NSTS Bancorp (NSTS) 10-K22 Mar 222021 FY Annual reportFinancial data

Company Profile

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
Document And Entity Information - USD ($)	Dec. 31, 2021	Mar. 15, 2022	Jun. 30, 2021
Document Information [Line Items]
Entity Central Index Key	0001881592
Entity Registrant Name	NSTS Bancorp, Inc.
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2021
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Document Transition Report	false
Entity File Number	001-41232
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	87-2522769
Entity Address, Address Line One	700 S. Lewis Ave.
Entity Address, City or Town	Waukegan
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60085
City Area Code	847
Local Phone Number	336-4430
Title of 12(b) Security	Common Stock, par value $0.01 share
Trading Symbol	NSTS
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	No
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
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Public Float			$ 0
Entity Common Stock, Shares Outstanding		5,397,959
Auditor Name	Plante & Moran, PLLC
Auditor Location	Chicago, Illinois
Auditor Firm ID	166

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Assets:
Cash and due from banks	$ 814,000	$ 884,000
Interest-bearing bank deposits	120,797,000	30,984,000
Cash and cash equivalents	121,611,000	31,868,000
Time deposits with other financial institutions	3,469,000	12,436,000
Securities available for sale	100,950,000	81,620,000
Federal Home Loan Bank stock	550,000	512,000
Loans held for sale	104,000	1,972,000
Loans, net of unearned income	97,313,000	99,325,000
Allowance for loan losses	(779,000)	(870,000)
Loans, net	96,534,000	98,455,000
Premises and equipment, net	5,087,000	5,213,000
Accrued interest receivable	641,000	672,000
Bank-owned life insurance (BOLI)	9,071,000	8,890,000
Other assets	2,852,000	581,000
Total assets	340,869,000	242,219,000
Deposits:
Noninterest bearing	99,090,000	9,734,000
Interest-bearing
Demand and NOW checking	17,931,000	16,364,000
Money market	45,414,000	50,143,000
Savings	50,312,000	42,251,000
Time deposits over $250,000	9,380,000	10,705,000
Other time deposits	63,494,000	57,207,000
Total deposits	285,621,000	186,404,000
Escrow deposits	1,442,000	1,519,000
Other borrowings	5,000,000	4,000,000
Accrued expenses and other liabilities	3,623,000	3,571,000
Total liabilities	295,686,000	195,494,000
Members' equity:
Retained earnings	45,264,000	45,319,000
Accumulated other comprehensive income, net	(81,000)	1,406,000
Total members' equity	45,183,000	46,725,000
Total liabilities and members' equity	$ 340,869,000	$ 242,219,000

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($)	12 Months Ended
Consolidated Statements of Operations - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Interest income:
Loans, including fees	$ 3,569,000	$ 4,086,000
Securities
Taxable	1,107,000	1,146,000
Tax-exempt	248,000	271,000
Federal funds sold and other	35,000	128,000
Time deposits with other financial institutions	66,000	379,000
FHLB Stock	13,000	13,000
Total interest income	5,038,000	6,023,000
Interest expense:
Deposits	940,000	1,488,000
Net interest income	4,098,000	4,535,000
(Reversal of) Provision for loan losses	(23,000)	464,000
Net interest income after provision for loan losses	4,121,000	4,071,000
Noninterest income:
Gain on sale of mortgage loans	410,000	788,000
Gain on sale of securities	131,000	59,000
Rental income on office building	42,000	42,000
Service charges on deposits	289,000	255,000
Increase in cash surrender value of BOLI	181,000	183,000
Other	156,000	264,000
Total noninterest income	1,209,000	1,591,000
Noninterest expense:
Salaries and employee benefits	3,352,000	3,691,000
Equipment and occupancy	665,000	689,000
Data processing	613,000	565,000
Professional services	139,000	484,000
Advertising	71,000	68,000
Supervisory fees and assessments	126,000	117,000
Loan expenses	129,000	141,000
Deposit expenses	183,000	155,000
Other	321,000	367,000
Total noninterest expense	5,599,000	6,277,000
Losses before income taxes	(269,000)	(615,000)
Income tax benefit	(214,000)	(503,000)
Net losses	$ (55,000)	$ (112,000)

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Net income (losses)	$ (55)	$ (112)
Unrealized net holding gain (loss) on securities
Unrealized net holding gain (loss) on securities arising during period, net of realized gains on sales of $131,000 and $59,000, in the years ended December 31, 2021 and 2020, respectively	(2,080)	1,501
Tax effect	593	(428)
Other comprehensive income, net of taxes	(1,487)	1,073
Comprehensive income (loss)	$ (1,542)	$ 961

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parentheticals) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Realized gains on sales	$ 131,000	$ 59,000

Consolidated Statements of Memb

Consolidated Statements of Members' Equity - USD ($) $ in Thousands	Total	Retained Earnings [Member]	AOCI Attributable to Parent [Member]
Balance at Dec. 31, 2019	$ 45,764	$ 45,431	$ 333
Net income (losses)	(112)	(112)	0
Change in net unrealized gain (loss) on securities available for sale, net	1,073	0	1,073
Balance at Dec. 31, 2020	46,725	45,319	1,406
Net income (losses)	(55)	(55)	0
Change in net unrealized gain (loss) on securities available for sale, net	(1,487)	0	(1,487)
Balance at Dec. 31, 2021	$ 45,183	$ 45,264	$ (81)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net losses	$ (55)	$ (112)
Adjustments to reconcile net losses to net cash (used in) provided by operating activities:
Depreciation	268	290
Securities amortization and accretion, net	1,323	835
Loans originated for sale	(19,302)	(37,725)
Proceeds from sales of loans held for sale	21,580	37,263
Gain on sale of mortgage loans	(410)	(788)
Gain on sale of securities available for sale	(131)	(59)
Gain on sale of OREO	(7)	0
Gain on transfer to OREO	(15)	0
(Reversal of) Provision for loan losses	(23)	464
Earnings on bank owned life insurance	(181)	(183)
Increase in accrued interest receivable and other assets	(1,647)	(272)
Net increase (decrease) in accrued expenses and other liabilities	52	(333)
Net cash provided by (used in) operating activities	1,452	(620)
Cash flows from investing activities:
Net (increase) decrease in portfolio loans	1,772	(1,241)
Principal repayments on mortgage-backed securities	17,552	12,730
Purchases of securities available for sale	(48,968)	(38,631)
Sales of securities available for sale	6,769	12,112
Maturities and calls of securities available for sale	2,045	1,465
Purchase of Federal Home Loan Bank Stock	(38)	0
Proceeds from sale of other real estate owned	194	0
Decrease in time deposits with other financial institutions, net	8,967	7,735
Purchases of premises and equipment, net	(142)	(104)
Net cash used in investing activities	(11,849)	(5,934)
Cash flows from financing activities:
Net change in deposits	99,217	2,033
Net change in escrow deposits	77	(10)
Repayment of FHLB Advance	(4,000)	0
Proceeds from FHLB Advance	5,000	4,000
Net cash provided by financing activities	100,140	6,043
Net change in cash and cash equivalents	89,743	(511)
Cash and cash equivalents at beginning of period	31,868	32,379
Cash and cash equivalents at end of period	121,611	31,868
Supplemental disclosures of cash flow information:
Loans transferred to OREO	172	0
Cash paid during the period for: Interest	948	1,543
Income taxes	$ 0	$ 37

Note 1 - Summary of Significant

Note 1 - Summary of Significant Accounting Policies	12 Months Ended
Note 1 - Summary of Significant Accounting Policies	Dec. 31, 2021
Notes to Financial Statements
Basis of Presentation and Significant Accounting Policies [Text Block]	1: The accompanying consolidated financial statements (“the financial statements”) have been prepared in conformity with accounting principles generally accepted in the United States of America and conform to practices within the banking industry. Nature of Operations NSTS Bancorp, Inc. was formed to serve as the stock holding company for North Shore Trust and Savings (the “Bank”) in connection with the conversion of North Shore Trust and Savings, NSTS Financial Corporation and North Shore MHC, into the stock form of organization, which was completed on January 18, 2022. December 31, 2021 not not December 31, 2021, January 18, 2022, 10 NSTS Bancorp, Inc. completed its stock offering on January 18, 2022. January 19, 2022 These financial statements include the accounts of North Shore MHC, a federal mutual holding company; its wholly owned subsidiary NSTS Financial Corporation, a stock holding company; and North Shore Trust and Savings (the “Bank”), a federal stock savings bank. The Bank operates primarily in the northern suburbs of Chicago, Illinois. The Bank offers a variety of financial services to customers in the surrounding community. Financial services consist primarily of 1 4 no one All significant intercompany balances and transactions have been eliminated in consolidation. Certain amounts in prior year financial statements have been reclassified to conform to the 2021 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 revenue and expenses during the reporting period. Actual results may The determination of the adequacy of the allowance for loan losses is based on estimates that are particularly susceptible to significant changes in the economic environment and market conditions. In connection with the determination of the estimated losses on loans, management obtains independent appraisals for significant collateral. The Bank’s loans are generally secured by specific items of collateral including real property, consumer assets, and business assets. Although the Bank has a diversified loan portfolio, a substantial portion of its debtors’ ability to honor their contracts is dependent on local economic conditions. While management uses available information to recognize losses on loans, further reductions in the carrying amounts of loans may may may Additional material estimates that are particularly susceptible to significant change in the near term include the determination of the valuation allowance on deferred tax assets and the valuation of investment securities. Comprehensive Income Comprehensive income includes net income (losses) and other changes in net worth which bypass the statement of operations. For all periods presented, other comprehensive income includes only one Cash and Cash Equivalents For purposes of reporting cash flows, cash and cash equivalents includes cash on hand and amounts due from banks, including cash items in process of clearing. Time Deposits with Other Financial Institutions Time deposits with other financial institutions are carried at cost and generally mature within the next two Investment Securities Securities are classified as available-for-sale and recorded at fair value, with unrealized gains and losses excluded from earnings and reported in other comprehensive income (loss). Discounts are accreted into interest income over the estimated life of the related security and premiums are amortized against income over the earlier of the call date or weighted average life of the related security using the level yield method. Gains and losses on the sale of securities are recorded on the trade date and are determined using the specific identification method. Securities available-for-sale are securities that are intended to be held for indefinite periods of time, but which may not may may The Bank conducts a periodic review of available-for-sale securities with declines in fair value below their cost to evaluate if the impairment is other than temporary. In estimating other-than-temporary impairment, management considers ( 1 2 3 Federal Home Loan Bank Stock The Bank, as a member of the Federal Home Loan Bank (FHLB) system, is required to maintain an investment in capital stock of the FHLB. Based on redemption provisions of the FHLB, the stock has no December 31, 2021 2020 Loans Held for Sale Mortgage loans originated and intended for sale in the secondary market are carried at the lower of cost or market value, as determined by outstanding commitments from investors. Net unrealized losses, if any, are recorded as a valuation allowance and charged to earnings. Mortgage loans held for sale are generally sold with servicing rights released. Gains or losses are recognized through earnings. Loans The Bank’s loan portfolio includes segments for mortgage loans and consumer loans. Mortgage loans include classes for 1 4 Loans that management has the intent and ability to hold for the foreseeable future or until maturity or pay-off generally are reported at their outstanding unpaid principal balances adjusted for charge offs, the allowance for loan losses, and any deferred fees or costs on originated loans. Interest income is accrued on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, are deferred and recognized as an adjustment to the related loan yield using the interest method, adjusted for prepayments. The accrual of interest on all loans is discontinued at the time the loan is 90 not Allowance for Loan Losses The allowance for loan losses (the “allowance”) is established as losses are estimated to have occurred through a provision for loan losses charged to earnings. Loan losses are charged against the allowance when management believes the uncollectibility of a loan balance is confirmed. Subsequent recoveries, if any, are credited to the allowance. The allowance for loan losses is evaluated on a regular basis by management. This evaluation is inherently subjective as it requires estimates that are susceptible to significant revision as more information becomes available. The allowance consists of general and allocated components, as further described below. General Component The general component of the allowance for loan losses is based on historical loss experience adjusted for qualitative factors stratified by the following loan segments: first The qualitative factors are determined based on the various risk characteristics of each loan segment. Risk characteristics relevant to each portfolio segment are as follows: Mortgage Loans 1 4 first not not Although terms for commercial real estate and multi-family residential loans vary, our underwriting standards generally allow for terms not not The Wall Street Journal Commercial real estate and multi-family residential lending involve a greater degree of risk than one four Consumer Loans Loans in this segment are generally to individuals and are supported by non-real estate collateral, such as deposit accounts and personal property. Unsecured loans are also included in this segment. Repayment is dependent on the credit quality of the individual borrower or borrowers. Allocated Component The allocated component relates to loans that are classified as impaired. Based on internal ratings, loans are evaluated for impairment on a loan-by-loan basis. Impairment is measured by either the present value of expected future cash flows discounted at the loan’s effective interest rate or the fair value of the collateral if the loan is collateral dependent. An allowance is established when the discounted cash flows (or collateral value) of the impaired loan is lower than the carrying value of that loan. 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 status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not The Bank periodically may Premises and Equipment Land is stated at cost. Property, improvements, and equipment are stated at cost less accumulated depreciation. Depreciation is determined under the straight-line method over the following estimated useful lives of assets: Years Land improvements 3 - 10 Office building and improvements 10 - 40 Furniture and equipment 3 - 10 Income Taxes Deferred taxes are recognized using the asset/liability method. Deferred tax assets are recognized for deductible temporary differences, operating loss and tax credit carryforwards; deferred tax liabilities are recognized for taxable temporary differences. Temporary differences are the differences between the financial statement amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not not When tax returns are filed, it is highly certain that some positions taken would be sustained upon examination by the taxing authorities, while others are subject to uncertainty about the merits of the position taken or the amount of the position that would be ultimately sustained. The benefit of a tax position is recognized in the financial statements in the period during which, based on all available evidence, management believes it is more likely than not not not 50% Interest and penalties associated with unrecognized tax benefits, if any, are classified as additional income taxes in the statement of operations. Bank management believes that the Bank maintains no uncertain tax positions for tax reporting purposes and accordingly, no The Bank is subject to U.S. federal income tax as well as income tax of the States of Illinois and Wisconsin. Other Real Estate Owned Property acquired in satisfaction of debt or through foreclosure is carried at the lower of cost or market value less estimated costs to sell. At foreclosure, if the fair value of the property acquired is less than the recorded investment in the related loan, a reduction in the carrying amount of the loan is recognized with a charge to the allowance for loan losses. The cost of carrying the assets subsequent to foreclosure and any decrease in the market value occurring after that date are charged to operating expenses as incurred. Bank-owned Life Insurance The Bank purchased life insurance policies on certain key executives. Bank-owned life insurance is recorded at the amount estimated to be realized under the insurance contract at the balance sheet date, which is the cash surrender value adjusted for other charges or amounts due which are probable at settlement. Service Charges on Deposits Service charges on deposits represent general service fees for monthly account maintenance and activity or transaction-based fees and consist of transaction-based revenue, time-based revenue (service period), item-based revenue, or some other individual attribute-based revenue. Revenue is recognized when the Bank’s performance obligation is completed, which is generally monthly for account maintenance services or when a transaction has been completed (such as a wire transfer). Payment for such performance obligations are generally received at the time performance obligations are satisfied. Dividend Restrictions Banking regulations require maintaining certain capital levels and may Transfers of Financial Assets Transfers of financial assets are accounted for as sales when control over the assets has been relinquished. Control over transferred assets is deemed to be surrendered when the assets have been isolated from the Bank, the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets, and the Bank does not

Note 2 - Securities

Note 2 - Securities	12 Months Ended
Note 2 - Securities	Dec. 31, 2021
Notes to Financial Statements
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]	Note 2: The amortized cost and estimated fair value of debt securities at December 31, 2021 2020 may may 1 5 December 31, 2021 U.S. government agency obligations Municipal obligations Mortgage-backed residential obligations Collateralized mortgage obligations Total available-for-sale (Dollars in thousands) 1 year or less $ — $ 1,631 $ 356 $ 1,064 $ 3,051 1 to 5 years 5,587 3,941 29,375 16,097 55,000 5 to 10 years 4,466 2,244 12,417 11,976 31,103 After 10 years $ — 10,184 — 1,612 11,796 Fair value $ 10,053 $ 18,000 $ 42,148 $ 30,749 $ 100,950 Gross unrealized gains 73 423 259 279 1,034 Gross unrealized losses (78 ) (14 ) (612 ) (443 ) (1,147 ) Amortized cost $ 10,058 $ 17,591 $ 42,501 $ 30,913 $ 101,063 December 31, 2020 U.S. government agency obligations Municipal obligations Mortgage-backed residential obligations Collateralized mortgage obligations Total available-for-sale (Dollars in thousands) 1 year or less $ 1,000 $ 769 $ 1,443 $ 382 $ 3,594 1 to 5 years 4,863 3,726 34,485 14,452 $ 57,526 5 to 10 years 1,284 4,353 7,166 5,565 $ 18,368 After 10 years — 2,132 — — $ 2,132 Fair value $ 7,147 $ 10,980 $ 43,094 $ 20,399 $ 81,620 Gross unrealized gains 153 518 883 534 $ 2,088 Gross unrealized losses (17 ) (18 ) (21 ) (66 ) $ (122 ) Amortized cost $ 7,011 $ 10,480 $ 42,232 $ 19,931 $ 79,654 As of December 31, 2021 2020 December 31, 2021 2020, one 10% Information pertaining to securities with gross unrealized losses at December 31, 2021 2020 Less than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized December 31, 2021 Value Losses Value Losses Value Losses (Dollars in thousands) U.S. government agency obligations $ 4,020 $ 62 $ 1,105 $ 16 $ 5,125 $ 78 Municipal obligations 2,399 8 247 6 2,646 14 Mortgage-backed residential obligations 26,540 535 2,781 77 29,321 612 Collateralized mortgage obligations 16,715 338 4,386 105 21,101 443 Total $ 49,674 $ 943 $ 8,519 $ 204 $ 58,193 $ 1,147 December 31, 2020 U.S. government agency obligations $ 1,284 $ 17 $ - $ — $ 1,284 $ 17 Municipal obligations — — 238 18 238 18 Mortgage-backed residential obligations 5,265 16 1,170 5 6,435 21 Collateralized mortgage obligations 8,694 66 241 — 8,935 66 Total $ 15,243 $ 99 $ 1,649 $ 23 $ 16,892 $ 122 At December 31, 2021 2020 not not The following table represents the proceeds from the sale of securities available-for-sale and the related gross gains and losses during the periods presented. At December 31, 2021 2020 (Dollars in thousands) Sales of securities available for sale $ 6,769 $ 12,112 Gross gain realized on the sale of securities available for sale 131 114 Gross loss realized on the sale of securities available for sale — (55 )

Note 3 - Loans

Note 3 - Loans	12 Months Ended
Note 3 - Loans	Dec. 31, 2021
Notes to Financial Statements
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]	Note 3: A summary of loans by major category as of December 31, 2021 2020 2021 2020 (Dollars in thousands) First mortgage loans 1-4 family residential $ 88,028 $ 87,198 Multi-family 3,497 5,736 Commercial 4,604 5,340 Total first mortgage loans 96,129 98,274 Consumer loans 372 385 Total loans 96,501 98,659 Net deferred loan costs 812 666 Allowance for loan losses (779 ) (870 ) Total loans, net $ 96,534 $ 98,455 First mortgage loans serviced for others are not December 31, 2021 2020 December 31, 2021 2020 In the normal course of business, loans are made to directors and officers of the Bank (related parties). The terms of these loans, including interest rate and collateral, are similar to those prevailing for comparable transactions with other customers and do not December 31, 2021 2020

Note 4 - Allowance for Loan Los

Note 4 - Allowance for Loan Losses	12 Months Ended
Note 4 - Allowance for Loan Losses	Dec. 31, 2021
Notes to Financial Statements
Allowance for Credit Losses [Text Block]	Note 4: Changes in the allowance for loan losses and the related loan balance information by portfolio segment as of and for the years ended December 31, 2021 2020 December 31, 2021 1-4 family residential Multi-family Commercial Consumer Total (Dollars in thousands) Year ended: Beginning balance $ 798 29 38 5 $ 870 Charge-offs — — — (99 ) (99 ) Recoveries 31 — — — 31 Net recoveries (charge-offs) 31 — — (99 ) (68 ) Provision for loan losses (154 ) 40 (13 ) 104 (23 ) Ending balance $ 675 69 25 10 $ 779 December 31, 2020 1-4 family residential Multi-family Commercial Consumer Total (Dollars in thousands) Year ended: Beginning balance $ 362 10 9 8 $ 389 Charge-offs — — — — — Recoveries 17 — — — 17 Net recoveries (charge-offs) 17 — — — 17 Provision for loan losses 419 19 29 (3 ) 464 Ending balance $ 798 29 38 5 $ 870 The balance in the allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment method as of December 31, 2021 2020, Collectively evaluated Individually evaluated Total Allowance for loan losses Recorded investment in loans Allowance for loan losses Recorded investment in loans Allowance for loan losses Recorded investment in loans (Dollars in thousands) December 31, 2021 1-4 family residential $ 557 $ 86,892 $ 118 $ 1,136 $ 675 $ 88,028 Multi-family 69 3,497 — — 69 3,497 Commercial 25 4,604 — — 25 4,604 Consumer 10 372 — — 10 372 Total $ 661 $ 95,365 $ 118 $ 1,136 $ 779 $ 96,501 December 31, 2020 1-4 family residential $ 648 $ 84,775 $ 150 $ 2,423 $ 798 $ 87,198 Multi-family 29 5,736 — — 29 5,736 Commercial 38 5,340 — — 38 5,340 Consumer 5 286 — 99 5 385 Total $ 720 $ 96,137 $ 150 $ 2,522 $ 870 $ 98,659 The Bank evaluates collectability based on payment activity and other factors. The Bank uses a graded loan rating system as a means of identifying potential problem loans, as follows: Pass Loans in these categories are performing as expected with low to average risk. Special Mention Loans in this category are internally designated by management as “watch loans.” These loans are starting to show signs of potential weakness and are closely monitored by management. Substandard Loans in this category are internally designated by management as “substandard.” Generally, a loan is considered substandard if it is inadequately protected by the paying capacity of the obligors or the current net worth of the collateral pledged. Substandard loans present a distinct possibility that the Bank will sustain losses if such weaknesses are not Doubtful Loans classified as doubtful have all the weaknesses inherent in those designated as “substandard” with the added characteristic that the weaknesses may On an annual basis, or more often if needed, the Bank formally reviews the ratings on commercial loans. In addition, the Bank performs an independent review of a significant portion of the commercial loan portfolio. Management uses the results of the independent review as part of its annual review process. The following table presents loan balances based on risk rating by class of loans as of December 31, 2021 2020 Special Pass Mention Substandard Doubtful Total loans (Dollars in thousands) December 31, 2021 1-4 family residential $ 87,881 $ 45 $ 102 $ — $ 88,028 Multi-family 3,497 — — — 3,497 Commercial 4,604 — — — 4,604 Consumer 372 — — — 372 Total $ 96,354 $ 45 $ 102 $ — $ 96,501 December 31, 2020 1-4 family residential $ 86,501 $ 417 $ 280 $ — $ 87,198 Multi-family 5,736 — — — 5,736 Commercial 5,340 — — — 5,340 Consumer 286 99 — — 385 Total $ 97,863 $ 516 $ 280 $ — $ 98,659 The aging of the Bank’s loan portfolio by class of loans as of December 31, 2021 2020 31-89 Days Past Due and Accruing Greater than 90 Days Past Due and Accruing Non-Accrual Total Past Due and Non-Accrual Current Total Loan Balance (Dollars in thousands) December 31, 2021 1-4 family residential $ — $ 41 $ 102 $ 143 $ 87,885 $ 88,028 Multi-family — — — — 3,497 3,497 Commercial — — — — 4,604 4,604 Consumer — — — — 372 372 Total $ — $ 41 $ 102 $ 143 $ 96,358 $ 96,501 December 31, 2020 1-4 family residential $ — $ 75 $ 280 $ 355 $ 86,843 $ 87,198 Multi-family — — — — 5,736 5,736 Commercial — — — — 5,340 5,340 Consumer 99 — — 99 286 385 Total $ 99 $ 75 $ 280 $ 454 $ 98,205 $ 98,659 Loans individually evaluated for impairment by class of loans as of December 31, 2021 2020 Recorded investment Unpaid principal balance Related allowance Average recorded investment Interest income recognized (Dollars in thousands) December 31, 2021 With no related allowance recorded 1-4 family residential $ 355 $ 595 $ — $ 348 $ 26 Multi-family — — — — — Commercial — — — — — Consumer — — — — — Total $ 355 $ 595 $ — $ 348 $ 26 With a related allowance recorded 1-4 family residential $ 781 $ 797 $ 118 $ 797 $ 35 Multi-family — — — — — Commercial — — — — — Consumer — — — — — Total $ 781 $ 797 $ 118 $ 797 $ 35 Total individually assessed as of December 31, 2021 $ 1,136 $ 1,392 $ 118 $ 1,145 $ 61 December 31, 2020 With no related allowance recorded 1-4 family residential $ 1,348 $ 1,676 $ — $ 1,382 $ 73 Multi-family — — — — — Commercial — — — — — Consumer 99 99 — 89 6 Total $ 1,447 $ 1,775 $ — $ 1,471 $ 79 With a related allowance recorded 1-4 family residential $ 1,075 $ 1,120 $ 150 $ 1,104 $ 51 Multi-family — — — — — Commercial — — — — — Consumer — — — — — Total $ 1,075 $ 1,120 $ 150 $ 1,104 $ 51 Total individually assessed as of December 31, 2020 $ 2,522 $ 2,895 $ 150 $ 2,575 $ 130 The recorded investment in loans excludes accrued interest receivable and loan origination fees, net, due to immateriality. For purposes of this disclosure, the unpaid principal balance is not Troubled debt restructurings provide for modifications to repayment terms; more specifically, modifications to loan interest rates. Management performs an impairment analysis at the time of restructuring and periodically thereafter. Any reserve required is recorded through a provision to the allowance for loan losses. There were no new troubled debt restructurings during the years ended December 31, 2021 2020 March 2021, 19 The Company has minimal direct exposure to consumer, commercial, and other small businesses that may 19, not 19. December 31, 2021 not 19. December 31, 2021, 19 December 31, 2021, April 3, 2020. December 31, 2021,

Note 5 - Premises and Equipment

Note 5 - Premises and Equipment	12 Months Ended
Note 5 - Premises and Equipment	Dec. 31, 2021
Notes to Financial Statements
Property, Plant and Equipment Disclosure [Text Block]	Note 5: The components of premises and equipment as of December 31, 2021 2020 2021 2020 (Dollars in thousands) Land and improvements $ 2,701 $ 2,703 Building and improvements 6,576 6,486 Furniture and equipment 1,372 1,617 Total gross equipment 10,649 10,806 Less accumulated depreciation 5,562 5,593 Premises and equipment, net $ 5,087 $ 5,213

Note 6 - Other Real Estate Owne

Note 6 - Other Real Estate Owned	12 Months Ended
Note 6 - Other Real Estate Owned	Dec. 31, 2021
Notes to Financial Statements
Real Estate Owned [Text Block]	Note 6: At December 31, 2021 December 31, 2020, The following table represents the movement in OREO during the periods presented. At December 31, 2021 2020 (Dollars in thousands) Transfer of loans to OREO $ 172 $ — Sale of OREO 194 — Gross gain realized on transfer to OREO 15 — Gross gain realized on sale of OREO 7 — The recorded investment of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are in process is $60,000 and $111,000, as of December 31, 2021 2020

Note 7 - Deposits

Note 7 - Deposits	12 Months Ended
Note 7 - Deposits	Dec. 31, 2021
Notes to Financial Statements
Deposit Liabilities Disclosures [Text Block]	Note 7: As of December 31, 2021 December 31, Years Ended Amount (Dollars in thousands) 2022 $ 39,927 2023 15,037 2024 9,508 2025 5,537 2026 and beyond 2,865 Total $ 72,874 In the normal course of business, deposit accounts are held by directors and officers of the Bank (related parties). The terms for these accounts, including interest rates, fees, and other attributes, are similar to those prevailing for comparable transactions with other customers and do not December 31, 2021 2020 December 31, 2021.

Note 8 - Other Borrowings

Note 8 - Other Borrowings	12 Months Ended
Note 8 - Other Borrowings	Dec. 31, 2021
Notes to Financial Statements
Federal Home Loan Bank Advances, Disclosure [Text Block]	Note 8: On May 21, 2021, May 21, 2022. May 21, 2021, May 24, 2021. December 31, 2021 2020, first December 31, 2021 2020,

Note 9 - Income Taxes

Note 9 - Income Taxes	12 Months Ended
Note 9 - Income Taxes	Dec. 31, 2021
Notes to Financial Statements
Income Tax Disclosure [Text Block]	Note 9: Income tax expense (benefit) for the years ended December 31, 2021 2020 Year Ended December 31, 2021 2020 (Dollars in thousands) Current (benefit) expense Federal $ 62 $ (262 ) State — 3 Total current benefit 62 (259 ) Deferred benefit (379 ) (233 ) Change in valuation allowance 103 (11 ) Total deferred benefit (276 ) (244 ) Total income tax benefit $ (214 ) $ (503 ) The difference between the income tax expense shown on the statements of income and the amounts computed by applying the statutory federal income tax rate to income before income taxes is primarily due to tax-exempt income, the change in valuation allowance, and the adjustment of deferred taxes for enacted changes in tax laws. The provision for income taxes differs from that computed are as follows: Year Ended December 31, 2021 2020 (Dollars in thousands) Income before income tax expense $ (269 ) $ (615 ) Tax benefit at statutory federal rate of 21% 56 129 State income tax, net of federal effect 51 117 Tax-exempt security and loan income, net of TEFRA adjustments 50 54 BOLI 38 38 Other 19 165 Total income tax expense $ 214 $ 503 Effective tax rate (79.6 )% (81.8 )% The tax effects of existing temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities at December 31, 2021 2020 Year Ended December 31, 2021 2020 (Dollars in thousands) Deferred tax assets Allowance for loan losses $ 222 $ 248 Deferred compensation 432 422 Retirement plans 55 147 Premises held for sale impairment 101 101 Unrealized loss on securities available-for-sale 32 — Federal net operating loss carryforwards 218 — Other 53 39 State net operating loss carryforwards 306 203 Gross deferred tax assets 1,419 1,160 Valuation allowance (306 ) (203 ) Net deferred tax assets 1,113 957 Deferred tax liabilities FHLB stock dividends (101 ) (101 ) Accumulated depreciation (36 ) (46 ) Unrealized gain on securities available-for-sale — (561 ) Other — (142 ) Deferred tax liabilities (137 ) (850 ) Net deferred tax asset $ 976 $ 107 The Bank does not twelve December 31, 2021 2020 not December 31, 2021 2020 2022. There were no uncertain tax positions outstanding as of December 31, 2021 2020 December 31, 2021 2017 2020. 2018 2020. December 31, 2021 twelve

Note 10 - Capital Ratios

Note 10 - Capital Ratios	12 Months Ended
Note 10 - Capital Ratios	Dec. 31, 2021
Notes to Financial Statements
Regulatory Capital Requirements under Banking Regulations [Text Block]	Note 10: 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 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 accounting principles generally accepted in the United States of America, regulatory 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. Quantitative measures established by regulatory reporting standards to ensure capital adequacy require the Bank to maintain minimum amounts and ratios of total and Tier I capital to risk-weighted assets, common equity Tier 1 December 31, 2021, no On November 13, 2019, January 1, 2020. 1 9% two 100 not April 2020, 9% 8% 19 8.5% 2021 9% 2022. first 2020. December 31, 2021, The Bank’s actual capital amounts and ratios as of December 31, 2021 2020 Actual Minimum Required to be Well-Capitalized (1) Amount Ratio Amount Ratio (Dollars in thousands) As of December 31, 2021 Tier 1 capital (to Average Assets) $ 44,262 16.11 % $ 23,349 >8.5% As of December 31, 2020 Tier 1 capital (to Average Assets) $ 44,256 18.41 % $ 21,636 >8% (1) As defined by regulatory agencies. Failure to exceed the leverage ratio thresholds required under CBLR in the future, subject to any applicable grace period, would require the Company to return to the risk-based capital ratio thresholds previously utilized under the fully phased-in Basel III Capital Rules to determine capital adequacy. The Company's principal source of funds for dividend payments is dividends received from the Bank. Banking regulations limit the amount of dividends that the Bank may may two

Note 11 - Benefit Plans

Note 11 - Benefit Plans	12 Months Ended
Note 11 - Benefit Plans	Dec. 31, 2021
Notes to Financial Statements
Defined Benefit Plan [Text Block]	Note 11: During 2021, 2020. The Bank sponsors a noncontributory Profit-Sharing Plan covering all employees who have worked more than 1,000 2021 2020 Management implemented a 401 2007. first 2021 2020.

Note 12 - Commitments and Conti

Note 12 - Commitments and Contingencies	12 Months Ended
Note 12 - Commitments and Contingencies	Dec. 31, 2021
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	Note 12: In the ordinary course of business, the Bank has various commitments and contingent liabilities that are not not Financial Instruments The Bank does not At December 31, 2021 2020 2021 2020 (Dollars in thousands) Unused line of credit $ 4,001 $ 4,372 Commitments to originate loans 219 784 Total commitments $ 4,220 $ 5,156 Concentrations of Credit Risk The Bank generally originates single-family residential loans within its primary lending area which is Waukegan, Illinois and the surrounding area. The Bank’s underwriting policies require such loans to be made at approximately 80% loan-to-value, based upon appraised values, unless private mortgage insurance is obtained, or the loan is guaranteed by the government. These loans are secured by the underlying properties. The Bank maintains its cash in deposit accounts at the Federal Reserve Bank or other institutions, the balances of which may not not Interest Rate Risk The Bank assumes interest rate risk (the risk that general interest rate levels will change) as a result of its normal operations. As a result, fair values of its financial instruments will change when interest rate levels change, and that change may Litigation Due to the nature of its business activities, the Bank is at times subject to legal action which arises in the normal course of business. In the opinion of management, the ultimate resolution of these matters is not

Note 13 - Fair Value Measuremen

Note 13 - Fair Value Measurements	12 Months Ended
Note 13 - Fair Value Measurements	Dec. 31, 2021
Notes to Financial Statements
Fair Value Measurement and Measurement Inputs, Recurring and Nonrecurring [Text Block]	Note 13: Fair value is the price that would be received to sell an asset or paid to transfer a 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 may Level 1 Quoted prices in active markets for identical assets or liabilities Level 2 Observable inputs other than Level 1 not Level 3 Unobservable inputs supported by little or no An asset’s fair value measurement level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Following is a description of the valuation methodologies used for assets measured at fair value. There have been no December 31, 2021 2020 Available-for-Sale Securities (Recurring) Where quoted market prices are available in an active market, securities such as U.S. Treasuries, would be classified within Level 1 not not 2 1 2 not 3 Impaired Loans (Nonrecurring) Impaired loans are recorded at fair value on a nonrecurring basis. The fair value of loans is generally based on recent real estate appraisals. These appraisals may 3 may 3 not The following table presents the Bank’s assets that are measured at fair value on a recurring basis classified under the appropriate level of the fair value hierarchy as of December 31, 2021 2020 Fair Value Measurements Using Fair Value Level 1 Level 2 Level 3 (Dollars in thousands) December 31, 2021 Securities Available-for-sale U.S. government agency obligations $ 10,053 — 10,053 $ — Municipal obligations 18,000 — 18,000 — Mortgage-backed residential obligations 42,148 — 42,148 — Collateralized mortgage obligations 30,749 — 30,749 — Total $ 100,950 — 100,950 $ — December 31, 2020 Securities Available-for-sale U.S. government agency obligations $ 7,147 — 7,147 $ — Municipal obligations 10,980 — 10,980 — Mortgage-backed residential obligations 43,094 — 43,094 — Collateralized mortgage obligations 20,399 — 20,399 — Total $ 81,620 — 81,620 $ — The Bank may 3 December 31, 2021 2020 Fair Value Measurements Using Fair Value Level 1 Level 2 Level 3 Gain/(Loss) (Dollars in thousands) December 31, 2021 Impaired loans $ 663 — — 663 $ — December 31, 2020 Impaired loans $ 925 — — 925 $ — The numerical range of unobservable inputs for the valuation assumptions used in calculating the amounts disclosed above is not

Note 14 - Fair Value of Financi

Note 14 - Fair Value of Financial Instruments	12 Months Ended
Note 14 - Fair Value of Financial Instruments	Dec. 31, 2021
Notes to Financial Statements
Fair Value Disclosures [Text Block]	Note 14: Financial instruments are classified within the fair value hierarchy using the methodologies described in Note 13 not may not Certain financial instruments generally expose the Company to limited credit risk and have no The carrying amounts and estimated fair values by fair value hierarchy of certain financial instruments are as follows: Carrying Estimated Amount Level 1 Level 2 Level 3 Fair Value (Dollars in thousands) December 31, 2021 Financial assets: Loans, net $ 96,534 $ — $ 96,391 $ — $ 96,391 Loans held for sale 104 — 112 — 112 Financial liabilities: Interest-bearing deposits $ 186,531 $ — $ 181,564 $ — $ 181,564 December 31, 2020 Financial assets: Loans, net $ 98,455 $ — $ 102,034 $ — $ 102,034 Loans held for sale 1,972 — 1,972 — 1,972 Financial liabilities: Interest-bearing deposits $ 176,670 $ — $ 177,280 $ — $ 177,280

Note 15 - Condensed Parent Only

Note 15 - Condensed Parent Only Financial Information	12 Months Ended
Note 15 - Condensed Parent Only Financial Information	Dec. 31, 2021
Notes to Financial Statements
Condensed Financial Information of Parent Company Only Disclosure [Text Block]	Note 15: The Parent Company’s condensed balance sheet and related condensed statements of operations and cash flows are as follows. NORTH SHORE MHC Condensed Balance Sheets Year ended December 31, 2021 2020 (Dollars in thousands) Assets: Cash $ 230 $ 993 Investment in subsidiary 44,200 45,687 Other assets 753 48 Total assets $ 45,183 $ 46,728 Liabilities: Accrued expense and other liabilities $ — $ 3 Total liabilities — 3 Members’ equity: Members’ equity 45,183 46,725 Total members’ equity 45,183 46,725 Total liabilities and members’ equity $ 45,183 $ 46,728 NORTH SHORE MHC Condensed Statements of Operations Year ended December 31, 2021 2020 (Dollars in thousands) Income: Interest income $ 1 $ 1 Total income 1 1 Expense: Noninterest expense $ 19 $ 229 Total expense 19 229 Losses before income tax benefit and equity in undistributed earnings of subsidiary $ (18 ) $ (228 ) Income tax benefit 38 (56 ) Losses before equity in undistributed earnings of subsidiary $ (56 ) $ (172 ) Equity in undistributed earnings of subsidiary 1 60 Net (losses) income $ (55 ) $ (112 ) NORTH SHORE MHC Condensed Statements of Cash Flows Year ended December 31, 2021 2020 (Dollars in thousands) Cash flows from operating activities: Net (losses) income $ (55 ) $ (112 ) Adjustments to reconcile net (losses) income to net cash used in operating activities: Decrease (increase) in other assets (704 ) 80 Increase (decrease) in accrued expenses and other liabilities (3 ) 3 Equity in undistributed earnings of subsidiary (1 ) (60 ) Net cash used in operating activities (763 ) (89 ) Cash flows from financing activities: Dividends received from subsidiary — 950 Net cash provided by financing activities — 950 Net change in cash (763 ) 861 Cash at beginning of period 993 132 Cash at end of period $ 230 $ 993

Note 16 - Changes in Accounting

Note 16 - Changes in Accounting Principles	12 Months Ended
Note 16 - Changes in Accounting Principles	Dec. 31, 2021
Notes to Financial Statements
Accounting Standards Update and Change in Accounting Principle [Text Block]	Note 16: Accounting for Financial Instruments Credit Losses The FASB issued Accounting Standards Update ("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 multiple 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 2016 13 January 2023

Note 17 - Subsequent Events

Note 17 - Subsequent Events	12 Months Ended
Note 17 - Subsequent Events	Dec. 31, 2021
Notes to Financial Statements
Subsequent Events [Text Block]	Note 17: Management evaluated subsequent events through March 22, 2022, 1, not

Significant Accounting Policies

Significant Accounting Policies (Policies)	12 Months Ended
Significant Accounting Policies (Policies)	Dec. 31, 2021
Accounting Policies [Abstract]
Nature of Operations [Policy Text Block]	Nature of Operations NSTS Bancorp, Inc. was formed to serve as the stock holding company for North Shore Trust and Savings (the “Bank”) in connection with the conversion of North Shore Trust and Savings, NSTS Financial Corporation and North Shore MHC, into the stock form of organization, which was completed on January 18, 2022. December 31, 2021 not not December 31, 2021, January 18, 2022, 10 NSTS Bancorp, Inc. completed its stock offering on January 18, 2022. January 19, 2022 These financial statements include the accounts of North Shore MHC, a federal mutual holding company; its wholly owned subsidiary NSTS Financial Corporation, a stock holding company; and North Shore Trust and Savings (the “Bank”), a federal stock savings bank. The Bank operates primarily in the northern suburbs of Chicago, Illinois. The Bank offers a variety of financial services to customers in the surrounding community. Financial services consist primarily of 1 4 no one All significant intercompany balances and transactions have been eliminated in consolidation. Certain amounts in prior year financial statements have been reclassified to conform to the 2021
Use of Estimates, Policy [Policy Text Block]	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 revenue and expenses during the reporting period. Actual results may The determination of the adequacy of the allowance for loan losses is based on estimates that are particularly susceptible to significant changes in the economic environment and market conditions. In connection with the determination of the estimated losses on loans, management obtains independent appraisals for significant collateral. The Bank’s loans are generally secured by specific items of collateral including real property, consumer assets, and business assets. Although the Bank has a diversified loan portfolio, a substantial portion of its debtors’ ability to honor their contracts is dependent on local economic conditions. While management uses available information to recognize losses on loans, further reductions in the carrying amounts of loans may may may Additional material estimates that are particularly susceptible to significant change in the near term include the determination of the valuation allowance on deferred tax assets and the valuation of investment securities.
Comprehensive Income, Policy [Policy Text Block]	Comprehensive Income Comprehensive income includes net income (losses) and other changes in net worth which bypass the statement of operations. For all periods presented, other comprehensive income includes only one
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash and Cash Equivalents For purposes of reporting cash flows, cash and cash equivalents includes cash on hand and amounts due from banks, including cash items in process of clearing.
Time Deposits With Other Financial Institutions [Policy Text Block]	Time Deposits with Other Financial Institutions Time deposits with other financial institutions are carried at cost and generally mature within the next two
Investment, Policy [Policy Text Block]	Investment Securities Securities are classified as available-for-sale and recorded at fair value, with unrealized gains and losses excluded from earnings and reported in other comprehensive income (loss). Discounts are accreted into interest income over the estimated life of the related security and premiums are amortized against income over the earlier of the call date or weighted average life of the related security using the level yield method. Gains and losses on the sale of securities are recorded on the trade date and are determined using the specific identification method. Securities available-for-sale are securities that are intended to be held for indefinite periods of time, but which may not may may The Bank conducts a periodic review of available-for-sale securities with declines in fair value below their cost to evaluate if the impairment is other than temporary. In estimating other-than-temporary impairment, management considers ( 1 2 3
Federal Home Loan Bank Stock, Policy [Policy Text Block]	Federal Home Loan Bank Stock The Bank, as a member of the Federal Home Loan Bank (FHLB) system, is required to maintain an investment in capital stock of the FHLB. Based on redemption provisions of the FHLB, the stock has no December 31, 2021 2020
Financing Receivable, Held-for-sale [Policy Text Block]	Loans Held for Sale Mortgage loans originated and intended for sale in the secondary market are carried at the lower of cost or market value, as determined by outstanding commitments from investors. Net unrealized losses, if any, are recorded as a valuation allowance and charged to earnings. Mortgage loans held for sale are generally sold with servicing rights released. Gains or losses are recognized through earnings.
Financing Receivable, Held-for-investment [Policy Text Block]	Loans The Bank’s loan portfolio includes segments for mortgage loans and consumer loans. Mortgage loans include classes for 1 4 Loans that management has the intent and ability to hold for the foreseeable future or until maturity or pay-off generally are reported at their outstanding unpaid principal balances adjusted for charge offs, the allowance for loan losses, and any deferred fees or costs on originated loans. Interest income is accrued on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, are deferred and recognized as an adjustment to the related loan yield using the interest method, adjusted for prepayments. The accrual of interest on all loans is discontinued at the time the loan is 90 not
Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block]	Allowance for Loan Losses The allowance for loan losses (the “allowance”) is established as losses are estimated to have occurred through a provision for loan losses charged to earnings. Loan losses are charged against the allowance when management believes the uncollectibility of a loan balance is confirmed. Subsequent recoveries, if any, are credited to the allowance. The allowance for loan losses is evaluated on a regular basis by management. This evaluation is inherently subjective as it requires estimates that are susceptible to significant revision as more information becomes available. The allowance consists of general and allocated components, as further described below. General Component The general component of the allowance for loan losses is based on historical loss experience adjusted for qualitative factors stratified by the following loan segments: first The qualitative factors are determined based on the various risk characteristics of each loan segment. Risk characteristics relevant to each portfolio segment are as follows: Mortgage Loans 1 4 first not not Although terms for commercial real estate and multi-family residential loans vary, our underwriting standards generally allow for terms not not The Wall Street Journal Commercial real estate and multi-family residential lending involve a greater degree of risk than one four Consumer Loans Loans in this segment are generally to individuals and are supported by non-real estate collateral, such as deposit accounts and personal property. Unsecured loans are also included in this segment. Repayment is dependent on the credit quality of the individual borrower or borrowers. Allocated Component The allocated component relates to loans that are classified as impaired. Based on internal ratings, loans are evaluated for impairment on a loan-by-loan basis. Impairment is measured by either the present value of expected future cash flows discounted at the loan’s effective interest rate or the fair value of the collateral if the loan is collateral dependent. An allowance is established when the discounted cash flows (or collateral value) of the impaired loan is lower than the carrying value of that loan. 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 status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not The Bank periodically may
Property, Plant and Equipment, Policy [Policy Text Block]	Premises and Equipment Land is stated at cost. Property, improvements, and equipment are stated at cost less accumulated depreciation. Depreciation is determined under the straight-line method over the following estimated useful lives of assets: Years Land improvements 3 - 10 Office building and improvements 10 - 40 Furniture and equipment 3 - 10
Income Tax, Policy [Policy Text Block]	Income Taxes Deferred taxes are recognized using the asset/liability method. Deferred tax assets are recognized for deductible temporary differences, operating loss and tax credit carryforwards; deferred tax liabilities are recognized for taxable temporary differences. Temporary differences are the differences between the financial statement amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not not When tax returns are filed, it is highly certain that some positions taken would be sustained upon examination by the taxing authorities, while others are subject to uncertainty about the merits of the position taken or the amount of the position that would be ultimately sustained. The benefit of a tax position is recognized in the financial statements in the period during which, based on all available evidence, management believes it is more likely than not not not 50% Interest and penalties associated with unrecognized tax benefits, if any, are classified as additional income taxes in the statement of operations. Bank management believes that the Bank maintains no uncertain tax positions for tax reporting purposes and accordingly, no The Bank is subject to U.S. federal income tax as well as income tax of the States of Illinois and Wisconsin.
Real Estate Owned, Valuation Allowance, Policy [Policy Text Block]	Other Real Estate Owned Property acquired in satisfaction of debt or through foreclosure is carried at the lower of cost or market value less estimated costs to sell. At foreclosure, if the fair value of the property acquired is less than the recorded investment in the related loan, a reduction in the carrying amount of the loan is recognized with a charge to the allowance for loan losses. The cost of carrying the assets subsequent to foreclosure and any decrease in the market value occurring after that date are charged to operating expenses as incurred.
Bank-owned Life Insurance, Policy [Policy Text Block]	Bank-owned Life Insurance The Bank purchased life insurance policies on certain key executives. Bank-owned life insurance is recorded at the amount estimated to be realized under the insurance contract at the balance sheet date, which is the cash surrender value adjusted for other charges or amounts due which are probable at settlement.
Service Charges On Deposits [Policy Text Block]	Service Charges on Deposits Service charges on deposits represent general service fees for monthly account maintenance and activity or transaction-based fees and consist of transaction-based revenue, time-based revenue (service period), item-based revenue, or some other individual attribute-based revenue. Revenue is recognized when the Bank’s performance obligation is completed, which is generally monthly for account maintenance services or when a transaction has been completed (such as a wire transfer). Payment for such performance obligations are generally received at the time performance obligations are satisfied.
Dividends Restrictions [Policy Text Block]	Dividend Restrictions Banking regulations require maintaining certain capital levels and may
Transfers and Servicing of Financial Assets, Transfers of Financial Assets, Policy [Policy Text Block]	Transfers of Financial Assets Transfers of financial assets are accounted for as sales when control over the assets has been relinquished. Control over transferred assets is deemed to be surrendered when the assets have been isolated from the Bank, the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets, and the Bank does not

Note 1 - Summary of Significa_2

Note 1 - Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2021
Notes Tables
Property, Plant and Equipment Useful Life [Table Text Block]	Years Land improvements 3 - 10 Office building and improvements 10 - 40 Furniture and equipment 3 - 10

Note 2 - Securities (Tables)

Note 2 - Securities (Tables)	12 Months Ended
Note 2 - Securities (Tables)	Dec. 31, 2021
Notes Tables
Debt Securities, Available-for-sale [Table Text Block]	December 31, 2021 U.S. government agency obligations Municipal obligations Mortgage-backed residential obligations Collateralized mortgage obligations Total available-for-sale (Dollars in thousands) 1 year or less $ — $ 1,631 $ 356 $ 1,064 $ 3,051 1 to 5 years 5,587 3,941 29,375 16,097 55,000 5 to 10 years 4,466 2,244 12,417 11,976 31,103 After 10 years $ — 10,184 — 1,612 11,796 Fair value $ 10,053 $ 18,000 $ 42,148 $ 30,749 $ 100,950 Gross unrealized gains 73 423 259 279 1,034 Gross unrealized losses (78 ) (14 ) (612 ) (443 ) (1,147 ) Amortized cost $ 10,058 $ 17,591 $ 42,501 $ 30,913 $ 101,063 December 31, 2020 U.S. government agency obligations Municipal obligations Mortgage-backed residential obligations Collateralized mortgage obligations Total available-for-sale (Dollars in thousands) 1 year or less $ 1,000 $ 769 $ 1,443 $ 382 $ 3,594 1 to 5 years 4,863 3,726 34,485 14,452 $ 57,526 5 to 10 years 1,284 4,353 7,166 5,565 $ 18,368 After 10 years — 2,132 — — $ 2,132 Fair value $ 7,147 $ 10,980 $ 43,094 $ 20,399 $ 81,620 Gross unrealized gains 153 518 883 534 $ 2,088 Gross unrealized losses (17 ) (18 ) (21 ) (66 ) $ (122 ) Amortized cost $ 7,011 $ 10,480 $ 42,232 $ 19,931 $ 79,654
Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Table Text Block]	Less than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized December 31, 2021 Value Losses Value Losses Value Losses (Dollars in thousands) U.S. government agency obligations $ 4,020 $ 62 $ 1,105 $ 16 $ 5,125 $ 78 Municipal obligations 2,399 8 247 6 2,646 14 Mortgage-backed residential obligations 26,540 535 2,781 77 29,321 612 Collateralized mortgage obligations 16,715 338 4,386 105 21,101 443 Total $ 49,674 $ 943 $ 8,519 $ 204 $ 58,193 $ 1,147 December 31, 2020 U.S. government agency obligations $ 1,284 $ 17 $ - $ — $ 1,284 $ 17 Municipal obligations — — 238 18 238 18 Mortgage-backed residential obligations 5,265 16 1,170 5 6,435 21 Collateralized mortgage obligations 8,694 66 241 — 8,935 66 Total $ 15,243 $ 99 $ 1,649 $ 23 $ 16,892 $ 122
Schedule of Realized Gain (Loss) [Table Text Block]	At December 31, 2021 2020 (Dollars in thousands) Sales of securities available for sale $ 6,769 $ 12,112 Gross gain realized on the sale of securities available for sale 131 114 Gross loss realized on the sale of securities available for sale — (55 )

Note 3 - Loans (Tables)

Note 3 - Loans (Tables)	12 Months Ended
Note 3 - Loans (Tables)	Dec. 31, 2021
Notes Tables
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]	2021 2020 (Dollars in thousands) First mortgage loans 1-4 family residential $ 88,028 $ 87,198 Multi-family 3,497 5,736 Commercial 4,604 5,340 Total first mortgage loans 96,129 98,274 Consumer loans 372 385 Total loans 96,501 98,659 Net deferred loan costs 812 666 Allowance for loan losses (779 ) (870 ) Total loans, net $ 96,534 $ 98,455

Note 4 - Allowance for Loan L_2

Note 4 - Allowance for Loan Losses (Tables)	12 Months Ended
Note 4 - Allowance for Loan Losses (Tables)	Dec. 31, 2021
Notes Tables
Financing Receivable, Allowance for Credit Loss [Table Text Block]	December 31, 2021 1-4 family residential Multi-family Commercial Consumer Total (Dollars in thousands) Year ended: Beginning balance $ 798 29 38 5 $ 870 Charge-offs — — — (99 ) (99 ) Recoveries 31 — — — 31 Net recoveries (charge-offs) 31 — — (99 ) (68 ) Provision for loan losses (154 ) 40 (13 ) 104 (23 ) Ending balance $ 675 69 25 10 $ 779 December 31, 2020 1-4 family residential Multi-family Commercial Consumer Total (Dollars in thousands) Year ended: Beginning balance $ 362 10 9 8 $ 389 Charge-offs — — — — — Recoveries 17 — — — 17 Net recoveries (charge-offs) 17 — — — 17 Provision for loan losses 419 19 29 (3 ) 464 Ending balance $ 798 29 38 5 $ 870 Collectively evaluated Individually evaluated Total Allowance for loan losses Recorded investment in loans Allowance for loan losses Recorded investment in loans Allowance for loan losses Recorded investment in loans (Dollars in thousands) December 31, 2021 1-4 family residential $ 557 $ 86,892 $ 118 $ 1,136 $ 675 $ 88,028 Multi-family 69 3,497 — — 69 3,497 Commercial 25 4,604 — — 25 4,604 Consumer 10 372 — — 10 372 Total $ 661 $ 95,365 $ 118 $ 1,136 $ 779 $ 96,501 December 31, 2020 1-4 family residential $ 648 $ 84,775 $ 150 $ 2,423 $ 798 $ 87,198 Multi-family 29 5,736 — — 29 5,736 Commercial 38 5,340 — — 38 5,340 Consumer 5 286 — 99 5 385 Total $ 720 $ 96,137 $ 150 $ 2,522 $ 870 $ 98,659
Financing Receivable Credit Quality Indicators [Table Text Block]	Special Pass Mention Substandard Doubtful Total loans (Dollars in thousands) December 31, 2021 1-4 family residential $ 87,881 $ 45 $ 102 $ — $ 88,028 Multi-family 3,497 — — — 3,497 Commercial 4,604 — — — 4,604 Consumer 372 — — — 372 Total $ 96,354 $ 45 $ 102 $ — $ 96,501 December 31, 2020 1-4 family residential $ 86,501 $ 417 $ 280 $ — $ 87,198 Multi-family 5,736 — — — 5,736 Commercial 5,340 — — — 5,340 Consumer 286 99 — — 385 Total $ 97,863 $ 516 $ 280 $ — $ 98,659
Financing Receivable, Past Due [Table Text Block]	31-89 Days Past Due and Accruing Greater than 90 Days Past Due and Accruing Non-Accrual Total Past Due and Non-Accrual Current Total Loan Balance (Dollars in thousands) December 31, 2021 1-4 family residential $ — $ 41 $ 102 $ 143 $ 87,885 $ 88,028 Multi-family — — — — 3,497 3,497 Commercial — — — — 4,604 4,604 Consumer — — — — 372 372 Total $ — $ 41 $ 102 $ 143 $ 96,358 $ 96,501 December 31, 2020 1-4 family residential $ — $ 75 $ 280 $ 355 $ 86,843 $ 87,198 Multi-family — — — — 5,736 5,736 Commercial — — — — 5,340 5,340 Consumer 99 — — 99 286 385 Total $ 99 $ 75 $ 280 $ 454 $ 98,205 $ 98,659
Impaired Financing Receivables [Table Text Block]	Recorded investment Unpaid principal balance Related allowance Average recorded investment Interest income recognized (Dollars in thousands) December 31, 2021 With no related allowance recorded 1-4 family residential $ 355 $ 595 $ — $ 348 $ 26 Multi-family — — — — — Commercial — — — — — Consumer — — — — — Total $ 355 $ 595 $ — $ 348 $ 26 With a related allowance recorded 1-4 family residential $ 781 $ 797 $ 118 $ 797 $ 35 Multi-family — — — — — Commercial — — — — — Consumer — — — — — Total $ 781 $ 797 $ 118 $ 797 $ 35 Total individually assessed as of December 31, 2021 $ 1,136 $ 1,392 $ 118 $ 1,145 $ 61 December 31, 2020 With no related allowance recorded 1-4 family residential $ 1,348 $ 1,676 $ — $ 1,382 $ 73 Multi-family — — — — — Commercial — — — — — Consumer 99 99 — 89 6 Total $ 1,447 $ 1,775 $ — $ 1,471 $ 79 With a related allowance recorded 1-4 family residential $ 1,075 $ 1,120 $ 150 $ 1,104 $ 51 Multi-family — — — — — Commercial — — — — — Consumer — — — — — Total $ 1,075 $ 1,120 $ 150 $ 1,104 $ 51 Total individually assessed as of December 31, 2020 $ 2,522 $ 2,895 $ 150 $ 2,575 $ 130

Note 5 - Premises and Equipme_2

Note 5 - Premises and Equipment (Tables)	12 Months Ended
Note 5 - Premises and Equipment (Tables)	Dec. 31, 2021
Notes Tables
Property, Plant and Equipment [Table Text Block]	2021 2020 (Dollars in thousands) Land and improvements $ 2,701 $ 2,703 Building and improvements 6,576 6,486 Furniture and equipment 1,372 1,617 Total gross equipment 10,649 10,806 Less accumulated depreciation 5,562 5,593 Premises and equipment, net $ 5,087 $ 5,213

Note 6 - Other Real Estate Ow_2

Note 6 - Other Real Estate Owned (Tables)	12 Months Ended
Note 6 - Other Real Estate Owned (Tables)	Dec. 31, 2021
Notes Tables
Other Real Estate, Roll Forward [Table Text Block]	At December 31, 2021 2020 (Dollars in thousands) Transfer of loans to OREO $ 172 $ — Sale of OREO 194 — Gross gain realized on transfer to OREO 15 — Gross gain realized on sale of OREO 7 —

Note 7 - Deposits (Tables)

Note 7 - Deposits (Tables)	12 Months Ended
Note 7 - Deposits (Tables)	Dec. 31, 2021
Notes Tables
Time Deposit Maturities [Table Text Block]	Years Ended Amount (Dollars in thousands) 2022 $ 39,927 2023 15,037 2024 9,508 2025 5,537 2026 and beyond 2,865 Total $ 72,874

Note 9 - Income Taxes (Tables)

Note 9 - Income Taxes (Tables)	12 Months Ended
Note 9 - Income Taxes (Tables)	Dec. 31, 2021
Notes Tables
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	Year Ended December 31, 2021 2020 (Dollars in thousands) Current (benefit) expense Federal $ 62 $ (262 ) State — 3 Total current benefit 62 (259 ) Deferred benefit (379 ) (233 ) Change in valuation allowance 103 (11 ) Total deferred benefit (276 ) (244 ) Total income tax benefit $ (214 ) $ (503 )
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	Year Ended December 31, 2021 2020 (Dollars in thousands) Income before income tax expense $ (269 ) $ (615 ) Tax benefit at statutory federal rate of 21% 56 129 State income tax, net of federal effect 51 117 Tax-exempt security and loan income, net of TEFRA adjustments 50 54 BOLI 38 38 Other 19 165 Total income tax expense $ 214 $ 503 Effective tax rate (79.6 )% (81.8 )%
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	Year Ended December 31, 2021 2020 (Dollars in thousands) Deferred tax assets Allowance for loan losses $ 222 $ 248 Deferred compensation 432 422 Retirement plans 55 147 Premises held for sale impairment 101 101 Unrealized loss on securities available-for-sale 32 — Federal net operating loss carryforwards 218 — Other 53 39 State net operating loss carryforwards 306 203 Gross deferred tax assets 1,419 1,160 Valuation allowance (306 ) (203 ) Net deferred tax assets 1,113 957 Deferred tax liabilities FHLB stock dividends (101 ) (101 ) Accumulated depreciation (36 ) (46 ) Unrealized gain on securities available-for-sale — (561 ) Other — (142 ) Deferred tax liabilities (137 ) (850 ) Net deferred tax asset $ 976 $ 107

Note 10 - Capital Ratios (Table

Note 10 - Capital Ratios (Tables)	12 Months Ended
Note 10 - Capital Ratios (Tables)	Dec. 31, 2021
Notes Tables
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]	Actual Minimum Required to be Well-Capitalized (1) Amount Ratio Amount Ratio (Dollars in thousands) As of December 31, 2021 Tier 1 capital (to Average Assets) $ 44,262 16.11 % $ 23,349 >8.5% As of December 31, 2020 Tier 1 capital (to Average Assets) $ 44,256 18.41 % $ 21,636 >8% (1) As defined by regulatory agencies. Failure to exceed the leverage ratio thresholds required under CBLR in the future, subject to any applicable grace period, would require the Company to return to the risk-based capital ratio thresholds previously utilized under the fully phased-in Basel III Capital Rules to determine capital adequacy.

Note 12 - Commitments and Con_2

Note 12 - Commitments and Contingencies (Tables)	12 Months Ended
Note 12 - Commitments and Contingencies (Tables)	Dec. 31, 2021
Notes Tables
Other Commitments [Table Text Block]	2021 2020 (Dollars in thousands) Unused line of credit $ 4,001 $ 4,372 Commitments to originate loans 219 784 Total commitments $ 4,220 $ 5,156

Note 13 - Fair Value Measurem_2

Note 13 - Fair Value Measurements (Tables)	12 Months Ended
Note 13 - Fair Value Measurements (Tables)	Dec. 31, 2021
Notes Tables
Fair Value, Assets Measured on Recurring Basis [Table Text Block]	Fair Value Measurements Using Fair Value Level 1 Level 2 Level 3 (Dollars in thousands) December 31, 2021 Securities Available-for-sale U.S. government agency obligations $ 10,053 — 10,053 $ — Municipal obligations 18,000 — 18,000 — Mortgage-backed residential obligations 42,148 — 42,148 — Collateralized mortgage obligations 30,749 — 30,749 — Total $ 100,950 — 100,950 $ — December 31, 2020 Securities Available-for-sale U.S. government agency obligations $ 7,147 — 7,147 $ — Municipal obligations 10,980 — 10,980 — Mortgage-backed residential obligations 43,094 — 43,094 — Collateralized mortgage obligations 20,399 — 20,399 — Total $ 81,620 — 81,620 $ —
Fair Value Measurements, Nonrecurring [Table Text Block]	Fair Value Measurements Using Fair Value Level 1 Level 2 Level 3 Gain/(Loss) (Dollars in thousands) December 31, 2021 Impaired loans $ 663 — — 663 $ — December 31, 2020 Impaired loans $ 925 — — 925 $ —

Note 14 - Fair Value of Finan_2

Note 14 - Fair Value of Financial Instruments (Tables)	12 Months Ended
Note 14 - Fair Value of Financial Instruments (Tables)	Dec. 31, 2021
Notes Tables
Fair Value, by Balance Sheet Grouping [Table Text Block]	Carrying Estimated Amount Level 1 Level 2 Level 3 Fair Value (Dollars in thousands) December 31, 2021 Financial assets: Loans, net $ 96,534 $ — $ 96,391 $ — $ 96,391 Loans held for sale 104 — 112 — 112 Financial liabilities: Interest-bearing deposits $ 186,531 $ — $ 181,564 $ — $ 181,564 December 31, 2020 Financial assets: Loans, net $ 98,455 $ — $ 102,034 $ — $ 102,034 Loans held for sale 1,972 — 1,972 — 1,972 Financial liabilities: Interest-bearing deposits $ 176,670 $ — $ 177,280 $ — $ 177,280

Note 15 - Condensed Parent On_2

Note 15 - Condensed Parent Only Financial Information (Tables)	12 Months Ended
	Dec. 31, 2021
Notes Tables
Condensed Balance Sheet [Table Text Block]	Year ended December 31, 2021 2020 (Dollars in thousands) Assets: Cash $ 230 $ 993 Investment in subsidiary 44,200 45,687 Other assets 753 48 Total assets $ 45,183 $ 46,728 Liabilities: Accrued expense and other liabilities $ — $ 3 Total liabilities — 3 Members’ equity: Members’ equity 45,183 46,725 Total members’ equity 45,183 46,725 Total liabilities and members’ equity $ 45,183 $ 46,728
Condensed Income Statement [Table Text Block]	Year ended December 31, 2021 2020 (Dollars in thousands) Income: Interest income $ 1 $ 1 Total income 1 1 Expense: Noninterest expense $ 19 $ 229 Total expense 19 229 Losses before income tax benefit and equity in undistributed earnings of subsidiary $ (18 ) $ (228 ) Income tax benefit 38 (56 ) Losses before equity in undistributed earnings of subsidiary $ (56 ) $ (172 ) Equity in undistributed earnings of subsidiary 1 60 Net (losses) income $ (55 ) $ (112 )
Condensed Cash Flow Statement [Table Text Block]	Year ended December 31, 2021 2020 (Dollars in thousands) Cash flows from operating activities: Net (losses) income $ (55 ) $ (112 ) Adjustments to reconcile net (losses) income to net cash used in operating activities: Decrease (increase) in other assets (704 ) 80 Increase (decrease) in accrued expenses and other liabilities (3 ) 3 Equity in undistributed earnings of subsidiary (1 ) (60 ) Net cash used in operating activities (763 ) (89 ) Cash flows from financing activities: Dividends received from subsidiary — 950 Net cash provided by financing activities — 950 Net change in cash (763 ) 861 Cash at beginning of period 993 132 Cash at end of period $ 230 $ 993

Note 1 - Summary of Significa_3

Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($)	Jan. 18, 2022	Dec. 31, 2021	Dec. 31, 2020
Federal Home Loan Bank Stock		$ 550,000	$ 512,000
Unrecognized Tax Benefits, Ending Balance		$ 0	$ 0
First Mortgage Loans [Member] \| One To Four Family Residential [Member]
Financing Receivable, Minimum Percentage of Loan-to-value Ratio, Requires Mortgage Insurance		80.00%
First Mortgage Loans [Member] \| Multifamily and Commercial Real Estate [Member]
Financing Receivable, Maximum Term (Year)		30 years
Financing Receivable, Maximum Loan-to-value Ratio		75.00%
Stock Offering [Member]
Proceeds from Future Issuance of Stock, Held in Deposit		$ 87,300,000
Subscription Offering [Member] \| Subsequent Event [Member]
Stock Issued During Period, Shares, New Issues (in shares)	5,290,000
Shares Issued, Price Per Share (in dollars per share)	$ 10
Proceeds from Issuance of Common Stock	$ 53,000,000
Subscription Offering [Member] \| Subsequent Event [Member] \| NSTS Charitable Foundation [Member]
Payments of Charitable Contributions	$ 150,000
Subscription Offering [Member] \| Subsequent Event [Member] \| NSTS Charitable Foundation [Member] \| Contribution of Nonmonetary Assets to Charitable Organization [Member]
Stock Issued During Period, Shares, New Issues (in shares)	107,959

Note 1 - Summary of Significa_4

Note 1 - Summary of Significant Accounting Policies - Premises and Equipment (Details)	12 Months Ended
	Dec. 31, 2021
Land Improvements [Member] \| Minimum [Member]
Property, plant and equipment, useful life (Year)	3 years
Land Improvements [Member] \| Maximum [Member]
Property, plant and equipment, useful life (Year)	10 years
Building and Building Improvements [Member] \| Minimum [Member]
Property, plant and equipment, useful life (Year)	10 years
Building and Building Improvements [Member] \| Maximum [Member]
Property, plant and equipment, useful life (Year)	40 years
Furniture and Fixtures [Member] \| Minimum [Member]
Property, plant and equipment, useful life (Year)	3 years
Furniture and Fixtures [Member] \| Maximum [Member]
Property, plant and equipment, useful life (Year)	10 years

Note 2 - Securities (Details Te

Note 2 - Securities (Details Textual) Pure in Thousands, $ in Thousands	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)
Debt Securities, Available-for-sale, Total	$ 100,950	$ 81,620
Other Than U.S. Government and Agencies [Member]
Number of Securities of One Issuer Greater Than Ten Percent of Members' Equity	0	0
Asset Pledged as Collateral [Member]
Debt Securities, Available-for-sale, Total	$ 0	$ 0

Note 2 - Securities - Amortized

Note 2 - Securities - Amortized Cost and Estimated Fair Value of Debt Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
1 year or less	$ 3,051	$ 3,594
1 to 5 years	55,000	57,526
5 to 10 years	31,103	18,368
After 10 years	11,796	2,132
Fair value	100,950	81,620
Gross unrealized gains	1,034	2,088
Gross unrealized losses	(1,147)	(122)
Amortized cost	101,063	79,654
US Government Agencies Debt Securities [Member]
1 year or less	0	1,000
1 to 5 years	5,587	4,863
5 to 10 years	4,466	1,284
After 10 years	0	0
Fair value	10,053	7,147
Gross unrealized gains	73	153
Gross unrealized losses	(78)	(17)
Amortized cost	10,058	7,011
Municipal Bonds [Member]
1 year or less	1,631	769
1 to 5 years	3,941	3,726
5 to 10 years	2,244	4,353
After 10 years	10,184	2,132
Fair value	18,000	10,980
Gross unrealized gains	423	518
Gross unrealized losses	(14)	(18)
Amortized cost	17,591	10,480
Residential Mortgage Backed Securities [Member]
1 year or less	356	1,443
1 to 5 years	29,375	34,485
5 to 10 years	12,417	7,166
After 10 years	0	0
Fair value	42,148	43,094
Gross unrealized gains	259	883
Gross unrealized losses	(612)	(21)
Amortized cost	42,501	42,232
Commercial Mortgage Backed Securities [Member]
1 year or less	1,064	382
1 to 5 years	16,097	14,452
5 to 10 years	11,976	5,565
After 10 years	1,612	0
Fair value	30,749	20,399
Gross unrealized gains	279	534
Gross unrealized losses	(443)	(66)
Amortized cost	$ 30,913	$ 19,931

Note 2 - Securities - Gross Unr

Note 2 - Securities - Gross Unrealized Losses (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Less than 12 Months, Fair Value	$ 49,674	$ 15,243
Less than 12 Months, Unrealized Losses	943	99
12 Months or Longer, Fair Value	8,519	1,649
12 Months or Longer, Unrealized Losses	204	23
Total, Fair Value	58,193	16,892
Total, Unrealized Losses	1,147	122
US Government Agencies Debt Securities [Member]
Less than 12 Months, Fair Value	4,020	1,284
Less than 12 Months, Unrealized Losses	62	17
12 Months or Longer, Fair Value	1,105	0
12 Months or Longer, Unrealized Losses	16	0
Total, Fair Value	5,125	1,284
Total, Unrealized Losses	78	17
Municipal Bonds [Member]
Less than 12 Months, Fair Value	2,399	0
Less than 12 Months, Unrealized Losses	8	0
12 Months or Longer, Fair Value	247	238
12 Months or Longer, Unrealized Losses	6	18
Total, Fair Value	2,646	238
Total, Unrealized Losses	14	18
Residential Mortgage Backed Securities [Member]
Less than 12 Months, Fair Value	26,540	5,265
Less than 12 Months, Unrealized Losses	535	16
12 Months or Longer, Fair Value	2,781	1,170
12 Months or Longer, Unrealized Losses	77	5
Total, Fair Value	29,321	6,435
Total, Unrealized Losses	612	21
Collateralized Mortgage Backed Securities [Member]
Less than 12 Months, Fair Value	16,715	8,694
Less than 12 Months, Unrealized Losses	338	66
12 Months or Longer, Fair Value	4,386	241
12 Months or Longer, Unrealized Losses	105	0
Total, Fair Value	21,101	8,935
Total, Unrealized Losses	$ 443	$ 66

Note 2 - Securities - Proceeds

Note 2 - Securities - Proceeds from Sale of Securities and Related Gross Gains (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Sales of securities available for sale	$ 6,769	$ 12,112
Gross gain realized on the sale of securities available for sale	131	114
Gross loss realized on the sale of securities available for sale	$ 0	$ (55)

Note 3 - Loans (Details Textual

Note 3 - Loans (Details Textual) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Impaired Financing Receivable, Unpaid Principal Balance, Total	$ 1,392,000	$ 2,895,000
Escrow Deposit	270,000	268,000
Loans and Leases Receivable, Related Parties, Ending Balance	556,000	928,000
First Mortgage Loans [Member]
Impaired Financing Receivable, Unpaid Principal Balance, Total	$ 15,800,000	$ 16,000,000

Note 3 - Loans - Summary of Loa

Note 3 - Loans - Summary of Loans by Major Category (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Loans	$ 96,501	$ 98,659
Net deferred loan costs	812	666
Allowance for loan losses	(779)	(870)	$ (389)
Loans, net	96,534	98,455
First Mortgage Loans [Member]
Loans	96,129	98,274
Consumer Portfolio Segment [Member]
Loans	372	385
Allowance for loan losses	(10)	(5)	(8)
One To Four Family Residential [Member] \| First Mortgage Loans [Member]
Loans	88,028	87,198
Allowance for loan losses	(675)	(798)	(362)
Multifamily [Member] \| First Mortgage Loans [Member]
Loans	3,497	5,736
Allowance for loan losses	(69)	(29)	(10)
Commercial Real Estate [Member] \| First Mortgage Loans [Member]
Loans	4,604	5,340
Allowance for loan losses	$ (25)	$ (38)	$ (9)

Note 4 - Allowance for Loan L_3

Note 4 - Allowance for Loan Losses (Details Textual) $ in Thousands	21 Months Ended
	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)
Financing Receivable, Troubled Debt Restructuring	$ 0	$ 0
Financing Receivable, Number of Payment Deferrals	50
Financing Receivable, Deferred Payments	$ 9,700
SBA CARES Act Paycheck Protection Program [Member]
Payments to Acquire Loans Receivable	$ 1,300

Note 4 - Allowance for Loan L_4

Note 4 - Allowance for Loan Losses - Changes in Allowance for Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Beginning balance	$ 870	$ 389
Charge-offs	(99)	0
Recoveries	31	17
Net recoveries (charge-offs)	(68)	17
(Reversal of) Provision for loan losses	(23)	464
Ending balance	779	870
Collectively evaluated allowance for loan losses	661	720
Collectively evaluated, Recorded investment in loans	95,365	96,137
Allowance for loan losses, individually evaluated	118	150
Individually evaluated, recorded investment in loans	1,136	2,522
Total, Allowance for loan losses	779	870
Loans	96,501	98,659
First Mortgage Loans [Member]
Loans	96,129	98,274
First Mortgage Loans [Member] \| One To Four Family Residential [Member]
Beginning balance	798	362
Charge-offs	0	0
Recoveries	31	17
Net recoveries (charge-offs)	31	17
(Reversal of) Provision for loan losses	(154)	419
Ending balance	675	798
Collectively evaluated allowance for loan losses	557	648
Collectively evaluated, Recorded investment in loans	86,892	84,775
Allowance for loan losses, individually evaluated	118	150
Individually evaluated, recorded investment in loans	1,136	2,423
Total, Allowance for loan losses	675	798
Loans	88,028	87,198
First Mortgage Loans [Member] \| Multifamily [Member]
Beginning balance	29	10
Charge-offs	0	0
Recoveries	0	0
Net recoveries (charge-offs)	0	0
(Reversal of) Provision for loan losses	40	19
Ending balance	69	29
Collectively evaluated allowance for loan losses	69	29
Collectively evaluated, Recorded investment in loans	3,497	5,736
Allowance for loan losses, individually evaluated	0	0
Individually evaluated, recorded investment in loans	0	0
Total, Allowance for loan losses	69	29
Loans	3,497	5,736
First Mortgage Loans [Member] \| Commercial Real Estate [Member]
Beginning balance	38	9
Charge-offs	0	0
Recoveries	0	0
Net recoveries (charge-offs)	0	0
(Reversal of) Provision for loan losses	(13)	29
Ending balance	25	38
Collectively evaluated allowance for loan losses	25
Collectively evaluated, Recorded investment in loans	4,604
Allowance for loan losses, individually evaluated	0
Individually evaluated, recorded investment in loans	0
Total, Allowance for loan losses	25
Loans	4,604	5,340
First Mortgage Loans [Member] \| Commercial Portfolio Segment [Member]
Collectively evaluated allowance for loan losses		38
Collectively evaluated, Recorded investment in loans		5,340
Allowance for loan losses, individually evaluated		0
Individually evaluated, recorded investment in loans		0
Total, Allowance for loan losses		38
Loans		5,340
Consumer Portfolio Segment [Member]
Beginning balance	5	8
Charge-offs	(99)	0
Recoveries	0	0
Net recoveries (charge-offs)	(99)	0
(Reversal of) Provision for loan losses	104	(3)
Ending balance	10	5
Collectively evaluated allowance for loan losses	10	5
Collectively evaluated, Recorded investment in loans	372	286
Allowance for loan losses, individually evaluated	0	0
Individually evaluated, recorded investment in loans	0	99
Total, Allowance for loan losses	10	5
Loans	$ 372	$ 385

Note 4 - Allowance for Loan L_5

Note 4 - Allowance for Loan Losses - Loan Balance Based on Risk Rating (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Loans	$ 96,501	$ 98,659
Pass [Member]
Loans	96,354	97,863
Special Mention [Member]
Loans	45	516
Substandard [Member]
Loans	102	280
Doubtful [Member]
Loans	0	0
First Mortgage Loans [Member]
Loans	96,129	98,274
First Mortgage Loans [Member] \| One To Four Family Residential [Member]
Loans	88,028	87,198
First Mortgage Loans [Member] \| One To Four Family Residential [Member] \| Pass [Member]
Loans	87,881	86,501
First Mortgage Loans [Member] \| One To Four Family Residential [Member] \| Special Mention [Member]
Loans	45	417
First Mortgage Loans [Member] \| One To Four Family Residential [Member] \| Substandard [Member]
Loans	102	280
First Mortgage Loans [Member] \| One To Four Family Residential [Member] \| Doubtful [Member]
Loans	0	0
First Mortgage Loans [Member] \| Multifamily [Member]
Loans	3,497	5,736
First Mortgage Loans [Member] \| Multifamily [Member] \| Pass [Member]
Loans	3,497	5,736
First Mortgage Loans [Member] \| Multifamily [Member] \| Special Mention [Member]
Loans	0	0
First Mortgage Loans [Member] \| Multifamily [Member] \| Substandard [Member]
Loans	0	0
First Mortgage Loans [Member] \| Multifamily [Member] \| Doubtful [Member]
Loans	0	0
First Mortgage Loans [Member] \| Commercial Real Estate [Member]
Loans	4,604	5,340
First Mortgage Loans [Member] \| Commercial Real Estate [Member] \| Pass [Member]
Loans	4,604	5,340
First Mortgage Loans [Member] \| Commercial Real Estate [Member] \| Special Mention [Member]
Loans	0	0
First Mortgage Loans [Member] \| Commercial Real Estate [Member] \| Substandard [Member]
Loans	0	0
First Mortgage Loans [Member] \| Commercial Real Estate [Member] \| Doubtful [Member]
Loans	0	0
Consumer Portfolio Segment [Member]
Loans	372	385
Consumer Portfolio Segment [Member] \| Pass [Member]
Loans	372	286
Consumer Portfolio Segment [Member] \| Special Mention [Member]
Loans	0	99
Consumer Portfolio Segment [Member] \| Substandard [Member]
Loans	0	0
Consumer Portfolio Segment [Member] \| Doubtful [Member]
Loans	$ 0	$ 0

Note 4 - Allowance for Loan L_6

Note 4 - Allowance for Loan Losses - Aging of Bank's Loan Portfolio (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Loans	$ 96,501	$ 98,659
Non-accrual	102	280
First Mortgage Loans [Member]
Loans	96,129	98,274
First Mortgage Loans [Member] \| One To Four Family Residential [Member]
Loans	88,028	87,198
Non-accrual	102	280
First Mortgage Loans [Member] \| Multifamily [Member]
Loans	3,497	5,736
Non-accrual	0	0
First Mortgage Loans [Member] \| Commercial Real Estate [Member]
Loans	4,604	5,340
Non-accrual	0	0
Consumer Portfolio Segment [Member]
Loans	372	385
Non-accrual	0	0
Financial Asset, 31 to 89 Days Past Due [Member]
Loans	0	99
Financial Asset, 31 to 89 Days Past Due [Member] \| First Mortgage Loans [Member] \| One To Four Family Residential [Member]
Loans	0	0
Financial Asset, 31 to 89 Days Past Due [Member] \| First Mortgage Loans [Member] \| Multifamily [Member]
Loans	0	0
Financial Asset, 31 to 89 Days Past Due [Member] \| First Mortgage Loans [Member] \| Commercial Real Estate [Member]
Loans	0	0
Financial Asset, 31 to 89 Days Past Due [Member] \| Consumer Portfolio Segment [Member]
Loans	0	99
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	41	75
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] \| First Mortgage Loans [Member] \| One To Four Family Residential [Member]
Loans	41	75
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] \| First Mortgage Loans [Member] \| Multifamily [Member]
Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] \| First Mortgage Loans [Member] \| Commercial Real Estate [Member]
Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] \| Consumer Portfolio Segment [Member]
Loans	0	0
Financial Asset, Past Due [Member]
Loans	143	454
Financial Asset, Past Due [Member] \| First Mortgage Loans [Member] \| One To Four Family Residential [Member]
Loans	143	355
Financial Asset, Past Due [Member] \| First Mortgage Loans [Member] \| Multifamily [Member]
Loans	0	0
Financial Asset, Past Due [Member] \| First Mortgage Loans [Member] \| Commercial Real Estate [Member]
Loans	0	0
Financial Asset, Past Due [Member] \| Consumer Portfolio Segment [Member]
Loans	0	99
Financial Asset, Not Past Due [Member]
Loans	96,358	98,205
Financial Asset, Not Past Due [Member] \| First Mortgage Loans [Member] \| One To Four Family Residential [Member]
Loans	87,885	86,843
Financial Asset, Not Past Due [Member] \| First Mortgage Loans [Member] \| Multifamily [Member]
Loans	3,497	5,736
Financial Asset, Not Past Due [Member] \| First Mortgage Loans [Member] \| Commercial Real Estate [Member]
Loans	4,604	5,340
Financial Asset, Not Past Due [Member] \| Consumer Portfolio Segment [Member]
Loans	$ 372	$ 286

Note 4 - Allowance for Loan L_7

Note 4 - Allowance for Loan Losses - Loans Individually Evaluated for Impairment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Impaired loans with no related allowance, recorded investment	$ 355	$ 1,447
Impaired loans with no related allowance, unpaid principal balance	595	1,775
Average recorded investment, with no related allowance recorded	348	1,471
Interest income recognized, with no related allowance recorded	26	79
Impaired loans with a related allowance, recorded investment	781	1,075
Impaired loans with a related allowance, unpaid principal balance	797	1,120
Impaired loans, related allowance	118	150
Average recorded investment, with a related allowance recorded	797	1,104
Interest income recognized, with a related allowance recorded	35	51
Impaired loans, recorded investment	1,136	2,522
Impaired loans, unpaid principal balance	1,392	2,895
Average recorded investment	1,145	2,575
Interest income recognized	61	130
First Mortgage Loans [Member]
Impaired loans, unpaid principal balance	15,800	16,000
Consumer Portfolio Segment [Member]
Impaired loans with no related allowance, recorded investment	0	99
Impaired loans with no related allowance, unpaid principal balance	0	99
Average recorded investment, with no related allowance recorded	0	89
Interest income recognized, with no related allowance recorded	0	6
Impaired loans with a related allowance, recorded investment	0	0
Impaired loans with a related allowance, unpaid principal balance	0	0
Impaired loans, related allowance	0	0
Average recorded investment, with a related allowance recorded	0	0
Interest income recognized, with a related allowance recorded	0	0
One To Four Family Residential [Member] \| First Mortgage Loans [Member]
Impaired loans with no related allowance, recorded investment	355	1,348
Impaired loans with no related allowance, unpaid principal balance	595	1,676
Average recorded investment, with no related allowance recorded	348	1,382
Interest income recognized, with no related allowance recorded	26	73
Impaired loans with a related allowance, recorded investment	781	1,075
Impaired loans with a related allowance, unpaid principal balance	797	1,120
Impaired loans, related allowance	118	150
Average recorded investment, with a related allowance recorded	797	1,104
Interest income recognized, with a related allowance recorded	35	51
Multifamily [Member] \| First Mortgage Loans [Member]
Impaired loans with no related allowance, recorded investment	0	0
Impaired loans with no related allowance, unpaid principal balance	0	0
Average recorded investment, with no related allowance recorded	0	0
Interest income recognized, with no related allowance recorded	0	0
Impaired loans with a related allowance, recorded investment	0	0
Impaired loans with a related allowance, unpaid principal balance	0	0
Impaired loans, related allowance	0	0
Average recorded investment, with a related allowance recorded	0	0
Interest income recognized, with a related allowance recorded	0	0
Commercial Real Estate [Member] \| First Mortgage Loans [Member]
Impaired loans with no related allowance, recorded investment	0	0
Impaired loans with no related allowance, unpaid principal balance	0	0
Average recorded investment, with no related allowance recorded	0	0
Interest income recognized, with no related allowance recorded	0	0
Impaired loans with a related allowance, recorded investment	0	0
Impaired loans with a related allowance, unpaid principal balance	0	0
Impaired loans, related allowance	0	0
Average recorded investment, with a related allowance recorded	0	0
Interest income recognized, with a related allowance recorded	$ 0	$ 0

Note 5 - Premises and Equipme_3

Note 5 - Premises and Equipment - Components of Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Land and improvements	$ 2,701	$ 2,703
Building and improvements	6,576	6,486
Furniture and equipment	1,372	1,617
Total gross equipment	10,649	10,806
Less accumulated depreciation	5,562	5,593
Premises and equipment, net	$ 5,087	$ 5,213

Note 6 - Other Real Estate Ow_3

Note 6 - Other Real Estate Owned (Details Textual) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Other Real Estate, Ending Balance	$ 0	$ 0
Mortgage Loans in Process of Foreclosure, Amount	$ 60,000	$ 111,000

Note 6 - Other Real Estate Ow_4

Note 6 - Other Real Estate Owned - Movement in OREO (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Transfer of loans to OREO	$ 172	$ 0
Sale of OREO	194	0
Gross gain realized on transfer to OREO	15	0
Gross gain realized on sale of OREO	$ 7	$ 0

Note 7 - Deposits (Details Text

Note 7 - Deposits (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Deposits, Total	$ 285,621	$ 186,404
Directors and Officers [Member]
Deposits, Total	1,100	$ 4,300
North Shore Trust and Savings [Member]
Proceeds from Future Issuance of Stock, Held in Deposit	$ 87,300

Note 7 - Deposits - Scheduled M

Note 7 - Deposits - Scheduled Maturities of Time Deposits (Details) $ in Thousands	Dec. 31, 2021USD ($)
2022	$ 39,927
2023	15,037
2024	9,508
2025	5,537
2026 and beyond	2,865
Total	$ 72,874

Note 8 - Other Borrowings (Deta

Note 8 - Other Borrowings (Details Textual) - USD ($) $ in Thousands	May 21, 2021	Dec. 31, 2021	Dec. 31, 2020
Proceeds from FHLBank Borrowings, Financing Activities	$ 5,000	$ 5,000	$ 4,000
Payments of FHLBank Borrowings, Financing Activities	$ 4,000	4,000	0
Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available		60,800	61,100
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged		$ 76,800	$ 77,300

Note 9 - Income Taxes (Details

Note 9 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Unrecognized Tax Benefits, Ending Balance	$ 0	$ 0
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	0
Domestic Tax Authority [Member]
Operating Loss Carryforwards, Total	$ 1,500	0
Open Tax Year	2018 2019 2020
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Total	$ 3,200	$ 2,300
State and Local Jurisdiction [Member] \| Illinois Department of Revenue [Member]
Open Tax Year	2017 2018 2019 2020
State and Local Jurisdiction [Member] \| Wisconsin Department of Revenue [Member]
Open Tax Year	2017 2018 2019 2020

Note 9 - Income Taxes - Income

Note 9 - Income Taxes - Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Federal	$ 62	$ (262)
State	0	3
Total current benefit	62	(259)
Deferred benefit	(379)	(233)
Change in valuation allowance	103	(11)
Total deferred benefit	(276)	(244)
Total income tax benefit	$ (214)	$ (503)

Note 9 - Income Taxes - Provisi

Note 9 - Income Taxes - Provisions for Income Taxes Differs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income before income tax expense	$ (269)	$ (615)
Tax benefit at statutory federal rate of 21% applied to income before income tax benefit	56	129
State income tax, net of federal effect	51	117
Tax-exempt security and loan income, net of TEFRA adjustments	50	54
BOLI	38	38
Other	19	165
Total income tax expense	$ 214	$ 503
Effective tax rate	(79.60%)	(81.80%)

Note 9 - Income Taxes - Provi_2

Note 9 - Income Taxes - Provisions for Income Taxes Differs (Details) (Parentheticals)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Federal rate	21.00%	21.00%

Note 9 - Income Taxes - Deferre

Note 9 - Income Taxes - Deferred Tax Assets and Deferred Tax Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Allowance for loan losses	$ 222	$ 248
Deferred compensation	432	422
Retirement plans	55	147
Premises held for sale impairment	101	101
Unrealized loss on securities available-for-sale	32	0
Federal net operating loss carryforwards	218	0
Other	53	39
State net operating loss carryforwards	306	203
Gross deferred tax assets	1,419	1,160
Valuation allowance	(306)	(203)
Net deferred tax assets	1,113	957
FHLB stock dividends	(101)	(101)
Accumulated depreciation	(36)	(46)
Unrealized gain on securities available-for-sale	0	(561)
Other	0	(142)
Deferred tax liabilities	(137)	(850)
Net deferred tax asset	$ 976	$ 107

Note 10 - Capital Ratios (Detai

Note 10 - Capital Ratios (Details Textual)	Dec. 31, 2021
Banking Regulation, Capital Conservation Buffer, Capital Conserved, Minimum	0.025

Note 10 - Capital Ratios - Actu

Note 10 - Capital Ratios - Actual Capital Amount and Ratios (Details) $ in Thousands		Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)
Tier 1 capital (to Average Assets), actual amount		$ 44,262	$ 44,256
Tier 1 capital (to Average Assets), actual ratio		0.1611	0.1841
Tier 1 capital (to Average Assets), minimum required to be well capitalized	[1]	$ 23,349	$ 21,636
Tier 1 capital (to Average Assets), minimum required to be well capitalized ratio	[1]	0.085	0.08

[1]	As defined by regulatory agencies. Failure to exceed the leverage ratio thresholds required under CBLR in the future, subject to any applicable grace period, would require the Company to return to the risk-based capital ratio thresholds previously utilized under the fully phased-in Basel III Capital Rules to determine capital adequacy.

Note 11 - Benefit Plans (Detail

Note 11 - Benefit Plans (Details Textual) - USD ($)	12 Months Ended
Note 11 - Benefit Plans (Details Textual) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Benefit Plan 401 K [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	6.00%
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 156,000	$ 163,000
Profit-Sharing Plan [Member]
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 0

Note 12 - Commitments and Con_3

Note 12 - Commitments and Contingencies (Details Textual)	Dec. 31, 2021
First Mortgage Loans [Member] \| One To Four Family Residential [Member]
Financing Receivable, Minimum Percentage of Loan-to-value Ratio, Requires Mortgage Insurance	80.00%

Note 12 - Commitments and Con_4

Note 12 - Commitments and Contingencies - Outstanding Commitments to Originate Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Total commitments	$ 4,220	$ 5,156
Unused Line of Credit [Member]
Total commitments	4,001	4,372
Commitments to Extend Credit [Member]
Total commitments	$ 219	$ 784

Note 13 - Fair Value Measurem_3

Note 13 - Fair Value Measurements - Fair Value On Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Securities available for sale	$ 100,950	$ 81,620
US Government Agencies Debt Securities [Member]
Securities available for sale	10,053	7,147
Municipal Bonds [Member]
Securities available for sale	18,000	10,980
Residential Mortgage Backed Securities [Member]
Securities available for sale	42,148	43,094
Fair Value, Recurring [Member]
Securities available for sale	100,950	81,620
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Securities available for sale	0	0
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Securities available for sale	100,950	81,620
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Securities available for sale	0	0
Fair Value, Recurring [Member] \| US Government Agencies Debt Securities [Member]
Securities available for sale	10,053	7,147
Fair Value, Recurring [Member] \| US Government Agencies Debt Securities [Member] \| Fair Value, Inputs, Level 1 [Member]
Securities available for sale	0	0
Fair Value, Recurring [Member] \| US Government Agencies Debt Securities [Member] \| Fair Value, Inputs, Level 2 [Member]
Securities available for sale	10,053	7,147
Fair Value, Recurring [Member] \| US Government Agencies Debt Securities [Member] \| Fair Value, Inputs, Level 3 [Member]
Securities available for sale	0	0
Fair Value, Recurring [Member] \| Municipal Bonds [Member]
Securities available for sale	18,000	10,980
Fair Value, Recurring [Member] \| Municipal Bonds [Member] \| Fair Value, Inputs, Level 1 [Member]
Securities available for sale	0	0
Fair Value, Recurring [Member] \| Municipal Bonds [Member] \| Fair Value, Inputs, Level 2 [Member]
Securities available for sale	18,000	10,980
Fair Value, Recurring [Member] \| Municipal Bonds [Member] \| Fair Value, Inputs, Level 3 [Member]
Securities available for sale	0	0
Fair Value, Recurring [Member] \| Residential Mortgage Backed Securities [Member]
Securities available for sale	42,148	43,094
Fair Value, Recurring [Member] \| Residential Mortgage Backed Securities [Member] \| Fair Value, Inputs, Level 1 [Member]
Securities available for sale	0	0
Fair Value, Recurring [Member] \| Residential Mortgage Backed Securities [Member] \| Fair Value, Inputs, Level 2 [Member]
Securities available for sale	42,148	43,094
Fair Value, Recurring [Member] \| Residential Mortgage Backed Securities [Member] \| Fair Value, Inputs, Level 3 [Member]
Securities available for sale	0	0
Fair Value, Recurring [Member] \| Collateralized Mortgage Obligations [Member]
Securities available for sale	30,749	20,399
Fair Value, Recurring [Member] \| Collateralized Mortgage Obligations [Member] \| Fair Value, Inputs, Level 1 [Member]
Securities available for sale	0	0
Fair Value, Recurring [Member] \| Collateralized Mortgage Obligations [Member] \| Fair Value, Inputs, Level 2 [Member]
Securities available for sale	30,749	20,399
Fair Value, Recurring [Member] \| Collateralized Mortgage Obligations [Member] \| Fair Value, Inputs, Level 3 [Member]
Securities available for sale	$ 0	$ 0

Note 13 - Fair Value Measurem_4

Note 13 - Fair Value Measurements - Measure Nonrecurring Fair Value Measurements (Details) - Fair Value, Nonrecurring [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Impaired loans	$ 663	$ 925
Gain (loss) on impaired loans	0	0
Fair Value, Inputs, Level 1 [Member]
Impaired loans	0	0
Fair Value, Inputs, Level 2 [Member]
Impaired loans	0	0
Fair Value, Inputs, Level 3 [Member]
Impaired loans	$ 663	$ 925

Note 14 - Fair Value of Finan_3

Note 14 - Fair Value of Financial Instruments - Carrying Amounts and Estimated Fair Value Hierarchy of Certain Financial Information (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Reported Value Measurement [Member]
Loans, net	$ 96,534	$ 98,455
Loans held for sale	104	1,972
Interest-bearing deposits	186,531	176,670
Estimate of Fair Value Measurement [Member]
Loans, net	96,391	102,034
Loans held for sale	112	1,972
Interest-bearing deposits	181,564	177,280
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member]
Loans, net	0	0
Loans held for sale	0	0
Interest-bearing deposits	0	0
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 2 [Member]
Loans, net	96,391	102,034
Loans held for sale	112	1,972
Interest-bearing deposits	181,564	177,280
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member]
Loans, net	0	0
Loans held for sale	0	0
Interest-bearing deposits	$ 0	$ 0

Note 15 - Condensed Parent On_3

Note 15 - Condensed Parent Only Financial Information - Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other assets	$ 2,852	$ 581
Total assets	340,869	242,219
Accrued expenses and other liabilities	3,623	3,571
Total liabilities	295,686	195,494
Members’ equity	45,183	46,725	$ 45,764
Total liabilities and members' equity	340,869	242,219
Parent Company [Member]
Cash	230	993
Investment in subsidiary	44,200	45,687
Other assets	753	48
Total assets	45,183	46,728
Accrued expenses and other liabilities	0	3
Total liabilities	0	3
Members’ equity	45,183	46,725
Total liabilities and members' equity	$ 45,183	$ 46,728

Note 15 - Condensed Parent On_4

Note 15 - Condensed Parent Only Financial Information - Condensed Statements of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Noninterest expense	$ 5,599	$ 6,277
Losses before income taxes	(269)	(615)
Income tax benefit	(214)	(503)
Net losses	(55)	(112)
Parent Company [Member]
Interest income	1	1
Total income	1	1
Noninterest expense	19	229
Total expense	19	229
Losses before income taxes	(18)	(228)
Income tax benefit	38	(56)
Losses before equity in undistributed earnings of subsidiary	(56)	(172)
Equity in undistributed earnings of subsidiary	1	60
Net losses	$ (55)	$ (112)

Note 15 - Condensed Parent On_5

Note 15 - Condensed Parent Only Financial Information - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Net income (losses)	$ (55)	$ (112)
Net cash provided by (used in) operating activities	1,452	(620)
Net cash provided by financing activities	100,140	6,043
Net change in cash and cash equivalents	89,743	(511)
Cash and cash equivalents at beginning of period	31,868	32,379
Cash and cash equivalents at end of period	121,611	31,868
Parent Company [Member]
Net income (losses)	(55)	(112)
Decrease (increase) in other assets	(704)	80
Increase (decrease) in accrued expenses and other liabilities	(3)	3
Equity in undistributed earnings of subsidiary	(1)	(60)
Net cash provided by (used in) operating activities	(763)	(89)
Dividends received from subsidiary	0	950
Net cash provided by financing activities	0	950
Net change in cash and cash equivalents	(763)	861
Cash and cash equivalents at beginning of period	993	132
Cash and cash equivalents at end of period	$ 230	$ 993