​ 8,525 ​ 8,525 ​ 10,906 Total ​ $ — ​ $ — ​ $ 13,037 ​ $ 13,037 ​ $ 15,988
Schedule of average investment in impaired loans and related interest income recognized	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended December 31, 2020 ​ ​ Average ​ ​ ​ ​ Income ​ ​ Recorded ​ Income Recognized ​ Recognized on ​ Investment on Accrual Basis Cash Basis ​ ​ (Dollars in Thousands) One-to-four family residential ​ $ 3,091 ​ $ 5 ​ $ — Commercial real estate ​ 1,373 ​ — ​ — Construction and land development ​ 8,475 ​ — ​ — Total impaired loans ​ $ 12,939 ​ $ 5 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended December 31, 2019 ​ ​ Average ​ ​ ​ ​ Income ​ ​ Recorded ​ Income Recognized ​ Recognized on ​ Investment on Accrual Basis Cash Basis ​ ​ (Dollars in Thousands) One-to-four family residential ​ $ 4,593 ​ $ 3 ​ $ 9 Multi-family residential ​ 148 ​ — ​ — Commercial real estate ​ 1,769 ​ — ​ 1 Construction and land development ​ 8,750 ​ — ​ — Consumer ​ 31 ​ — ​ — Total impaired loans ​ $ 15,291 ​ $ 3 ​ $ 10 ​ ​ ​
Schedule of classes of the loan portfolio in which a formal risk weighting system is utilized	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ ​ ​ ​ Special ​ ​ ​ ​ ​ ​ ​ Total ​ Pass Mention Substandard Doubtful Loans ​ ​ (Dollars in Thousands) One-to-four residential ​ $ 240,781 ​ $ 1,425 ​ $ 3,086 ​ $ — ​ $ 245,292 Multi-family residential ​ 32,019 ​ — ​ — ​ — ​ 32,019 Commercial real estate ​ 129,213 ​ 9,836 ​ 1,329 ​ — ​ 140,378 Construction and land development ​ 249,298 ​ — ​ 8,425 ​ — ​ 257,723 Commercial business ​ 21,923 ​ — ​ — ​ — ​ 21,923 Total ​ $ 673,234 ​ $ 11,261 ​ $ 12,840 ​ $ — ​ $ 697,335 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2020 ​ ​ Special ​ ​ ​ ​ ​ Total ​ Pass Mention Substandard Doubtful Loans ​ ​ (Dollars in Thousands) One-to-four residential ​ $ 229,361 ​ $ 1,416 ​ $ 3,095 ​ $ — ​ $ 233,872 Multi-family residential ​ 31,100 ​ — ​ — ​ — ​ 31,100 Commercial real estate ​ 128,527 ​ 9,999 ​ 1,417 ​ — ​ 139,943 Construction and land development ​ 252,123 ​ — ​ 8,525 ​ — ​ 260,648 Loans to financial institutions ​ ​ 6,000 ​ — ​ — ​ — ​ 6,000 Commercial business ​ 12,916 ​ — ​ — ​ — ​ 12,916 Total ​ $ 660,027 ​ $ 11,415 ​ $ 13,037 ​ $ — ​ $ 684,479 ​
Schedule of loans in which a formal risk rating system is not utilized, but loans are segregated between performing and non-performing based primarily on delinquency status	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ ​ Non- Total ​ ​ Performing ​ Performing ​ Loans ​ ​ (Dollars in Thousands) Leases ​ $ 127 ​ $ — ​ $ 127 Consumer ​ 525 ​ — ​ 525 Total ​ $ 652 ​ $ — ​ $ 652 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2020 ​ ​ ​ Non- Total ​ ​ Performing ​ Performing ​ Loans ​ ​ (Dollars in Thousands) Leases ​ $ 176 ​ $ — ​ $ 176 Consumer ​ 604 ​ — ​ 604 Total ​ $ 780 ​ $ — ​ $ 780
Schedule of loan categories of the loan portfolio summarized by the aging categories of performing and delinquent loans and nonaccrual loans	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 90 Days+ ​ ​ ​ ​ ​ 30 ‑ 89 Days ​ 90 Days + ​ Total ​ Total ​ Non- ​ Past Due ​ ​ Current ​ Past Due ​ Past Due ​ Past Due ​ Loans ​ Accrual ​ and Accruing ​ ​ (Dollars in Thousands) One-to-four family residential $ 241,013 ​ $ 1,408 ​ $ 2,871 ​ $ 4,279 ​ $ 245,292 ​ $ 3,086 ​ $ — Multi-family residential ​ 32,019 ​ — ​ — ​ — ​ 32,019 ​ — ​ — Commercial real estate ​ 136,787 ​ 2,262 ​ 1,329 ​ 3,591 ​ 140,378 ​ 1,329 ​ — Construction and land development ​ 249,298 ​ — ​ 8,425 ​ 8,425 ​ 257,723 ​ 8,425 ​ — Commercial business ​ 21,923 ​ — ​ — ​ — ​ 21,923 ​ — ​ — Leases ​ 127 ​ — ​ — ​ — ​ 127 ​ — ​ Consumer ​ 525 ​ — ​ — ​ — ​ 525 ​ — ​ — Total Loans ​ $ 681,692 ​ $ 3,670 ​ $ 12,625 ​ $ 16,295 ​ $ 697,987 ​ $ 12,840 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2020 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 90 Days+ ​ ​ ​ ​ ​ 30 ‑ 89 Days ​ 90 Days + ​ Total ​ Total ​ Non- ​ Past Due ​ ​ Current ​ Past Due ​ Past Due ​ Past Due ​ Loans ​ Accrual ​ and Accruing ​ ​ (Dollars in Thousands) One-to-four family residential ​ $ 231,196 ​ $ 523 ​ $ 2,153 ​ $ 2,676 ​ $ 233,872 ​ $ 3,095 ​ $ — Multi-family residential ​ 31,100 ​ — ​ — ​ — ​ 31,100 ​ — ​ — Commercial real estate ​ 136,225 ​ 2,301 ​ 1,417 ​ 3,718 ​ 139,943 ​ 1,417 ​ — Construction and land development ​ 252,123 ​ — ​ 8,525 ​ 8,525 ​ 260,648 ​ 8,525 ​ — Commercial business ​ 12,916 ​ — ​ — ​ — ​ 12,916 ​ — ​ — Loans to financial institutions ​ ​ 6,000 ​ — ​ — ​ — ​ 6,000 ​ — ​ — Leases ​ 176 ​ — ​ — ​ — ​ 176 ​ — ​ Consumer ​ 604 ​ — ​ — ​ — ​ 604 ​ — ​ — Total Loans ​ $ 670,340 ​ $ 2,824 ​ $ 12,095 ​ $ 14,919 ​ $ 685,259 ​ $ 13,037 ​ $ — ​
Schedule of primary segments of the allowance for loan losses, segmented into the amount required for loans individually evaluated for impairment and the amount required for loans collectively evaluated for impairment.	The following tables summarize the primary segments of the allowance for loan losses. Activity in the allowance is presented for the three month periods ended December 31, 2020 and 2019: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended December 31, 2020 ​ One- to Multi- ​ ​ Construction ​ ​ Loans to ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ four-family ​ family ​ Commercial ​ and land ​ Commercial ​ financial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ residential ​ residential ​ real estate ​ development ​ business ​ institutions ​ Leases ​ Consumer ​ Unallocated ​ Total ​ ​ (In Thousands) ALLL balance at September 30, 2020 ​ $ 1,877 ​ $ 460 ​ $ 1,989 ​ $ 2,888 ​ $ 194 ​ $ 89 ​ $ 3 ​ $ 6 ​ $ 797 ​ $ 8,303 Charge-offs ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Recoveries ​ ​ 1 ​ ​ — ​ ​ — ​ ​ — ​ ​ 14 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 15 Provision ​ ​ 133 ​ ​ (3) ​ ​ (54) ​ ​ (60) ​ ​ 111 ​ ​ (89) ​ ​ — ​ ​ — ​ ​ (38) ​ ​ — ALLL balance at December 31, 2020 ​ $ 2,011 ​ $ 457 ​ $ 1,935 ​ $ 2,828 ​ $ 319 ​ $ — ​ $ 3 ​ $ 6 ​ $ 759 ​ $ 8,318 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended December 31, 2019 ​ One- to Multi- ​ ​ Construction ​ ​ Loans to ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ four-family ​ family ​ Commercial ​ and land ​ Commercial ​ financial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ residential ​ residential ​ real estate ​ development ​ business ​ institutions ​ Leases ​ Consumer ​ Unallocated ​ Total ​ ​ (In Thousands) ​ ​ ​ ALLL balance at September 30, 2019 ​ $ 1,002 ​ $ 315 ​ $ 1,257 ​ $ 2,034 ​ $ 206 ​ $ 63 ​ $ 5 ​ $ 13 ​ $ 498 ​ $ 5,393 Charge-offs ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Recoveries ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 10 ​ ​ — ​ ​ — ​ ​ 10 Provision ​ ​ (3) ​ ​ (60) ​ ​ 24 ​ ​ 171 ​ ​ (5) ​ ​ — ​ ​ (11) ​ ​ (1) ​ ​ 10 ​ ​ 125 ALLL balance at December 31, 2019 ​ $ 999 ​ $ 255 ​ $ 1,281 ​ $ 2,205 ​ $ 201 ​ $ 63 ​ $ 4 ​ $ 12 ​ $ 508 ​ $ 5,528

DEPOSITS (Tables)

DEPOSITS (Tables)	3 Months Ended
	Dec. 31, 2020
DEPOSITS [Abstract]
Schedule of major classifications of deposits	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ September 30, ​ ​ ​ 2020 ​ 2020 ​ ​ Amount Percent Amount Percent ​ ​ ​ (Dollars in Thousands) ​ Non-interest-bearing checking accounts ​ $ 28,820 3.9 % $ 30,002 3.9 % ​ Interest-bearing checking accounts ​ 96,396 12.9 % 135,797 17.6 % ​ Money market deposit accounts ​ 116,256 15.5 % 111,105 14.4 % ​ Passbook, club and statement savings ​ 227,035 30.3 % 224,435 29.1 % ​ Certificates maturing in six months or less ​ 141,956 19.0 % 125,165 16.2 % ​ Certificates maturing in more than six months ​ 137,996 18.4 % 144,445 18.8 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 748,459 100.0 % $ 770,949 100.0 % ​

ADVANCES FROM FEDERAL HOME LO_3

ADVANCES FROM FEDERAL HOME LOAN BANK - SHORT TERM (Tables)	3 Months Ended
	Dec. 31, 2020
ADVANCES FROM FEDERAL HOME LOAN BANK - SHORT TERM
Schedule of short-term borrowings from the FHLB of Pittsburgh	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, September 30, ​ (Dollar Amounts in Thousands) 2020 2020 ​ Balance at year-end ​ $ 25,000 ​ $ 25,000 ​ ​ Weight-average rate at year-end ​ 0.39 % 0.39 % ​ ​

ADVANCES FROM FEDERAL HOME LO_4

ADVANCES FROM FEDERAL HOME LOAN BANK - LONG TERM (Tables)	3 Months Ended
	Dec. 31, 2020
ADVANCES FROM FEDERAL HOME LOAN BANK - LONG TERM
Schedule of collateral agreement with the FHLB	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Lomg-term FHLB advances: ​ Maturity range ​ Weighted average ​ Stated interest rate range ​ December 31, ​ September 30, Description from to interest rate from to 2020 2020 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in Thousands) Fixed Rate - Amortizing 1 ‑ Oct ‑ 20 30 ‑ Sep ‑ 21 ​ 2.79 % 2.64 % 2.83 % $ 3,076 ​ $ 5,179 Fixed Rate - Amortizing 1 ‑ Oct ‑ 21 30 ‑ Sep ‑ 22 ​ 2.86 % 1.99 % 3.05 % 4,707 ​ 5,523 Fixed Rate - Amortizing 1 ‑ Oct ‑ 22 30 ‑ Sep ‑ 23 ​ 2.89 % 1.94 % 3.11 % 4,842 ​ 5,265 Total ​ 2.85 % ​ ​ 12,625 ​ ​ 15,967 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fixed Rate - Advances 1 ‑ Oct ‑ 20 30 ‑ Sep ‑ 21 ​ 2.30 % 1.42 % 2.35 % ​ 15,996 ​ ​ 17,996 Fixed Rate - Advances 1 ‑ Oct ‑ 21 30 ‑ Sep ‑ 22 ​ 2.31 % 1.94 % 3.23 % 63,282 ​ 63,293 Fixed Rate - Advances 1 ‑ Oct ‑ 22 30 ‑ Sep ‑ 23 ​ 2.52 % 2.00 % 3.22 % 94,999 ​ 94,999 Fixed Rate - Advances 1 ‑ Oct ‑ 23 30 ‑ Sep ‑ 24 ​ 2.88 % 2.38 % 3.20 % 67,998 ​ 67,998 Total ​ 2.55 % ​ ​ 242,275 ​ ​ 244,286 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2.57 % ​ Total ​ $ 254,900 ​ $ 260,253

DERIVATIVES (Tables)

DERIVATIVES (Tables)	3 Months Ended
	Dec. 31, 2020
INTEREST RATE SWAP AGREEMENTS
Schedule of interest rate swap agreements and the terms	Below is a summary of the interest rate swap agreements and their terms as of December 31, 2020. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 Hedged ​ Notional ​ Pay Rate ​ Receive ​ Maturity Date ​ Unrealized Item Amount from to Rate from to ​ Gain (Loss) (Dollars in Thousands) State and political subdivisions ​ $ 21,570 ​ 3.06 % 3.07 % 3 Mth Libor ​ 1-Feb-27 ​ 1-May-28 ​ $ (3,501) Commercial loans ​ 23,656 4.10 % 5.74 % 1 Mth Libor +225 to 276 bp ​ 13-Jun-25 ​ 1-Aug-26 ​ — 30 day wholesale funding ​ ​ 90,000 ​ 1.36 % 2.70 % 1 Mth Libor ​ 15-Feb-24 ​ 12-Jun-26 ​ ​ (5,563) 90 day wholesale funding ​ ​ 135,000 ​ 2.51 % 2.78 % 3 Mth Libor ​ 11-Jan-24 ​ 27-Mar-24 ​ ​ (10,168) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ (19,232) ​ Below is a summary of the interest rate swap agreements and their terms as of September 30, 2020. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 Hedged ​ Notional ​ Pay Rate ​ Receive ​ Maturity Date ​ Unrealized Item Amount from to Rate from to Gain (Loss) (Dollars in T housands) State and political subdivisions ​ $ 21,570 ​ 3.06 % 3.07 % 3 Mth Libor ​ 1-Feb-27 ​ 1-May-28 ​ $ (3,834) Commercial loans ​ 23,656 4.10 % 5.74 % 1 Mth Libor +225 to 276 bp ​ 13-Jun-25 ​ 1-Aug-26 ​ — 30 day wholesale funding ​ ​ 90,000 ​ 1.36 % 2.70 % 1 Mth Libor ​ 15-Feb-24 ​ 12-Jun-26 ​ ​ (6,157) 90 day wholesale funding ​ ​ 135,000 ​ 2.51 % 2.78 % 3 Mth Libor ​ 11-Jan-24 ​ 27-Mar-24 ​ ​ (10,969) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ (20,960)

INCOME TAXES (Tables)

INCOME TAXES (Tables)	3 Months Ended
	Dec. 31, 2020
INCOME TAXES
Schedule of deferred income taxes	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ September 30, ​ ​ 2020 2020 ​ ​ ​ (Dollars in Thousands) ​ Deferred tax assets: ​ ​ ​ Allowance for loan losses ​ $ 2,058 ​ $ 2,071 ​ Nonaccrual interest ​ 590 ​ 561 ​ Accrued vacation ​ 16 ​ 16 ​ Capital loss carryforward ​ 4 ​ 4 ​ Split dollar life insurance ​ 9 ​ 9 ​ Post-retirement benefits ​ 71 ​ 72 ​ Realized loss on equity securities ​ — ​ 3 ​ Unrealized losses on interest rate swaps ​ ​ 3,301 ​ ​ 3,596 ​ Deferred compensation ​ 784 ​ 781 ​ Goodwill ​ 55 ​ 58 ​ Lease liability ​ ​ 285 ​ ​ — ​ Other ​ 89 ​ 48 ​ Employee benefit plans ​ 201 ​ 187 ​ Total deferred tax assets ​ 7,463 ​ 7,406 ​ Valuation allowance ​ (4) ​ (4) ​ Total deferred tax assets, net of valuation allowance ​ 7,459 ​ 7,402 ​ ​ ​ ​ ​ Deferred tax liabilities: ​ ​ ​ Property ​ 195 ​ 137 ​ Right of Use ​ ​ 261 ​ ​ — ​ Realized gain on equity securities ​ ​ 9 ​ ​ — ​ Unrealized gains on available for sale securities ​ ​ 3,259 ​ ​ 2,813 ​ Purchase accounting adjustments ​ 341 ​ 321 ​ Deferred loan fees ​ 343 ​ 229 ​ Total deferred tax liabilities ​ 4,408 ​ 3,500 ​ Net deferred tax assets ​ $ 3,051 ​ $ 3,902 ​

STOCK COMPENSATION PLANS (Table

STOCK COMPENSATION PLANS (Tables)	3 Months Ended
	Dec. 31, 2020
STOCK COMPENSATION PLANS
Schedule of summary of the non-vested stock award activity	​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ December 31, 2020 ​ ​ Number of ​ Weighted Average ​ Shares Grant Date Fair Value Non-vested stock awards at October 1, 2020 23,056 ​ $ 17.78 Granted — ​ — Forfeited — ​ — Vested — ​ — Non-vested stock awards at December 31, 2020 23,056 ​ $ 17.78 ​
Schedule of summary of the status of the company' stock options under the stock option plan	​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ December 31, 2020 ​ Number of Weighted Average ​ ​ Shares ​ Exercise Price Options outstanding at October 1, 2020 571,258 ​ $ 14.58 Granted — ​ — Exercised — ​ — Forfeited — ​ — Outstanding at December 31, 2020 571,258 ​ $ 14.58 Exercisable at the December 31, 2020 397,465 ​ $ 13.45 ​

FAIR VALUE MEASUREMENT (Tables)

FAIR VALUE MEASUREMENT (Tables)	3 Months Ended
	Dec. 31, 2020
FAIR VALUE MEASUREMENT
Schedule of assets measured at fair value on recurring basis	Those assets and liabilities as of December 31, 2020 which are measured at fair value on a recurring basis are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Category Used for Fair Value Measurement ​ Level 1 Level 2 Level 3 Total ​ ​ (Dollars in Thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Assets: ​ ​ ​ ​ ​ ​ ​ ​ Securities available for sale: ​ ​ ​ ​ ​ ​ ​ ​ U.S. Government and agency obligations ​ $ — ​ $ 22,357 ​ $ — ​ $ 22,357 State and political subdivisions ​ — ​ 81,290 ​ — ​ 81,290 Mortgage-backed securities - U.S. Government agencies ​ — ​ 212,666 ​ — ​ 212,666 Corporate bonds ​ — ​ 84,591 ​ — ​ 84,591 Equity securities ​ 62 ​ — ​ — ​ 62 Total ​ $ 62 ​ $ 400,904 ​ $ — ​ $ 400,966 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest rate swap contracts ​ $ — ​ $ 19,232 ​ $ — ​ $ 19,232 Total ​ $ — ​ $ 19,232 ​ $ — ​ $ 19,232 ​ Those assets and liabilities as of September 30, 2020 which are measured at fair value on a recurring basis are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Category Used for Fair Value Measurement ​ Level 1 Level 2 Level 3 Total ​ ​ (Dollars in Thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Assets: ​ ​ ​ ​ ​ ​ ​ ​ Securities available for sale: ​ ​ ​ ​ ​ ​ ​ ​ U.S. Government and agency obligations ​ $ — ​ $ 22,394 ​ $ — ​ $ 22,394 State and political subdivisions ​ ​ — ​ 79,621 ​ — ​ 79,621 Mortgage-backed securities - U.S. Government agencies ​ — ​ 236,566 ​ — ​ 236,566 Corporate bonds ​ — ​ 81,783 ​ — ​ 81,783 Equity securities ​ 51 ​ — ​ — ​ 51 Total ​ $ 51 ​ $ 420,364 ​ $ — ​ $ 420,415 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest rate swap contracts ​ $ — ​ $ 20,960 ​ $ — ​ $ 20,960 Total ​ $ — ​ $ 20,960 ​ $ — ​ $ 20,960 ​
Schedule of the estimated fair value amounts	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements at ​ ​ Carrying ​ Fair ​ December 31, 2020 ​ Amount Value (Level 1) (Level 2) (Level 3) ​ ​ (Dollars in Thousands) ​ ​ ​ Assets: ​ ​ ​ ​ ​ Investment and mortgage-backed securities held to maturity ​ $ 22,590 ​ $ 24,012 ​ $ — ​ $ 24,012 ​ $ — Loans receivable, net ​ ​ 605,883 ​ ​ 607,763 ​ ​ — ​ ​ — ​ ​ 607,763 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Certificates of deposit ​ ​ 279,952 ​ ​ 288,137 ​ ​ 288,137 ​ ​ — ​ ​ — Advances from FHLB -long-term ​ ​ 254,900 ​ ​ 267,966 ​ ​ 267,966 ​ ​ — ​ ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements at ​ ​ Carrying ​ Fair ​ September 30, 2020 ​ Amount Value (Level 1) (Level 2) (Level 3) ​ ​ (Dollars in Thousands) ​ ​ ​ Assets: ​ ​ ​ ​ ​ Investment and mortgage-backed securities held to maturity ​ $ 22,860 ​ $ 24,330 ​ $ — ​ $ 24,330 ​ $ — Loans receivable, net ​ ​ 588,300 ​ ​ 593,768 ​ ​ ​ ​ ​ ​ ​ ​ 593,768 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Certificates of deposit ​ ​ 269,610 ​ ​ 278,224 ​ ​ 278,224 ​ ​ — ​ ​ — Advances from FHLB -long-term ​ ​ 260,253 ​ ​ 274,172 ​ ​ 274,172 ​ ​ — ​ ​ —

GOODWILL AND OTHER INTANGIBLE_2

GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)	3 Months Ended
	Dec. 31, 2020
GOODWILL AND OTHER INTANGIBLE ASSETS
Schedule of goodwill and intangible assets are related to the acquisition of Polonia Bancorp	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance ​ ​ ​ ​ ​ ​ ​ Balance ​ ​ ​ ​ October 1, ​ Additions/ ​ ​ ​ ​ December 31, ​ Amortization ​ 2020 Adjustments Amortization 2020 Period ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in Thousands) ​ ​ Goodwill ​ $ 6,102 ​ $ — ​ $ — ​ $ 6,102 Core deposit intangible ​ 340 ​ — ​ (26) ​ 314 10 years ​ ​ $ 6,442 ​ $ — ​ $ (26) ​ $ 6,416
Schedule of future fiscal periods amortization expense for core deposit intangible	​ ​ ​ ​ ​ (in Thousands) ​ ​ ​ ​ ​ ​ 2021 ​ $ 67 2022 ​ 78 2023 ​ 64 2024 ​ 49 2025 ​ 34 Thereafter ​ 22 ​ ​ $ 314

LEASES (Tables)

LEASES (Tables)	3 Months Ended
	Dec. 31, 2020
LEASES [Abstract]
Schedule of information related to operating leases	The following table summarizes other information related to our operating leases: ​ ​ ​ ​ ​ December 31, 2020 ​ ​ Weighted-average remaining lease term - operating leases in years 7.10 ​ Weighted-average discount rate - operating leases 2.0 %
Schedule of aggregate lease maturities and obligations	The following table presents aggregate lease maturities and obligations as of December 31, 2020: ​ ​ ​ ​ ​ (Dollars in Thousands) ​ ​ ​ ​ ​ ​ 2021 ​ $ 157 2022 ​ 213 2023 ​ 216 2024 ​ 220 2025 ​ 231 2025 and thereafter ​ ​ 423 Total lease payments ​ ​ 1,460 Less: interest ​ 102 Present value of lease liabilities ​ $ 1,358

SUMMARY OF SIGNIFICANT ACCOUN_3

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Thousands	3 Months Ended
	Dec. 31, 2020USD ($)item	Sep. 30, 2020USD ($)
Significant Accounting Policies [Line Items]
Number of full service branch offices	9
Number of banking offices	10
Operating right-of-use assets | $	$ 1,300
Operating lease liabilities | $	1,358
Retained earnings | $	$ 54,155	$ 52,889
Philadelphia (Philadelphia County)
Significant Accounting Policies [Line Items]
Number of full service branch offices	8
PENNSYLVANIA
Significant Accounting Policies [Line Items]
Number of full service branch offices	1
Huntingdon Valley, Montgomery County
Significant Accounting Policies [Line Items]
Number of full service branch offices	1

EARNINGS PER SHARE - Calculated

EARNINGS PER SHARE - Calculated basic and diluted earnings per share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Earnings per share - basic
Net income	$ 1,837	$ 2,463
Weighted average common shares outstanding - basic	8,104,713	8,755,165
Effect of CSEs - basic	0	0
Adjusted weighted average common shares used in earnings per share computation - basic	8,104,713	8,755,165
Earnings per share - basic (in dollars per share)	$ 0.23	$ 0.28
Earnings per share - diluted
Net income	$ 1,837	$ 2,463
Weighted average shares outstanding - diluted	8,104,713	8,755,165
Effect of CSEs - diluted	21,077	170,827
Adjusted weighted average shares used in earnings per share computation - diluted	8,125,790	8,925,992
Earnings per share - diluted (in dollars per share)	$ 0.23	$ 0.28

EARNINGS PER SHARE - Additional

EARNINGS PER SHARE - Additional Information (Details) - shares	Dec. 31, 2020	Dec. 31, 2019
EARNINGS PER SHARE
Adjusted weighted average shares of common stock used in diluted earnings per share computation	282,728	550,832
Adjusted weighted average shares of common stock having exercise prices less than the current market value and are considered anti-dilutive	288,533	242,202

ACCUMULATED OTHER COMPREHENSI_3

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Changes in accumulated other comprehensive (loss) income by component net of tax (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ (2,943)
Total other comprehensive (loss) gain	2,736	$ 633
Ending Balance	(207)
Total accumulated other comprehensive income (loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(2,943)	1,192
Other comprehensive (loss) income before reclassification	2,736	883
Total other comprehensive (loss) gain	(207)	2,075
Reclassification for net gains recorded in net income	0	(251)
Ending Balance	(207)	1,824
Unrealized gain (loss) on AFS securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	10,585
Other comprehensive (loss) income before reclassification	1,636
Total other comprehensive (loss) gain	12,221
Reclassification for net gains recorded in net income	0
Ending Balance	12,221
Swaps
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(13,528)
Other comprehensive (loss) income before reclassification	1,100
Total other comprehensive (loss) gain	(12,428)
Reclassification for net gains recorded in net income	0
Ending Balance	$ (12,428)
Unrealized gains on available for sale securities and interest rate swaps
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance		(6,906)
Other comprehensive (loss) income before reclassification		1,810
Total other comprehensive (loss) gain		(5,096)
Reclassification for net gains recorded in net income		0
Ending Balance		(5,096)
Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance		8,098
Other comprehensive (loss) income before reclassification		(927)
Total other comprehensive (loss) gain		7,171
Reclassification for net gains recorded in net income		(251)
Ending Balance		$ 6,920

INVESTMENT AND MORTGAGE-BACKE_3

INVESTMENT AND MORTGAGE-BACKED SECURITIES - Amortized cost and fair value of investment and mortgage-backed securities, with gross unrealized gains and losses (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Sep. 30, 2020
Securities Available for Sale:
Amortized Cost	$ 385,425
Gross Unrealized Gains	16,472
Gross Unrealized Losses	(993)
Fair Value	400,904	$ 420,364
U.S. Government and agency obligations
Securities Available for Sale:
Amortized Cost	22,209	22,241
Gross Unrealized Gains	148	153
Gross Unrealized Losses	0
Fair Value	22,357	22,394
State and political subdivisions
Securities Available for Sale:
Amortized Cost	78,693	79,099
Gross Unrealized Gains	3,150	1,940
Gross Unrealized Losses	(553)	(1,418)
Fair Value	81,290	79,621
Mortgage-Backed Securities
Securities Available for Sale:
Amortized Cost	203,786	226,863
Gross Unrealized Gains	8,910	9,774
Gross Unrealized Losses	(30)	(71)
Fair Value	212,666	236,566
Corporate debt securities
Securities Available for Sale:
Amortized Cost	80,737	78,764
Gross Unrealized Gains	4,264	3,564
Gross Unrealized Losses	(410)	(545)
Fair Value	$ 84,591	81,783
Total debt securities available for sale
Securities Available for Sale:
Amortized Cost		406,967
Gross Unrealized Gains		15,431
Gross Unrealized Losses		(2,034)
Fair Value		$ 420,364

INVESTMENT AND MORTGAGE-BACKE_4

INVESTMENT AND MORTGAGE-BACKED SECURITIES - Amortized cost and fair value of investment and mortgage-backed securities, with gross unrealized gains and losses (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Sep. 30, 2020
Securities Held to Maturity:
Amortized Cost	$ 22,590	$ 22,860
Gross Unrealized Gains	1,422	1,470
Gross unrealized losses	0
Fair value	24,012	24,330
U.S. Government and agency obligations
Securities Held to Maturity:
Amortized Cost	1,000	1,000
Gross Unrealized Gains	223	236
Gross unrealized losses	0
Fair value	1,223	1,236
Mortgage-Backed Securities
Securities Held to Maturity:
Amortized Cost	3,541	3,784
Gross Unrealized Gains	288	309
Gross unrealized losses	0
Fair value	3,829	4,093
State and political subdivisions
Securities Held to Maturity:
Amortized Cost	18,049	18,076
Gross Unrealized Gains	911	925
Gross unrealized losses	0
Fair value	$ 18,960	$ 19,001

INVESTMENT AND MORTGAGE-BACKE_5

INVESTMENT AND MORTGAGE-BACKED SECURITIES - Gross unrealized losses and related fair values of investment securities, aggregated by investment category and length of time (Details) - USD ($)	Dec. 31, 2020	Sep. 30, 2020
Securities Available for Sale:
Less than 12 months - Gross Unrealized Losses	$ (440,000)	$ (737,000)
Less than 12 months - Fair value	29,238,000	37,232,000
More than 12 months - Gross Unrealized Losses	(553,000)	(1,297,000)
More than 12 months - Fair value	21,401,000	25,094,000
Gross Unrealized Losses - Total	(993,000)	(2,034,000)
Fair Value - Total	50,639,000	62,326,000
State and political subdivisions
Securities Available for Sale:
Less than 12 months - Gross Unrealized Losses		(126,000)
Less than 12 months - Fair value		10,735,000
More than 12 months - Gross Unrealized Losses	(553,000)	(1,292,000)
More than 12 months - Fair value	21,401,000	24,510,000
Gross Unrealized Losses - Total	(553,000)	(1,418,000)
Fair Value - Total	21,401,000	35,245,000
Mortgage-Backed Securities
Securities Available for Sale:
Less than 12 months - Gross Unrealized Losses	(30,000)	(66,000)
Less than 12 months - Fair value	20,648,000	10,025,000
More than 12 months - Gross Unrealized Losses		(5,000)
More than 12 months - Fair value		584,000
Gross Unrealized Losses - Total	(30,000)	(71,000)
Fair Value - Total	20,648,000	10,609,000
Corporate debt securities
Securities Available for Sale:
Less than 12 months - Gross Unrealized Losses	(410,000)	(545,000)
Less than 12 months - Fair value	8,590,000	16,472,000
Gross Unrealized Losses - Total	(410,000)	(545,000)
Fair Value - Total	$ 8,590,000	$ 16,472,000

INVESTMENT AND MORTGAGE-BACKE_6

INVESTMENT AND MORTGAGE-BACKED SECURITIES - Amortized cost and fair value of debt securities, by contractual maturity (Details) $ in Thousands	Dec. 31, 2020USD ($)
Available for Sale, Amortized Cost
Due after one through five years	$ 31,215
Due after five through ten years	50,706
Due after ten years	99,718
Total	181,639
Available for Sale, Fair Value
Due after one through five years	32,974
Due after five through ten years	52,907
Due after ten years	102,357
Total	$ 188,238

INVESTMENT AND MORTGAGE-BACKE_7

INVESTMENT AND MORTGAGE-BACKED SECURITIES - Amortized cost and fair value of debt securities, by contractual maturity (Details) $ in Thousands	Dec. 31, 2020USD ($)
Held to Maturity - Amortized Cost
Due after one through five years	$ 6,716
Due after five through ten years	8,285
Due after ten years	4,048
Total	19,049
Held to Maturity - Fair Value
Due after one through five years	7,393
Due after five through ten years	8,485
Due after ten years	4,305
Total	$ 20,183

INVESTMENT AND MORTGAGE-BACKE_8

INVESTMENT AND MORTGAGE-BACKED SECURITIES - Additional Information (Details)	3 Months Ended
	Dec. 31, 2020USD ($)security	Dec. 31, 2019USD ($)	Sep. 30, 2020USD ($)
Marketable Securities [Line Items]
Gain on sale of mortgage-backed securities available for sale		$ 318,000
Securities with a fair value in safekeeping account at the FHLB	$ 183,900,000
Aggregate Amount	440,000		$ 737,000
Gain (loss) on equity securities	11,000	(18,000)
Realized Investment Gains (Losses)		318,000
Proceeds from sale of investment and mortgage-backed securities		17,774,000
Required to hold securities for its borrowings	90,600,000
Excess securities not restricted and could be sold or transferred	93,300,000
Gross unrealized loss	$ 993,000		2,034,000
Mortgage-back securities sold with an aggregate amortized cost		$ 17,500,000
Mortgage-Backed Securities
Marketable Securities [Line Items]
Number of investment securities in debt obligations in the category of loss position less than 12 months held by company | security	9
Number of investment securities in debt obligations in the category of loss position more than 12 months held by company | security	0
Aggregate Amount	$ 30,000		66,000
Gross unrealized loss	$ 30,000		71,000
Corporate debt securities
Marketable Securities [Line Items]
Number of investment securities in debt obligations in the category of loss position less than 12 months held by company | security	2
Number of investment securities in debt obligations in the category of loss position more than 12 months held by company | security	0
Aggregate Amount	$ 410,000		545,000
Gross unrealized loss	$ 410,000		545,000
State and political subdivisions
Marketable Securities [Line Items]
Number of investment securities in debt obligations in the category of loss position less than 12 months held by company | security	0
Number of investment securities in debt obligations in the category of loss position more than 12 months held by company | security	7
Aggregate Amount			126,000
Gross unrealized loss	$ 553,000		$ 1,418,000

LOANS RECEIVABLE (Details)

LOANS RECEIVABLE (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 697,987	$ 685,259
Undisbursed portion of loans-in-process	(82,726)	(86,862)
Deferred loan fees	(1,060)	(1,794)
Allowance for loan losses	(8,318)	(8,303)	$ (5,528)	$ (5,393)
Net loans	605,883	588,300
One-to-four family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	245,292	233,872
Allowance for loan losses	(2,011)	(1,877)	(999)	(1,002)
Multi Family Residential (Member to be deleted from this role)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	32,019	31,100
Allowance for loan losses	(457)	(460)	(255)	(315)
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	140,378	139,943
Allowance for loan losses	(1,935)	(1,989)	(1,281)	(1,257)
Construction and Land Development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	257,723	260,648
Allowance for loan losses	(2,828)	(2,888)	(2,205)	(2,034)
Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	21,923	12,916
Allowance for loan losses	(319)	(194)	(201)	(206)
Financial institutions
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		6,000
Allowance for loan losses	0	(89)	(63)	(63)
Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	127	176
Allowance for loan losses	(3)	(3)	(4)	(5)
Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	525	604
Allowance for loan losses	$ (6)	$ (6)	$ (12)	$ (13)

LOANS RECEIVABLE - Summary of l

LOANS RECEIVABLE - Summary of loans individually and collectively evaluated for impairment by loan segment (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
Loans:
Individually evaluated for impairment	$ 12,840	$ 13,037
Collectively evaluated for impairment	685,147	672,222
Total loans	697,987	685,259
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	8,318	8,303
Total ending allowance balance	8,318	8,303	$ 5,528	$ 5,393
One-to-four family residential
Loans:
Individually evaluated for impairment	3,086	3,095
Collectively evaluated for impairment	242,206	230,777
Total loans	245,292	233,872
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	2,011	1,877
Total ending allowance balance	2,011	1,877	999	1,002
Multi Family Residential (Member to be deleted from this role)
Loans:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	32,019	31,100
Total loans	32,019	31,100
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	457	460
Total ending allowance balance	457	460	255	315
Commercial Real Estate
Loans:
Individually evaluated for impairment	1,329	1,417
Collectively evaluated for impairment	139,049	138,526
Total loans	140,378	139,943
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	1,935	1,989
Total ending allowance balance	1,935	1,989	1,281	1,257
Construction and Land Development
Loans:
Individually evaluated for impairment	8,425	8,525
Collectively evaluated for impairment	249,298	252,123
Total loans	257,723	260,648
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	2,828	2,888
Total ending allowance balance	2,828	2,888	2,205	2,034
Financial institutions
Loans:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	0	6,000
Total loans		6,000
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	0	89
Total ending allowance balance	0	89	63	63
Commercial loans
Loans:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	21,923	12,916
Total loans	21,923	12,916
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	319	194
Total ending allowance balance	319	194	201	206
Leases
Loans:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	127	176
Total loans	127	176
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	3	3
Total ending allowance balance	3	3	4	5
Consumer Loans
Loans:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	525	604
Total loans	525	604
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	6	6
Total ending allowance balance	6	6	12	13
Unallocated
Loans:
Collectively evaluated for impairment	759	797
Total ending allowance balance	$ 759	$ 797	$ 508	$ 498

LOANS RECEIVABLE - Impaired loa

LOANS RECEIVABLE - Impaired loans by class, segregated by those for which specific allowance was required and those for which specific allowance was not necessary (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Sep. 30, 2020
Financing Receivable, Impaired [Line Items]
Impaired Loans with Specific Allowance - Recorded Investment	$ 0	$ 0
Impaired Loans with Specific Allowance - Related Allowance	0	0
Impaired Loans with No Specific Allowance - Recorded Investment	12,840	13,037
Total Impaired Loans - Recorded Investment	12,840	13,037
Total impaired loans - Unpaid Principal Balance	15,714	15,988
One-to-four family residential
Financing Receivable, Impaired [Line Items]
Impaired Loans with Specific Allowance - Recorded Investment	0	0
Impaired Loans with Specific Allowance - Related Allowance	0	0
Impaired Loans with No Specific Allowance - Recorded Investment	3,086	3,095
Total Impaired Loans - Recorded Investment	3,086	3,095
Total impaired loans - Unpaid Principal Balance	3,402	3,482
Commercial Real Estate
Financing Receivable, Impaired [Line Items]
Impaired Loans with Specific Allowance - Recorded Investment	0	0
Impaired Loans with Specific Allowance - Related Allowance	0	0
Impaired Loans with No Specific Allowance - Recorded Investment	1,329	1,417
Total Impaired Loans - Recorded Investment	1,329	1,417
Total impaired loans - Unpaid Principal Balance	1,506	1,600
Construction and Land Development
Financing Receivable, Impaired [Line Items]
Impaired Loans with Specific Allowance - Recorded Investment	0	0
Impaired Loans with Specific Allowance - Related Allowance	0	0
Impaired Loans with No Specific Allowance - Recorded Investment	8,425	8,525
Total Impaired Loans - Recorded Investment	8,425	8,525
Total impaired loans - Unpaid Principal Balance	$ 10,806	$ 10,906

LOANS RECEIVABLE - Average reco

LOANS RECEIVABLE - Average recorded investment in impaired loans and related interest income recognized (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	$ 12,939	$ 15,291
Income Recognized on Accrual Basis	5	3
Income Recognized on Cash Basis	0	10
One-to-four family residential
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	3,091	4,593
Income Recognized on Accrual Basis	5	3
Income Recognized on Cash Basis	0	9
Multi Family Residential (Member to be deleted from this role)
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		148
Income Recognized on Accrual Basis		0
Income Recognized on Cash Basis		0
Commercial Real Estate
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	1,373	1,769
Income Recognized on Accrual Basis	0	0
Income Recognized on Cash Basis	0	1
Construction and Land Development
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	8,475	8,750
Income Recognized on Accrual Basis	0	0
Income Recognized on Cash Basis	$ 0	0
Consumer Loans
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		31
Income Recognized on Accrual Basis		0
Income Recognized on Cash Basis		$ 0

LOANS RECEIVABLE - Summary of c

LOANS RECEIVABLE - Summary of classes of loan portfolio in which formal risk weighting system is utilized (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Sep. 30, 2020
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 697,987	$ 685,259
One-to-four family residential
Financing Receivable, Recorded Investment [Line Items]
Total Loans	245,292	233,872
Multi Family Residential (Member to be deleted from this role)
Financing Receivable, Recorded Investment [Line Items]
Total Loans	32,019	31,100
Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total Loans	140,378	139,943
Construction and Land Development
Financing Receivable, Recorded Investment [Line Items]
Total Loans	257,723	260,648
Financial institutions
Financing Receivable, Recorded Investment [Line Items]
Total Loans		6,000
Commercial loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans	21,923	12,916
Consumer Loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans	525	604
Risk Rating System
Financing Receivable, Recorded Investment [Line Items]
Total Loans	697,335	684,479
Risk Rating System | One-to-four family residential
Financing Receivable, Recorded Investment [Line Items]
Total Loans	245,292	233,872
Risk Rating System | Multi Family Residential (Member to be deleted from this role)
Financing Receivable, Recorded Investment [Line Items]
Total Loans	32,019	31,100
Risk Rating System | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total Loans	140,378	139,943
Risk Rating System | Construction and Land Development
Financing Receivable, Recorded Investment [Line Items]
Total Loans	257,723	260,648
Risk Rating System | Financial institutions
Financing Receivable, Recorded Investment [Line Items]
Total Loans		6,000
Risk Rating System | Commercial loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans	21,923	12,916
Risk Rating System | Pass
Financing Receivable, Recorded Investment [Line Items]
Total Loans	673,234
Risk Rating System | Pass | One-to-four family residential
Financing Receivable, Recorded Investment [Line Items]
Total Loans	240,781
Risk Rating System | Pass | Multi Family Residential (Member to be deleted from this role)
Financing Receivable, Recorded Investment [Line Items]
Total Loans	32,019
Risk Rating System | Pass | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total Loans	129,213
Risk Rating System | Pass | Construction and Land Development
Financing Receivable, Recorded Investment [Line Items]
Total Loans	249,298
Risk Rating System | Pass | Commercial loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans	21,923
Risk Rating System | Special Pass
Financing Receivable, Recorded Investment [Line Items]
Total Loans		660,027
Risk Rating System | Special Pass | One-to-four family residential
Financing Receivable, Recorded Investment [Line Items]
Total Loans		229,361
Risk Rating System | Special Pass | Multi Family Residential (Member to be deleted from this role)
Financing Receivable, Recorded Investment [Line Items]
Total Loans		31,100
Risk Rating System | Special Pass | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total Loans		128,527
Risk Rating System | Special Pass | Construction and Land Development
Financing Receivable, Recorded Investment [Line Items]
Total Loans		252,123
Risk Rating System | Special Pass | Financial institutions
Financing Receivable, Recorded Investment [Line Items]
Total Loans		6,000
Risk Rating System | Special Pass | Commercial loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans		12,916
Risk Rating System | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total Loans	11,261
Risk Rating System | Special Mention | One-to-four family residential
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,425
Risk Rating System | Special Mention | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total Loans	9,836
Risk Rating System | Total Mention
Financing Receivable, Recorded Investment [Line Items]
Total Loans		11,415
Risk Rating System | Total Mention | One-to-four family residential
Financing Receivable, Recorded Investment [Line Items]
Total Loans		1,416
Risk Rating System | Total Mention | Multi Family Residential (Member to be deleted from this role)
Financing Receivable, Recorded Investment [Line Items]
Total Loans		0
Risk Rating System | Total Mention | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total Loans		9,999
Risk Rating System | Total Mention | Construction and Land Development
Financing Receivable, Recorded Investment [Line Items]
Total Loans		0
Risk Rating System | Total Mention | Financial institutions
Financing Receivable, Recorded Investment [Line Items]
Total Loans		0
Risk Rating System | Total Mention | Commercial loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans		0
Risk Rating System | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total Loans	12,840	13,037
Risk Rating System | Substandard | One-to-four family residential
Financing Receivable, Recorded Investment [Line Items]
Total Loans	3,086	3,095
Risk Rating System | Substandard | Multi Family Residential (Member to be deleted from this role)
Financing Receivable, Recorded Investment [Line Items]
Total Loans		0
Risk Rating System | Substandard | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,329	1,417
Risk Rating System | Substandard | Construction and Land Development
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 8,425	8,525
Risk Rating System | Substandard | Financial institutions
Financing Receivable, Recorded Investment [Line Items]
Total Loans		0
Risk Rating System | Substandard | Commercial loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans		0
Risk Rating System | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total Loans		0
Risk Rating System | Doubtful | One-to-four family residential
Financing Receivable, Recorded Investment [Line Items]
Total Loans		0
Risk Rating System | Doubtful | Multi Family Residential (Member to be deleted from this role)
Financing Receivable, Recorded Investment [Line Items]
Total Loans		0
Risk Rating System | Doubtful | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total Loans		0
Risk Rating System | Doubtful | Construction and Land Development
Financing Receivable, Recorded Investment [Line Items]
Total Loans		0
Risk Rating System | Doubtful | Financial institutions
Financing Receivable, Recorded Investment [Line Items]
Total Loans		0
Risk Rating System | Doubtful | Commercial loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans		$ 0

LOANS RECEIVABLE - Loans in whi

LOANS RECEIVABLE - Loans in which formal risk rating system is not utilized, but loans are segregated between performing and non-performing based primarily on delinquency status (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Sep. 30, 2020
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 697,987	$ 685,259
One-to-four family residential
Financing Receivable, Recorded Investment [Line Items]
Total Loans	245,292	233,872
Leases
Financing Receivable, Recorded Investment [Line Items]
Total Loans	127	176
Consumer Loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans	525	604
Non Risk Rating System
Financing Receivable, Recorded Investment [Line Items]
Total Loans	652	780
Non Risk Rating System | Leases
Financing Receivable, Recorded Investment [Line Items]
Total Loans	127	176
Non Risk Rating System | Consumer Loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans	525	604
Non Risk Rating System | Performing
Financing Receivable, Recorded Investment [Line Items]
Total Loans	652	780
Non Risk Rating System | Performing | Leases
Financing Receivable, Recorded Investment [Line Items]
Total Loans	127	176
Non Risk Rating System | Performing | Consumer Loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans	525	$ 604
Non Risk Rating System | Non-performing assets
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0
Non Risk Rating System | Non-performing assets | Leases
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0
Non Risk Rating System | Non-performing assets | Consumer Loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 0

LOANS RECEIVABLE - Loan categor

LOANS RECEIVABLE - Loan categories of loan portfolio summarized by aging categories of performing loans and nonaccrual loans (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Sep. 30, 2020
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 681,692	$ 670,340
Past Due	16,295	14,919
Total Loans	697,987	685,259
Non- Accrual	12,840	13,037
90 Days+ Past Due and Accruing	0	0
30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	3,670	2,824
Over 90 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	12,625	12,095
One-to-four family residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	241,013	231,196
Past Due	4,279	2,676
Total Loans	245,292	233,872
Non- Accrual	3,086	3,095
90 Days+ Past Due and Accruing	0	0
One-to-four family residential | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,408	523
One-to-four family residential | Over 90 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2,871	2,153
Multi Family Residential (Member to be deleted from this role)
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	32,019	31,100
Past Due	0	0
Total Loans	32,019	31,100
Non- Accrual	0	0
90 Days+ Past Due and Accruing	0	0
Multi Family Residential (Member to be deleted from this role) | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Multi Family Residential (Member to be deleted from this role) | Over 90 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	136,787	136,225
Past Due	3,591	3,718
Total Loans	140,378	139,943
Non- Accrual	1,329	1,417
90 Days+ Past Due and Accruing	0	0
Commercial Real Estate | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	2,262	2,301
Commercial Real Estate | Over 90 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,329	1,417
Construction and Land Development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	249,298	252,123
Past Due	8,425	8,525
Total Loans	257,723	260,648
Non- Accrual	8,425	8,525
90 Days+ Past Due and Accruing	0	0
Construction and Land Development | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Construction and Land Development | Over 90 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	8,425	8,525
Commercial loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	21,923	12,916
Past Due	0	0
Total Loans	21,923	12,916
Non- Accrual	0	0
90 Days+ Past Due and Accruing	0	0
Commercial loans | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Commercial loans | Over 90 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Financial institutions
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current		6,000
Past Due		0
Total Loans		6,000
Non- Accrual		0
90 Days+ Past Due and Accruing		0
Financial institutions | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		0
Financial institutions | Over 90 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due		0
Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	127	176
Past Due	0	0
Total Loans	127	176
Non- Accrual	0	0
Leases | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Leases | Over 90 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Consumer Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	525	604
Past Due	0	0
Total Loans	525	604
Non- Accrual	0	0
90 Days+ Past Due and Accruing	0	0
Consumer Loans | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Consumer Loans | Over 90 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 0	$ 0

LOANS RECEIVABLE - Activity in

LOANS RECEIVABLE - Activity in allowance (Details) - USD ($)	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Sep. 30, 2020
Allowance for Loan and Lease Losses [Roll Forward]
ALLL balance	$ 8,303,000	$ 5,393,000
Recoveries	15,000	10,000
Provision	0	125,000
ALLL balance	8,318,000	5,528,000
Individually evaluated for impairment	0		$ 0
Collectively evaluated for impairment	8,318,000		8,303,000
One-to-four family residential
Allowance for Loan and Lease Losses [Roll Forward]
ALLL balance	1,877,000	1,002,000
Recoveries	1,000
Provision	133,000	(3,000)
ALLL balance	2,011,000	999,000
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	2,011,000		1,877,000
Multi Family Residential (Member to be deleted from this role)
Allowance for Loan and Lease Losses [Roll Forward]
ALLL balance	460,000	315,000
Charge-offs	0	0
Recoveries	0	0
Provision	(3,000)	(60,000)
ALLL balance	457,000	255,000
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	457,000		460,000
Commercial Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
ALLL balance	1,989,000	1,257,000
Charge-offs	0	0
Recoveries	0	0
Provision	(54,000)	24,000
ALLL balance	1,935,000	1,281,000
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	1,935,000		1,989,000
Construction and Land Development
Allowance for Loan and Lease Losses [Roll Forward]
ALLL balance	2,888,000	2,034,000
Charge-offs	0	0
Recoveries	0	0
Provision	(60,000)	171,000
ALLL balance	2,828,000	2,205,000
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	2,828,000		2,888,000
Commercial loans
Allowance for Loan and Lease Losses [Roll Forward]
ALLL balance	194,000	206,000
Charge-offs	0	0
Recoveries	14,000	0
Provision	111,000	(5,000)
ALLL balance	319,000	201,000
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	319,000		194,000
Financial institutions
Allowance for Loan and Lease Losses [Roll Forward]
ALLL balance	89,000	63,000
Charge-offs	0	0
Recoveries	0	0
Provision	(89,000)	0
ALLL balance	0	63,000
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	0		89,000
Leases
Allowance for Loan and Lease Losses [Roll Forward]
ALLL balance	3,000	5,000
Charge-offs	0	0
Recoveries	0	10,000
Provision	0	(11,000)
ALLL balance	3,000	4,000
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	3,000		3,000
Consumer Loans
Allowance for Loan and Lease Losses [Roll Forward]
ALLL balance	6,000	13,000
Charge-offs	0	0
Recoveries	0	0
Provision	0	(1,000)
ALLL balance	6,000	12,000
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	6,000		6,000
Unallocated
Allowance for Loan and Lease Losses [Roll Forward]
ALLL balance	797,000	498,000
Charge-offs	0	0
Recoveries	0	0
Provision	(38,000)	10,000
ALLL balance	759,000	$ 508,000
Collectively evaluated for impairment	$ 759,000		$ 797,000

LOANS RECEIVABLE - Additional I

LOANS RECEIVABLE - Additional Information 2 (Details)	3 Months Ended
	Dec. 31, 2020USD ($)loan	Dec. 31, 2019USD ($)loan	Sep. 30, 2020USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans default | loan	4
Loans classified as troubled debt restructurings ("TDRs"), Recorded investment	$ 4,900,000
Write-down amount of TDR loans		$ 0
Number of loans classified as troubled debt restructuring | loan	0	0
Loans receivable, net	$ 605,883,000		$ 588,300,000
Allowance for Loan and Lease Loss, Recovery of Bad Debts	15,000	$ 10,000
Provision for loan losses	0	$ 125,000
Carrying amount	$ 697,987,000		$ 685,259,000
Commercial and residential properties
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans classified as troubled debt restructuring | loan	0	0
Non-performing assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Write-down amount of TDR loans	$ 0
Allowance for Loan and Lease Loss, Recovery of Bad Debts	$ 15,000
Non-performing assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans default | loan	3
Loans classified as troubled debt restructurings ("TDRs"), Recorded investment	$ 4,500,000
Amount of TDR loans, default	10,500,000
Non-performing assets | Single family residential investment properties
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as troubled debt restructurings ("TDRs"), Recorded investment	$ 403,000

DEPOSITS (Details)

DEPOSITS (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Sep. 30, 2020
Amount
Non interest-bearing checking accounts	$ 28,820	$ 30,002
Interest-bearing checking accounts	96,396	135,797
Money market deposit accounts	116,256	111,105
Passbook, club and statement savings	227,035	224,435
Certificates maturing in six months or less	141,956	125,165
Certificates maturing in more than six months	137,996	144,445
Total deposits	$ 748,459	$ 770,949
Percent
Non interest-bearing checking accounts	3.90%	3.90%
Interest-bearing checking accounts	12.90%	17.60%
Money market deposit accounts	15.50%	14.40%
Passbook, club and statement savings	30.30%	29.10%
Certificates maturing in six months or less	19.00%	16.20%
Certificates maturing in more than six months	18.40%	18.80%
Total	100.00%	100.00%

DEPOSITS - Additional Informati

DEPOSITS - Additional Information (Details) - USD ($) $ in Millions	Dec. 31, 2020	Sep. 30, 2020
DEPOSITS [Abstract]
Certificates of $250,000 and over	$ 75.9	$ 76.6

ADVANCES FROM FEDERAL HOME LO_5

ADVANCES FROM FEDERAL HOME LOAN BANK - SHORT TERM (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Sep. 30, 2020
ADVANCES FROM FEDERAL HOME LOAN BANK - SHORT TERM
Balance at period end	$ 25,000	$ 25,000
Weight-average rate at period end	0.39%	0.39%

ADVANCES FROM FEDERAL HOME LO_6

ADVANCES FROM FEDERAL HOME LOAN BANK - SHORT TERM - Additional Information (Details)	Dec. 31, 2020USD ($)loan	Sep. 30, 2020USD ($)
Short-term Debt [Line Items]
Advances from Federal Home Loan Bank - Short Term	$ 25,000,000	$ 25,000,000
Unsecured borrowing facility, amount drawn	$ 0
Coupon	2.57%
Atlantic Community Bankers Bank [Member]
Short-term Debt [Line Items]
Unsecured borrowing facilities maximum capacity	$ 12,500,000
PNC [Member]
Short-term Debt [Line Items]
Unsecured borrowing facilities maximum capacity	$ 10,000,000
Interest rate swap contract one
Short-term Debt [Line Items]
Number of 90 day FHLB advances | loan	1
Advances from Federal Home Loan Bank - Short Term	$ 25,000,000

ADVANCES FROM FEDERAL HOME LO_7

ADVANCES FROM FEDERAL HOME LOAN BANK - LONG TERM (Details) - USD ($) $ in Thousands	15 Months Ended
	Dec. 31, 2020	Sep. 30, 2020
Federal Home Loan Bank, Advances [Line Items]
Stated interest rate range	2.57%
Amount	$ 254,900	$ 260,253
Fixed Rate - Amortizing
Federal Home Loan Bank, Advances [Line Items]
Amount	$ 12,625	15,967
Weighted average interest rate	2.85%
Long-term FHLB advances
Federal Home Loan Bank, Advances [Line Items]
Amount	$ 242,275	244,286
Weighted average interest rate	2.55%
Long-term | Fixed Rate Amortizing Maturity from 1 Oct 20 to 30 Sep 21
Federal Home Loan Bank, Advances [Line Items]
Date of maturity from	Oct. 1, 2020
Date of maturity to	Sep. 30, 2021
Amount	$ 3,076	5,179
Long-term | Fixed Rate Amortizing Maturity from 1 Oct 20 to 30 Sep 21 | Minimum
Federal Home Loan Bank, Advances [Line Items]
Stated interest rate range	2.64%
Long-term | Fixed Rate Amortizing Maturity from 1 Oct 20 to 30 Sep 21 | Maximum
Federal Home Loan Bank, Advances [Line Items]
Stated interest rate range	2.83%
Long-term | Fixed Rate Amortizing Maturity from 1 Oct 20 to 30 Sep 21 | Weighted average
Federal Home Loan Bank, Advances [Line Items]
Weighted average interest rate	2.79%
Long-term | Fixed Rate Amortizing Maturity from 1 Oct 21 to 30 Sep 22
Federal Home Loan Bank, Advances [Line Items]
Date of maturity from	Oct. 1, 2021
Date of maturity to	Sep. 30, 2022
Amount	$ 4,707	5,523
Long-term | Fixed Rate Amortizing Maturity from 1 Oct 21 to 30 Sep 22 | Minimum
Federal Home Loan Bank, Advances [Line Items]
Stated interest rate range	1.99%
Long-term | Fixed Rate Amortizing Maturity from 1 Oct 21 to 30 Sep 22 | Maximum
Federal Home Loan Bank, Advances [Line Items]
Stated interest rate range	3.05%
Long-term | Fixed Rate Amortizing Maturity from 1 Oct 21 to 30 Sep 22 | Weighted average
Federal Home Loan Bank, Advances [Line Items]
Weighted average interest rate	2.86%
Long-term | Fixed Rate Amortizing Maturity from 1 Oct 22 to 30 Sep 23
Federal Home Loan Bank, Advances [Line Items]
Date of maturity from	Oct. 1, 2022
Date of maturity to	Sep. 30, 2023
Amount	$ 4,842	5,265
Long-term | Fixed Rate Amortizing Maturity from 1 Oct 22 to 30 Sep 23 | Minimum
Federal Home Loan Bank, Advances [Line Items]
Stated interest rate range	1.94%
Long-term | Fixed Rate Amortizing Maturity from 1 Oct 22 to 30 Sep 23 | Maximum
Federal Home Loan Bank, Advances [Line Items]
Stated interest rate range	3.11%
Long-term | Fixed Rate Amortizing Maturity from 1 Oct 22 to 30 Sep 23 | Weighted average
Federal Home Loan Bank, Advances [Line Items]
Weighted average interest rate	2.89%
Long-term | Fixed Rate Advances Maturity from 1 Oct 20 to 30 Sep 21
Federal Home Loan Bank, Advances [Line Items]
Date of maturity from	Oct. 1, 2020
Date of maturity to	Sep. 30, 2021
Amount	$ 15,996	17,996
Long-term | Fixed Rate Advances Maturity from 1 Oct 20 to 30 Sep 21 | Minimum
Federal Home Loan Bank, Advances [Line Items]
Stated interest rate range	1.42%
Long-term | Fixed Rate Advances Maturity from 1 Oct 20 to 30 Sep 21 | Maximum
Federal Home Loan Bank, Advances [Line Items]
Stated interest rate range	2.35%
Long-term | Fixed Rate Advances Maturity from 1 Oct 20 to 30 Sep 21 | Weighted average
Federal Home Loan Bank, Advances [Line Items]
Weighted average interest rate	2.30%
Long-term | Fixed Rate Advances Maturity from 1 Oct 21 to 30 Sep 22
Federal Home Loan Bank, Advances [Line Items]
Date of maturity from	Oct. 1, 2021
Date of maturity to	Sep. 30, 2022
Amount	$ 63,282	63,293
Long-term | Fixed Rate Advances Maturity from 1 Oct 21 to 30 Sep 22 | Minimum
Federal Home Loan Bank, Advances [Line Items]
Stated interest rate range	1.94%
Long-term | Fixed Rate Advances Maturity from 1 Oct 21 to 30 Sep 22 | Maximum
Federal Home Loan Bank, Advances [Line Items]
Stated interest rate range	3.23%
Long-term | Fixed Rate Advances Maturity from 1 Oct 21 to 30 Sep 22 | Weighted average
Federal Home Loan Bank, Advances [Line Items]
Weighted average interest rate	2.31%
Long-term | Fixed Rate Advances Maturity from 1 Oct 22 to 30 Sep 23
Federal Home Loan Bank, Advances [Line Items]
Date of maturity from	Oct. 1, 2022
Date of maturity to	Sep. 30, 2023
Amount	$ 94,999	94,999
Long-term | Fixed Rate Advances Maturity from 1 Oct 22 to 30 Sep 23 | Minimum
Federal Home Loan Bank, Advances [Line Items]
Stated interest rate range	2.00%
Long-term | Fixed Rate Advances Maturity from 1 Oct 22 to 30 Sep 23 | Maximum
Federal Home Loan Bank, Advances [Line Items]
Stated interest rate range	3.22%
Long-term | Fixed Rate Advances Maturity from 1 Oct 22 to 30 Sep 23 | Weighted average
Federal Home Loan Bank, Advances [Line Items]
Weighted average interest rate	2.52%
Long-term | Fixed Rate Advances Maturity from 1 Oct 23 to 30 Sep 24
Federal Home Loan Bank, Advances [Line Items]
Date of maturity from	Oct. 1, 2023
Date of maturity to	Sep. 30, 2024
Amount	$ 67,998	$ 67,998
Long-term | Fixed Rate Advances Maturity from 1 Oct 23 to 30 Sep 24 | Minimum
Federal Home Loan Bank, Advances [Line Items]
Stated interest rate range	2.38%
Long-term | Fixed Rate Advances Maturity from 1 Oct 23 to 30 Sep 24 | Maximum
Federal Home Loan Bank, Advances [Line Items]
Stated interest rate range	3.20%
Long-term | Fixed Rate Advances Maturity from 1 Oct 23 to 30 Sep 24 | Weighted average
Federal Home Loan Bank, Advances [Line Items]
Weighted average interest rate	2.88%

DERIVATIVES (Details)

DERIVATIVES (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020
Derivative [Line Items]
Unrealized Gain (Loss)	$ (19,232)	$ (20,960)
Interest rate swap contract maturing on 1 May 2028
Derivative [Line Items]
Hedge Item	State and political subdivisions	State and political subdivisions
Notional Amount	$ 21,570	$ 21,570
Receive Rate	3 Mth Libor	3 Mth Libor
Unrealized Gain (Loss)	$ (3,501)	$ (3,834)
Interest rate swap contract maturing on 1 Aug 2026
Derivative [Line Items]
Hedge Item	Commercial loans	Commercial loans
Notional Amount	$ 23,656	$ 23,656
Receive Rate	1 Mth Libor +225 to 276 bp	1 Mth Libor +225 to 276 bp
Unrealized Gain (Loss)	$ 0	$ 0
Interest rate swap contract maturing on 12 Jun 2026
Derivative [Line Items]
Hedge Item	30 day wholesale funding	30 day wholesale funding
Notional Amount	$ 90,000	$ 90,000
Receive Rate	1 Mth Libor	1 Mth Libor
Unrealized Gain (Loss)	$ (5,563)	$ (6,157)
Interest rate swap contract maturing on 27 Mar 24
Derivative [Line Items]
Hedge Item	90 day wholesale funding	90 day wholesale funding
Notional Amount	$ 135,000	$ 135,000
Receive Rate	3 Mth Libor	3 Mth Libor
Unrealized Gain (Loss)	$ (10,168)	$ (10,969)
Minimum | Interest rate swap contract maturing on 1 May 2028
Derivative [Line Items]
Pay rate	3.06%	3.06%
Maturity date	Feb. 1, 2027	Feb. 1, 2027
Minimum | Interest rate swap contract maturing on 1 Aug 2026
Derivative [Line Items]
Pay rate	4.10%	4.10%
Maturity date	Jun. 13, 2025	Jun. 13, 2025
Minimum | Interest rate swap contract maturing on 12 Jun 2026
Derivative [Line Items]
Pay rate	1.36%	1.36%
Maturity date	Feb. 15, 2024	Feb. 15, 2024
Minimum | Interest rate swap contract maturing on 27 Mar 24
Derivative [Line Items]
Pay rate	2.51%	2.51%
Maturity date	Jan. 11, 2024	Jan. 11, 2024
Maximum | Interest rate swap contract maturing on 1 May 2028
Derivative [Line Items]
Pay rate	3.07%	3.07%
Maturity date	May 1, 2028	May 1, 2028
Maximum | Interest rate swap contract maturing on 1 Aug 2026
Derivative [Line Items]
Pay rate	5.74%	5.74%
Maturity date	Aug. 1, 2026	Aug. 1, 2026
Maximum | Interest rate swap contract maturing on 12 Jun 2026
Derivative [Line Items]
Pay rate	2.70%	2.70%
Maturity date	Jun. 12, 2026	Jun. 12, 2026
Maximum | Interest rate swap contract maturing on 27 Mar 24
Derivative [Line Items]
Pay rate	2.78%	2.78%
Maturity date	Mar. 27, 2024	Mar. 27, 2024

DERIVATIVES - Additional Inform

DERIVATIVES - Additional Information (Details) - USD ($)	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
INTEREST RATE SWAP AGREEMENTS
Income (expense) from components excluded from assessment of cash flow hedge effectiveness, net	$ 2,000	$ (4,000)
Deposits as collateral for hedges	$ 26,300,000

INCOME TAXES - Items that gave

INCOME TAXES - Items that gave rise to significant portions of deferred income taxes (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Sep. 30, 2020
Deferred tax assets:
Allowance for loan losses	$ 2,058	$ 2,071
Nonaccrual interest	590	561
Accrued vacation	16	16
Capital loss carryforward	4	4
Split dollar life insurance	9	9
Post-retirement benefits	71	72
Realized loss on equity securities		3
Unrealized losses on interest rate swaps	3,301	3,596
Deferred compensation	784	781
Goodwill	55	58
Lease liability	285	0
Other	89	48
Employee benefit plans	201	187
Total deferred tax assets	7,463	7,406
Valuation allowance	4	4
Total deferred tax assets, net of valuation allowance	7,459	7,402
Deferred tax liabilities:
Property	195	137
Right of Use	261	0
Realized gain on equity securities	9	0
Unrealized gains on available for sale securities	3,259	2,813
Purchase accounting adjustments	341	321
Deferred loan fees	343	229
Total deferred tax liabilities	4,408	3,500
Net deferred tax assets	$ 3,051	$ 3,902

INCOME TAXES - Additional Infor

INCOME TAXES - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2020	Sep. 30, 2020
INCOME TAXES
Period of capital gains recognized	5 years
Valuation allowance	$ 4	$ 4

STOCK COMPENSATION PLANS - Summ

STOCK COMPENSATION PLANS - Summary of non-vested stock award activity (Details)	3 Months Ended
	Dec. 31, 2020$ / sharesshares
Number of Shares
Non-vested stock awards at beginning of period | shares	23,056
Granted | shares	0
Forfeited | shares	0
Vested | shares	0
Non-vested stock awards at the end of the period | shares	23,056
Weighted Average Grant Date Fair Value
Nonvested stock awards at beginning of period | $ / shares	$ 17.78
Granted | $ / shares	0
Forfeited | $ / shares	0
Vested | $ / shares	0
Non-vested stock awards at the end of the period | $ / shares	$ 17.78

STOCK COMPENSATION PLANS - Su_2

STOCK COMPENSATION PLANS - Summary of status of stock options under Stock Option Plan (Details) - 2008 Option Plan and 2014 SIP - Stock Options	Dec. 31, 2020$ / sharesshares
Number of Shares
Options outstanding at beginning of period | shares	571,258
Outstanding at the end of the period | shares	571,258
Exercisable at December 31 | shares	397,465
Weighted Average Exercise Price
Options outstanding at beginning of period | $ / shares	$ 14.58
Outstanding at the end of the period | $ / shares	14.58
Exercisable at December 31 | $ / shares	$ 13.45

STOCK COMPENSATION PLANS - 2008

STOCK COMPENSATION PLANS - 2008 Recognition and Retention Plan (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended		3 Months Ended
	Mar. 31, 2018	Aug. 31, 2016	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted			0
2008 Recognition and Retention Plan ("2008 RRP")
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares purchased by RRP trust			213,528
Value of shares purchased in open market by RRP trust			$ 2.5
Average price per share of common stock purchased in the open market			$ 11.49
Percentage of vesting per year			20.00%
Vesting period of awards granted			5 years
Number of shares granted	8,209	7,473

STOCK COMPENSATION PLANS - Opti

STOCK COMPENSATION PLANS - Option Plan (Details) - USD ($)	1 Months Ended							3 Months Ended
	Sep. 30, 2020	Jul. 31, 2019	Mar. 31, 2018	May 30, 2017	Mar. 31, 2017	Aug. 31, 2016	Feb. 28, 2015	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted								0
2008 Stock Option Plan (the "2008 Option Plan")
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted			18,235	283
2008 Stock Option Plan (the "2008 Option Plan") | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of vesting and exercisable per year								20.00%
Vesting period of options								5 years
Exercisable period of options after grant date								10 years
Number of common stock available for issuance								533,808
Number of shares purchased for award						18,866
2014 Stock Incentive Plan (the "2014 SIP")
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted				25,000	17,128	3,027
2014 Stock Incentive Plan (the "2014 SIP") | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares for issuance pursuant to options								714,145
Number of shares granted	12,500				22,828	8,634
2014 Stock Incentive Plan (the "2014 SIP") | Restricted stock awards or units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common stock available for issuance							285,655
Number of shares granted							233,500
2008 RRP and 2014 SIP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares purchased for award							605,000
Number of shares granted			18,291
2008 RRP and 2014 SIP | Restricted stock awards or units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of options								5 years
Recognized compensation expense								$ 43,000	$ 136,000
Additional compensation expense for shares awarded remained unrecognized								380,000
2008 Option Plan and 2014 SIP | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted		39,702	159,265
Recognized compensation expense								43,000	$ 229,000
Additional compensation expense for shares awarded remained unrecognized								$ 280,000

STOCK COMPENSATION PLANS - Op_2

STOCK COMPENSATION PLANS - Option Granted (Details) - USD ($)	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average remaining contractual term for options outstanding	5 years 10 months 24 days
Exercise price and fair value	$ 18.46
2008 Option Plan and 2014 SIP | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized compensation expense	$ 43,000	$ 229,000
Additional compensation expense for shares awarded remained unrecognized	$ 280,000
Weighted average period for recognition of nonvested awards	2 years 7 months 6 days
2008 Option Plan and 2014 SIP | Stock Options | Granted in fiscal 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated fair value of options granted per share	$ 2.98
2008 Option Plan and 2014 SIP | Stock Options | Granted in fiscal 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated fair value of options granted per share	2.92
2008 Option Plan and 2014 SIP | Stock Options | Granted in fiscal 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated fair value of options granted per share	3.34
2008 Option Plan and 2014 SIP | Stock Options | Granted in fiscal 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated fair value of options granted per share	4.67
2008 Option Plan and 2014 SIP | Stock Options | Granted in fiscal 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated fair value of options granted per share	4.58
2008 Option Plan and 2014 SIP | Stock Options | Granted in fiscal 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated fair value of options granted per share	2.13
2008 Option Plan and 2014 SIP | Stock Options | Granted in fiscal 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated fair value of options granted per share	$ 3.18
Fair value, valuation method	Black-Scholes pricing model
Expected term	7 years
Volatility rate	14.37%
Expected interest rate	2.22%
Expected yield	0.69%
2008 Option Plan and 2014 SIP | Stock Options | Granted in fiscal 2017 | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price and fair value	$ 17.43
2008 Option Plan and 2014 SIP | Stock Options | Granted in fiscal 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated fair value of options granted per share	$ 3.63
2008 Option Plan and 2014 SIP | Stock Options | Granted In March 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value, valuation method	Black-Scholes pricing model
Expected term	7 years
Volatility rate	15.90%
Expected interest rate	2.82%
Expected yield	1.08%
2008 Option Plan and 2014 SIP | Stock Options | Granted in fiscal 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated fair value of options granted per share	$ 3.38
Fair value, valuation method	Black-Scholes pricing model
Exercise price and fair value	$ 18.16
Expected term	7 years
Volatility rate	17.76%
Expected interest rate	1.87%
Expected yield	1.10%
2008 Option Plan and 2014 SIP | Stock Options | Granted In Fiscal 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated fair value of options granted per share	$ 2.31
Fair value, valuation method	Black-Scholes pricing model
Exercise price and fair value	$ 10
Expected term	7 years
Volatility rate	33.22%
Expected interest rate	0.41%
Expected yield	2.80%

COMMITMENTS AND CONTINGENT LI_2

COMMITMENTS AND CONTINGENT LIABILITIES (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020
COMMITMENTS AND CONTINGENT LIABILITIES
Outstanding commitments	$ 1,000
Aggregate undisbursed portion of loans-in-process	82,726	$ 86,862
Loan Origination Commitments
COMMITMENTS AND CONTINGENT LIABILITIES
Outstanding commitments	69,100	29,900
Aggregate undisbursed portion of loans-in-process	$ 82,700	$ 86,900
Loan Origination Commitments | Minimum
COMMITMENTS AND CONTINGENT LIABILITIES
Market interest rate on fixed and variable rate loans	3.25%	3.25%
Loan Origination Commitments | Maximum
COMMITMENTS AND CONTINGENT LIABILITIES
Market interest rate on fixed and variable rate loans	5.00%	4.75%
Unused lines of Credit
COMMITMENTS AND CONTINGENT LIABILITIES
Outstanding commitments	$ 34,500	$ 40,100
Letters of Credit
COMMITMENTS AND CONTINGENT LIABILITIES
Outstanding commitments	$ 1,100	$ 1,100

FAIR VALUE MEASUREMENT - Assets

FAIR VALUE MEASUREMENT - Assets measured at fair value on recurring basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Dec. 31, 2020	Sep. 30, 2020
Assets:
Assets, Total	$ 400,966	$ 420,415
Liabilities:
Liabilities, Total	19,232	20,960
Level 1
Assets:
Assets, Total	62	51
Level 2
Assets:
Assets, Total	400,904	420,364
Liabilities:
Liabilities, Total	19,232	20,960
U.S. Government and agency obligations
Assets:
Assets, Total	22,357	22,394
U.S. Government and agency obligations | Level 2
Assets:
Assets, Total	22,357	22,394
State and political subdivisions
Assets:
Assets, Total	81,290	79,621
State and political subdivisions | Level 2
Assets:
Assets, Total	81,290	79,621
Mortgage-Backed Securities
Assets:
Assets, Total	212,666	236,566
Mortgage-Backed Securities | Level 2
Assets:
Assets, Total	212,666	236,566
Corporate bonds
Assets:
Assets, Total	84,591	81,783
Corporate bonds | Level 2
Assets:
Assets, Total	84,591	81,783
Equity security - FHLMC preferred stock
Assets:
Assets, Total	62	51
Equity security - FHLMC preferred stock | Level 1
Assets:
Assets, Total	62	51
Interest rate swap contract matured on 1 April 2027
Liabilities:
Liabilities, Total	19,232	20,960
Interest rate swap contract matured on 1 April 2027 | Level 2
Liabilities:
Liabilities, Total	$ 19,232	$ 20,960

FAIR VALUE MEASUREMENT - Asse_2

FAIR VALUE MEASUREMENT - Assets measured at fair value on a non-recurring basis and the adjustments to the carrying value (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Sep. 30, 2020
Assets:
Loans receivable, net	$ 605,883	$ 588,300
Liabilities:
Advances from FHLB long-term	254,900	260,253
Carrying Amount
Assets:
Investment and mortgage-backed securities held to maturity	22,590	22,860
Loans receivable, net	605,883	588,300
Liabilities:
Certificates of deposit	279,952	269,610
Advances from FHLB long-term	254,900	260,253
Fair Value
Assets:
Investment and mortgage-backed securities held to maturity	24,012	24,330
Loans receivable, net	607,763	593,768
Liabilities:
Certificates of deposit	288,137	278,224
Advances from FHLB long-term	267,966	274,172
Level 1
Assets:
Investment and mortgage-backed securities held to maturity	0	0
Loans receivable, net	0
Liabilities:
Certificates of deposit	288,137	278,224
Advances from FHLB long-term	267,966	274,172
Level 2
Assets:
Investment and mortgage-backed securities held to maturity	24,012	24,330
Loans receivable, net	0
Liabilities:
Certificates of deposit	0	0
Advances from FHLB long-term	0	0
Level 3
Assets:
Investment and mortgage-backed securities held to maturity	0	0
Loans receivable, net	607,763	593,768
Liabilities:
Certificates of deposit	0	0
Advances from FHLB long-term	$ 0	$ 0

GOODWILL AND OTHER INTANGIBLE_3

GOODWILL AND OTHER INTANGIBLE ASSETS - Related to acquisition of Polonia Bancorp (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Goodwill
Balance, Goodwill	$ 6,102
Balance, Goodwill	6,102
Core deposit intangible
Balance	340
Balance	314
GOODWILL AND OTHER INTANGIBLE ASSETS, Total
Amortization	(26)	$ (30)
Polonia Bancorp
Goodwill
Balance, Goodwill	6,102
Additions/Adjustments	0
Balance, Goodwill	6,102
GOODWILL AND OTHER INTANGIBLE ASSETS, Total
Balance, Total	6,442
Additions/Adjustments	0
Amortization	(26)
Balance, Total	6,416
Polonia Bancorp | Core deposit intangible
Core deposit intangible
Balance	340
Additions/Adjustments	0
Amortization	(26)
Balance	$ 314
Amortization Period	10 years

GOODWILL AND OTHER INTANGIBLE_4

GOODWILL AND OTHER INTANGIBLE ASSETS - Future fiscal periods amortization expense (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Sep. 30, 2020
GOODWILL AND OTHER INTANGIBLE ASSETS
2021	$ 67
2022	78
2023	64
2024	49
2025	34
Thereafter	22
Total	$ 314	$ 340

LEASES (Details)

LEASES (Details)	Dec. 31, 2020
Lessee, Lease, Description [Line Items]
Weighted-average remaining lease term - operating leases in years	7 years 1 month 6 days
Weighted-average discount rate - operating leases	2.00%
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term (in years)	5 years
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term (in years)	9 years

LEASES - Aggregate lease maturi

LEASES - Aggregate lease maturities and obligations (Details) $ in Thousands	Dec. 31, 2020USD ($)
Aggregate lease maturities and obligations
2021	$ 157
2022	213
2023	216
2024	220
2025	231
2025 and thereafter	423
Total lease payments	1,460
Less: interest	102
Present value of lease liabilities	$ 1,358

LEASES - Narrative (Details)

LEASES - Narrative (Details)	3 Months Ended
	Dec. 31, 2020USD ($)
Operating lease ROU assets	$ 1,300,000
Operating lease liabilities	1,358,000
Operating lease cost	$ 53,000
Minimum
Remaining lease term (in years)	5 years
Maximum
Remaining lease term (in years)	9 years