Mercer Bancorp (MSBB) 10-Q/A 20 May 24 2024 Q1 Quarterly report (amended) Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Dec. 31, 2023	Feb. 09, 2024
Document and Entity Information [Abstract]
Document Type	10-Q/A
Document Quarterly Report	true
Document Period End Date	Dec. 31, 2023
Document Transition Report	false
Entity File Number	000-56575
Entity Registrant Name	Mercer Bancorp, Inc.
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	92-3452469
Entity Address, Address Line One	1100 Irmscher Blvd
Entity Address, City or Town	Celina
Entity Address State Or Province	OH
Entity Address, Postal Zip Code	45822
City Area Code	419
Local Phone Number	586-5158
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		1,022,970
Entity Central Index Key	0001967306
Current Fiscal Year End Date	--09-30
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Amendment Flag	true
Amendment Description	Mercer Bancorp, Inc., a Maryland corporation (the “Company”), is filing this Amendment to our Quarterly Report on Form 10-Q for the period ended December 31, 2023 (the “Amended Report”), which was originally filed on  February 14, 2024 (the “Original Report” or “Quarterly Report on Form 10-Q”), to reflect a restatement of our consolidated financial statements.

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($)	Dec. 31, 2023	Sep. 30, 2023
Assets
Cash and due from banks	$ 2,238,904	$ 1,707,488
Interest-bearing deposits in other financial institutions	5,396,313	4,583,848
Cash and cash equivalents	7,635,217	6,291,336
Interest-bearing time deposits	100,000	100,000
Available-for-sale securities, net of allowance for credit losses of $0 for December 31, 2023 and September 30, 2023	11,648,818
Available-for-sale securities, net of allowance for credit losses of $0 for December 31, 2023 and September 30, 2023		11,449,715
Held-to-maturity securities, net of allowance for credit losses of $0 for December 31, 2023 and September 30, 2023	133,551
Held-to-maturity securities, net of allowance for credit losses of $0 for December 31, 2023 and September 30, 2023		147,291
Loans held for sale	5,236,643	3,094,405
Loans receivable		130,901,654
Allowance for credit losses		(934,331)
Net loans		129,967,323
Loans receivable	134,513,249
Allowance for credit losses	(966,593)
Net loans	133,546,656
Premises and equipment	2,553,121	2,601,575
Foreclosed real estate	54,000	54,000
Federal Home Loan Bank stock	1,474,700	1,368,900
Bank owned life insurance	1,794,889	1,783,880
Accrued interest receivable	528,479	456,867
Federal Home Loan Bank lender risk account	488,277	490,411
Deferred federal income taxes	303,690	407,304
Other assets	871,485	833,606
Total assets	166,369,526	159,046,613
Deposits
Demand	50,192,283	50,597,494
Savings and money market	39,239,103	39,900,297
Time	41,344,526	32,317,957
Total deposits	130,775,912	122,815,748
Advances from the Federal Home Loan Bank - short term	10,000,000	11,000,000
Advances from the Federal Home Loan Bank - long term	1,000,000	1,000,000
Directors plan liability	437,362	444,770
Accrued interest payable and other liabilities	905,810	1,108,404
Total liabilities	143,119,084	136,368,922
Shareholders' Equity
Common stock - authorized 9,000,000 shares of $0.01 par value, issued and outstanding 1,022,970 shares	10,229	10,229
Additional paid-in capital	8,658,653	8,642,312
Shares acquired by ESOP	(754,329)	(818,380)
Shares issued to irrevocable trust	96,360	96,360
Shares held in irrevocable trust	(96,360)	(96,360)
Retained earnings	15,852,110	15,703,856
Accumulated other comprehensive loss	(516,221)	(860,326)
Total shareholders' equity	23,250,442	22,677,691
Total liabilities and shareholders' equity	$ 166,369,526	$ 159,046,613

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($)	Dec. 31, 2023	Sep. 30, 2023
Consolidated Balance Sheets
Available-for-sale securities, allowance for credit losses	$ 0
Held-to-maturity securities, allowance for credit losses	$ 0
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock par value	$ 0.01	$ 0.01
Preferred stock, shares issued	0	0
Common stock, shares authorized	9,000,000	9,000,000
Common Stock, par value	$ 0.01	$ 0.01
Common stock, shares, issued	1,022,970	1,022,970
Common stock, shares, outstanding	1,022,970	1,022,970

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($)	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Interest Income
Loans	$ 1,716,117	$ 1,222,045
Investment securities	66,668	66,310
Interest-bearing deposits and other	94,720	105,406
Total interest income	1,877,505	1,393,761
Interest Expense
Deposits	329,666	48,609
Federal Home Loan Bank advances	166,288	7,209
Total interest expense	495,954	55,818
Net Interest Income	1,381,551	1,337,943
Net Interest Income After Provision for Loan Losses	1,381,551	1,337,943
Noninterest Income
Service fees on deposits	83,252	75,915
Late charges and fees on loans	46,855	24,941
Loan servicing fees	11,986	10,066
Loss on sale of investments		(8,049)
Bank owned life insurance	15,555	14,381
Life insurance death benefits		4,515
Other income	3,954	5,552
Total noninterest income	161,602	127,321
Noninterest Expense
Salaries and employee benefits	615,555	535,960
Directors fees	22,425	20,175
Occupancy and equipment	123,975	112,993
Data processing fees	128,270	130,564
Franchise taxes	19,276	19,999
FDIC insurance premiums	17,059	10,264
Professional services	110,250	51,353
Deposit account services expense	73,514	60,997
Advertising	23,104	21,939
Loan expenses	69,183	19,880
Other	123,001	76,161
Total noninterest expense	1,325,612	1,060,285
Income before income taxes	217,541	404,979
Provision for income taxes	44,007	76,400
Net Income	$ 173,534	$ 328,579
Earnings per share, basic	$ 0.18
Earnings per share, diluted	$ 0.18

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($)	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Consolidated Statements of Comprehensive Income
Net Income (Loss)	$ 173,534	$ 328,579
Other comprehensive income:
Net unrealized gains (losses) on available-for-sale securities	435,576	170,128
Reclassification adjustment for realized loss on sales of securities		8,049
Tax (expense) benefit	(91,471)	(37,417)
Other comprehensive income (loss)	344,105	140,760
Comprehensive income (loss)	$ 517,639	$ 469,339

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity - USD ($)	Common Stock	Additional Paid-in Capital	Shares Acquired by ESOP	Shares Issued To Irrevocable Trust	Shares Held To Irrevocable Trust	Retained Earnings Previously Reported [Member]	Retained Earnings Restatement adjustment	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment [Member]	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Previously Reported [Member]	Restatement adjustment	Cumulative Effect, Period of Adoption, Adjustment [Member]	Total
Beginning balance at Sep. 30, 2022									$ 14,959,892	$ (903,562)				$ 14,056,330
Net Income (Loss)									328,579					328,579
Other comprehensive income/(loss)										140,760				140,760
Ending balance at Dec. 31, 2022									15,288,471	(762,802)				14,525,669
Beginning balance at Sep. 30, 2022									14,959,892	(903,562)				14,056,330
Net Income (Loss)												$ 0
Ending balance (Accounting Standards Update 2016-13 [Member]) at Sep. 30, 2023								$ (25,280)					$ (25,280)
Ending balance at Sep. 30, 2023	$ 10,229	$ 8,642,312	$ (818,380)	$ 96,360	$ (96,360)				15,703,856	(860,326)		0		22,677,691
Net Income (Loss)						$ 189,855	$ (16,321)		173,534		$ 189,855	$ (16,321)		173,534
ESOP shares allocated to participants		16,341	64,051											80,392
Other comprehensive income/(loss)										344,105				344,105
Ending balance at Dec. 31, 2023	$ 10,229	$ 8,658,653	$ (754,329)	$ 96,360	$ (96,360)				$ 15,852,110	$ (516,221)				$ 23,250,442

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Operating Activities
Net income	$ 173,534	$ 328,579
Items not requiring (providing) cash:
Depreciation and amortization	92,109	74,463
Amortization of premiums and discounts	7,731	15,962
Amortization of deferred loan fees	(15,836)	(17,635)
Deferred income taxes	18,863	4,116
ESOP compensation expense	80,392
Loans originated for sale	(2,142,238)	(281,500)
Loss on sale of investment securities		8,049
Life insurance death benefits		(4,515)
Increase in cash surrender value of bank-owned life insurance	(11,009)	(14,381)
Changes in:
Accrued interest receivable	(71,612)	7,927
Other assets	(38,717)	102,613
Other liabilities	(210,002)	(98,385)
Net cash (used in) provided by operating activities	(2,116,785)	125,293
Investing Activities
Purchases of available-for-sale securities	(890,248)	(1,273,478)
Proceeds from sales of available-for-sale securites	0	519,438
Proceeds from calls, maturities and paydowns of available-for-sale securities	1,119,365	160,050
Principal repayments on securities held-to-maturity	13,365	20,318
Net change in loans	(3,595,497)	(159,935)
Purchase of premises and equipment	(40,683)	(65,835)
Proceeds from redemption of FHLB stock	(105,800)
Proceeds from sale of foreclosed real estate		18,000
Proceeds from death benefit of life insurance policies		541,987
Net cash used in investing activities	(3,499,498)	(239,455)
Financing Activities
Net (decrease) increase in deposit accounts	7,960,164	(7,059,795)
Proceeds from FHLB advances - short term	15,000,000
Repayment of FHLB advances - short term	(16,000,000)
Net cash provided by (used in) financing activities	6,960,164	(7,059,795)
Increase (Decrease) in Cash and Cash Equivalents	1,343,881	(7,173,957)
Cash and Cash Equivalents, Beginning of Period	6,291,336	14,376,718
Cash and Cash Equivalents, End of Period	7,635,217	7,202,761
Supplemental Disclosure of Cash Flow Information
Interest on deposits and borrowings	435,208	55,894
Non Cash Activies:
Effect of adoption of ASC 326	$ 32,000	$ 0

Nature of Operations and Summar

Nature of Operations and Summary of Significant Accounting Policies	3 Months Ended
	Dec. 31, 2023
Nature of Operations and Summary of Significant Accounting Policies
Nature of Operations and Summary of Significant Accounting Policies	Note 1: Nature of Operations and Summary of Significant Accounting Policies Inclusion of Unaudited Information The financial information included herein as of December 31, 2023, and for the interim three months periods ended December 31, 2023 and 2022 is unaudited. However, in management’s opinion, the information reflects all normal, recurring adjustments that are necessary for a fair presentation. The results shown for the three months ended December 31, 2023 are not necessarily indicative of the results to be obtained for a full year. Nature of Operations Mercer Bancorp, Inc. (“Mercer Bancorp” or the “Company”) is a Maryland corporation incorporated on March 7, 2023, to serve as the bank holding company for Mercer Savings Bank (“Mercer Savings” or the “Bank”) in connection with the Bank’s conversion from the mutual form of organization to the stock form of organization (the “Conversion”). The Conversion was completed on July 26, 2023. In connection with the Conversion, Mercer Bancorp acquired Mercer Savings Bank (“Bank”) is an Ohio chartered stock bank engaged primarily in the business of providing a variety of deposit and lending services to individual customers in western Ohio. Its primary deposit products are checking, savings, and term certificate accounts, and its primary lending products are residential and commercial mortgage, agricultural, commercial, home equity lines of credit and installment loans, and indirect automobile loans. Its operations are conducted through its four office locations in Celina, Ft. Recovery and Greenville, Ohio. The Bank faces competition from other financial institutions and is subject to the regulation of certain federal and state agencies and undergoes periodic examinations by those regulatory authorities. Principles of Consolidation The consolidated financial statements as of and for the three months ended December 31, 2023, include the accounts of Mercer Bancorp, Inc. and its wholly-owned subsidiary, the Bank. All intercompany transactions and balances have been eliminated in consolidation. The financial statements as of and for the three months ended December 31, 2022, represent the Bank only, as the conversion to stock form, including the formation of Mercer Bancorp, Inc., was completed on July 26, 2023. References herein to the “Company” for periods prior to the completion of the stock conversion should be deemed to refer to the “Bank”. Revision of Prior Period Financial Statements. ​ The Company has revised the consolidated financial statements as of and for the year ended September 30, 2023. The revisions were considered necessary for two primary reasons, as follows: ​ (1) as a result of the recent discovery of several unpaid and unaccrued invoices, for legal services provided during the year ended September 30, 2023. The invoices represented services performed in connection with the Company’s initial public offering completed effective July 27, 2023, as well as for services performed subsequent to completion of the stock offering. ​ (2) the Company has revised the consolidated financial statements to record the effects of irrevocable (Rabbi) trusts that have been established for the benefit of two members of the board of directors. ​ The effect of the revisions to the September 30, 2023 consolidated financial statements related to the legal invoices were as follows: (a) a reduction to additional paid-in capital totaling $81,340, (b) an increase in legal expense of $32,398, (c) a decrease in income tax expense of $6,804, (d) an increase in accrued liabilities of $106,934 and (d) a decrease in retained earnings of $25,594. ​ The effect of the revisions to the September 30, 2023 consolidated financial statements related to the Rabbi trusts included the addition of two net effect on the total stockholder’s equity as previously reported. There were liabilities ​ The Company has concluded that the effect of the revisions to the consolidated financial statements as of and for the year ended September 30, 2023 were not material. ​ Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change relate to the determination of the allowance for credit losses, valuation of real estate acquired in connection with foreclosures or in satisfaction of loans, valuation of mortgage servicing rights and deferred tax assets and fair values of financial instruments. Loans Held for Sale Mortgage and indirect auto loans originated and intended for sale in the secondary market are carried at the lower of cost or fair value in the aggregate. Net unrealized losses, if any, are recognized through a valuation allowance by charges to noninterest income. Gains and losses on loan sales are recorded in noninterest income, and direct loan origination costs and fees are deferred at origination of the loan and are recognized in noninterest income upon sale of the loan. Loans Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at their outstanding principal balances, adjusted for unearned income, charge-offs, the allowance for credit losses and any unamortized deferred fees or costs on originated loans and unamortized premiums or discounts on purchased loans. For loans amortized at cost, interest income is accrued based on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, as well as premiums and discounts, are deferred and amortized as a level yield adjustment over the respective term of the loan. For all loan portfolio segments except residential and consumer loans, the Bank promptly charges-off loans, or portions thereof, when available information confirms that specific loans are uncollectible based on information that includes, but is not limited to, (1) the deteriorating financial condition of the borrower, (2) declining collateral values, and/or (3) legal action, including bankruptcy, that impairs the borrower’s ability to adequately meet its obligations. For impaired loans that are considered to be solely collateral dependent, a partial charge-off is recorded when a loss has been confirmed by an updated appraisal or other appropriate valuation of the collateral. The Bank charges-off loans, or portions thereof, when the Bank reasonably determines the amount of the loss. The Bank adheres to delinquency thresholds established by applicable regulatory guidance to determine the charge-off timeframe for these loans. Loans at these delinquency thresholds for which the Bank can clearly document that the loan is both well-secured and in the process of collection, such that collection will occur regardless of delinquency status, need not be charged off. For all classes, all interest accrued but not collected for loans that are placed on nonaccrual or charged off is reversed against interest income. The interest on these loans is accounted for on the cash basis or cost recovery method, until qualifying for return to accrual. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured. Nonaccrual loans are returned to accrual status when, in the opinion of management, the financial position of the borrower indicates there is no longer any reasonable doubt as to the timely collection of interest or principal. The Bank requires a period of satisfactory performance of not less than six months before returning a nonaccrual loan to accrual status. When cash payments are received on individually evaluated loans, the Bank records the payment as interest income unless collection of the remaining recorded principal amount is doubtful, at which time payments are used to reduce the principal balance of the loan. Loans to borrowers experiencing financial difficulties that have been modified recognize interest income on an accrual basis at the renegotiated rate if the loan is in compliance with the modified terms, no principal reduction has been granted and the loan has demonstrated the ability to perform in accordance with the renegotiated terms for a period of at least six months. Allowance for Credit Losses The Company adopted ASU No. 2016-13 using the modified retrospective method for financial assets measured at amortized cost and off-balance-sheet credit exposures effective October 1, 2023 . Results for the period beginning after October 1, 2023 are presented under ASU No. 2016-13, while prior period amounts are reported in accordance with the previously applicable accounting standards . ​ A vailable-for-sale securities ​ For available for sale securities in an unrealized loss position, the Company first assesses whether it intends to sell, or it is more likely than not that it will be required to sell the security before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the security’s amortized cost basis is written down to fair value through income. ​ For securities available - for - sale that do not meet the above criteria, the Company evaluates whether the decline in fair value has resulted from credit losses or other factors. In making this assessment, the Company considers the extent to which fair value is less than amortized cost and adverse conditions related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of the cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for credit losses is recorded for the credit loss, limited by the amount that the fair value is less than the amortized cost. Any impairment that has not been recorded through an allowance for credit losses is recognized in other comprehensive income, net of tax. The Company elected the practical expedient of zero loss estimates for securities issued by U.S. government entities and agencies. These securities are either explicitly or implicitly guaranteed by the U.S. government, are highly rated by major agencies and have a long history of no credit losses. Management concluded that no allowance for credit losses was required on available-for-sale securities at October 1, 2023 and December 31, 2023. ​ Accrued interest receivable on available-for-sale debt securities totaled $53,536 at December 31, 2023 and is included within accrued interest receivable on the balance sheet. This amount is excluded from the estimate of expected credit losses. Held-to-maturity debt securities are typically classified as nonaccrual when the contractual payment of principal or interest has become 90 days past due or management has serious doubts about the further collectability of principal or interest. When held-to-maturity debt securities are placed on nonaccrual status, unpaid interest credited to income is reversed. ​ Held-to-Maturity Securities ​ The Company measures expected credit losses on held-to-maturity debt securities, which are comprised of U.S. government sponsored enterprise mortgage-back securities and residential mortgage-backed securities. The Company’s residential mortgage-backed security holdings are issued by U.S. government entities and agencies and are either explicitly or implicitly guaranteed by the U.S. government, are highly rated by major rating agencies and have a long history of no credit losses. Management concluded that no allowance for credit losses was required on held-to-maturity securities at October 1, 2023 and December 31, 2023. ​ Accrued interest receivable on held-to-maturity debt securities totaled $538 at December 31, 2023 and is included within accrued interest receivable on the balance sheet. This amount is excluded from the estimate of expected credit losses. Held-to-maturity debt securities are typically classified as nonaccrual when the contractual payment of principal or interest has become 90 days past due or management has serious doubts about the further collectability of principal or interest. When held-to-maturity debt securities are placed on nonaccrual status, unpaid interest credited to income is reversed. ​ Loans The allowance for credit losses (ACL) is a valuation allowance that is deducted from the loans’ amortized cost basis to present the net amount expected to be collected on the loans. Loan losses are charged against the allowance when management believes the collectibility of a loan balance is doubtful. Subsequent recoveries, if any, are credited to the allowance. etermination of the adequacy of the ACL is based on the assessment of the expected credit losses on loans over the expected life of the loan. The ACL is increased by provision expense and decreased by charge-offs, net of recoveries of amounts previously charged off and expected to be charged off. The Company made the policy election to exclude accrued interest receivable on loans from the estimate of credit losses. ​ Management estimates the ACL balance using relevant available information from both internal and external sources, relating to past events, current conditions and reasonable and supportable forecasts. Historical credit loss experience of a defined peer group, by affiliate, paired with economic forecasts provide the basis for the quantitatively modeled estimates of expected credit losses. The Company adjusts its quantitative model, as necessary, to reflect conditions not already considered by the quantitative model. These adjustments are commonly known as the qualitative factors. ​ The ACL is measured on a collective (pool) basis when similar risk characteristics exist. The Company uses the average historical loss method to measure the quantitative portion of the ACL over the forecast and reversion periods. ​ Loans that do not share risk characteristics are evaluated on an individual basis. Loans evaluated individually are not also included in the collective evaluation. When management determines that foreclosure is probable, expected credit losses are based on the fair value of the collateral at the reporting date, adjusted for selling costs as appropriate. ​ Expected credit losses are estimated over the contractual term of the loans, adjusted for expected prepayments when appropriate. The contractual term excludes expected extensions, renewals and modifications unless either of the following applies: management has a reasonable expectation at the reporting date that a troubled debt restructuring will be executed with an individual borrower or the extension or renewal options are included in the original or modified contract at the reporting date and are not unconditionally cancellable by the Company. ​ Unfunded Commitments ​ The Company estimates expected credit losses over the contractual period in which the Company is exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by the Company. The ACL on unfunded commitments is adjusted through the provision for credit loss expense. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded over its estimated life consistent with the related ACL methodology. Management concluded that no allowance for credit losses was required on unfunded commitments at October 1, 2023 and December 31, 2023. ​ Prior to October 1, 2023, the Company calculated the allowance for loan losses under the probable incurred methodology. ​ For periods prior to October 1, 2023 the allowance for loan losses is a valuation allowance for probable incurred credit losses. Loan losses are charged against the allowance when management believes the collectibility of a loan balance is doubtful. Subsequent recoveries, if any, are credited to the allowance. For periods prior to October 1, 2023 the allowance for loan losses is evaluated on a quarterly basis by management and is based upon management’s periodic review of the collectability of the loans in light of historical experience, the nature and volume of the loan portfolio, adverse situations that may affect the borrower’s ability to repay, estimated value of any underlying collateral and prevailing economic conditions. This evaluation is inherently subjective as it requires estimates that are susceptible to significant revision as more information becomes available. The allowance consists of allocated and general components. The allocated component relates to loans that are classified as impaired. For those loans that are classified as impaired, an allowance is established when the discounted cash flows (or collateral value or observable market price) of the impaired loan is lower than the carrying value of that loan. The general component covers nonimpaired loans and is based on historical charge-off experience by segment. The historical loss experience is determined by portfolio segment and is based on the actual loss history experienced by the Bank over the prior three years. Management believes the three-year historical loss experience methodology is appropriate in the current economic environment. Other adjustments (qualitative/environmental considerations) for each segment may be added to the allowance for each loan segment after an assessment of internal or external influences on credit quality that are not fully reflected in the historical loss or risk rating data. A loan is considered impaired when, based on current information and events, it is probable that the Bank will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Factors considered by management in determining impairment include payment history and the probability of collecting scheduled principal and interest payments when due, based on the loan’s current payment status and the borrower’s financial condition, including available sources of cash flows. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record and the amount of the shortfall in relation to the principal and interest owed. Impairment is generally measured on a loan-by-loan basis by either the present value of expected future cash flows discounted at the loan’s effective interest rate, the loan’s obtainable market price or the fair value of the collateral if the loan is collateral dependent. For impaired loans where the Bank utilizes the discounted cash flows to determine the level of impairment, the Bank includes the entire change in the present value of cash flows as a provision for loan losses. The fair values of collateral dependent impaired loans are based on independent appraisals of the collateral. In general, the Bank acquires an updated appraisal upon identification of impairment and annually thereafter for commercial, commercial real estate and multi-family loans. If the most recent appraisal is over a year old, and a new appraisal is not performed, due to lack of comparable values or other reasons, the existing appraisal is utilized and discounted based on the age of the appraisal, condition of the subject property and overall economic conditions. After determining the collateral value as described, the fair value is calculated based on the determined collateral value less selling expenses. The potential for outdated appraisal values is considered in our determination of the allowance for loan losses through our analysis of various trends and conditions including the local economy, trends in charge-offs and delinquencies and the related qualitative adjustments assigned by the Bank. Segments of loans with similar risk characteristics are collectively evaluated for impairment based on the segment’s historical loss experience adjusted for changes in trends, conditions and other relevant factors that affect repayment of the loans. In the course of working with borrowers, the Bank may choose to restructure the contractual terms of certain loans. In this scenario, the Bank attempts to work out an alternative payment schedule with the borrower in order to optimize collectibility of the loan. Any loans that are modified are reviewed by the Bank to identify if a troubled debt restructuring (“TDR”) has occurred, which is when, for economic or legal reasons related to a borrower’s financial difficulties, the Bank grants a concession to the borrower that it would not otherwise consider. Terms may be modified to fit the ability of the borrower to repay in line with the borrower’s current financial status, and the restructuring of the loan may include the transfer of assets from the borrower to satisfy the debt, a modification of loan terms or a combination of the two. If such efforts by the Bank do not result in a satisfactory arrangement, the loan is referred to legal counsel, at which time foreclosure proceedings are initiated. At any time prior to a sale of the property at foreclosure, the Bank may terminate foreclosure proceedings if the borrower is able to work out a satisfactory payment plan. It is the Bank’s policy that any restructured loans on nonaccrual status prior to being restructured remain on nonaccrual status until six months of satisfactory borrower performance, at which time management would consider its return to accrual status. If a loan was accruing at the time of restructuring, the Bank reviews the loan to determine if it is appropriate to continue the accrual of interest on the restructured loan. With regard to determination of the amount of the allowance for loan losses, troubled debt restructured loans are considered to be impaired. As a result, the determination of the amount of impaired loans for each portfolio segment within troubled debt restructurings is the same as detailed previously. Employee Stock Ownership Plan (ESOP) The cost of shares issued to the Employee Stock Ownership Plan (“ESOP”), but not yet allocated to participants, is shown as a reduction of shareholders’ equity. Compensation expense is based on the average fair value of shares as they are committed to be released to participant accounts. Earnings Per Share Basic earnings per share is calculated by dividing net income by the weighted-average number of common shares outstanding during the period. Unallocated common shares held by the ESOP are shown as a reduction in shareholders’ equity and are excluded from weighted-average common shares outstanding for both basic and diluted earnings per share calculations until they are committed to be released. The Company had no dilutive or potentially dilutive securities during the three months ended December 31, 2023. Earnings per share is not applicable to the three months ended December 31, 2022, as the Company completed the stock offering and conversion to stock form on July 26, 2023. Revenue Recognition The Bank accounts for certain revenues in accordance with Accounting Standards Update (“ASU”) 2014-09 Revenue from Contracts with Customers Deposit Services. For deposit-related services, revenue is recognized when performance obligations are satisfied, which is, generally, at a point in time. ​

Restatement of Previously Issue

Restatement of Previously Issued Financial Statements	3 Months Ended
	Dec. 31, 2023
Restatement of Previously Issued Financial Statements [Abstract]
Restatement of Previously Issued Financial Statements	Note 2: Restatement of Previously Issued Financial Statements. The Company has restated herein the unaudited consolidated financial statements as of and for the three months ended December 31, 2023. The restatement was considered necessary due to the recent discovery of several unpaid and unaccrued invoices, for legal services provided during the three-month period ended December 31, 2023. Accordingly, we have restated herein our consolidated financial statements at and for the three months ended December 31, 2023, in accordance with Accounting Standards Codification (“ASC”) Topic 250, Accounting Changes and Error Corrections. The effect of the restatement to the December 31, 2023 consolidated financial statements related to the legal invoices were as follows: (a) an increase to legal expense of $20,659, (b) a decrease to income tax expense of $4,338, (c) an increase to accrued liabilities of $16,321 and (d) a decrease to retained earnings of $16,321. The effect on reported earnings per share was a $0.02 reduction which brought earnings per share to $0.18 for the 3 months ended December 31, 2023. ​

Change in Accounting Principle

Change in Accounting Principle	3 Months Ended
	Dec. 31, 2023
Change in Accounting Principle
Change in Accounting Principle	Note 3: Change in Accounting Principle The FASB issued ASU No. 2016-13, Financial Instruments—Credit Losses (Topic 326) The CECL model utilizes a lifetime “expected credit loss” measurement objective for the recognition of credit losses for loans, held-to-maturity securities and other receivables at the time the financial asset is originated or acquired. The expected credit losses are adjusted each period for changes in expected lifetime credit losses. For available-for-sale securities where fair value is less than cost, credit-related impairment, if any, will be recognized in an allowance for credit losses and adjusted each period for changes in expected credit risk. This model replaces the existing impairment models, which generally require that a loss be incurred before it is recognized. The CECL model represents a significant change from existing practice and may result in material changes to the Company’s accounting for financial instruments. The Company is evaluating the effect ASU 2016-13 will have on its financial statements and related disclosures. The impact of the ASU will depend upon the state of the economy and the nature of our portfolios at the date of adoption. The new standard was effective for fiscal years beginning after December 15, 2022, or October 1, 2023 as to the Company, including interim periods within those fiscal years. The Company adopted the new standard effective October 1, 2023, which resulted in a $32,000 increase to the allowance for credit losses and a charge, net of tax, of $25,280 to retained earnings.

Debt Securities

Debt Securities	3 Months Ended
	Dec. 31, 2023
Debt Securities
Debt Securities	Note 4: Debt Securities The amortized cost and fair values, together with gross unrealized gains and losses of securities are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross Gross ​ ​ ​ ​ Amortized ​ Unrealized ​ Unrealized ​ ​ ​ ​ Cost ​ Gains ​ Losses ​ Fair Value Available-for-sale Securities: ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasury securities ​ $ 999,740 ​ $ — ​ $ (19,740) ​ $ 980,000 U.S. Government agencies ​ 3,410,444 ​ — ​ (117,860) ​ 3,292,584 Mortgage-backed Government Sponsored Enterprises (GSEs) ​ 4,008,229 ​ — ​ (304,911) ​ 3,703,318 State and political subdivisions ​ 3,883,850 ​ 41,437 ​ (252,371) ​ 3,672,916 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 12,302,263 ​ $ 41,437 ​ $ (694,882) ​ $ 11,648,818 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross ​ Gross ​ ​ ​ ​ ​ Amortized ​ Unrealized ​ Unrealized ​ ​ ​ Cost Gains Losses Fair Value Available-for-sale Securities: ​ ​ ​ ​ September 30, 2023 ​ ​ ​ ​ U.S. Treasury securities ​ $ 999,565 ​ $ — ​ $ (32,845) ​ $ 966,720 U.S. Government agencies ​ 4,009,577 ​ — ​ (184,807) ​ 3,824,770 Mortgage-backed Government Sponsored Enterprises (GSEs) ​ 3,647,020 ​ — ​ (414,789) ​ 3,232,231 State and political subdivisions ​ 3,882,574 ​ — ​ (456,580) ​ 3,425,994 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 12,538,736 ​ $ — ​ $ (1,089,021) ​ $ 11,449,715 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross ​ Gross ​ ​ ​ ​ ​ Amortized ​ Unrealized ​ Unrealized ​ ​ ​ Cost Gains Losses Fair Value Held-to-maturity Securities: ​ ​ ​ ​ December 31, 2023 ​ ​ ​ ​ Mortgage-backed Government Sponsored Enterprises (GSEs) ​ $ 133,551 ​ $ — ​ $ (3,183) ​ $ 130,368 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2023 ​ ​ ​ ​ Mortgage-backed Government Sponsored Enterprises (GSEs) ​ $ 147,291 ​ $ — ​ $ (4,149) ​ $ 143,142 ​ The Company had no allowance for credit losses on available-for-sale and held-to maturity securities at December 31, 2023. ​ The amortized cost and fair value of available-for-sale securities at December 31, 2023 by contractual maturity, are shown below. Expected maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortized ​ Fair ​ Cost Value December 31, 2023 ​ ​ Within one year ​ $ 999,740 ​ $ 980,000 One to five years ​ 3,460,803 ​ 3,323,495 Five to ten years ​ 404,999 ​ 404,453 After ten years ​ 3,428,492 ​ 3,237,552 ​ ​ 8,294,034 ​ 7,945,500 Mortgage-backed GSEs ​ 4,008,229 ​ 3,703,318 Totals ​ $ 12,302,263 ​ $ 11,648,818 ​ Maturity information for held-to-maturity securities is not presented since expected maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties The carrying value of securities pledged as collateral, to secure public deposits and for other purposes, was approximately $476,000 and $468,000 at December 31, 2023 and September 30, 2023, respectively. Proceeds from sales of available for sale securities totaled $519,000 during the three months ended December 31, 2022, resulting in gross realized losses of $8,049. There were no sales of securities during the three-month period ended December 31, 2023. Certain investments in debt securities are reported in the financial statements at an amount less than their historical cost. Total fair value of these investments, comprised of 19 securities at December 31, 2023 and 23 securities at September 30, 2023, was approximately $9,569,000 and $11,450,000 or 83 percent and 100 percent, respectively, of the fair value of the Bank’s total investment portfolio. These declines primarily resulted from changes in market interest rates. Based on evaluation of available evidence, including recent changes in market interest rates and information obtained from regulatory filings, management believes the declines in fair value for these securities are temporary. The following tables show the Bank’s investments’ gross unrealized losses and fair value of the Bank’s investments with unrealized losses, for which an allowance for credit loss has not been recorded, aggregated by investment class and length of time that individual securities have been in a continuous unrealized loss position at December 31, 2023 and September 30, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2023 ​ ​ Less than 12 Months ​ 12 Months or More ​ Total ​ ​ Fair ​ Unrealized ​ Fair ​ Unrealized ​ Fair ​ Unrealized Description of Securities Value Losses Value Losses Value Losses Available for sale ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasury securities ​ $ — ​ $ — ​ $ 980,000 ​ $ (19,740) ​ $ 980,000 ​ $ (19,740) U.S. Government agencies ​ 404,453 ​ (545) ​ 2,888,130 ​ (117,315) ​ 3,292,583 ​ (117,860) Mortgage-backed Government Sponsored Enterprises (GSEs) ​ — ​ — ​ 3,217,524 ​ (304,911) ​ 3,217,524 ​ (304,911) State and political subdivisions ​ — ​ — ​ 2,078,985 ​ (252,371) ​ 2,078,985 ​ (252,371) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total temporarily impaired securities ​ $ 404,453 ​ $ (545) ​ $ 9,164,639 ​ $ (694,337) ​ $ 9,569,092 ​ $ (694,882) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2023 ​ ​ Less than 12 Months ​ 12 Months or More ​ Total ​ ​ Fair ​ Unrealized ​ Fair ​ Unrealized ​ Fair ​ Unrealized Description of Securities Value Losses Value Losses Value Losses Available for sale ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasury securities ​ $ — ​ $ — ​ $ 966,720 ​ $ (32,845) ​ $ 966,720 ​ $ (32,845) U.S. Government agencies ​ — ​ — ​ 3,824,770 ​ (184,807) ​ 3,824,770 ​ (184,807) Mortgage-backed Government Sponsored Enterprises (GSEs) ​ — ​ — ​ 3,232,231 ​ (414,789) ​ 3,232,231 ​ (414,789) State and political subdivisions ​ 1,481,544 ​ (71,136) ​ 1,944,450 ​ (385,444) ​ 3,425,994 ​ (456,580) ​ ​ 1,481,544 ​ (71,136) ​ 9,968,171 ​ (1,017,885) ​ 11,449,715 ​ (1,089,021) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Held to maturity ​ ​ ​ ​ ​ ​ Mortgage-backed Government Sponsored Enterprises (GSEs) ​ — ​ — ​ 143,142 ​ (4,149) ​ 143,142 ​ (4,149) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total temporarily impaired securities ​ $ 1,481,544 ​ $ (71,136) ​ $ 10,111,313 ​ $ (1,022,034) ​ $ 11,592,857 ​ $ (1,093,170) ​ U.S. Government Treasuries and Agencies and State and Political Subdivisions Unrealized losses on these securities have not been recognized because the issuers’ bonds are of high credit quality, values have only been impacted by changes in interest rates since the securities were purchased, and the Bank has the intent and ability to hold the securities for the foreseeable future. The fair value is expected to recover as the bonds approach the maturity date. Because the decline in market value was attributable to changes in interest rates, and not credit quality, and because the Bank typically does not intend to sell the investments and it is not more likely than not the Bank will be required to sell the investments before recovery of their amortized cost basis, which may be maturity, the Bank has not established an allowance for credit losses for these securities at December 31, 2023. Mortgage-backed GSEs The unrealized losses on the Bank’s investment in residential mortgage-backed government sponsored enterprises were caused primarily by changes in interest rates. The Bank expects to recover the amortized cost basis over the term of the securities. Because the decline in market value is attributable to changes in interest rates, and not credit quality, and because the Bank typically does not intend to sell the investments and it is not more likely than not the Bank will be required to sell the investments before recovery of their amortized cost basis, which may be maturity, the Bank has not established an allowance for credit losses for these securities at December 31, 2023.

Loans and Loans and Allowance f

Loans and Loans and Allowance for Credit Losses	3 Months Ended
	Dec. 31, 2023
Loans and Allowance for Credit Losses
Loans and Allowance for Credit Losses	Note 5: Loans and Allowance for Credit Losses Categories of loans were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ September 30, ​ ​ 2023 2023 Real estate loans: ​ ​ ​ ​ Residential ​ $ 73,290,421 ​ $ 74,561,278 ​ Multi-family ​ 1,297,142 ​ 1,309,586 ​ Agricultural ​ 40,949,888 ​ 36,378,192 ​ Commercial ​ 2,221,381 ​ 2,311,882 ​ Construction and land ​ 4,269,565 ​ 5,082,863 ​ Home equity line of credit (HELOC) ​ 4,871,656 ​ 4,708,023 ​ Commercial and industrial ​ 1,790,942 ​ 1,801,569 ​ Consumer ​ 7,710,352 ​ 7,652,164 ​ ​ ​ ​ ​ ​ ​ ​ ​ Total loans ​ 136,401,347 ​ 133,805,557 ​ ​ ​ ​ ​ ​ ​ ​ ​ Less: ​ ​ ​ Undisbursed loans in process ​ 1,563,513 ​ 2,578,282 ​ Net deferred loan fees ​ 324,585 ​ 325,621 ​ Allowance for credit losses ​ 966,593 ​ 934,331 ​ ​ ​ ​ ​ ​ ​ ​ ​ Net loans ​ $ 133,546,656 ​ $ 129,967,323 ​ ​ Mortgage loans serviced for others are not included in the accompanying balance sheets. The unpaid principal balances of these loans at December 31, 2023 and September 30, 2023, were approximately $19,219,000 and $19,667,000 respectively. ​ The Company adopted ASU 2016-13 effective October 1,2023, which required implementation of the current expected credit loss (CECL) model in estimating the allowance for credit losses (ACL) valuation account. The implementation of the new standard resulted in a increase to the overall balance of the Company’s allowance for credit losses (ACL). The following tables present the activity in the allowance for credit losses based on portfolio segment for ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended December 31, 2023 ​ ​ ​ ​ Effect of ​ Provision ​ ​ ​ ​ ​ ​ ​ ​ Balance ​ adoption of ​ (credit) ​ ​ ​ ​ ​ Balance ​ October 1, 2023 ASC 326 ​ for credit losses Charge-offs Recoveries December 31, 2023 Real estate loans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential ​ $ 738,230 ​ $ 32,000 ​ $ 7,412 ​ $ — ​ $ — ​ $ 777,642 Multi-family ​ 12,840 ​ — ​ ​ (10,198) ​ — ​ — ​ 2,642 Agricultural ​ 73,608 ​ — ​ ​ 9,801 ​ — ​ — ​ 83,409 Commercial ​ 4,678 ​ — ​ ​ (153) ​ — ​ — ​ 4,525 Construction and land ​ 49,835 ​ — ​ ​ (9,550) ​ — ​ — ​ 40,285 Home equity line of credit (HELOC) ​ 14,289 ​ — ​ ​ 595 ​ — ​ — ​ 14,884 Commercial and industrial ​ 3,645 ​ — ​ ​ 3 ​ — ​ — ​ 3,648 Consumer ​ 37,206 ​ — ​ ​ 2,090 ​ — ​ 262 ​ 39,558 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total loans ​ $ 934,331 ​ $ 32,000 ​ $ — ​ $ — ​ $ 262 ​ $ 966,593 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended December 31, 2022 ​ ​ ​ ​ Provision ​ ​ ​ ​ ​ ​ ​ ​ Balance ​ (credit) ​ ​ ​ ​ ​ Balance ​ October 1, 2022 for loan losses Charge-offs Recoveries December 31, 2022 Real estate loans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential ​ $ 623,649 ​ $ 58,838 ​ $ (22,809) ​ $ — ​ $ 659,678 Multi-family ​ 11,008 ​ 1,669 ​ — ​ — ​ 12,677 Agricultural ​ 199,011 ​ (45,091) ​ — ​ — ​ 153,920 Commercial ​ 10,801 ​ (1,731) ​ — ​ — ​ 9,070 Construction and land ​ 35,292 ​ 3,515 ​ — ​ — ​ 38,807 Home equity line of credit (HELOC) ​ 69,234 ​ (22,170) ​ — ​ — ​ 47,064 Commercial and industrial ​ 12,086 ​ (3,079) ​ — ​ — ​ 9,007 Consumer ​ 22,573 ​ 8,049 ​ — ​ — ​ 30,622 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total loans ​ $ 983,654 ​ $ — ​ $ (22,809) ​ $ — ​ $ 960,845 ​ The following tables present the balance in the allowance for credit losses and the recorded investment in loans based on portfolio segment and impairment method as of December 31, 2023 and September 30, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Allowance for credit losses ​ Loans ​ ​ Ending balance, evaluated for expected credit losses ​ Ending balance, evaluated for expected credit losses ​ Individually Collectively Individually Collectively ​ ​ (In thousands) December 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ Real estate loans: ​ ​ ​ ​ Residential ​ $ — ​ $ 777,642 ​ $ 593,206 ​ $ 72,697,215 Multi-family ​ — ​ 2,642 ​ — ​ 1,297,142 Agricultural ​ — ​ 83,409 ​ — ​ 40,949,888 Commercial ​ — ​ 4,525 ​ — ​ 2,221,381 Construction and land ​ — ​ 40,285 ​ — ​ 4,269,565 Home equity line of credit (HELOC) ​ — ​ 14,884 ​ — ​ 4,871,656 Commercial and industrial ​ — ​ 3,648 ​ — ​ 1,790,942 Consumer ​ — ​ 39,558 ​ 20,831 ​ 7,710,352 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total loans ​ $ — ​ $ 966,593 ​ $ 614,037 ​ $ 135,808,141 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Allowance for loan losses ​ Loans ​ ​ Ending balance, evaluated for impairment ​ Ending balance, evaluated for impairment ​ Individually Collectively Individually Collectively September 30, 2023 ​ ​ ​ ​ ​ ​ ​ ​ Real estate loans: ​ ​ ​ ​ Residential ​ $ — ​ $ 738,230 ​ $ — ​ $ 74,561,278 Multi-family ​ — ​ 12,840 ​ — ​ 1,309,586 Agricultural ​ — ​ 73,608 ​ — ​ 36,378,192 Commercial ​ — ​ 4,678 ​ — ​ 2,311,882 Construction and land ​ — ​ 49,835 ​ — ​ 5,082,863 Home equity line of credit (HELOC) ​ — ​ 14,289 ​ — ​ 4,708,023 Commercial and industrial ​ — ​ 3,645 ​ — ​ 1,801,569 Consumer ​ — ​ 37,206 ​ — ​ 7,652,164 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total loans ​ $ — ​ $ 934,331 ​ $ — ​ $ 133,805,557 ​ The Bank has adopted a standard loan grading system for all loans, as follows: Pass. Special Mention. Substandard. Doubtful. Loss. Risk characteristics of each loan portfolio segment are described as follows: Residential Real Estate These loans include first liens and junior liens on 1-4 family residential real estate (both owner and non-owner occupied). The main risks for these loans are changes in the value of the collateral and stability of the local economic environment and its impact on the borrowers’ employment. Management specifically considers unemployment and changes in real estate values in the Bank’s market area. Multi-family Real Estate These loans include loans on residential real estate secured by property with five or more units. The main risks are changes in the value of the collateral, ability of borrowers to collect rents, vacancy and changes in the tenants’ employment status. Management specifically considers unemployment and changes in real estate values in the Bank’s market area. Agriculture Real Estate These loans are primarily loans on farm ground and include loans secured by residential properties located on farm ground, but agricultural activities may not be the primary occupation of the borrowers. The main risks are changes in the value of the collateral and changes in the economy or borrowers’ business operations. Management specifically considers unemployment and changes in real estate values in the Bank’s market area. Commercial Real Estate These loans are generally secured by owner-occupied commercial real estate including warehouses and offices. The main risks are changes in the value of the collateral and ability of borrowers to successfully conduct their business operations. Management specifically considers unemployment and changes in real estate values in the Bank’s market area. Construction and Land Real Estate These loans include construction loans for 1-4 family residential and commercial properties (both owner and non-owner occupied) and first liens on land. The main risks for construction loans include uncertainties in estimating costs of construction and in estimating the market value of the completed project. The main risks for land loans are changes in the value of the collateral and stability of the local economic environment. Management specifically considers unemployment and changes in real estate values in the Bank’s market area. HELOC These loans are generally secured by owner-occupied 1-4 family residences. The main risks for these loans are changes in the value of the collateral and stability of the local economic environment and its impact on the borrowers’ employment. Management specifically considers unemployment and changes in real estate values in the Bank’s market area. Commercial and Industrial The commercial and industrial portfolio includes loans to commercial customers for use in financing working capital needs, equipment purchases and expansions. The loans in this category are repaid primarily from the cash flow of a borrower’s principal business operation. Credit risk in these loans is driven by creditworthiness of the borrower and the economic conditions that impact the cash flow stability from business operations. Consumer Loans These loans include vehicle loans, share loans and unsecured loans. The main risks for these loans are the depreciation of the collateral values (vehicles) and the financial condition of the borrowers. Major employment changes are specifically considered by management. Information regarding the credit quality indicators most closely monitored for other than residential real estate loans by class as of December 31, 2023 and September 30, 2023, follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Term Loans Amortized Costs Basis by Origination Year ​ ​ ​ ​ ​ ​ ​ ​ ​ For The Years Ending September 30, ​ ​ ​ ​ 12/31/2023 2023 2022 2021 2020 2019 Prior Total December 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial real estate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk Rating ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ - ​ $ - ​ $ 1,482,676 ​ $ 500,008 ​ $ - ​ $ - ​ $ 238,697 ​ $ 2,221,381 Special Mention ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Substandard ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Doubtful ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Total ​ $ - ​ $ - ​ $ 1,482,676 ​ $ 500,008 ​ $ - ​ $ - ​ $ 238,697 ​ $ 2,221,381 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial real estate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current period gross charge-offs ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk Rating ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 44,800 ​ $ 3,991,745 ​ $ 71,092 ​ $ 71,266 ​ $ 51,998 ​ $ 12,996 ​ $ 25,667 ​ $ 4,269,565 Special Mention ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Substandard ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Doubtful ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Total ​ $ 44,800 ​ $ 3,991,745 ​ $ 71,092 ​ $ 71,266 ​ $ 51,998 ​ $ 12,996 ​ $ 25,667 ​ $ 4,269,565 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current period gross charge-offs ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial and industrial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk Rating ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 54,439 ​ $ 190,422 ​ $ 273,947 ​ $ 228,281 ​ $ 622,114 ​ $ 62,519 ​ $ 359,221 ​ $ 1,790,942 Special Mention ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Substandard ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Doubtful ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Total ​ $ 54,439 ​ $ 190,422 ​ $ 273,947 ​ $ 228,281 ​ $ 622,114 ​ $ 62,519 ​ $ 359,221 ​ $ 1,790,942 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial and industrial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current period gross charge-offs ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Multi Family ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk Rating ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ - ​ $ - ​ $ 973,664 ​ $ - ​ $ - ​ $ 175,906 ​ $ 147,573 ​ $ 1,297,142 Special Mention ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Substandard ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Doubtful ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Total ​ $ - ​ $ - ​ $ 973,664 ​ $ - ​ $ - ​ $ 175,906 ​ $ 147,573 ​ $ 1,297,142 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Term Loans Amortized Costs Basis by Origination Year ​ ​ ​ ​ ​ ​ ​ ​ ​ For The Years Ending September 30, ​ ​ ​ ​ 12/31/2023 2023 2022 2021 2020 2019 Prior Total ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Multi Family ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current period gross charge-offs ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agricultural ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk Rating ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 4,775,232 ​ $ 12,938,459 ​ $ 9,300,846 ​ $ 6,057,543 ​ $ 4,262,134 ​ $ 562,180 ​ $ 3,053,495 ​ $ 40,949,888 Special Mention ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Substandard ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Doubtful ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Total ​ $ 4,775,232 ​ $ 12,938,459 ​ $ 9,300,846 ​ $ 6,057,543 ​ $ 4,262,134 ​ $ 562,180 ​ $ 3,053,495 ​ $ 40,949,888 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agricultural ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current period gross charge-offs ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk Rating ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 4,874,470 ​ $ 17,120,626 ​ $ 12,102,225 ​ $ 6,857,098 ​ $ 4,936,246 ​ $ 813,601 ​ $ 3,824,652 ​ $ 50,528,918 Special Mention ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Substandard ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Doubtful ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Total ​ $ 4,874,470 ​ $ 17,120,626 ​ $ 12,102,225 ​ $ 6,857,098 ​ $ 4,936,246 ​ $ 813,601 ​ $ 3,824,652 ​ $ 50,528,918 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Special ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass Mention Substandard Doubtful Total September 30, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate loans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential ​ $ 74,083,965 ​ $ — ​ $ 477,313 ​ $ — ​ $ 74,561,278 Multi-family ​ 1,309,586 ​ — ​ — ​ — ​ 1,309,586 Agricultural ​ 36,378,192 ​ — ​ — ​ — ​ 36,378,192 Commercial ​ 2,311,882 ​ — ​ — ​ — ​ 2,311,882 Construction and land ​ 5,082,863 ​ — ​ — ​ — ​ 5,082,863 Home equity line of credit (HELOC) ​ 4,708,023 ​ — ​ — ​ — ​ 4,708,023 Commercial and industrial ​ 1,801,569 ​ — ​ — ​ — ​ 1,801,569 Consumer ​ 7,652,164 ​ — ​ — ​ — ​ 7,652,164 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total loans ​ $ 133,328,244 ​ $ — ​ $ 477,313 ​ $ — ​ $ 133,805,557 ​ The Bank monitors the credit risk profile by payment activity for residential and consumer loan classes. Loans past due 90 days or more and loans on nonaccrual status are considered nonperforming. Nonperforming loans are reviewed monthly. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Term Loans Amortized Costs Basis by Origination Year ​ ​ ​ ​ ​ ​ ​ ​ ​ For The Years Ending September 30, ​ ​ ​ ​ 12/31/2023 2023 2022 2021 2020 2019 Prior Total December 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential real estate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Payment Performance ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Performing ​ $ 1,005,224 ​ $ 4,910,086 ​ $ 16,268,568 ​ $ 20,198,257 ​ $ 7,005,759 ​ $ 2,868,168 ​ $ 20,441,155 ​ $ 72,697,215 Nonperforming ​ ​ - ​ ​ - ​ ​ - ​ ​ 304,134 ​ ​ - ​ ​ - ​ ​ 289,072 ​ ​ 593,206 Total ​ $ 1,005,224 ​ $ 4,910,086 ​ $ 16,268,568 ​ $ 20,502,391 ​ $ 7,005,759 ​ $ 2,868,168 ​ $ 20,730,227 ​ $ 73,290,421 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential real estate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current period gross charge-offs ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Home equity ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Payment Performance ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Performing ​ $ 241,084 ​ $ 975,922 ​ $ 1,436,397 ​ $ 781,686 ​ $ 514,490 ​ $ 298,614 ​ $ 623,463 ​ $ 4,871,656 Nonperforming ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Total ​ $ 241,084 ​ $ 975,922 ​ $ 1,436,397 ​ $ 781,686 ​ $ 514,490 ​ $ 298,614 ​ $ 623,463 ​ $ 4,871,656 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Home equity ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current period gross charge-offs ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Payment Performance ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Performing ​ $ 2,803 ​ $ 7,216,482 ​ $ 249,309 ​ $ 82,971 ​ $ 84,847 ​ $ 35,500 ​ $ 17,610 ​ $ 7,689,521 Nonperforming ​ ​ - ​ ​ 20,831 ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ 20,831 Total ​ $ 2,803 ​ $ 7,237,313 ​ $ 249,309 ​ $ 82,971 ​ $ 84,847 ​ $ 35,500 ​ $ 17,610 ​ $ 7,710,352 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current period gross charge-offs ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Payment Performance ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Performing ​ $ 1,249,111 ​ $ 13,102,489 ​ $ 17,954,273 ​ $ 21,062,914 ​ $ 7,605,096 ​ $ 3,202,282 ​ $ 21,082,227 ​ $ 85,258,392 Nonperforming ​ ​ - ​ ​ 20,831 ​ ​ - ​ ​ 304,134 ​ ​ - ​ ​ - ​ ​ 289,072 ​ ​ 614,037 Total ​ $ 1,249,111 ​ $ 13,123,320 ​ $ 17,954,273 ​ $ 21,367,048 ​ $ 7,605,096 ​ $ 3,202,282 ​ $ 21,371,299 ​ $ 85,872,429 ​ The Bank evaluates the loan risk grading system definitions on an ongoing basis. No significant changes were made during the three months ended December 31, 2023 or the year ended September 30, 2023. The following tables present the Bank’s loan portfolio aging analysis of the recorded investment in loans as of December 31, 2023 and September 30, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2023 ​ ​ ​ ​ ​ ​ Greater Than ​ ​ ​ ​ ​ ​ ​ ​ ​ 30-59 Days ​ 60-89 Days ​ 90 Days ​ Total ​ ​ ​ Total Loans ​ ​ Past Due Past Due Past Due Past Due Current Receivable Real estate loans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential ​ $ 484,091 ​ $ 296,092 ​ $ 593,206 ​ $ 1,373,389 ​ $ 71,917,032 ​ $ 73,290,421 ​ Multi-family ​ — ​ — ​ — ​ — ​ 1,297,142 ​ 1,297,142 ​ Agricultural ​ — ​ — ​ — ​ — ​ 40,949,888 ​ 40,949,888 ​ Commercial ​ — ​ — ​ — ​ — ​ 2,221,381 ​ 2,221,381 ​ Construction and land ​ — ​ — ​ — ​ — ​ 4,269,565 ​ 4,269,565 ​ Home equity line of credit (HELOC) ​ — ​ — ​ — ​ — ​ 4,871,656 ​ 4,871,656 ​ Commercial and industrial ​ — ​ — ​ — ​ — ​ 1,790,942 ​ 1,790,942 ​ Consumer ​ 121,834 ​ 4,919 ​ 20,831 ​ 147,584 ​ 7,562,768 ​ 7,710,352 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 605,925 ​ $ 301,011 ​ $ 614,037 ​ $ 1,520,973 ​ $ 134,880,374 ​ $ 136,401,347 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2023 ​ ​ ​ ​ ​ ​ Greater Than ​ ​ ​ ​ ​ ​ ​ ​ ​ 30-59 Days ​ 60-89 Days ​ 90 Days ​ Total ​ ​ ​ Total Loans ​ ​ Past Due Past Due Past Due Past Due Current Receivable Real estate loans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential ​ $ 482,844 ​ $ 332,929 ​ $ 477,313 ​ $ 1,293,086 ​ $ 73,268,192 ​ $ 74,561,278 ​ Multi-family ​ — ​ — ​ — ​ — ​ 1,309,586 ​ 1,309,586 ​ Agricultural ​ — ​ — ​ — ​ — ​ 36,378,192 ​ 36,378,192 ​ Commercial ​ — ​ — ​ — ​ — ​ 2,311,882 ​ 2,311,882 ​ Construction and land ​ — ​ — ​ — ​ — ​ 5,082,863 ​ 5,082,863 ​ Home equity line of credit (HELOC) ​ — ​ — ​ — ​ — ​ 4,708,023 ​ 4,708,023 ​ Commercial and industrial ​ — ​ — ​ — ​ — ​ 1,801,569 ​ 1,801,569 ​ Consumer ​ 5,653 ​ 20,831 ​ — ​ 26,484 ​ 7,625,680 ​ 7,652,164 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 488,497 ​ $ 353,760 ​ $ 477,313 ​ $ 1,319,570 ​ $ 132,485,987 ​ $ 133,805,557 ​ ​ The Bank had no loans loans Nonaccrual loans with no allowance for credit losses at December 31, 2023 and September 30, 2023, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ September 30, ​ ​ 2023 2023 Residential real estate loans ​ $ 593,206 ​ $ 477,313 ​ Consumer ​ 20,831 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 614,037 ​ $ 477,313 ​ ​ There were no loans modified for borrowers experiencing financial difficulty during the three months ended December 31, 2023 and 2022 and during the year ended September 30, 2023. There were no loans modified for borrowers experiencing financial difficulty in the past 12 months that subsequently defaulted during the three months ended December 31, 2023 and 2022 and during the year ended September 30, 2023.

Regulatory Matters

Regulatory Matters	3 Months Ended
	Dec. 31, 2023
Regulatory Matters
Regulatory Matters	Note 6: Regulatory Matters The Bank is subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Bank’s financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Bank must meet specific capital guidelines that involve quantitative measures of the Bank’s assets, liabilities and certain off-balance-sheet items as calculated under U.S. GAAP reporting requirements and regulatory capital standards. The Bank’s capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings and other factors. Furthermore, the Bank’s regulators could require adjustments to regulatory capital not reflected in these financial statements. Quantitative measures established by regulatory reporting standards to ensure capital adequacy require the Bank to maintain minimum amounts and ratios (set forth in the table below) of total and Tier I capital (as defined) to risk-weighted assets (as defined), common equity Tier I capital (as defined) to total risk-weighted assets (as defined) and of Tier I capital (as defined) to average assets (as defined). Management believes, as of December 31, 2023, that the Bank met all capital adequacy requirements to which it is subject. As of December 31, 2023 the most recent notification from the regulators categorized the Bank as well capitalized under the regulatory framework for prompt corrective action. To be categorized as well capitalized, the Bank must maintain minimum total risk-based capital, Tier I risk-based capital, common equity Tier I risk-based capital and Tier I leverage ratios as set forth in the table. There are no conditions or events since that notification that management believes have changed the Bank’s category. The Bank’s actual and required capital amounts and ratios are as follows (table amounts in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ To Be Well Capitalized ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Under ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Prompt Corrective ​ ​ ​ ​ ​ For Capital Adequacy ​ Action ​ ​ Actual Purposes ​ Provisions ​ Amount Ratio Amount Ratio Amount Ratio ​ ​ (Dollars in thousands) As of December 31, 2023 (as restated) ​ ​ ​ ​ Total Capital ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (to Risk-Weighted Assets) ​ $ 21,198 ​ 18.0 % $ 9,400 ​ 8.0 % $ 11,750 ​ 10.0 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tier 1 Capital ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (to Risk-Weighted Assets) ​ $ 20,231 17.2 % $ 7,050 6.0 % $ 9,400 8.0 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Common Equity Tier I Capital ​ ​ ​ ​ (to Risk-Weighted Assets) ​ $ 20,231 17.2 % $ 5,287 4.5 % $ 7,637 6.5 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tier I Capital ​ ​ ​ ​ (to Average Total Assets) ​ $ 20,231 12.3 % $ 6,553 4.0 % $ 8,192 5.0 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of September 30, 2023 ​ ​ ​ ​ Total Capital ​ ​ ​ ​ (to Risk-Weighted Assets) ​ $ 21,079 ​ 19.0 % $ 8,897 8.0 % $ 11,121 10.0 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tier 1 Capital ​ ​ ​ ​ ​ ​ ​ ​ ​ (to Risk-Weighted Assets) ​ $ 20,145 18.1 % $ 6,672 6.0 % $ 8,897 8.0 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Common Equity Tier I Capital ​ ​ ​ ​ (to Risk-Weighted Assets) ​ $ 20,145 18.1 % $ 5,004 4.5 % $ 7,228 6.5 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tier I Capital ​ ​ ​ ​ (to Average Total Assets) ​ $ 20,145 13.1 % $ 6,158 4.0 % $ 7,697 5.0 % ​

Disclosures about Fair Value of

Disclosures about Fair Value of Assets and Liabilities	3 Months Ended
	Dec. 31, 2023
Disclosures about Fair Value of Assets and Liabilities
Disclosures about Fair Value of Assets and Liabilities	Note 7: Disclosures about Fair Value of Assets and Liabilities Fair value is the exchange price that would be received to sell an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants at the measurement date. Fair value measurements must maximize the use of observable inputs and minimize the use of unobservable inputs. There is a hierarchy of three levels of inputs that may be used to measure fair value: Level 1 Level 2 Level 3 Recurring Measurements The following table presents the fair value measurements of assets recognized in the accompanying consolidated balance sheets measured at fair value on a recurring basis and the level within the fair value hierarchy in which the fair value measurements fall at December 31, 2023 and September 30, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements Using ​ ​ ​ ​ Quoted Prices in ​ Significant ​ ​ ​ ​ ​ ​ Active Markets ​ Other ​ Significant ​ ​ ​ ​ for ​ Observable ​ Unobservable ​ ​ Fair ​ Identical Assets ​ Inputs ​ Inputs ​ Value (Level 1) (Level 2) (Level 3) December 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasury securities ​ $ 980,000 ​ $ 980,000 ​ $ — ​ $ — U.S. Government agencies ​ ​ 3,292,584 ​ ​ — ​ ​ 3,292,584 ​ ​ — Mortgage-backed Government Sponsored Enterprises (GSEs) ​ 3,703,318 ​ — ​ 3,703,318 ​ — State and political subdivisions ​ 3,672,916 ​ — ​ 3,672,916 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2023 ​ ​ ​ ​ U.S. Treasury securities ​ $ 966,720 ​ $ 966,720 ​ $ — ​ $ — U.S. Government agencies ​ 3,824,770 ​ — ​ 3,824,770 ​ — Mortgage-backed Government Sponsored Enterprises (GSEs) ​ 3,232,231 ​ — ​ 3,232,231 ​ — State and political subdivisions ​ 3,425,994 ​ — ​ 3,425,994 ​ — ​ Following is a description of the valuation methodologies used for assets measured at fair value on a recurring basis and recognized in the accompanying balance sheets, as well as the general classification of such assets pursuant to the valuation hierarchy. There are no liabilities measured at fair value on a recurring basis. There have been no significant changes in the valuation techniques during the three months ended December 31, 2023 and the year ended September 30, 2023. Available-for-sale Securities Where quoted market prices are available in an active market, securities are classified within Level 1 of the valuation hierarchy. If quoted market prices are not available, then fair values are estimated by using quoted prices of securities with similar characteristics or independent asset pricing services and pricing models, the inputs of which are market-based or independently sourced market parameters, including, but not limited to, yield curves, interest rates, volatilities, prepayments, defaults, cumulative loss projections and cash flows. Such securities are classified in Level 2 of the valuation hierarchy. In certain cases where Level 1 or Level 2 are not available, securities are classified within Level 3 of the hierarchy. The Bank had no Level 3 securities. Nonrecurring Measurements The Bank had no assets or liabilities measured at fair value on a nonrecurring basis at December 31, 2023 and September 30, 2023. The estimated fair values of the Bank’s financial instruments not carried at fair value on the balance sheets are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Carrying ​ Fair ​ Fair Value Measurements Using ​ Value Value Level 1 Level 2 Level 3 December 31, 2023 ​ ​ ​ ​ ​ Financial assets: ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 7,635,217 ​ $ 7,635,217 ​ $ 7,635,217 ​ $ — ​ $ — Interest-bearing time deposits ​ 100,000 ​ 100,000 ​ 100,000 ​ — ​ — Loans held for sale ​ ​ 5,236,643 ​ ​ 5,236,643 ​ ​ — ​ ​ — ​ ​ 5,236,643 Loans, net ​ 133,546,656 ​ 122,830,501 ​ — ​ — ​ 122,830,501 FHLB Stock ​ 1,474,700 ​ 1,474,700 ​ — ​ 1,474,700 ​ — Bank owned life insurance ​ 1,794,889 ​ 1,794,889 ​ 1,794,889 ​ — ​ — Accrued interest receivable ​ 528,479 ​ 528,479 ​ 528,479 ​ — ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Financial liabilities: ​ ​ ​ ​ ​ Deposits ​ 130,775,912 ​ 132,266,386 ​ 89,431,386 ​ — ​ 42,835,000 FHLB advances ​ 11,000,000 ​ 11,000,000 ​ — ​ 11,000,000 ​ — Accrued interest payable ​ 130,180 ​ 130,180 ​ 130,180 ​ — ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2023 ​ ​ ​ ​ ​ Financial assets: ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 6,291,336 ​ $ 6,291,336 ​ $ 6,291,336 ​ $ — ​ $ — Interest-bearing time deposits ​ 100,000 ​ 100,000 ​ 100,000 ​ — ​ — Loans held for sale ​ ​ 3,094,405 ​ ​ 3,096,000 ​ ​ ​ ​ ​ ​ ​ ​ 3,096,000 Loans, net ​ 129,967,323 ​ 115,340,546 ​ — ​ — ​ 115,340,546 FHLB Stock ​ 1,368,900 ​ 1,368,900 ​ — ​ 1,368,900 ​ — Bank owned life insurance ​ 1,783,880 ​ 1,783,880 ​ 1,783,880 ​ — ​ — Accrued interest receivable ​ 456,867 ​ 456,867 ​ 456,867 ​ — ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Financial liabilities: ​ ​ ​ ​ ​ ​ Deposits ​ 122,815,748 ​ 123,426,791 ​ 90,497,791 ​ — ​ 32,929,000 FHLB advances ​ 12,000,000 ​ 12,001,000 ​ — ​ 12,001,000 ​ — Accrued interest payable ​ 69,434 ​ 69,434 ​ 69,434 ​ — ​ — ​ Limitations:

Commitments and Credit Risks

Commitments and Credit Risks	3 Months Ended
	Dec. 31, 2023
Commitments and Credit Risks
Commitments and Credit Risks	Note 8: Commitments and Credit Risks Commitments to originate loans are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since a portion of the commitments may expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. Each customer’s creditworthiness is evaluated on a case-by-case basis. The amount of collateral obtained, if deemed necessary, is based on management’s credit evaluation of the counterparty. Collateral held varies, but may include accounts receivable, inventory, property, plant and equipment, commercial real estate and residential real estate. Lines of credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Lines of credit generally have fixed expiration dates. Since a portion of the line may expire without being drawn upon, the total unused lines do not necessarily represent future cash requirements. Each customer’s creditworthiness is evaluated on a case-by-case basis. The amount of collateral obtained, if deemed necessary, is based on management’s credit evaluation of the counterparty. Collateral held varies but may include accounts receivable, inventory, property, plant and equipment, commercial real estate and residential real estate. Management uses the same credit policies in granting lines of credit as it does for on-balance-sheet instruments. Commitments outstanding were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ September 30, ​ ​ 2023 2023 Commitments to originate loans ​ $ 2,622,992 ​ $ 2,717,974 Undisbursed balance of loans closed ​ 8,469,628 ​ ​ 9,172,548 ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 11,092,620 ​ $ 11,890,522 ​ ​

Earnings Per Share

Earnings Per Share	3 Months Ended
	Dec. 31, 2023
Earnings Per Share
Earnings Per Share	Note 9: Earnings Per Share ​ Basic earnings per share is calculated by dividing net income by the weighted-average number of common shares outstanding during the period. Unallocated common shares held by the Employee Stock Ownership Plan (“ESOP”) are not included in the weighted-average number of common shares outstanding for purposes of calculating basic net income per common share until they are committed to be released. The following table sets forth the computation of basic and diluted earnings per share: ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ December 31, ​ ​ 2023 ​ ​ ​ ​ Net income (as restated) ​ $ 173,534 ​ ​ ​ ​ Weighted-average shares issued ​ 1,022,970 Less weighted-average unearned ESOP shares ​ ​ (81,779) ​ ​ ​ ​ Weighted-average shares outstanding ​ 941,191 ​ ​ ​ ​ Earnings per share (as restated) - basic and diluted ​ $ 0.18 ​

Conversion to Stock Form

Conversion to Stock Form	3 Months Ended
	Dec. 31, 2023
Conversion to Stock Form
Conversion to Stock Form	Note 10: Conversion to Stock Form On March 3, 2023, the Board of Directors of the Bank adopted a plan of conversion (Plan). The Plan was subject to the approval of the Federal Deposit Insurance Corporation and the State of Ohio Division of Financial Institutions and was approved by the affirmative vote of a majority of the total votes eligible to be cast by the voting members of the Bank at a special meeting. The Plan set forth that the Bank proposed to convert into a stock bank structure with the establishment of a stock holding company (Mercer Bancorp, Inc.), as parent of the Bank. The Bank converted to the stock form of ownership, followed by the issuance of all of the Bank’s outstanding stock to Mercer Bancorp, Inc. Pursuant to the Plan, the Bank determined the total offering value and number of shares of common stock based upon an independent appraiser’s valuation. The stock was priced at per share. In addition, the Bank’s Board of Directors adopted an employee stock ownership plan (ESOP) which subscribed for of the common stock sold in the offering. Mercer Bancorp, Inc. is organized as a corporation under the laws of the State of Maryland and owns all of the outstanding common stock of the Bank upon completion of the conversion. The costs of issuing the common stock was deducted from the sales proceeds of the offering. At the completion of the conversion to stock form, the Bank established a liquidation account in the amount of retained earnings contained in the final prospectus. The liquidation account will be maintained for the benefit of eligible savings account holders who maintain deposit accounts in the Bank after conversion. The conversion was accounted for as a change in corporate form with the historic basis of the Bank’s assets, liabilities and equity unchanged as a result. Mercer Bancorp, Inc.is an emerging growth company, and, for as long as it continues to be an emerging growth company, it may choose to take advantage of exemptions from various reporting requirements applicable to other public companies but not to “emerging growth companies.” Mercer Bancorp, Inc. intends to use the extended transition period to delay adoption of new or revised accounting pronouncements applicable to public companies until such pronouncements are made applicable to private companies. Accordingly, its financial statements may not be comparable to the financial statements of public companies that comply with such new or revised accounting standards. ​ ​

Nature of Operations and Summ_2

Nature of Operations and Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Dec. 31, 2023
Nature of Operations and Summary of Significant Accounting Policies
Nature of Operations	Nature of Operations Mercer Bancorp, Inc. (“Mercer Bancorp” or the “Company”) is a Maryland corporation incorporated on March 7, 2023, to serve as the bank holding company for Mercer Savings Bank (“Mercer Savings” or the “Bank”) in connection with the Bank’s conversion from the mutual form of organization to the stock form of organization (the “Conversion”). The Conversion was completed on July 26, 2023. In connection with the Conversion, Mercer Bancorp acquired Mercer Savings Bank (“Bank”) is an Ohio chartered stock bank engaged primarily in the business of providing a variety of deposit and lending services to individual customers in western Ohio. Its primary deposit products are checking, savings, and term certificate accounts, and its primary lending products are residential and commercial mortgage, agricultural, commercial, home equity lines of credit and installment loans, and indirect automobile loans. Its operations are conducted through its four office locations in Celina, Ft. Recovery and Greenville, Ohio. The Bank faces competition from other financial institutions and is subject to the regulation of certain federal and state agencies and undergoes periodic examinations by those regulatory authorities.
Principles of Consolidation	Principles of Consolidation The consolidated financial statements as of and for the three months ended December 31, 2023, include the accounts of Mercer Bancorp, Inc. and its wholly-owned subsidiary, the Bank. All intercompany transactions and balances have been eliminated in consolidation. The financial statements as of and for the three months ended December 31, 2022, represent the Bank only, as the conversion to stock form, including the formation of Mercer Bancorp, Inc., was completed on July 26, 2023. References herein to the “Company” for periods prior to the completion of the stock conversion should be deemed to refer to the “Bank”.
Revision of Prior Period Financial Statements	Revision of Prior Period Financial Statements. ​ The Company has revised the consolidated financial statements as of and for the year ended September 30, 2023. The revisions were considered necessary for two primary reasons, as follows: ​ (1) as a result of the recent discovery of several unpaid and unaccrued invoices, for legal services provided during the year ended September 30, 2023. The invoices represented services performed in connection with the Company’s initial public offering completed effective July 27, 2023, as well as for services performed subsequent to completion of the stock offering. ​ (2) the Company has revised the consolidated financial statements to record the effects of irrevocable (Rabbi) trusts that have been established for the benefit of two members of the board of directors. ​ The effect of the revisions to the September 30, 2023 consolidated financial statements related to the legal invoices were as follows: (a) a reduction to additional paid-in capital totaling $81,340, (b) an increase in legal expense of $32,398, (c) a decrease in income tax expense of $6,804, (d) an increase in accrued liabilities of $106,934 and (d) a decrease in retained earnings of $25,594. ​ The effect of the revisions to the September 30, 2023 consolidated financial statements related to the Rabbi trusts included the addition of two net effect on the total stockholder’s equity as previously reported. There were liabilities ​ The Company has concluded that the effect of the revisions to the consolidated financial statements as of and for the year ended September 30, 2023 were not material.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change relate to the determination of the allowance for credit losses, valuation of real estate acquired in connection with foreclosures or in satisfaction of loans, valuation of mortgage servicing rights and deferred tax assets and fair values of financial instruments.
Loans Held for Sale	Loans Held for Sale Mortgage and indirect auto loans originated and intended for sale in the secondary market are carried at the lower of cost or fair value in the aggregate. Net unrealized losses, if any, are recognized through a valuation allowance by charges to noninterest income. Gains and losses on loan sales are recorded in noninterest income, and direct loan origination costs and fees are deferred at origination of the loan and are recognized in noninterest income upon sale of the loan.
Loans	Loans Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at their outstanding principal balances, adjusted for unearned income, charge-offs, the allowance for credit losses and any unamortized deferred fees or costs on originated loans and unamortized premiums or discounts on purchased loans. For loans amortized at cost, interest income is accrued based on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, as well as premiums and discounts, are deferred and amortized as a level yield adjustment over the respective term of the loan. For all loan portfolio segments except residential and consumer loans, the Bank promptly charges-off loans, or portions thereof, when available information confirms that specific loans are uncollectible based on information that includes, but is not limited to, (1) the deteriorating financial condition of the borrower, (2) declining collateral values, and/or (3) legal action, including bankruptcy, that impairs the borrower’s ability to adequately meet its obligations. For impaired loans that are considered to be solely collateral dependent, a partial charge-off is recorded when a loss has been confirmed by an updated appraisal or other appropriate valuation of the collateral. The Bank charges-off loans, or portions thereof, when the Bank reasonably determines the amount of the loss. The Bank adheres to delinquency thresholds established by applicable regulatory guidance to determine the charge-off timeframe for these loans. Loans at these delinquency thresholds for which the Bank can clearly document that the loan is both well-secured and in the process of collection, such that collection will occur regardless of delinquency status, need not be charged off. For all classes, all interest accrued but not collected for loans that are placed on nonaccrual or charged off is reversed against interest income. The interest on these loans is accounted for on the cash basis or cost recovery method, until qualifying for return to accrual. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured. Nonaccrual loans are returned to accrual status when, in the opinion of management, the financial position of the borrower indicates there is no longer any reasonable doubt as to the timely collection of interest or principal. The Bank requires a period of satisfactory performance of not less than six months before returning a nonaccrual loan to accrual status. When cash payments are received on individually evaluated loans, the Bank records the payment as interest income unless collection of the remaining recorded principal amount is doubtful, at which time payments are used to reduce the principal balance of the loan. Loans to borrowers experiencing financial difficulties that have been modified recognize interest income on an accrual basis at the renegotiated rate if the loan is in compliance with the modified terms, no principal reduction has been granted and the loan has demonstrated the ability to perform in accordance with the renegotiated terms for a period of at least six months.
Allowance for Credit Losses	Allowance for Credit Losses The Company adopted ASU No. 2016-13 using the modified retrospective method for financial assets measured at amortized cost and off-balance-sheet credit exposures effective October 1, 2023 . Results for the period beginning after October 1, 2023 are presented under ASU No. 2016-13, while prior period amounts are reported in accordance with the previously applicable accounting standards . ​ A vailable-for-sale securities ​ For available for sale securities in an unrealized loss position, the Company first assesses whether it intends to sell, or it is more likely than not that it will be required to sell the security before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the security’s amortized cost basis is written down to fair value through income. ​ For securities available - for - sale that do not meet the above criteria, the Company evaluates whether the decline in fair value has resulted from credit losses or other factors. In making this assessment, the Company considers the extent to which fair value is less than amortized cost and adverse conditions related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of the cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for credit losses is recorded for the credit loss, limited by the amount that the fair value is less than the amortized cost. Any impairment that has not been recorded through an allowance for credit losses is recognized in other comprehensive income, net of tax. The Company elected the practical expedient of zero loss estimates for securities issued by U.S. government entities and agencies. These securities are either explicitly or implicitly guaranteed by the U.S. government, are highly rated by major agencies and have a long history of no credit losses. Management concluded that no allowance for credit losses was required on available-for-sale securities at October 1, 2023 and December 31, 2023. ​ Accrued interest receivable on available-for-sale debt securities totaled $53,536 at December 31, 2023 and is included within accrued interest receivable on the balance sheet. This amount is excluded from the estimate of expected credit losses. Held-to-maturity debt securities are typically classified as nonaccrual when the contractual payment of principal or interest has become 90 days past due or management has serious doubts about the further collectability of principal or interest. When held-to-maturity debt securities are placed on nonaccrual status, unpaid interest credited to income is reversed. ​ Held-to-Maturity Securities ​ The Company measures expected credit losses on held-to-maturity debt securities, which are comprised of U.S. government sponsored enterprise mortgage-back securities and residential mortgage-backed securities. The Company’s residential mortgage-backed security holdings are issued by U.S. government entities and agencies and are either explicitly or implicitly guaranteed by the U.S. government, are highly rated by major rating agencies and have a long history of no credit losses. Management concluded that no allowance for credit losses was required on held-to-maturity securities at October 1, 2023 and December 31, 2023. ​ Accrued interest receivable on held-to-maturity debt securities totaled $538 at December 31, 2023 and is included within accrued interest receivable on the balance sheet. This amount is excluded from the estimate of expected credit losses. Held-to-maturity debt securities are typically classified as nonaccrual when the contractual payment of principal or interest has become 90 days past due or management has serious doubts about the further collectability of principal or interest. When held-to-maturity debt securities are placed on nonaccrual status, unpaid interest credited to income is reversed. ​ Loans The allowance for credit losses (ACL) is a valuation allowance that is deducted from the loans’ amortized cost basis to present the net amount expected to be collected on the loans. Loan losses are charged against the allowance when management believes the collectibility of a loan balance is doubtful. Subsequent recoveries, if any, are credited to the allowance. etermination of the adequacy of the ACL is based on the assessment of the expected credit losses on loans over the expected life of the loan. The ACL is increased by provision expense and decreased by charge-offs, net of recoveries of amounts previously charged off and expected to be charged off. The Company made the policy election to exclude accrued interest receivable on loans from the estimate of credit losses. ​ Management estimates the ACL balance using relevant available information from both internal and external sources, relating to past events, current conditions and reasonable and supportable forecasts. Historical credit loss experience of a defined peer group, by affiliate, paired with economic forecasts provide the basis for the quantitatively modeled estimates of expected credit losses. The Company adjusts its quantitative model, as necessary, to reflect conditions not already considered by the quantitative model. These adjustments are commonly known as the qualitative factors. ​ The ACL is measured on a collective (pool) basis when similar risk characteristics exist. The Company uses the average historical loss method to measure the quantitative portion of the ACL over the forecast and reversion periods. ​ Loans that do not share risk characteristics are evaluated on an individual basis. Loans evaluated individually are not also included in the collective evaluation. When management determines that foreclosure is probable, expected credit losses are based on the fair value of the collateral at the reporting date, adjusted for selling costs as appropriate. ​ Expected credit losses are estimated over the contractual term of the loans, adjusted for expected prepayments when appropriate. The contractual term excludes expected extensions, renewals and modifications unless either of the following applies: management has a reasonable expectation at the reporting date that a troubled debt restructuring will be executed with an individual borrower or the extension or renewal options are included in the original or modified contract at the reporting date and are not unconditionally cancellable by the Company. ​ Unfunded Commitments ​ The Company estimates expected credit losses over the contractual period in which the Company is exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by the Company. The ACL on unfunded commitments is adjusted through the provision for credit loss expense. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded over its estimated life consistent with the related ACL methodology. Management concluded that no allowance for credit losses was required on unfunded commitments at October 1, 2023 and December 31, 2023. ​ Prior to October 1, 2023, the Company calculated the allowance for loan losses under the probable incurred methodology. ​ For periods prior to October 1, 2023 the allowance for loan losses is a valuation allowance for probable incurred credit losses. Loan losses are charged against the allowance when management believes the collectibility of a loan balance is doubtful. Subsequent recoveries, if any, are credited to the allowance. For periods prior to October 1, 2023 the allowance for loan losses is evaluated on a quarterly basis by management and is based upon management’s periodic review of the collectability of the loans in light of historical experience, the nature and volume of the loan portfolio, adverse situations that may affect the borrower’s ability to repay, estimated value of any underlying collateral and prevailing economic conditions. This evaluation is inherently subjective as it requires estimates that are susceptible to significant revision as more information becomes available. The allowance consists of allocated and general components. The allocated component relates to loans that are classified as impaired. For those loans that are classified as impaired, an allowance is established when the discounted cash flows (or collateral value or observable market price) of the impaired loan is lower than the carrying value of that loan. The general component covers nonimpaired loans and is based on historical charge-off experience by segment. The historical loss experience is determined by portfolio segment and is based on the actual loss history experienced by the Bank over the prior three years. Management believes the three-year historical loss experience methodology is appropriate in the current economic environment. Other adjustments (qualitative/environmental considerations) for each segment may be added to the allowance for each loan segment after an assessment of internal or external influences on credit quality that are not fully reflected in the historical loss or risk rating data. A loan is considered impaired when, based on current information and events, it is probable that the Bank will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Factors considered by management in determining impairment include payment history and the probability of collecting scheduled principal and interest payments when due, based on the loan’s current payment status and the borrower’s financial condition, including available sources of cash flows. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record and the amount of the shortfall in relation to the principal and interest owed. Impairment is generally measured on a loan-by-loan basis by either the present value of expected future cash flows discounted at the loan’s effective interest rate, the loan’s obtainable market price or the fair value of the collateral if the loan is collateral dependent. For impaired loans where the Bank utilizes the discounted cash flows to determine the level of impairment, the Bank includes the entire change in the present value of cash flows as a provision for loan losses. The fair values of collateral dependent impaired loans are based on independent appraisals of the collateral. In general, the Bank acquires an updated appraisal upon identification of impairment and annually thereafter for commercial, commercial real estate and multi-family loans. If the most recent appraisal is over a year old, and a new appraisal is not performed, due to lack of comparable values or other reasons, the existing appraisal is utilized and discounted based on the age of the appraisal, condition of the subject property and overall economic conditions. After determining the collateral value as described, the fair value is calculated based on the determined collateral value less selling expenses. The potential for outdated appraisal values is considered in our determination of the allowance for loan losses through our analysis of various trends and conditions including the local economy, trends in charge-offs and delinquencies and the related qualitative adjustments assigned by the Bank. Segments of loans with similar risk characteristics are collectively evaluated for impairment based on the segment’s historical loss experience adjusted for changes in trends, conditions and other relevant factors that affect repayment of the loans. In the course of working with borrowers, the Bank may choose to restructure the contractual terms of certain loans. In this scenario, the Bank attempts to work out an alternative payment schedule with the borrower in order to optimize collectibility of the loan. Any loans that are modified are reviewed by the Bank to identify if a troubled debt restructuring (“TDR”) has occurred, which is when, for economic or legal reasons related to a borrower’s financial difficulties, the Bank grants a concession to the borrower that it would not otherwise consider. Terms may be modified to fit the ability of the borrower to repay in line with the borrower’s current financial status, and the restructuring of the loan may include the transfer of assets from the borrower to satisfy the debt, a modification of loan terms or a combination of the two. If such efforts by the Bank do not result in a satisfactory arrangement, the loan is referred to legal counsel, at which time foreclosure proceedings are initiated. At any time prior to a sale of the property at foreclosure, the Bank may terminate foreclosure proceedings if the borrower is able to work out a satisfactory payment plan. It is the Bank’s policy that any restructured loans on nonaccrual status prior to being restructured remain on nonaccrual status until six months of satisfactory borrower performance, at which time management would consider its return to accrual status. If a loan was accruing at the time of restructuring, the Bank reviews the loan to determine if it is appropriate to continue the accrual of interest on the restructured loan. With regard to determination of the amount of the allowance for loan losses, troubled debt restructured loans are considered to be impaired. As a result, the determination of the amount of impaired loans for each portfolio segment within troubled debt restructurings is the same as detailed previously.
Employee Stock Ownership Plan (ESOP)	Employee Stock Ownership Plan (ESOP) The cost of shares issued to the Employee Stock Ownership Plan (“ESOP”), but not yet allocated to participants, is shown as a reduction of shareholders’ equity. Compensation expense is based on the average fair value of shares as they are committed to be released to participant accounts.
Earnings Per Share	Earnings Per Share Basic earnings per share is calculated by dividing net income by the weighted-average number of common shares outstanding during the period. Unallocated common shares held by the ESOP are shown as a reduction in shareholders’ equity and are excluded from weighted-average common shares outstanding for both basic and diluted earnings per share calculations until they are committed to be released. The Company had no dilutive or potentially dilutive securities during the three months ended December 31, 2023. Earnings per share is not applicable to the three months ended December 31, 2022, as the Company completed the stock offering and conversion to stock form on July 26, 2023.
Revenue Recognition	Revenue Recognition The Bank accounts for certain revenues in accordance with Accounting Standards Update (“ASU”) 2014-09 Revenue from Contracts with Customers Deposit Services. For deposit-related services, revenue is recognized when performance obligations are satisfied, which is, generally, at a point in time.

Debt Securities (Tables)

Debt Securities (Tables)	3 Months Ended
	Dec. 31, 2023
Debt Securities
Schedule of available-for-sale securities for amortized cost and fair values, together with gross unrealized gains and losses of securities	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross Gross ​ ​ ​ ​ Amortized ​ Unrealized ​ Unrealized ​ ​ ​ ​ Cost ​ Gains ​ Losses ​ Fair Value Available-for-sale Securities: ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasury securities ​ $ 999,740 ​ $ — ​ $ (19,740) ​ $ 980,000 U.S. Government agencies ​ 3,410,444 ​ — ​ (117,860) ​ 3,292,584 Mortgage-backed Government Sponsored Enterprises (GSEs) ​ 4,008,229 ​ — ​ (304,911) ​ 3,703,318 State and political subdivisions ​ 3,883,850 ​ 41,437 ​ (252,371) ​ 3,672,916 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 12,302,263 ​ $ 41,437 ​ $ (694,882) ​ $ 11,648,818 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross ​ Gross ​ ​ ​ ​ ​ Amortized ​ Unrealized ​ Unrealized ​ ​ ​ Cost Gains Losses Fair Value Available-for-sale Securities: ​ ​ ​ ​ September 30, 2023 ​ ​ ​ ​ U.S. Treasury securities ​ $ 999,565 ​ $ — ​ $ (32,845) ​ $ 966,720 U.S. Government agencies ​ 4,009,577 ​ — ​ (184,807) ​ 3,824,770 Mortgage-backed Government Sponsored Enterprises (GSEs) ​ 3,647,020 ​ — ​ (414,789) ​ 3,232,231 State and political subdivisions ​ 3,882,574 ​ — ​ (456,580) ​ 3,425,994 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 12,538,736 ​ $ — ​ $ (1,089,021) ​ $ 11,449,715
Schedule of held-to-maturity for amortized cost and fair values, together with gross unrealized gains and losses of securities	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross ​ Gross ​ ​ ​ ​ ​ Amortized ​ Unrealized ​ Unrealized ​ ​ ​ Cost Gains Losses Fair Value Held-to-maturity Securities: ​ ​ ​ ​ December 31, 2023 ​ ​ ​ ​ Mortgage-backed Government Sponsored Enterprises (GSEs) ​ $ 133,551 ​ $ — ​ $ (3,183) ​ $ 130,368 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2023 ​ ​ ​ ​ Mortgage-backed Government Sponsored Enterprises (GSEs) ​ $ 147,291 ​ $ — ​ $ (4,149) ​ $ 143,142
Schedule of amortized cost and fair value of available-for-sale securities by contractual maturity	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortized ​ Fair ​ Cost Value December 31, 2023 ​ ​ Within one year ​ $ 999,740 ​ $ 980,000 One to five years ​ 3,460,803 ​ 3,323,495 Five to ten years ​ 404,999 ​ 404,453 After ten years ​ 3,428,492 ​ 3,237,552 ​ ​ 8,294,034 ​ 7,945,500 Mortgage-backed GSEs ​ 4,008,229 ​ 3,703,318 Totals ​ $ 12,302,263 ​ $ 11,648,818
Schedule of gross unrealized losses and fair value of investments with unrealized losses, aggregated by investment class and length of time that individual securities have been in a continuous unrealized loss position	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2023 ​ ​ Less than 12 Months ​ 12 Months or More ​ Total ​ ​ Fair ​ Unrealized ​ Fair ​ Unrealized ​ Fair ​ Unrealized Description of Securities Value Losses Value Losses Value Losses Available for sale ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasury securities ​ $ — ​ $ — ​ $ 980,000 ​ $ (19,740) ​ $ 980,000 ​ $ (19,740) U.S. Government agencies ​ 404,453 ​ (545) ​ 2,888,130 ​ (117,315) ​ 3,292,583 ​ (117,860) Mortgage-backed Government Sponsored Enterprises (GSEs) ​ — ​ — ​ 3,217,524 ​ (304,911) ​ 3,217,524 ​ (304,911) State and political subdivisions ​ — ​ — ​ 2,078,985 ​ (252,371) ​ 2,078,985 ​ (252,371) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total temporarily impaired securities ​ $ 404,453 ​ $ (545) ​ $ 9,164,639 ​ $ (694,337) ​ $ 9,569,092 ​ $ (694,882) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2023 ​ ​ Less than 12 Months ​ 12 Months or More ​ Total ​ ​ Fair ​ Unrealized ​ Fair ​ Unrealized ​ Fair ​ Unrealized Description of Securities Value Losses Value Losses Value Losses Available for sale ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasury securities ​ $ — ​ $ — ​ $ 966,720 ​ $ (32,845) ​ $ 966,720 ​ $ (32,845) U.S. Government agencies ​ — ​ — ​ 3,824,770 ​ (184,807) ​ 3,824,770 ​ (184,807) Mortgage-backed Government Sponsored Enterprises (GSEs) ​ — ​ — ​ 3,232,231 ​ (414,789) ​ 3,232,231 ​ (414,789) State and political subdivisions ​ 1,481,544 ​ (71,136) ​ 1,944,450 ​ (385,444) ​ 3,425,994 ​ (456,580) ​ ​ 1,481,544 ​ (71,136) ​ 9,968,171 ​ (1,017,885) ​ 11,449,715 ​ (1,089,021) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Held to maturity ​ ​ ​ ​ ​ ​ Mortgage-backed Government Sponsored Enterprises (GSEs) ​ — ​ — ​ 143,142 ​ (4,149) ​ 143,142 ​ (4,149) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total temporarily impaired securities ​ $ 1,481,544 ​ $ (71,136) ​ $ 10,111,313 ​ $ (1,022,034) ​ $ 11,592,857 ​ $ (1,093,170)

Loans and Allowance for Credit

Loans and Allowance for Credit Losses (Tables)	3 Months Ended
	Dec. 31, 2023
Loans and Allowance for Credit Losses
Schedule of categories of loans	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ September 30, ​ ​ 2023 2023 Real estate loans: ​ ​ ​ ​ Residential ​ $ 73,290,421 ​ $ 74,561,278 ​ Multi-family ​ 1,297,142 ​ 1,309,586 ​ Agricultural ​ 40,949,888 ​ 36,378,192 ​ Commercial ​ 2,221,381 ​ 2,311,882 ​ Construction and land ​ 4,269,565 ​ 5,082,863 ​ Home equity line of credit (HELOC) ​ 4,871,656 ​ 4,708,023 ​ Commercial and industrial ​ 1,790,942 ​ 1,801,569 ​ Consumer ​ 7,710,352 ​ 7,652,164 ​ ​ ​ ​ ​ ​ ​ ​ ​ Total loans ​ 136,401,347 ​ 133,805,557 ​ ​ ​ ​ ​ ​ ​ ​ ​ Less: ​ ​ ​ Undisbursed loans in process ​ 1,563,513 ​ 2,578,282 ​ Net deferred loan fees ​ 324,585 ​ 325,621 ​ Allowance for credit losses ​ 966,593 ​ 934,331 ​ ​ ​ ​ ​ ​ ​ ​ ​ Net loans ​ $ 133,546,656 ​ $ 129,967,323 ​
Schedule of activity in the allowance for loan losses based on portfolio segment	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended December 31, 2023 ​ ​ ​ ​ Effect of ​ Provision ​ ​ ​ ​ ​ ​ ​ ​ Balance ​ adoption of ​ (credit) ​ ​ ​ ​ ​ Balance ​ October 1, 2023 ASC 326 ​ for credit losses Charge-offs Recoveries December 31, 2023 Real estate loans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential ​ $ 738,230 ​ $ 32,000 ​ $ 7,412 ​ $ — ​ $ — ​ $ 777,642 Multi-family ​ 12,840 ​ — ​ ​ (10,198) ​ — ​ — ​ 2,642 Agricultural ​ 73,608 ​ — ​ ​ 9,801 ​ — ​ — ​ 83,409 Commercial ​ 4,678 ​ — ​ ​ (153) ​ — ​ — ​ 4,525 Construction and land ​ 49,835 ​ — ​ ​ (9,550) ​ — ​ — ​ 40,285 Home equity line of credit (HELOC) ​ 14,289 ​ — ​ ​ 595 ​ — ​ — ​ 14,884 Commercial and industrial ​ 3,645 ​ — ​ ​ 3 ​ — ​ — ​ 3,648 Consumer ​ 37,206 ​ — ​ ​ 2,090 ​ — ​ 262 ​ 39,558 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total loans ​ $ 934,331 ​ $ 32,000 ​ $ — ​ $ — ​ $ 262 ​ $ 966,593 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended December 31, 2022 ​ ​ ​ ​ Provision ​ ​ ​ ​ ​ ​ ​ ​ Balance ​ (credit) ​ ​ ​ ​ ​ Balance ​ October 1, 2022 for loan losses Charge-offs Recoveries December 31, 2022 Real estate loans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential ​ $ 623,649 ​ $ 58,838 ​ $ (22,809) ​ $ — ​ $ 659,678 Multi-family ​ 11,008 ​ 1,669 ​ — ​ — ​ 12,677 Agricultural ​ 199,011 ​ (45,091) ​ — ​ — ​ 153,920 Commercial ​ 10,801 ​ (1,731) ​ — ​ — ​ 9,070 Construction and land ​ 35,292 ​ 3,515 ​ — ​ — ​ 38,807 Home equity line of credit (HELOC) ​ 69,234 ​ (22,170) ​ — ​ — ​ 47,064 Commercial and industrial ​ 12,086 ​ (3,079) ​ — ​ — ​ 9,007 Consumer ​ 22,573 ​ 8,049 ​ — ​ — ​ 30,622 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total loans ​ $ 983,654 ​ $ — ​ $ (22,809) ​ $ — ​ $ 960,845
Schedule of allowance for loan losses and the recorded investment in loans based on portfolio segment and impairment method	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Allowance for credit losses ​ Loans ​ ​ Ending balance, evaluated for expected credit losses ​ Ending balance, evaluated for expected credit losses ​ Individually Collectively Individually Collectively ​ ​ (In thousands) December 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ Real estate loans: ​ ​ ​ ​ Residential ​ $ — ​ $ 777,642 ​ $ 593,206 ​ $ 72,697,215 Multi-family ​ — ​ 2,642 ​ — ​ 1,297,142 Agricultural ​ — ​ 83,409 ​ — ​ 40,949,888 Commercial ​ — ​ 4,525 ​ — ​ 2,221,381 Construction and land ​ — ​ 40,285 ​ — ​ 4,269,565 Home equity line of credit (HELOC) ​ — ​ 14,884 ​ — ​ 4,871,656 Commercial and industrial ​ — ​ 3,648 ​ — ​ 1,790,942 Consumer ​ — ​ 39,558 ​ 20,831 ​ 7,710,352 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total loans ​ $ — ​ $ 966,593 ​ $ 614,037 ​ $ 135,808,141 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Allowance for loan losses ​ Loans ​ ​ Ending balance, evaluated for impairment ​ Ending balance, evaluated for impairment ​ Individually Collectively Individually Collectively September 30, 2023 ​ ​ ​ ​ ​ ​ ​ ​ Real estate loans: ​ ​ ​ ​ Residential ​ $ — ​ $ 738,230 ​ $ — ​ $ 74,561,278 Multi-family ​ — ​ 12,840 ​ — ​ 1,309,586 Agricultural ​ — ​ 73,608 ​ — ​ 36,378,192 Commercial ​ — ​ 4,678 ​ — ​ 2,311,882 Construction and land ​ — ​ 49,835 ​ — ​ 5,082,863 Home equity line of credit (HELOC) ​ — ​ 14,289 ​ — ​ 4,708,023 Commercial and industrial ​ — ​ 3,645 ​ — ​ 1,801,569 Consumer ​ — ​ 37,206 ​ — ​ 7,652,164 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total loans ​ $ — ​ $ 934,331 ​ $ — ​ $ 133,805,557
Schedule of credit quality indicators	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Term Loans Amortized Costs Basis by Origination Year ​ ​ ​ ​ ​ ​ ​ ​ ​ For The Years Ending September 30, ​ ​ ​ ​ 12/31/2023 2023 2022 2021 2020 2019 Prior Total December 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial real estate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk Rating ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ - ​ $ - ​ $ 1,482,676 ​ $ 500,008 ​ $ - ​ $ - ​ $ 238,697 ​ $ 2,221,381 Special Mention ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Substandard ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Doubtful ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Total ​ $ - ​ $ - ​ $ 1,482,676 ​ $ 500,008 ​ $ - ​ $ - ​ $ 238,697 ​ $ 2,221,381 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial real estate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current period gross charge-offs ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk Rating ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 44,800 ​ $ 3,991,745 ​ $ 71,092 ​ $ 71,266 ​ $ 51,998 ​ $ 12,996 ​ $ 25,667 ​ $ 4,269,565 Special Mention ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Substandard ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Doubtful ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Total ​ $ 44,800 ​ $ 3,991,745 ​ $ 71,092 ​ $ 71,266 ​ $ 51,998 ​ $ 12,996 ​ $ 25,667 ​ $ 4,269,565 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current period gross charge-offs ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial and industrial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk Rating ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 54,439 ​ $ 190,422 ​ $ 273,947 ​ $ 228,281 ​ $ 622,114 ​ $ 62,519 ​ $ 359,221 ​ $ 1,790,942 Special Mention ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Substandard ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Doubtful ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Total ​ $ 54,439 ​ $ 190,422 ​ $ 273,947 ​ $ 228,281 ​ $ 622,114 ​ $ 62,519 ​ $ 359,221 ​ $ 1,790,942 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial and industrial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current period gross charge-offs ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Multi Family ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk Rating ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ - ​ $ - ​ $ 973,664 ​ $ - ​ $ - ​ $ 175,906 ​ $ 147,573 ​ $ 1,297,142 Special Mention ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Substandard ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Doubtful ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Total ​ $ - ​ $ - ​ $ 973,664 ​ $ - ​ $ - ​ $ 175,906 ​ $ 147,573 ​ $ 1,297,142 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Term Loans Amortized Costs Basis by Origination Year ​ ​ ​ ​ ​ ​ ​ ​ ​ For The Years Ending September 30, ​ ​ ​ ​ 12/31/2023 2023 2022 2021 2020 2019 Prior Total ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Multi Family ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current period gross charge-offs ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agricultural ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk Rating ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 4,775,232 ​ $ 12,938,459 ​ $ 9,300,846 ​ $ 6,057,543 ​ $ 4,262,134 ​ $ 562,180 ​ $ 3,053,495 ​ $ 40,949,888 Special Mention ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Substandard ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Doubtful ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Total ​ $ 4,775,232 ​ $ 12,938,459 ​ $ 9,300,846 ​ $ 6,057,543 ​ $ 4,262,134 ​ $ 562,180 ​ $ 3,053,495 ​ $ 40,949,888 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Agricultural ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current period gross charge-offs ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk Rating ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 4,874,470 ​ $ 17,120,626 ​ $ 12,102,225 ​ $ 6,857,098 ​ $ 4,936,246 ​ $ 813,601 ​ $ 3,824,652 ​ $ 50,528,918 Special Mention ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Substandard ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Doubtful ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Total ​ $ 4,874,470 ​ $ 17,120,626 ​ $ 12,102,225 ​ $ 6,857,098 ​ $ 4,936,246 ​ $ 813,601 ​ $ 3,824,652 ​ $ 50,528,918 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Special ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass Mention Substandard Doubtful Total September 30, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate loans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential ​ $ 74,083,965 ​ $ — ​ $ 477,313 ​ $ — ​ $ 74,561,278 Multi-family ​ 1,309,586 ​ — ​ — ​ — ​ 1,309,586 Agricultural ​ 36,378,192 ​ — ​ — ​ — ​ 36,378,192 Commercial ​ 2,311,882 ​ — ​ — ​ — ​ 2,311,882 Construction and land ​ 5,082,863 ​ — ​ — ​ — ​ 5,082,863 Home equity line of credit (HELOC) ​ 4,708,023 ​ — ​ — ​ — ​ 4,708,023 Commercial and industrial ​ 1,801,569 ​ — ​ — ​ — ​ 1,801,569 Consumer ​ 7,652,164 ​ — ​ — ​ — ​ 7,652,164 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total loans ​ $ 133,328,244 ​ $ — ​ $ 477,313 ​ $ — ​ $ 133,805,557 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Term Loans Amortized Costs Basis by Origination Year ​ ​ ​ ​ ​ ​ ​ ​ ​ For The Years Ending September 30, ​ ​ ​ ​ 12/31/2023 2023 2022 2021 2020 2019 Prior Total December 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential real estate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Payment Performance ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Performing ​ $ 1,005,224 ​ $ 4,910,086 ​ $ 16,268,568 ​ $ 20,198,257 ​ $ 7,005,759 ​ $ 2,868,168 ​ $ 20,441,155 ​ $ 72,697,215 Nonperforming ​ ​ - ​ ​ - ​ ​ - ​ ​ 304,134 ​ ​ - ​ ​ - ​ ​ 289,072 ​ ​ 593,206 Total ​ $ 1,005,224 ​ $ 4,910,086 ​ $ 16,268,568 ​ $ 20,502,391 ​ $ 7,005,759 ​ $ 2,868,168 ​ $ 20,730,227 ​ $ 73,290,421 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential real estate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current period gross charge-offs ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Home equity ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Payment Performance ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Performing ​ $ 241,084 ​ $ 975,922 ​ $ 1,436,397 ​ $ 781,686 ​ $ 514,490 ​ $ 298,614 ​ $ 623,463 ​ $ 4,871,656 Nonperforming ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - Total ​ $ 241,084 ​ $ 975,922 ​ $ 1,436,397 ​ $ 781,686 ​ $ 514,490 ​ $ 298,614 ​ $ 623,463 ​ $ 4,871,656 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Home equity ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current period gross charge-offs ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Payment Performance ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Performing ​ $ 2,803 ​ $ 7,216,482 ​ $ 249,309 ​ $ 82,971 ​ $ 84,847 ​ $ 35,500 ​ $ 17,610 ​ $ 7,689,521 Nonperforming ​ ​ - ​ ​ 20,831 ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ - ​ ​ 20,831 Total ​ $ 2,803 ​ $ 7,237,313 ​ $ 249,309 ​ $ 82,971 ​ $ 84,847 ​ $ 35,500 ​ $ 17,610 ​ $ 7,710,352 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current period gross charge-offs ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ $ - ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Payment Performance ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Performing ​ $ 1,249,111 ​ $ 13,102,489 ​ $ 17,954,273 ​ $ 21,062,914 ​ $ 7,605,096 ​ $ 3,202,282 ​ $ 21,082,227 ​ $ 85,258,392 Nonperforming ​ ​ - ​ ​ 20,831 ​ ​ - ​ ​ 304,134 ​ ​ - ​ ​ - ​ ​ 289,072 ​ ​ 614,037 Total ​ $ 1,249,111 ​ $ 13,123,320 ​ $ 17,954,273 ​ $ 21,367,048 ​ $ 7,605,096 ​ $ 3,202,282 ​ $ 21,371,299 ​ $ 85,872,429
Schedule of loan portfolio aging analysis of the recorded investment in loans	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2023 ​ ​ ​ ​ ​ ​ Greater Than ​ ​ ​ ​ ​ ​ ​ ​ ​ 30-59 Days ​ 60-89 Days ​ 90 Days ​ Total ​ ​ ​ Total Loans ​ ​ Past Due Past Due Past Due Past Due Current Receivable Real estate loans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential ​ $ 484,091 ​ $ 296,092 ​ $ 593,206 ​ $ 1,373,389 ​ $ 71,917,032 ​ $ 73,290,421 ​ Multi-family ​ — ​ — ​ — ​ — ​ 1,297,142 ​ 1,297,142 ​ Agricultural ​ — ​ — ​ — ​ — ​ 40,949,888 ​ 40,949,888 ​ Commercial ​ — ​ — ​ — ​ — ​ 2,221,381 ​ 2,221,381 ​ Construction and land ​ — ​ — ​ — ​ — ​ 4,269,565 ​ 4,269,565 ​ Home equity line of credit (HELOC) ​ — ​ — ​ — ​ — ​ 4,871,656 ​ 4,871,656 ​ Commercial and industrial ​ — ​ — ​ — ​ — ​ 1,790,942 ​ 1,790,942 ​ Consumer ​ 121,834 ​ 4,919 ​ 20,831 ​ 147,584 ​ 7,562,768 ​ 7,710,352 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 605,925 ​ $ 301,011 ​ $ 614,037 ​ $ 1,520,973 ​ $ 134,880,374 ​ $ 136,401,347 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2023 ​ ​ ​ ​ ​ ​ Greater Than ​ ​ ​ ​ ​ ​ ​ ​ ​ 30-59 Days ​ 60-89 Days ​ 90 Days ​ Total ​ ​ ​ Total Loans ​ ​ Past Due Past Due Past Due Past Due Current Receivable Real estate loans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential ​ $ 482,844 ​ $ 332,929 ​ $ 477,313 ​ $ 1,293,086 ​ $ 73,268,192 ​ $ 74,561,278 ​ Multi-family ​ — ​ — ​ — ​ — ​ 1,309,586 ​ 1,309,586 ​ Agricultural ​ — ​ — ​ — ​ — ​ 36,378,192 ​ 36,378,192 ​ Commercial ​ — ​ — ​ — ​ — ​ 2,311,882 ​ 2,311,882 ​ Construction and land ​ — ​ — ​ — ​ — ​ 5,082,863 ​ 5,082,863 ​ Home equity line of credit (HELOC) ​ — ​ — ​ — ​ — ​ 4,708,023 ​ 4,708,023 ​ Commercial and industrial ​ — ​ — ​ — ​ — ​ 1,801,569 ​ 1,801,569 ​ Consumer ​ 5,653 ​ 20,831 ​ — ​ 26,484 ​ 7,625,680 ​ 7,652,164 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 488,497 ​ $ 353,760 ​ $ 477,313 ​ $ 1,319,570 ​ $ 132,485,987 ​ $ 133,805,557 ​
Schedule of Nonaccrual loans	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ September 30, ​ ​ 2023 2023 Residential real estate loans ​ $ 593,206 ​ $ 477,313 ​ Consumer ​ 20,831 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 614,037 ​ $ 477,313 ​

Regulatory Matters (Tables)

Regulatory Matters (Tables)	3 Months Ended
	Dec. 31, 2023
Regulatory Matters
Schedule of actual and required capital amounts and ratios	The Bank’s actual and required capital amounts and ratios are as follows (table amounts in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ To Be Well Capitalized ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Under ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Prompt Corrective ​ ​ ​ ​ ​ For Capital Adequacy ​ Action ​ ​ Actual Purposes ​ Provisions ​ Amount Ratio Amount Ratio Amount Ratio ​ ​ (Dollars in thousands) As of December 31, 2023 (as restated) ​ ​ ​ ​ Total Capital ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (to Risk-Weighted Assets) ​ $ 21,198 ​ 18.0 % $ 9,400 ​ 8.0 % $ 11,750 ​ 10.0 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tier 1 Capital ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (to Risk-Weighted Assets) ​ $ 20,231 17.2 % $ 7,050 6.0 % $ 9,400 8.0 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Common Equity Tier I Capital ​ ​ ​ ​ (to Risk-Weighted Assets) ​ $ 20,231 17.2 % $ 5,287 4.5 % $ 7,637 6.5 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tier I Capital ​ ​ ​ ​ (to Average Total Assets) ​ $ 20,231 12.3 % $ 6,553 4.0 % $ 8,192 5.0 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of September 30, 2023 ​ ​ ​ ​ Total Capital ​ ​ ​ ​ (to Risk-Weighted Assets) ​ $ 21,079 ​ 19.0 % $ 8,897 8.0 % $ 11,121 10.0 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tier 1 Capital ​ ​ ​ ​ ​ ​ ​ ​ ​ (to Risk-Weighted Assets) ​ $ 20,145 18.1 % $ 6,672 6.0 % $ 8,897 8.0 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Common Equity Tier I Capital ​ ​ ​ ​ (to Risk-Weighted Assets) ​ $ 20,145 18.1 % $ 5,004 4.5 % $ 7,228 6.5 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tier I Capital ​ ​ ​ ​ (to Average Total Assets) ​ $ 20,145 13.1 % $ 6,158 4.0 % $ 7,697 5.0 % ​

Disclosures about Fair Value _2

Disclosures about Fair Value of Assets and Liabilities (Tables)	3 Months Ended
	Dec. 31, 2023
Disclosures about Fair Value of Assets and Liabilities
Schedule of fair value measurements of assets measured at fair value on a recurring basis and the level within the fair value hierarchy	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurements Using ​ ​ ​ ​ Quoted Prices in ​ Significant ​ ​ ​ ​ ​ ​ Active Markets ​ Other ​ Significant ​ ​ ​ ​ for ​ Observable ​ Unobservable ​ ​ Fair ​ Identical Assets ​ Inputs ​ Inputs ​ Value (Level 1) (Level 2) (Level 3) December 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasury securities ​ $ 980,000 ​ $ 980,000 ​ $ — ​ $ — U.S. Government agencies ​ ​ 3,292,584 ​ ​ — ​ ​ 3,292,584 ​ ​ — Mortgage-backed Government Sponsored Enterprises (GSEs) ​ 3,703,318 ​ — ​ 3,703,318 ​ — State and political subdivisions ​ 3,672,916 ​ — ​ 3,672,916 ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2023 ​ ​ ​ ​ U.S. Treasury securities ​ $ 966,720 ​ $ 966,720 ​ $ — ​ $ — U.S. Government agencies ​ 3,824,770 ​ — ​ 3,824,770 ​ — Mortgage-backed Government Sponsored Enterprises (GSEs) ​ 3,232,231 ​ — ​ 3,232,231 ​ — State and political subdivisions ​ 3,425,994 ​ — ​ 3,425,994 ​ —
Schedule of carrying amount and estimated fair value of financial instruments	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Carrying ​ Fair ​ Fair Value Measurements Using ​ Value Value Level 1 Level 2 Level 3 December 31, 2023 ​ ​ ​ ​ ​ Financial assets: ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 7,635,217 ​ $ 7,635,217 ​ $ 7,635,217 ​ $ — ​ $ — Interest-bearing time deposits ​ 100,000 ​ 100,000 ​ 100,000 ​ — ​ — Loans held for sale ​ ​ 5,236,643 ​ ​ 5,236,643 ​ ​ — ​ ​ — ​ ​ 5,236,643 Loans, net ​ 133,546,656 ​ 122,830,501 ​ — ​ — ​ 122,830,501 FHLB Stock ​ 1,474,700 ​ 1,474,700 ​ — ​ 1,474,700 ​ — Bank owned life insurance ​ 1,794,889 ​ 1,794,889 ​ 1,794,889 ​ — ​ — Accrued interest receivable ​ 528,479 ​ 528,479 ​ 528,479 ​ — ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Financial liabilities: ​ ​ ​ ​ ​ Deposits ​ 130,775,912 ​ 132,266,386 ​ 89,431,386 ​ — ​ 42,835,000 FHLB advances ​ 11,000,000 ​ 11,000,000 ​ — ​ 11,000,000 ​ — Accrued interest payable ​ 130,180 ​ 130,180 ​ 130,180 ​ — ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2023 ​ ​ ​ ​ ​ Financial assets: ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 6,291,336 ​ $ 6,291,336 ​ $ 6,291,336 ​ $ — ​ $ — Interest-bearing time deposits ​ 100,000 ​ 100,000 ​ 100,000 ​ — ​ — Loans held for sale ​ ​ 3,094,405 ​ ​ 3,096,000 ​ ​ ​ ​ ​ ​ ​ ​ 3,096,000 Loans, net ​ 129,967,323 ​ 115,340,546 ​ — ​ — ​ 115,340,546 FHLB Stock ​ 1,368,900 ​ 1,368,900 ​ — ​ 1,368,900 ​ — Bank owned life insurance ​ 1,783,880 ​ 1,783,880 ​ 1,783,880 ​ — ​ — Accrued interest receivable ​ 456,867 ​ 456,867 ​ 456,867 ​ — ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Financial liabilities: ​ ​ ​ ​ ​ ​ Deposits ​ 122,815,748 ​ 123,426,791 ​ 90,497,791 ​ — ​ 32,929,000 FHLB advances ​ 12,000,000 ​ 12,001,000 ​ — ​ 12,001,000 ​ — Accrued interest payable ​ 69,434 ​ 69,434 ​ 69,434 ​ — ​ —

Commitments and Credit Risks (T

Commitments and Credit Risks (Tables)	3 Months Ended
	Dec. 31, 2023
Commitments and Credit Risks
Schedule of commitments outstanding	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ September 30, ​ ​ 2023 2023 Commitments to originate loans ​ $ 2,622,992 ​ $ 2,717,974 Undisbursed balance of loans closed ​ 8,469,628 ​ ​ 9,172,548 ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 11,092,620 ​ $ 11,890,522 ​ ​

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Dec. 31, 2023
Earnings Per Share
Schedule of computation of basic and diluted earnings per share	​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ December 31, ​ ​ 2023 ​ ​ ​ ​ Net income (as restated) ​ $ 173,534 ​ ​ ​ ​ Weighted-average shares issued ​ 1,022,970 Less weighted-average unearned ESOP shares ​ ​ (81,779) ​ ​ ​ ​ Weighted-average shares outstanding ​ 941,191 ​ ​ ​ ​ Earnings per share (as restated) - basic and diluted ​ $ 0.18 ​

Nature of Operations and Summ_3

Nature of Operations and Summary of Significant Accounting Policies (Details)		3 Months Ended		12 Months Ended
	Jul. 26, 2023 USD ($) $ / shares shares	Dec. 31, 2023 USD ($) Office shares	Dec. 31, 2022 USD ($)	Sep. 30, 2023 USD ($) director	Sep. 30, 2022 USD ($)
Property, Plant and Equipment [Line Items]
Number of office location | Office		4
Accrued interest receivable on available-for-sale debt securities		$ 53,536
Accrued interest receivable on held-to-maturity debt securities		538
Available-for-sale securities, allowance for credit losses		0
Held-to-maturity securities, allowance for credit losses		$ 0
Weighted average number diluted shares outstanding adjustment | shares		0
Benefit from irrevocable trust | director				2
Additional paid-in capital		$ (8,658,653)		$ (8,642,312)
Professional services		110,250	$ 51,353
income tax expense		(44,007)	(76,400)
Accrued interest payable and other liabilities		905,810		1,108,404
Retained earnings		(15,852,110)		(15,703,856)
Shares issued to irrevocable trust		96,360		96,360
Shares held in irrevocable trust		(96,360)		(96,360)
Total shareholders' equity		23,250,442	14,525,669	22,677,691	$ 14,056,330
Total assets		166,369,526		159,046,613
Total liabilities		143,119,084		136,368,922
Net income		173,534	$ 328,579
Restatement adjustment
Property, Plant and Equipment [Line Items]
Additional paid-in capital				81,340
Professional services		20,659		32,398
income tax expense		4,338		6,804
Accrued interest payable and other liabilities		16,321		106,934
Retained earnings		16,321		25,594
Shares issued to irrevocable trust				96,360
Shares held in irrevocable trust				96,360
Total shareholders' equity				0
Total assets				0
Total liabilities				0
Net income		$ (16,321)		$ 0
Mercer Savings Bank
Property, Plant and Equipment [Line Items]
Percentage of ownership acquired	100%
Number of shares offered and sold | shares	972,970
Price per share | $ / shares	$ 10
Gross offering proceeds	$ 9,729,700

Restatement of Previously Iss_2

Restatement of Previously Issued Financial Statements (Details) - USD ($)	3 Months Ended		12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Sep. 30, 2023
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Professional services	$ 110,250	$ 51,353
Provision for income taxes	44,007	$ 76,400
Accrued interest payable and other liabilities	905,810		$ 1,108,404
Retained earnings	$ 15,852,110		15,703,856
Earnings per share, basic	$ 0.18
Restatement adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Professional services	$ 20,659		32,398
Provision for income taxes	(4,338)		(6,804)
Accrued interest payable and other liabilities	16,321		106,934
Retained earnings	$ (16,321)		$ (25,594)
Earnings per share, basic	$ (0.02)

Change in Accounting Principle

Change in Accounting Principle (Details) - USD ($)	Oct. 01, 2023	Dec. 31, 2023	Sep. 30, 2023
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings		$ 15,852,110	$ 15,703,856
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase (Decrease) to the allowance for credit losses	$ 32,000
Retained earnings	$ 25,280

Debt Securities - Available for

Debt Securities - Available for Sale Debt Securities Fair Value to Amortized Cost (Details) - USD ($)	Dec. 31, 2023	Sep. 30, 2023
Available-for-sale Securities:
Amortized Cost	$ 12,302,263
Amortized cost		$ 12,538,736
Gross Unrealized Gains	41,437
Gross Unrealized Losses	(694,882)	(1,089,021)
Fair Value	11,648,818
Fair Value		11,449,715
U.S. Treasury securities
Available-for-sale Securities:
Amortized Cost	999,740
Amortized cost		999,565
Gross Unrealized Losses	(19,740)	(32,845)
Fair Value	980,000
Fair Value		966,720
U.S. Government agencies
Available-for-sale Securities:
Amortized Cost	3,410,444
Amortized cost		4,009,577
Gross Unrealized Losses	(117,860)	(184,807)
Fair Value	3,292,584
Fair Value		3,824,770
Mortgage-backed Government Sponsored Enterprises (GSEs)
Available-for-sale Securities:
Amortized Cost	4,008,229
Amortized cost		3,647,020
Gross Unrealized Losses	(304,911)	(414,789)
Fair Value	3,703,318
Fair Value		3,232,231
State and political subdivisions
Available-for-sale Securities:
Amortized Cost	3,883,850
Amortized cost		3,882,574
Gross Unrealized Gains	41,437
Gross Unrealized Losses	(252,371)	(456,580)
Fair Value	$ 3,672,916
Fair Value		$ 3,425,994

Debt Securities - Held-to-Matur

Debt Securities - Held-to-Maturity Fair Value to Amortized Cost (Details) - USD ($)	Dec. 31, 2023	Sep. 30, 2023
Held-to-maturity Securities:
Amortized Cost	$ 133,551
Amortized Cost		$ 147,291
Mortgage-backed Government Sponsored Enterprises (GSEs)
Held-to-maturity Securities:
Amortized Cost	133,551
Amortized Cost		147,291
Gross Unrealized Losses	(3,183)	(4,149)
Fair Value	$ 130,368	$ 143,142

Debt Securities - Amortized Cos

Debt Securities - Amortized Cost and Fair Value of Available-for-Sale Securities by Contractual Maturity (Details)	Dec. 31, 2023 USD ($)
Available-for-Sale: Amortized Cost
Within one year	$ 999,740
One to five years	3,460,803
Five to ten years	404,999
After ten years	3,428,492
Subtotal	8,294,034
Amortized Cost	12,302,263
Available-for-Sale: Fair Value
Due in one year or less	980,000
Due after one through five years	3,323,495
Due after five years through ten years	404,453
Due after ten years	3,237,552
Subtotal	7,945,500
Total	11,648,818
Mortgage-backed Government Sponsored Enterprises (GSEs)
Available-for-Sale: Amortized Cost
Securities not due at a single maturity date	4,008,229
Amortized Cost	4,008,229
Available-for-Sale: Fair Value
Securities not due at a single maturity date	3,703,318
Total	$ 3,703,318

Debt Securities - Narratives (D

Debt Securities - Narratives (Details)	3 Months Ended		12 Months Ended
	Dec. 31, 2023 USD ($) security	Dec. 31, 2022 USD ($)	Sep. 30, 2023 USD ($) security
Debt Securities
Carrying value of securities pledged as collateral	$ 476,000		$ 468,000
Debt Securities, Available-for-Sale, Restriction Type [Extensible Enumeration]	us-gaap:AssetPledgedAsCollateralMember		us-gaap:AssetPledgedAsCollateralMember
Proceeds from sales of available-for-sale securites	$ 0	$ 519,438
Gross realized losses	$ 8,049
Number of positions | security	19		23
Available-for-sale securities	$ 11,648,818
Total, Fair Value			$ 11,449,715
Total fair value of these investments	$ 9,569,092		$ 11,592,857
Percentage of fair value	83%		100%

Debt Securities - Continuous Un

Debt Securities - Continuous Unrealized Loss Positions (Details) - USD ($)	Dec. 31, 2023	Sep. 30, 2023
Available for sale, Fair Value:
Total, Fair Value		$ 11,449,715
12 Months or More, Fair Value		9,968,171
Less than 12 Months, Fair Value		1,481,544
Available for sale, Unrealized Losses:
Total, Unrealized Losses		(1,089,021)
12 Months or More, Unrealized Losses		(1,017,885)
Less than 12 Months, Unrealized Losses		(71,136)
Held to maturity, Unrealized Losses:
Total, Fair Value	$ 9,569,092	11,592,857
Total, Unrealized Losses	(694,882)	(1,093,170)
Less than 12 Months, Fair Value	404,453	1,481,544
12 Months or More, Fair Value	9,164,639	10,111,313
12 Months or More, Unrealized Losses	(694,337)	(1,022,034)
Less than 12 Months, Unrealized Losses	(545)	(71,136)
U.S. Treasury securities
Available for sale, Fair Value:
Total, Fair Value	980,000	966,720
12 Months or More, Fair Value	980,000	966,720
Available for sale, Unrealized Losses:
Total, Unrealized Losses	(19,740)	(32,845)
12 Months or More, Unrealized Losses		(32,845)
Less than 12 Months, Unrealized Losses	(19,740)
U.S. Government agencies
Available for sale, Fair Value:
Total, Fair Value	3,292,583	3,824,770
12 Months or More, Fair Value	2,888,130	3,824,770
Less than 12 Months, Fair Value	404,453
Available for sale, Unrealized Losses:
Total, Unrealized Losses	(117,860)	(184,807)
12 Months or More, Unrealized Losses	(117,315)	(184,807)
Less than 12 Months, Unrealized Losses	(545)
Mortgage-backed Government Sponsored Enterprises (GSEs)
Available for sale, Fair Value:
Total, Fair Value	3,217,524	3,232,231
12 Months or More, Fair Value	3,217,524	3,232,231
Available for sale, Unrealized Losses:
Total, Unrealized Losses	(304,911)	(414,789)
12 Months or More, Unrealized Losses	(304,911)	(414,789)
Held to maturity, Fair Value:
Total, Fair Value		143,142
12 Months or More, Fair Value		143,142
Held to maturity, Unrealized Losses:
12 Months or More, Unrealized Losses		(4,149)
Total, Unrealized Losses		(4,149)
State and political subdivisions
Available for sale, Fair Value:
Total, Fair Value	2,078,985	3,425,994
12 Months or More, Fair Value	2,078,985	1,944,450
Less than 12 Months, Fair Value		1,481,544
Available for sale, Unrealized Losses:
Total, Unrealized Losses	(252,371)	(456,580)
12 Months or More, Unrealized Losses	$ (252,371)	(385,444)
Less than 12 Months, Unrealized Losses		$ (71,136)

Loans and Allowance for Credi_2

Loans and Allowance for Credit Losses - Categories of Loans (Details) - USD ($)	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Categories of loans
Total loans	$ 136,401,347
Undisbursed loans in process	1,563,513
Net deferred loan fees	324,585
Allowance for credit losses	966,593
Net loans	133,546,656
Categories of loans
Total loans		$ 133,805,557
Undisbursed loans in process		2,578,282
Net deferred loan fees		325,621
Allowance for credit losses		934,331	$ 960,845	$ 983,654
Net loans		129,967,323
Real estate loan | Residential
Categories of loans
Total loans	73,290,421
Allowance for credit losses	777,642
Categories of loans
Total loans		74,561,278
Allowance for credit losses		738,230	659,678	623,649
Real estate loan | Multi-family
Categories of loans
Total loans	1,297,142
Allowance for credit losses	2,642
Categories of loans
Total loans		1,309,586
Allowance for credit losses		12,840	12,677	11,008
Real estate loan | Agricultural
Categories of loans
Total loans	40,949,888
Allowance for credit losses	83,409
Categories of loans
Total loans		36,378,192
Allowance for credit losses		73,608	153,920	199,011
Real estate loan | Commercial
Categories of loans
Total loans	2,221,381
Allowance for credit losses	4,525
Categories of loans
Total loans		2,311,882
Allowance for credit losses		4,678	9,070	10,801
Real estate loan | Construction and land
Categories of loans
Total loans	4,269,565
Allowance for credit losses	40,285
Categories of loans
Total loans		5,082,863
Allowance for credit losses		49,835	38,807	35,292
Real estate loan | Home equity line of credit (HELOC)
Categories of loans
Total loans	4,871,656
Allowance for credit losses	14,884
Categories of loans
Total loans		4,708,023
Allowance for credit losses		14,289	47,064	69,234
Commercial and industrial
Categories of loans
Total loans	1,790,942
Allowance for credit losses	3,648
Categories of loans
Total loans		1,801,569
Allowance for credit losses		3,645	9,007	12,086
Consumer
Categories of loans
Total loans	7,710,352
Allowance for credit losses	$ 39,558
Categories of loans
Total loans		7,652,164
Allowance for credit losses		$ 37,206	$ 30,622	$ 22,573

Loans and Allowance for Credi_3

Loans and Allowance for Credit Losses - Narratives (Details) - USD ($)	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Loans and Allowance for Loan Losses
Unpaid principal balances	$ 133,546,656
Unpaid principal balances		$ 129,967,323
Allowance for credit losses		934,331	$ 960,845	$ 983,654
Mortgage loans
Loans and Allowance for Loan Losses
Unpaid principal balances	$ 19,219,000
Unpaid principal balances		19,667,000
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13
Loans and Allowance for Loan Losses
Allowance for credit losses		$ 32,000

Loans and Allowance for Credi_4

Loans and Allowance for Credit Losses - Allowance for loan losses (Details) - USD ($)	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Activity in the allowance for loan losses based on portfolio segment
Recoveries	$ 262
Balance at end	966,593
Activity in the allowance for loan losses based on portfolio segment
Balance at beginning	934,331	$ 983,654
Charge-offs		(22,809)
Balance at end		960,845
Real estate loan | Residential
Activity in the allowance for loan losses based on portfolio segment
Provision (credit) for credit losses	7,412
Balance at end	777,642
Activity in the allowance for loan losses based on portfolio segment
Balance at beginning	738,230	623,649
Provision (credit) for loan losses		58,838
Charge-offs		(22,809)
Balance at end		659,678
Real estate loan | Multi-family
Activity in the allowance for loan losses based on portfolio segment
Provision (credit) for credit losses	(10,198)
Balance at end	2,642
Activity in the allowance for loan losses based on portfolio segment
Balance at beginning	12,840	11,008
Provision (credit) for loan losses		1,669
Balance at end		12,677
Real estate loan | Agricultural
Activity in the allowance for loan losses based on portfolio segment
Provision (credit) for credit losses	9,801
Balance at end	83,409
Activity in the allowance for loan losses based on portfolio segment
Balance at beginning	73,608	199,011
Provision (credit) for loan losses		(45,091)
Balance at end		153,920
Real estate loan | Commercial
Activity in the allowance for loan losses based on portfolio segment
Provision (credit) for credit losses	(153)
Balance at end	4,525
Activity in the allowance for loan losses based on portfolio segment
Balance at beginning	4,678	10,801
Provision (credit) for loan losses		(1,731)
Balance at end		9,070
Real estate loan | Construction and land
Activity in the allowance for loan losses based on portfolio segment
Provision (credit) for credit losses	(9,550)
Balance at end	40,285
Activity in the allowance for loan losses based on portfolio segment
Balance at beginning	49,835	35,292
Provision (credit) for loan losses		3,515
Balance at end		38,807
Real estate loan | Home equity line of credit (HELOC)
Activity in the allowance for loan losses based on portfolio segment
Provision (credit) for credit losses	595
Balance at end	14,884
Activity in the allowance for loan losses based on portfolio segment
Balance at beginning	14,289	69,234
Provision (credit) for loan losses		(22,170)
Balance at end		47,064
Commercial and industrial
Activity in the allowance for loan losses based on portfolio segment
Provision (credit) for credit losses	3
Balance at end	3,648
Activity in the allowance for loan losses based on portfolio segment
Balance at beginning	3,645	12,086
Provision (credit) for loan losses		(3,079)
Balance at end		9,007
Consumer
Activity in the allowance for loan losses based on portfolio segment
Provision (credit) for credit losses	2,090
Recoveries	262
Balance at end	39,558
Activity in the allowance for loan losses based on portfolio segment
Balance at beginning	37,206	22,573
Provision (credit) for loan losses		8,049
Balance at end		$ 30,622
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13
Activity in the allowance for loan losses based on portfolio segment
Balance at beginning	32,000
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13 | Real estate loan | Residential
Activity in the allowance for loan losses based on portfolio segment
Balance at beginning	$ 32,000

Loans and Allowance for Credi_5

Loans and Allowance for Credit Losses - Loans Evaluated for Impairment (Details) - USD ($)	Dec. 31, 2023	Sep. 30, 2023
Allowance for loan losses Ending balance, evaluated for impairment
Collectively Evaluated	$ 966,593	$ 934,331,000
Loans Ending balance, evaluated for impairment
Individually Evaluated	614,037
Collectively Evaluated	135,808,141	133,805,557,000
Real estate loan | Residential
Allowance for loan losses Ending balance, evaluated for impairment
Collectively Evaluated	777,642	738,230
Loans Ending balance, evaluated for impairment
Individually Evaluated	593,206
Collectively Evaluated	72,697,215	74,561,278
Real estate loan | Multi-family
Allowance for loan losses Ending balance, evaluated for impairment
Collectively Evaluated	2,642	12,840
Loans Ending balance, evaluated for impairment
Collectively Evaluated	1,297,142	1,309,586
Real estate loan | Agricultural
Allowance for loan losses Ending balance, evaluated for impairment
Collectively Evaluated	83,409	73,608
Loans Ending balance, evaluated for impairment
Collectively Evaluated	40,949,888	36,378,192
Real estate loan | Commercial
Allowance for loan losses Ending balance, evaluated for impairment
Collectively Evaluated	4,525	4,678
Loans Ending balance, evaluated for impairment
Collectively Evaluated	2,221,381	2,311,882
Real estate loan | Construction and land
Allowance for loan losses Ending balance, evaluated for impairment
Collectively Evaluated	40,285	49,835
Loans Ending balance, evaluated for impairment
Collectively Evaluated	4,269,565	5,082,863
Real estate loan | Home equity line of credit (HELOC)
Allowance for loan losses Ending balance, evaluated for impairment
Collectively Evaluated	14,884	14,289
Loans Ending balance, evaluated for impairment
Collectively Evaluated	4,871,656	4,708,023
Commercial and industrial
Allowance for loan losses Ending balance, evaluated for impairment
Collectively Evaluated	3,648	3,645
Loans Ending balance, evaluated for impairment
Collectively Evaluated	1,790,942	1,801,569
Consumer
Allowance for loan losses Ending balance, evaluated for impairment
Collectively Evaluated	39,558	37,206
Loans Ending balance, evaluated for impairment
Individually Evaluated	20,831
Collectively Evaluated	$ 7,710,352	$ 7,652,164

Loans and Allowance for Credi_6

Loans and Allowance for Credit Losses - Credit Quality Indicators for Other than Residential Real Estate Loans by Class (Details)	Dec. 31, 2023 USD ($)
Term Loans Amortized Costs Basis by Origination Year
Total loans	$ 136,401,347
Other than residential real estate loans
Term Loans Amortized Costs Basis by Origination Year
03/31/2024	4,874,470
2023	17,120,626
2022	12,102,225
2021	6,857,098
2020	4,936,246
2019	813,601
Prior	3,824,652
Total loans	50,528,918
Other than residential real estate loans | Pass
Term Loans Amortized Costs Basis by Origination Year
03/31/2024	4,874,470
2023	17,120,626
2022	12,102,225
2021	6,857,098
2020	4,936,246
2019	813,601
Prior	3,824,652
Total loans	50,528,918
Real estate loan | Commercial
Term Loans Amortized Costs Basis by Origination Year
2022	1,482,676
2021	500,008
Prior	238,697
Total loans	2,221,381
Real estate loan | Commercial | Pass
Term Loans Amortized Costs Basis by Origination Year
2022	1,482,676
2021	500,008
Prior	238,697
Total loans	2,221,381
Real estate loan | Construction and land
Term Loans Amortized Costs Basis by Origination Year
03/31/2024	44,800
2023	3,991,745
2022	71,092
2021	71,266
2020	51,998
2019	12,996
Prior	25,667
Total loans	4,269,565
Real estate loan | Construction and land | Pass
Term Loans Amortized Costs Basis by Origination Year
03/31/2024	44,800
2023	3,991,745
2022	71,092
2021	71,266
2020	51,998
2019	12,996
Prior	25,667
Total loans	4,269,565
Real estate loan | Multi-family
Term Loans Amortized Costs Basis by Origination Year
2022	973,664
2019	175,906
Prior	147,573
Total loans	1,297,142
Real estate loan | Multi-family | Pass
Term Loans Amortized Costs Basis by Origination Year
2022	973,664
2019	175,906
Prior	147,573
Total loans	1,297,142
Real estate loan | Agricultural
Term Loans Amortized Costs Basis by Origination Year
03/31/2024	4,775,232
2023	12,938,459
2022	9,300,846
2021	6,057,543
2020	4,262,134
2019	562,180
Prior	3,053,495
Total loans	40,949,888
Real estate loan | Agricultural | Pass
Term Loans Amortized Costs Basis by Origination Year
03/31/2024	4,775,232
2023	12,938,459
2022	9,300,846
2021	6,057,543
2020	4,262,134
2019	562,180
Prior	3,053,495
Total loans	40,949,888
Commercial and industrial
Term Loans Amortized Costs Basis by Origination Year
03/31/2024	54,439
2023	190,422
2022	273,947
2021	228,281
2020	622,114
2019	62,519
Prior	359,221
Total loans	1,790,942
Commercial and industrial | Pass
Term Loans Amortized Costs Basis by Origination Year
03/31/2024	54,439
2023	190,422
2022	273,947
2021	228,281
2020	622,114
2019	62,519
Prior	359,221
Total loans	$ 1,790,942

Loans and Allowance for Credi_7

Loans and Allowance for Credit Losses - Credit Quality Indicators (Details)	Sep. 30, 2023 USD ($)
Loans and Allowance for Loan Losses
Total loans	$ 133,805,557
Pass
Loans and Allowance for Loan Losses
Total loans	133,328,244
Substandard
Loans and Allowance for Loan Losses
Total loans	477,313
Real estate loan | Residential
Loans and Allowance for Loan Losses
Total loans	74,561,278
Real estate loan | Residential | Pass
Loans and Allowance for Loan Losses
Total loans	74,083,965
Real estate loan | Residential | Substandard
Loans and Allowance for Loan Losses
Total loans	477,313
Real estate loan | Multi-family
Loans and Allowance for Loan Losses
Total loans	1,309,586
Real estate loan | Multi-family | Pass
Loans and Allowance for Loan Losses
Total loans	1,309,586
Real estate loan | Agricultural
Loans and Allowance for Loan Losses
Total loans	36,378,192
Real estate loan | Agricultural | Pass
Loans and Allowance for Loan Losses
Total loans	36,378,192
Real estate loan | Commercial
Loans and Allowance for Loan Losses
Total loans	2,311,882
Real estate loan | Commercial | Pass
Loans and Allowance for Loan Losses
Total loans	2,311,882
Real estate loan | Construction and land
Loans and Allowance for Loan Losses
Total loans	5,082,863
Real estate loan | Construction and land | Pass
Loans and Allowance for Loan Losses
Total loans	5,082,863
Real estate loan | Home equity line of credit (HELOC)
Loans and Allowance for Loan Losses
Total loans	4,708,023
Real estate loan | Home equity line of credit (HELOC) | Pass
Loans and Allowance for Loan Losses
Total loans	4,708,023
Commercial and industrial
Loans and Allowance for Loan Losses
Total loans	1,801,569
Commercial and industrial | Pass
Loans and Allowance for Loan Losses
Total loans	1,801,569
Consumer
Loans and Allowance for Loan Losses
Total loans	7,652,164
Consumer | Pass
Loans and Allowance for Loan Losses
Total loans	$ 7,652,164

Loans and Allowance for Credi_8

Loans and Allowance for Credit Losses - Amortized Cost in Residential and Consumer Loans Based on Payment Activity (Details)	Dec. 31, 2023 USD ($)
Term Loans Amortized Costs Basis by Origination Year
Total loans	$ 136,401,347
Residential and consumer loans
Term Loans Amortized Costs Basis by Origination Year
03/31/2024	1,249,111
2023	13,123,320
2022	17,954,273
2021	21,367,048
2020	7,605,096
2019	3,202,282
Prior	21,371,299
Total loans	85,872,429
Residential and consumer loans | Performing
Term Loans Amortized Costs Basis by Origination Year
03/31/2024	1,249,111
2023	13,102,489
2022	17,954,273
2021	21,062,914
2020	7,605,096
2019	3,202,282
Prior	21,082,227
Total loans	85,258,392
Residential and consumer loans | Nonperforming
Term Loans Amortized Costs Basis by Origination Year
2023	20,831
2021	304,134
Prior	289,072
Total loans	614,037
Real estate loan | Residential
Term Loans Amortized Costs Basis by Origination Year
03/31/2024	1,005,224
2023	4,910,086
2022	16,268,568
2021	20,502,391
2020	7,005,759
2019	2,868,168
Prior	20,730,227
Total loans	73,290,421
Real estate loan | Residential | Performing
Term Loans Amortized Costs Basis by Origination Year
03/31/2024	1,005,224
2023	4,910,086
2022	16,268,568
2021	20,198,257
2020	7,005,759
2019	2,868,168
Prior	20,441,155
Total loans	72,697,215
Real estate loan | Residential | Nonperforming
Term Loans Amortized Costs Basis by Origination Year
2021	304,134
Prior	289,072
Total loans	593,206
Real estate loan | Home equity line of credit (HELOC)
Term Loans Amortized Costs Basis by Origination Year
03/31/2024	241,084
2023	975,922
2022	1,436,397
2021	781,686
2020	514,490
2019	298,614
Prior	623,463
Total loans	4,871,656
Real estate loan | Home equity line of credit (HELOC) | Performing
Term Loans Amortized Costs Basis by Origination Year
03/31/2024	241,084
2023	975,922
2022	1,436,397
2021	781,686
2020	514,490
2019	298,614
Prior	623,463
Total loans	4,871,656
Consumer
Term Loans Amortized Costs Basis by Origination Year
03/31/2024	2,803
2023	7,237,313
2022	249,309
2021	82,971
2020	84,847
2019	35,500
Prior	17,610
Total loans	7,710,352
Consumer | Performing
Term Loans Amortized Costs Basis by Origination Year
03/31/2024	2,803
2023	7,216,482
2022	249,309
2021	82,971
2020	84,847
2019	35,500
Prior	17,610
Total loans	7,689,521
Consumer | Nonperforming
Term Loans Amortized Costs Basis by Origination Year
2023	20,831
Total loans	$ 20,831

Loans and Allowance for Credi_9

Loans and Allowance for Credit Losses - Aging Analysis (Details) - USD ($)	Dec. 31, 2023	Sep. 30, 2023
Loans and Allowance for Loan Losses
Total loans	$ 136,401,347
Total loans		$ 133,805,557
Loan impaired		0
Collateral dependent
Loans and Allowance for Loan Losses
Total loans	0
30 - 59 Days Past Due
Loans and Allowance for Loan Losses
Total loans	605,925
Total loans		488,497
60 - 89 Days Past Due
Loans and Allowance for Loan Losses
Total loans	301,011
Total loans		353,760
Greater than 90 Days Past Due
Loans and Allowance for Loan Losses
Total loans	614,037
Total loans		477,313
Total Past Due
Loans and Allowance for Loan Losses
Total loans	1,520,973
Total loans		1,319,570
Current
Loans and Allowance for Loan Losses
Total loans	134,880,374
Total loans		132,485,987
Real estate loan | Residential
Loans and Allowance for Loan Losses
Total loans	73,290,421
Total loans		74,561,278
Real estate loan | Residential | 30 - 59 Days Past Due
Loans and Allowance for Loan Losses
Total loans	484,091
Total loans		482,844
Real estate loan | Residential | 60 - 89 Days Past Due
Loans and Allowance for Loan Losses
Total loans	296,092
Total loans		332,929
Real estate loan | Residential | Greater than 90 Days Past Due
Loans and Allowance for Loan Losses
Total loans	593,206
Total loans		477,313
Real estate loan | Residential | Total Past Due
Loans and Allowance for Loan Losses
Total loans	1,373,389
Total loans		1,293,086
Real estate loan | Residential | Current
Loans and Allowance for Loan Losses
Total loans	71,917,032
Total loans		73,268,192
Real estate loan | Multi-family
Loans and Allowance for Loan Losses
Total loans	1,297,142
Total loans		1,309,586
Real estate loan | Multi-family | Current
Loans and Allowance for Loan Losses
Total loans	1,297,142
Total loans		1,309,586
Real estate loan | Agricultural
Loans and Allowance for Loan Losses
Total loans	40,949,888
Total loans		36,378,192
Real estate loan | Agricultural | Current
Loans and Allowance for Loan Losses
Total loans	40,949,888
Total loans		36,378,192
Real estate loan | Commercial
Loans and Allowance for Loan Losses
Total loans	2,221,381
Total loans		2,311,882
Real estate loan | Commercial | Current
Loans and Allowance for Loan Losses
Total loans	2,221,381
Total loans		2,311,882
Real estate loan | Construction and land
Loans and Allowance for Loan Losses
Total loans	4,269,565
Total loans		5,082,863
Real estate loan | Construction and land | Current
Loans and Allowance for Loan Losses
Total loans	4,269,565
Total loans		5,082,863
Real estate loan | Home equity line of credit (HELOC)
Loans and Allowance for Loan Losses
Total loans	4,871,656
Total loans		4,708,023
Real estate loan | Home equity line of credit (HELOC) | Current
Loans and Allowance for Loan Losses
Total loans	4,871,656
Total loans		4,708,023
Commercial and industrial
Loans and Allowance for Loan Losses
Total loans	1,790,942
Total loans		1,801,569
Commercial and industrial | Current
Loans and Allowance for Loan Losses
Total loans	1,790,942
Total loans		1,801,569
Consumer
Loans and Allowance for Loan Losses
Total loans	7,710,352
Total loans		7,652,164
Consumer | 30 - 59 Days Past Due
Loans and Allowance for Loan Losses
Total loans	121,834
Total loans		5,653
Consumer | 60 - 89 Days Past Due
Loans and Allowance for Loan Losses
Total loans	4,919
Total loans		20,831
Consumer | Greater than 90 Days Past Due
Loans and Allowance for Loan Losses
Total loans	20,831
Consumer | Total Past Due
Loans and Allowance for Loan Losses
Total loans	147,584
Total loans		26,484
Consumer | Current
Loans and Allowance for Loan Losses
Total loans	$ 7,562,768
Total loans		$ 7,625,680

Loans and Allowance for Cred_10

Loans and Allowance for Credit Losses - Nonaccrual Loans (Details) - USD ($)	Dec. 31, 2023	Sep. 30, 2023
Loans and Allowance for Loan Losses
Nonaccrual loans	$ 614,037
Nonaccrual loans		$ 477,313
Real estate loan | Residential
Loans and Allowance for Loan Losses
Nonaccrual loans	593,206
Nonaccrual loans		$ 477,313
Consumer
Loans and Allowance for Loan Losses
Nonaccrual loans	$ 20,831

Loans and Allowance for Cred_11

Loans and Allowance for Credit Losses - Loans Modification (Details) - USD ($)	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Loans and Allowance for Credit Losses
Loans modified	$ 0
Loans modified in the past 12 months that subsequently defaulted	$ 0
Loans modified in a troubled debt restructuring		$ 0
Loans modified in the past 12 months that subsequently defaulted		$ 0

Regulatory Matters (Details)

Regulatory Matters (Details) $ in Thousands	Dec. 31, 2023 USD ($)	Sep. 30, 2023 USD ($)
Total Capital (to Risk-Weighted Assets)
Total Capital (to Risk-Weighted Assets), Actual, Amount	$ 21,198	$ 21,079
Total Capital (to Risk-Weighted Assets), Actual, Ratio (as a percent)	0.180	0.190
Total Capital, Amount Required for Capital Adequacy Purposes, Amount	$ 9,400	$ 8,897
Total Capital, Amount Required for Capital Adequacy Purposes, Ratio (as a percent)	0.080	0.080
Total capital, Amount Required To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 11,750	$ 11,121
Total capital, Amount Required To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio (as a percent)	0.100	0.100
Tier I Capital (to Risk-Weighted Assets)
Tier I Capital (to Risk-Weighted Assets), Actual, Amount	$ 20,231	$ 20,145
Tier I Capital (to Risk-Weighted Assets), Actual, Ratio (as a percent)	0.172	0.181
Tier I Capital, Amount Required for Capital Adequacy Purposes, Amount	$ 7,050	$ 6,672
Tier I Capital, Amount Required for Capital Adequacy Purposes, Ratio (as a percent)	0.060	0.060
Tier I Capital, Amount Required To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 9,400	$ 8,897
Tier I Capital, Amount Required To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio (as a percent)	0.080	0.080
Common Equity Tier I Capital (to Risk-Weighted Assets)
Common Equity Tier I Capital (to Risk-Weighted Assets), Actual, Amount	$ 20,231	$ 20,145
Common Equity Tier I Capital (to Risk-Weighted Assets), Actual, Ratio (as a percent)	0.172	0.181
Common Equity Tier I Capital, Amount Required for Capital Adequacy Purposes, Amount	$ 5,287	$ 5,004
Common Equity Tier I Capital, Amount Required for Capital Adequacy Purposes, Ratio (as a percent)	0.045	0.045
Common Equity Tier I Capital, Amount Required To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 7,637	$ 7,228
Common Equity Tier I Capital, Amount Required To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio (as a percent)	0.065	0.065
Tier 1 Capital (Average Total Assets)
Tier 1 Capital (Average Total Assets), Actual, Amount	$ 20,231	$ 20,145
Tier 1 Capital (Average Total Assets), Actual, Ratio (as a percent)	0.123	0.131
Tier 1 Capital (Average Total Assets), Amount Required for Capital Adequacy Purposes, Amount	$ 6,553	$ 6,158
Tier 1 Capital (Average Total Assets), Amount Required for Capital Adequacy Purposes, Ratio (as a percent)	0.040	0.040
Tier 1 Capital (Average Total Assets), Amount Required To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 8,192	$ 7,697
Tier 1 Capital (Average Total Assets), Amount Required To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio (as a percent)	0.050	0.050

Disclosures about Fair Value _3

Disclosures about Fair Value of Assets and Liabilities - Assets Measured at Fair Value (Details) - USD ($)	Dec. 31, 2023	Sep. 30, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 11,648,818
Fair Value	11,648,818
Fair Value		$ 11,449,715
U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	980,000
Fair Value	980,000
Fair Value		966,720
U.S. Government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	3,292,584
Fair Value	3,292,584
Fair Value		3,824,770
Mortgage-backed Government Sponsored Enterprises (GSEs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	3,703,318
Fair Value	3,703,318
Fair Value		3,232,231
State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	3,672,916
Fair Value	3,672,916
Fair Value		3,425,994
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities measured at fair value	0	0
Recurring | U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	980,000
Fair Value	980,000
Fair Value		966,720
Recurring | U.S. Government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	3,292,584
Fair Value	3,292,584
Fair Value		3,824,770
Recurring | Mortgage-backed Government Sponsored Enterprises (GSEs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	3,703,318
Fair Value	3,703,318
Fair Value		3,232,231
Recurring | State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	3,672,916
Fair Value	3,672,916
Fair Value		3,425,994
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	980,000
Fair Value	980,000
Fair Value		966,720
Recurring | Significant Other Observable Inputs (Level 2) | U.S. Government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	3,292,584
Fair Value	3,292,584
Fair Value		3,824,770
Recurring | Significant Other Observable Inputs (Level 2) | Mortgage-backed Government Sponsored Enterprises (GSEs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	3,703,318
Fair Value	3,703,318
Fair Value		3,232,231
Recurring | Significant Other Observable Inputs (Level 2) | State and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	3,672,916
Fair Value	3,672,916
Fair Value		3,425,994
Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities measured at fair value	0	0
Assets measured at fair value	$ 0	$ 0

Disclosures about Fair Value _4

Disclosures about Fair Value of Assets and Liabilities - Carrying Amount and Estimated Fair Value of Financial Instruments (Details) - USD ($)	Dec. 31, 2023	Sep. 30, 2023
Financial assets:
Bank owned life insurance	$ 1,794,889	$ 1,783,880
Recurring | Reported Value Measurement [Member]
Financial assets:
Cash and cash equivalents	7,635,217	6,291,336
Interest-bearing time deposits	100,000	100,000
Loans held for sale	5,236,643	3,094,405
Loans, net	133,546,656	129,967,323
FHLB Stock	1,474,700	1,368,900
Bank owned life insurance	1,794,889	1,783,880
Accrued interest receivable	528,479	456,867
Financial liabilities:
Deposits	130,775,912	122,815,748
FHLB advances	11,000,000	12,000,000
Accrued interest payable	130,180	69,434
Recurring | Estimate of Fair Value Measurement [Member]
Financial assets:
Cash and cash equivalents	7,635,217	6,291,336
Interest-bearing time deposits	100,000	100,000
Loans held for sale	5,236,643	3,096,000
Loans, net	122,830,501	115,340,546
FHLB Stock	1,474,700	1,368,900
Bank owned life insurance	1,794,889	1,783,880
Accrued interest receivable	528,479	456,867
Financial liabilities:
Deposits	132,266,386	123,426,791
FHLB advances	11,000,000	12,001,000
Accrued interest payable	130,180	69,434
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets:
Cash and cash equivalents	7,635,217	6,291,336
Interest-bearing time deposits	100,000	100,000
Bank owned life insurance	1,794,889	1,783,880
Accrued interest receivable	528,479	456,867
Financial liabilities:
Deposits	89,431,386	90,497,791
Accrued interest payable	130,180	69,434
Recurring | Significant Other Observable Inputs (Level 2)
Financial assets:
FHLB Stock	1,474,700	1,368,900
Financial liabilities:
FHLB advances	11,000,000	12,001,000
Recurring | Significant Unobservable Inputs (Level 3)
Financial assets:
Loans held for sale	5,236,643	3,096,000
Loans, net	122,830,501	115,340,546
Financial liabilities:
Deposits	$ 42,835,000	$ 32,929,000

Commitments and Credit Risks (D

Commitments and Credit Risks (Details) - USD ($)	Dec. 31, 2023	Sep. 30, 2023
Fair Value, off-Balance-Sheet Risks, Disclosure Information [Line Items]
Commitments outstanding	$ 11,092,620	$ 11,890,522
Commitments to originate loans
Fair Value, off-Balance-Sheet Risks, Disclosure Information [Line Items]
Commitments outstanding	2,622,992	2,717,974
Undisbursed balance of loans closed
Fair Value, off-Balance-Sheet Risks, Disclosure Information [Line Items]
Commitments outstanding	$ 8,469,628	$ 9,172,548

Earnings Per Share - (Details)

Earnings Per Share - (Details) - USD ($)	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Earnings Per Share
Net income	$ 173,534	$ 328,579
Weighted-average shares issued	1,022,970
Less weighted-average unearned ESOP shares	(81,779)
Weighted-average shares outstanding	941,191
Earnings per share, basic	$ 0.18
Earnings per share, diluted	$ 0.18

Conversion to Stock Form (Detai

Conversion to Stock Form (Details)	Mar. 03, 2023 $ / shares
Conversion to Stock Form
Share price	$ 10
Subscribe of ESOP	8%

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($)	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Pay vs Performance Disclosure
Net Income (Loss)	$ 173,534	$ 328,579

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Dec. 31, 2023
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false