FSB Bancorp 10-K 16 Mar 17 2016 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2016	Mar. 16, 2017	Jun. 30, 2016
Document and Entity Information [Abstract]
Entity Registrant Name	FSB Bancorp, Inc.
Entity Central Index Key	1,667,939
Trading Symbol	fsbc
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Company
Entity Well-known Seasoned Issuer	No
Entity Common Stock, Shares Outstanding		1,941,688
Entity Public Float			$ 0
Document Type	10-K
Document Period End Date	Dec. 31, 2016
Amendment Flag	false
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	FY

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Assets
Cash and due from banks	$ 1,634	$ 1,550
Interest-earning demand deposits	5,773	4,597
Cash and Cash Equivalents	7,407	6,147
Securities available-for-sale	17,747	19,968
Securities held-to-maturity (fair value 2016 $7,384; 2015 $13,222)	7,420	12,979
Investment in FHLB stock	2,886	2,388
Loans held for sale	2,059	3,880
Loans, net of allowance for loan losses (2016 $990; 2015 $811)	226,192	201,830
Bank owned life insurance	3,696	3,629
Accrued interest receivable	652	655
Premises and equipment, net	3,175	2,744
Other assets	2,487	1,587
Total Assets	273,721	255,807
Deposits:
Non-interest bearing	8,423	6,974
Interest bearing	174,511	178,587
Total Deposits	182,934	185,561
Borrowings	56,813	46,092
Official bank checks	318	1,114
Other liabilities	1,797	1,280
Total Liabilities	241,862	234,047
Stockholders' Equity
Preferred stock, par value $0.01 and no par value; 25,000,000 and 1,000,000 shares authorized, no shares issued and outstanding
Common stock; par value $0.01 and $0.10; 50,000,000 and 10,000,000 shares authorized; 1,941,688 and 1,785,000 shares issued; 1,941,688 and 1,779,472 shares outstanding in 2016 and 2015, respectively	19	179
Paid-in capital	16,352	7,239
Retained earnings	15,923	14,985
Accumulated other comprehensive loss	(85)	(212)
Treasury stock at cost, 2016-0 shares, 2015-5,528 shares		(46)
Unearned ESOP shares - at cost	(350)	(385)
Total Stockholders' Equity	31,859	21,760
Total Liabilities and Stockholders' Equity	$ 273,721	$ 255,807

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthenticals) - USD ($) $ in Thousands	Dec. 31, 2016		Dec. 31, 2015
Statement Of Financial Position [Abstract]
Fair value securities held to maturity (in dollars)	$ 7,384		$ 13,222
Allowance for loan losses (in dollars)	$ 990	[1]	$ 811
Preferred stock - par value (in dollars per share)	$ 0.01		$ 0
Preferred stock, shares authorized with par value	25,000,000		1,000,000
Preferred stock, shares issued	0		0
Preferred stock, shares outstanding	0		0
Common stock - par value (in dollars per share)	$ 0.01		$ 0.10
Common stock, shares authorized	50,000,000		10,000,000
Common stock, shares issued	1,941,688		1,785,000
Common stock, shares outstanding	1,941,688		1,779,472
Treasury stock, shares	0		5,528
[1]	All Loans are collectively evaluated for impairment.

Consolidated Statements of Inco

Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Interest and Dividend Income
Loans, including fees	$ 8,724	$ 8,125
Securities - taxable	269	473
Securities - tax exempt	99	93
Mortgage-backed securities	202	223
Other	23	6
Total Interest and Dividend Income	9,317	8,920
Interest Expense
Deposits	1,436	1,252
Short-term borrowings	9	7
Long-term borrowings	711	736
Total Interest Expense	2,156	1,995
Net Interest Income	7,161	6,925
Provision for loan losses	180	158
Net Interest Income after Provision for loan losses	6,981	6,767
Other Income
Service fees	157	159
Fee income	169	228
Realized gain on sale of securities	36	106
Increase in cash surrender value of bank owned life insurance	67	74
Realized gain on sale of loans	2,252	1,478
Mortgage fee income	814	632
Other	160	158
Total Other Income	3,655	2,835
Other Expense
Salaries and employee benefits	6,095	5,372
Occupancy	1,006	1,004
Data processing costs	186	159
Advertising	125	126
Equipment	611	596
Electronic banking	115	97
Directors' fees	249	183
Mortgage fees and taxes	(127)	424
FDIC premium expense	138	157
Audit and tax services	141	86
Professional services	168	105
Other	663	644
Total Other Expense	9,370	8,953
Income before Income Taxes	1,266	649
Provision for Income Taxes	328	136
Net Income	$ 938	$ 513
Basic earnings per common share (in dollars per share)	$ 0.49	$ 0.27

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Statement Of Income and Comprehensive Income [Abstract]
Net Income	$ 938	$ 513
Other Comprehensive Income (Loss)
Change in unrealized holding losses on securities available-for-sale	(86)	(96)
Accretion of net unrealized losses on securities transferred from available-for-sale(1)	323	32
Reclassification adjustment for realized gains on securities available-for-sale included in net income	(24)	(64)
Reclassification adjustment for realized gains on securities held-to-maturity included in net income	(12)	(42)
Other Comprehensive Income (Loss), Before Tax	201	(170)
Income Tax (Provision) Benefit Related to Other Comprehensive Income (Loss)	(74)	184
Other Comprehensive Income, Net of Tax	127	14
Comprehensive Income	1,065	527
Tax Effect Allocated to Each Component of Other Comprehensive Income (Loss)
Change in unrealized holding losses on securities available-for-sale	29	33
Accretion of net unrealized losses on securities transferred from available-for-sale	(115)	115
Reclassification adjustment for realized gains on securities available-for-sale included in net income	8	21
Reclassification adjustment for realized gains on securities held-to-maturity included in net income	4	15
Tax Effect Allocated to Each Component of Other Comprehensive Income (Loss)	$ (74)	$ 184

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock	Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury stock	Unearned ESOP	Total
Balance at Dec. 31, 2014	$ 179	$ 7,239	$ 14,472	$ (226)	$ (40)	$ (420)	$ 21,204
Comprehensive loss:
Net income			513				513
Other comprehensive income, net				14			14
Effect of employee stock ownership plan, net					(6)		(6)
ESOP shares committed to be released						35	35
Balance at Dec. 31, 2015	179	7,239	14,985	(212)	(46)	(385)	21,760
Comprehensive loss:
Net income			938				938
Other comprehensive income, net				127			127
ESOP shares committed to be released		9				35	44
Proceeds of common stock offering and conversion of existing shares, net of expenses	(159)	9,149					8,990
Cancel 5,528 treasury shares	(1)	(45)			$ 46
Balance at Dec. 31, 2016	$ 19	$ 16,352	$ 15,923	$ (85)		$ (350)	$ 31,859

Consolidated Statements of Sto7

Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical)	12 Months Ended
	Dec. 31, 2016shares
Statement Of Stockholders Equity [Abstract]
Number of treasury shares canceled (in shares)	5,528

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Cash Flows from Operating Activities
Net income	$ 938	$ 513
Adjustments to reconcile net income to net cash flows from operating activities:
Net amortization of premiums and accretion of discounts on investments	327	412
Net gain on sales of securities	(36)	(106)
Gain on sale of loans	(2,252)	(1,478)
Proceeds from loans sold	76,220	87,336
Loans originated for sale	(72,147)	(86,777)
Amortization of net deferred loan origination costs	249	128
Depreciation and amortization	444	453
Provision for loan losses	180	158
Expense related to ESOP	44	35
Deferred income tax benefit	(116)	(116)
Earnings on investment in bank owned life insurance	(67)	(74)
Decrease in accrued interest receivable	3
Increase in other assets	(900)	(399)
Increase in other liabilities	675	165
Net Cash Flows From Operating Activities	3,562	250
Cash Flows from Investing Activities
Purchases of securities available-for-sale	(12,579)	(9,133)
Proceeds from maturities and calls of securities available-for-sale	11,285	4,000
Proceeds from sales of securities available-for-sale	2,213	2,574
Proceeds from principal paydowns on securities available-for-sale	1,106	4,174
Purchases of securities held-to-maturity	(2,204)	(1,243)
Proceeds from maturities and calls of securities held-to-maturity	7,334	4,307
Proceeds from sales of securities held-to-maturity	393	856
Proceeds from principal paydowns on securities held-to-maturity	26	542
Net increase in loans	(24,791)	(13,286)
(Purchase) redemption of Federal Home Loan Bank stock, net	(498)	61
Purchase of premises and equipment	(875)	(361)
Net Cash Flows From Investing Activities	(18,590)	(7,509)
Cash Flows from Financing Activities
Net (decrease) increase in deposits	(2,627)	10,254
Proceeds from long-term borrowings	19,000	12,500
Repayments on long-term borrowings	(14,279)	(12,833)
Net increase (decrease) in short-term borrowings	6,000	(1,500)
Purchase of treasury stock		(6)
Net proceeds from stock conversion and offering	8,990
Net (decrease) increase in official bank checks	(796)	656
Net Cash Flows From Financing Activities	16,288	9,071
Change in Cash and Cash Equivalents	1,260	1,812
Cash and Cash Equivalents - Beginning	6,147	4,335
Cash and Cash Equivalents - Ending	7,407	6,147
Supplementary Cash Flows Information
Interest paid	2,145	$ 1,994
Taxes paid	$ 306

Nature of Operations and Summar

Nature of Operations and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Nature of Operations and Summary of Significant Accounting Policies	Note 1 - Nature of Operations and Summary of Significant Accounting Policies Organization and Nature of Operations On December 17, 2003, Fairport Savings Bank’s (the “Bank”) depositors approved a Plan of Reorganization (the “Plan”) from a Federal Mutual Savings Bank to a Federal Mutual Holding Company. Under the Plan, effective January 14, 2005, FSB Community Bankshares, MHC (the “Mutual Holding Company”) was incorporated under the laws of the United States as a mutual holding company. Also under the Plan, FSB Community Bankshares, Inc. (“FSB Community”) was incorporated and became a wholly-owned subsidiary of the Mutual Holding Company. In addition, effective January 14, 2005, the Bank completed its reorganization whereby the Bank converted to a stock savings bank and became a wholly-owned subsidiary of the Company. In August 2007, the Company completed its minority stock offering of 47% of the aggregate total voting stock of the Company. In connection with the minority stock offering, 1,785,000 shares of common stock were issued, of which 838,950 shares were sold, including 69,972 issued to the Company’s Employee Stock Ownership Plan (ESOP), at $10 per share raising net proceeds of $7.4 million. The stock was offered to the Bank’s eligible depositors, the Bank’s ESOP, and the public. Additionally, the Company issued 946,050 shares, or 53% of its common stock, to the Mutual Holding Company. On March 2, 2016, the Boards of Directors of the FSB Community Bankshares, Inc. (“FSB Community”), FSB Community Bankshares, MHC (the “M-H-C”), and Fairport Savings Bank (the “Bank”) unanimously adopted a Plan of Conversion of FSB Community Bankshares, MHC pursuant to which FSB Community Bankshares, MHC undertook a “second-step” conversion and now no longer exists. The Bank reorganized from a two-tier mutual holding company structure to a fully public stock holding company structure effective July 13, 2016, and, as a result is now the wholly-owned subsidiary of FSB Bancorp, Inc. (the “Company”). References to the Company prior to July 13, 2016 include FSB Community and not FSB Bancorp, whereas after July 13, 2016 references to the Company include FSB Bancorp and not FSB Community. FSB Bancorp, the new stock holding company for Fairport Savings Bank, sold 1,034,649 shares of common stock at $10.00 per share, for gross offering proceeds of $10.3 million in its stock offering. Additionally, after accounting for conversion related expenses of $1.4 million, which offset gross proceeds, the Company received $8.9 million in net proceeds. Concurrent with the completion of the conversion and reorganization, shares of common stock of FSB Community owned by public stockholders were exchanged for shares of the Company’s common stock so that the former public stockholders of FSB Community owned approximately the same percentage of the Company’s common stock as they owned of FSB Community’s common stock immediately prior to the conversion. Stockholders of FSB Community received 1.0884 shares of the Company’s common stock for each share of FSB Community’s stock they owned immediately prior to completion of the transaction. Cash in lieu of fractional shares was paid based on the offering price of $10.00 per share. All share and per share information in these financial statements for periods prior to the conversion have been revised to reflect the 1.0884:1 conversion ratio on shares outstanding, including shares held by FSB Community Bankshares, MHC that were not publicly traded. As a result of the offering and the exchange of shares, the Company has 1,941,688 shares outstanding as of December 31, 2016. On July 13, 2016, FSB Community Bankshares, MHC reorganized from a two-tier mutual holding company structure to a fully public stock holding company structure. In accordance with Board of Governors of the Federal Reserve System regulations, at the time of the reorganization, the Company substantially restricted retained earnings by establishing a liquidation account. The liquidation account will be maintained for the benefit of eligible account holders who continue to maintain their accounts at the Bank after conversion. The Bank has established a parallel liquidation account to support the Company’s liquidation account in the event the Company does not have sufficient assets to fund its obligations under its liquidation account. The liquidation accounts will be reduced annually to the extent that eligible account holders have reduced their qualifying deposits. Subsequent increases will not restore an eligible account holder’s interest in the liquidation accounts. In the event of a complete liquidation of the Bank or the Company, each account holder will be entitled to receive a distribution in an amount proportionate to the adjusted qualifying account balances then held. The Bank may not pay dividends if those dividends would reduce equity capital below the required liquidation account amount. The Company provides a variety of financial services to individuals and corporate customers through its wholly-owned subsidiary, Fairport Savings Bank. The Bank’s operations are conducted in five branches located in Monroe County, New York. The Company and the Bank are subject to the regulations of certain regulatory authorities and undergo periodic examinations by those regulatory authorities. The Company’s principal business consists of originating one-to-four-family residential real estate mortgages, home equity loans and lines of credit and to a lesser extent, originations of commercial real estate, multi-family, construction, commercial and industrial, and other consumer loans. The Company has four mortgage origination offices located in Pittsford, New York, Watertown, New York, Greece, New York, and Buffalo, New York. The Bank also provides non-deposit investment services to its customers through its wholly-owned subsidiary, Fairport Wealth Management. Previous to January 15, 2016, Fairport Wealth Management was known as Oakleaf Services Corporation. The results of operations of Fairport Wealth Management are not material to the consolidated financial statements. Basis of Consolidation The consolidated financial statements include the accounts of the Company, the Bank and Fairport Wealth Management. All significant intercompany accounts and transactions have been eliminated in consolidation. Use of Estimates The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) 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 consolidated financial statements and the reported amounts of revenue and expense during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant changes in the near term relate to the determination of the allowance for loan losses, deferred tax assets, and the estimation of fair values for accounting and disclosure purposes. The Company is subject to the regulations of various governmental agencies. The Company also undergoes periodic examinations by the regulatory agencies which may subject it to further changes with respect to asset valuations, amounts of required loss allowances, and operating restrictions resulting from the regulators’ judgements based on information available to them at the time of their examinations. Significant Group Concentrations of Credit Risk Most of the Company’s activities are with customers located within Monroe, Livingston, Ontario, Orleans, Wayne, and Erie Counties, New York. Note 2 discusses the types of securities that the Company invests in. The concentration of credit by type of loan is set forth in Note 3. Although the Bank has a diversified loan portfolio, its debtors’ ability to honor their contracts is primarily dependent upon the real estate and general economic conditions in those areas. Cash and Cash Equivalents For purposes of the consolidated statements of cash flows, cash and cash equivalents include cash, balances due from banks and interest-earning demand deposits (with an original maturity of three months or less). Securities The Company classifies investment securities as either available-for-sale or held-to-maturity. The Company does not hold any securities considered to be trading. Available-for-sale securities are reported at fair value, with net unrealized gains and losses reflected as a separate component of stockholders’ equity, net of the applicable income tax effect. Held-to-maturity securities are those that the Company has the ability and intent to hold until maturity and are reported at amortized cost. Gains or losses on investment security transactions are based on the amortized cost of the specific securities sold. Premiums and discounts on securities are amortized and accreted into income using the interest method over the period to maturity. When the fair value of a held-to-maturity or available-for-sale security is less than its amortized cost basis, an assessment is made at the balance sheet date as to whether other-than-temporary impairment (“OTTI”) is present. The Company considers numerous factors when determining whether potential OTTI exists and the period over which the debt security is expected to recover. The principal factors considered are (1) the length of time and the extent to which the fair value has been less than amortized cost basis, (2) the financial condition of the issuer (and guarantor, if any) and adverse conditions specifically related to the security industry or geographic area, (3) failure of the issuer of the security to make scheduled interest or principal payments, (4) any changes to the rating of a security by a rating agency, and (5) the presence of credit enhancements, if any, including the guarantee of the federal government or any of its agencies. For debt securities, OTTI is considered to have occurred if (1) the Company intends to sell the security, (2) it is more likely than not the Company will be required to sell the security before recovery of its amortized cost basis, or (3) if the present value of expected cash flows is not sufficient to recover the entire amortized cost basis or carrying value. For debt securities, credit-related OTTI is recognized in earnings while noncredit-related OTTI on securities not expected to be sold is recognized in other comprehensive income (loss). Credit-related OTTI is measured as the difference between the present value of an impaired security’s expected cash flows and its amortized cost basis or carrying value. Noncredit-related OTTI is measured as the difference between the fair value of the security and its amortized cost, or carrying value, less any credit-related losses recognized. For securities classified as held-to-maturity, the amount of OTTI recognized in other comprehensive income (loss) is accreted to the credit-adjusted expected cash flow amounts of the securities over future periods. Investment securities are exposed to various risks such as interest rate, market and credit risks. Due to the level of risk associated with certain investment securities, it is at least reasonably possible that changes in the values of investment securities will occur in the near term and that such changes could materially affect the amounts reported in the accompanying financial statements. Federal Home Loan Bank of New York Federal law requires a member institution of the Federal Home Loan Bank System to hold stock of its district Federal Home Loan Bank (“FHLB”) according to a predetermined formula. This restricted stock is carried at cost. Management’s determination of whether this investment is impaired is based on their assessment of the ultimate recoverability of its cost rather than by recognizing temporary declines in value. The determination of whether a decline affects the ultimate recoverability of cost is influenced by criteria such as (1) the significance of the decline in net assets of the FHLB as compared to the capital stock amount for the FHLB and the length of time this situation has persisted, (2) commitments by the FHLB to make payments required by law or regulation and the level of such payments in relation to the operating performance of the FHLB, and (3) the impact of legislative and regulatory changes on institutions and, accordingly, on the customer base of the FHLB. No impairment charges were recorded related to the FHLB stock during 2016 or 2015. Loans Held for Sale Mortgage loans held for sale in the secondary market are carried at the lower of cost or fair value. Separate determinations of fair value for residential and commercial loans are made on an aggregate basis. Fair value is determined based solely on the effect of changes in secondary market interest rates and yield requirements from the commitment date to the date of the consolidated financial statements. Realized gains and losses on sales are computed using the specific identification method. Loan Servicing Rights The Company retains the servicing on most conventional fixed-rate mortgage loans sold and receives a fee based on the principal balance outstanding. Loans serviced for others totaled $118,565,000 and $85,858,000 at December 31, 2016 and 2015, respectively. The Company also sells correspondent FHA and VA mortgage loans, servicing released. Loan servicing rights are recorded at fair value when loans are sold with servicing rights retained. The fair value of the mortgage servicing rights (“MSRs”) is determined using a method which utilizes servicing income, discount rates, and prepayment speeds relative to the Bank’s portfolio for MSRs and are amortized over the life of the loan. MSRs amounted to $804,000 and $561,000 at December 31, 2016 and 2015, respectively, and are included in other assets on the consolidated balance sheets. In 2016, $268,000 was capitalized and $25,000 was amortized. In 2015, $227,000 was capitalized with $32,000 amortized. Loans 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 net deferred origination fees and costs. 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 of the related loan yield using the interest method over the estimated life of the loan. The accrual of interest is generally discontinued when the contractual payment of principal or interest has become 90 days past due or management has serious doubts about further collectability of principal or interest, even though the loan is currently performing. A loan may remain on accrual status if it is in the process of collection and is well secured. When a loan is placed on nonaccrual status, unpaid interest credited to income in the current year is reversed. Interest received on nonaccrual loans generally is either applied against principal or reported as interest income, according to management’s judgment as to the collectability of principal. Generally, loans are restored to accrual status when the obligation is brought current, has performed in accordance with the contractual terms for a reasonable period of time and the ultimate collectability of the total contractual principal and interest is no longer in doubt. Allowance for Loan Losses The allowance for loan losses (the “Allowance”) is established as losses are estimated to have occurred in the loan portfolio. The allowance for loan losses is recorded through a provision for loan losses charged to earnings. Loan losses are charged against the allowance when management believes the loan is uncollectable. Subsequent recoveries, if any, are credited to the allowance. The allowance for loan losses is evaluated on a regular basis by management and is based upon management’s periodic review of the collectability of the loans in light of historical experience, the nature and volume of the loan portfolio, adverse situations that may affect the borrower’s ability to repay, the estimated value of any underlying collateral and prevailing economic conditions. This evaluation is inherently subjective as it requires estimates that are susceptible to significant revision as more information becomes available. The allowance consists of specific, general and unallocated components. The specific component relates to loans that are deemed impaired and classified as either special mention, substandard, doubtful, or loss. For such loans that are also classified as impaired, an allowance is generally established when the collateral value of the impaired loan is lower than the carrying value of that loan. The general component covers non-classified loans and is based on historical loss experience adjusted for the following qualitative factors: effects of changes in lending policies; national and/or local economic trends and conditions; trends in volume and terms of loans; experience, ability, and depth of management; levels and trends of delinquencies, non-accruals and classified loans; quality of institutions loan review system; collateral value for collateral dependent loans; concentrations of credit; and competition, legal and regulatory requirements on level of estimated credit losses. An unallocated component is maintained to cover uncertainties that could affect management’s estimate of probable losses. The unallocated component of the allowance reflects the margin of imprecision inherent in the underlying assumptions used in the methodologies for estimating specific and general losses in the portfolio. 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 classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed. Impairment is measured on a loan by loan basis by either the present value of expected future cash flows discounted at the loan’s effective interest rate or the fair value of the collateral if the loan is collateral dependent. Large groups of smaller balance homogeneous loans are collectively evaluated for impairment. Accordingly, the Company does not separately identify individual consumer and residential loans for impairment disclosures unless subject to a troubled debt restructuring. In addition, Federal regulatory agencies, as an integral part of their examination process, periodically review the Company’s allowance for loan losses and may require the Company to recognize additions to the allowance based on their judgements about information available to them at the time of their examination, which may not be currently available to management. Based on management’s comprehensive analysis of the loan portfolio, management believes the current level of the allowance for loan losses is adequate. Bank Owned Life Insurance The Company holds life insurance policies on a key executive. Bank owned life insurance is recorded at the amount that can be realized under the insurance contract at the balance sheet date, which is the cash surrender value adjusted for other charges or other amounts due that are probable at settlement. Premises and Equipment Premises and equipment are stated at cost. Depreciation and amortization are computed on the straight-line basis over the shorter of the estimated useful lives or lease terms (in the case of leasehold improvements) of the related assets. Estimated useful lives are generally 20 to 30 years for premises and 3 to 10 years for furniture and equipment. Foreclosed Real Estate Real estate properties acquired through, or in lieu of, loan foreclosure are initially recorded at fair value less estimated selling costs at the date of foreclosure. Any write-downs based on the asset’s fair value at date of acquisition are charged to the allowance for loan losses. After foreclosure, property held for sale is carried at the lower of the new basis or fair value less any costs to sell. Costs of significant property improvements are capitalized, whereas costs relating to holding property are expensed. Valuations are periodically performed by management, and any subsequent write-downs are recorded as a charge to earnings, if necessary, to reduce the carrying value of the property to the lower of its cost or fair value less cost to sell. The Company had no foreclosed real estate at December 31, 2016 and 2015. At December 31, 2016 and 2015, the Company did not have any residential real estate loans in the process of foreclosure. Income Taxes Income taxes are provided for the tax effects of certain transactions reported in the consolidated financial statements. Income taxes consist of taxes currently due plus deferred taxes related primarily to temporary differences between the financial reporting and income tax basis of the allowance for loan losses, premises and equipment, certain state tax credits, and deferred loan origination costs. The deferred tax assets and liabilities represent the future tax return consequences of the temporary differences, which will either be taxable or deductible when the assets and liabilities are recovered or settled. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that some portion of the deferred tax assets will not be realized. Deferred tax assets and liabilities are reflected at income tax rates applicable to the period in which the deferred tax assets and liabilities are expected to be realized or settled. As changes in tax laws or rates are enacted, deferred tax assets and liabilities are adjusted through the provision for income taxes. Advertising Costs The Company follows the policy of charging the costs of advertising to expense as incurred. Off-Balance Sheet Financial Instruments In the ordinary course of business, the Company has entered into off-balance sheet financial instruments consisting of commitments to extend credit. Such financial instruments are recorded in the consolidated balance sheets when they are funded. Transfers of Financial Assets Transfers of financial assets are accounted for as sales, when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when (1) the assets have been isolated from the Company, (2) 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 (3) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity. Comprehensive Income (Loss) Accounting principles generally require that recognized revenue, expenses, gains, and losses be included in earnings. Although certain changes in assets and liabilities, such as unrealized gains and losses on available-for-sale securities, are reported as a separate component of the stockholders’ equity section of the consolidated balance sheets, such items, along with net income, are components of comprehensive income (loss). Accumulated other comprehensive gain (loss) represents the sum of these items, with the exception of net income, as of the balance sheet date and is represented in the table below. As of December 31, 2016 2015 Accumulated Other Comprehensive Loss By Component: Unrealized losses on securities available-for-sale $ (128) $ (6) Tax effect 43 2 Net unrealized losses on securities available-for-sale (85) (4) Unrealized losses on securities transferred to held-to-maturity - (323) Tax effect - 115 Net unrealized losses on securities transferred to held-to-maturity - (208) Accumulated other comprehensive loss $ (85) $ (212) Earnings Per Common Share Basic earnings per common share is calculated by dividing net income available to common stockholders by the weighted-average number of common shares outstanding during the period. Net income available to common stockholders is net income of the Company. The Company has not granted any restricted stock awards or stock options and, during the years ended December 31, 2016 and 2015, had no potentially dilutive common stock equivalents. Unallocated common shares held by the ESOP are not included in the weighted-average number of common shares outstanding for purposes of calculating basic earnings per common share until they are committed to be released. The average common shares outstanding were 1,901,023 Treasury Stock Treasury stock was recorded using the cost method and accordingly was presented as a reduction of stockholders’ equity. All treasury stock shares associated with our common stock have been cancelled as a result of the stock conversion and reorganization that occurred in July 2016. Reclassifications Amounts in the prior year’s consolidated financial statements have been reclassified whenever necessary to conform to the current year’s presentation. Such reclassifications had no impact on stockholders’ equity or net income as previously reported. New Accounting Pronouncements ASU 2017-01, Business Combinations (Topic 805), Clarifying the Definition of a Business Under the current implementation guidance in Topic 805, there are three elements of a business—inputs, processes, and outputs. While an integrated set of assets and activities (collectively referred to as a “set”) that is a business usually has outputs, outputs are not required to be present. In addition, all the inputs and processes that a seller uses in operating a set are not required if market participants can acquire the set and continue to produce outputs, for example, by integrating the acquired set with their own inputs and processes. The amendments in this Update provide a screen to determine when a set is not a business. The screen requires that when substantially all of the fair value of the gross assets acquired (or disposed of) is concentrated in a single identifiable asset or a group of similar identifiable assets, the set is not a business. This screen reduces the number of transactions that need to be further evaluated. If the screen is not met, the amendments in this Update (1) require that to be considered a business, a set must include, at a minimum, an input and a substantive process that together significantly contribute to the ability to create output and (2) remove the evaluation of whether a market participant could replace missing elements. The amendments provide a framework to assist entities in evaluating whether both an input and a substantive process are present. The framework includes two sets of criteria to consider that depend on whether a set has outputs. Although outputs are not required for a set to be a business, outputs generally are a key element of a business; therefore, the Board has developed more stringent criteria for sets without outputs. Lastly, the amendments in this Update narrow the definition of the term output The Company should apply the amendments in this Update to annual periods beginning after December 15, 2017, including interim periods within those periods. The amendments in this Update should be applied prospectively on or after the effective date. No disclosures are required at transition. ASU 2017-03, Accounting Changes and Error Corrections (Topic 250) and Investments-Equity Method and Joint Ventures (Topic 323), Amendments to SEC Paragraphs Pursuant to Staff Announcements at the September 22, 2016 and November 17, 2016 EITF Meetings ASU 2017-04, Intangibles-Goodwill and Other (Topic 350), Simplifying the Test for Goodwill Impairment Instead, under the amendments in this Update, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. Additionally, an entity should consider income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable. The Board also eliminated the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment and, if it fails that qualitative test, to perform Step 2 of the goodwill impairment test. Therefore, the same impairment assessment applies to all reporting units. An entity is required to disclose the amount of goodwill allocated to each reporting unit with a zero or negative carrying amount of net assets. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. This Update also includes amendments to the Overview and Background Sections of the Codification (as discussed in Part II of the amendments) as part of the Board’s initiative to unify and improve the Overview and Background Sections across Topics and Subtopics. These changes should not affect the related guidance in these Subtopics. An entity should apply the amendments in this Update on a prospective basis. An entity is required to disclose the nature of and reason for the change in accounting principle upon transition. That disclosure should be provided in the first annual period and in the interim period within the first annual period when the entity initially adopts the amendments in this Update. A public business entity that is a U.S. Securities and Exchange Commission (SEC) filer should adopt the amendments in this Update for its annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019. A public business entity that is not an SEC filer should adopt the amendments in this Update for its annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2020. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. Change in Accounting Estimate Due to a change in New York State tax law, mortgage recording tax expensed during the years ended December 31, 2016 and 2015 are now a refundable tax credit, at the election of the tax payer. Under New York law, a bank that paid special additional mortgage recording tax (“SAMRT”) on residential mortgages in any year beginning on or before January 1, 2015, may elect to treat the unused portion of the SAMRT credit on those mortgages as overpayment of tax to be carried forward or refunded. Previously, any unused credit was only eligible to be carried forward to future years. The Company made this election on December 20, 2016 and its impact was as follows: Income from continuing operations $627,000 Net income $464,000 Net income per share $0.24

Securities

Securities	12 Months Ended
	Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Note 2 - Securities The amortized cost and estimated fair value of securities with gross unrealized gains and losses at December 31, 2016 and 2015 are as follows: Amortized Gross Gross Fair December 31, 2016: (In Thousands) Available-for-Sale: U.S. Government and agency obligations $ 8,106 $ 3 $ (110 ) $ 7,999 Mortgage-backed securities - residential 9,769 42 (63 ) 9,748 $ 17,875 $ 45 $ (173 ) $ 17,747 Held-to-Maturity: Mortgage-backed securities - residential $ 745 $ 13 $ - $ 758 U.S. Government and agency obligations - - - - State and municipal securities 6,675 25 (74 ) 6,626 $ 7,420 $ 38 $ (74 ) $ 7,384 December 31, 2015: Available-for-Sale: U.S. Government and agency obligations $ 6,000 $ - $ (32 ) $ 5,968 Mortgage-backed securities - residential 13,974 101 (75 ) 14,000 $ 19,974 $ 101 $ (107 ) $ 19,968 Held-to-Maturity: Mortgage-backed securities - residential $ 1,535 $ 39 $ - $ 1,574 U.S. Government and agency obligations 6,793 129 - 6,922 State and municipal securities 4,651 76 (1 ) 4,726 $ 12,979 $ 244 $ (1 ) $ 13,222 Mortgage-backed securities consist of securities that are issued by Fannie Mae (“FNMA”), Freddie Mac (“FHLMC”), Ginnie Mae (“GNMA”), and are collateralized by residential mortgages. U.S. Government and agency obligations include notes and bonds with both fixed and variable rates. State and municipal securities consist of government obligation and revenue bonds. The amortized cost and estimated fair value by contractual maturity of debt securities at December 31, 2016 are shown below. Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations. Available-for-Sale Held-to-Maturity Amortized Estimated Amortized Estimated (In Thousands) Due in one year or less $ - $ - $ 755 $ 756 Due after one year through five years 6,106 6,022 3,643 3,637 Due after five years through ten years 1,000 1,003 2,277 2,233 Due after ten years 1,000 974 - - Mortgage-backed securities - residential 9,769 9,748 745 758 $ 17,875 $ 17,747 $ 7,420 $ 7,384 There were $24,000 of gross realized gains on sales of securities available-for-sale and $12,000 of gross realized gains on sales of securities held-to-maturity in 2016 resulting from proceeds of $2,606,000. There were $64,000 of gross realized gains on sales of securities available-for-sale and $42,000 of gross realized gains on sales of securities held-to-maturity in 2015 resulting from proceeds of $3,430,000. In accordance with accounting guidance, the Company was able to sell securities classified as held-to-maturity in 2016 and 2015 after the Company had already collected a substantial portion (at least 85%) of the principal outstanding at acquisition due either to prepayments or to scheduled principal and interest payments on debt securities. No securities were pledged to secure public deposits or for any other purpose required or permitted by law at December 31, 2016 and 2015. Management has reviewed its loan and mortgage-backed securities portfolios and determined that, to the best of its knowledge, little or no exposure exists to sub-prime or other high-risk residential mortgages. The Company is not in the practice of investing in, or originating, these types of investments or loans. The following table shows gross unrealized losses and fair value, aggregated by investment category and length of time the individual securities have been in a continuous unrealized loss position, at December 31, 2016 and 2015: Less than 12 Months 12 Months or More Total Fair Gross Fair Gross Fair Gross (In Thousands) 2016: Available-for-Sale U.S. Government and agency obligations $ 6,996 $ 110 $ - $ - $ 6,996 $ 110 Mortgage-backed securities - residential 4,441 49 987 14 5,428 63 $ 11,437 $ 159 $ 987 $ 14 $ 12,424 $ 173 2016: Held-to-Maturity Mortgage-backed securities - residential(1) $ 178 $ - $ - $ - $ 178 $ - State and municipal Securities(1) 4,275 74 45 - 4,320 74 $ 4,453 $ 74 $ 45 $ - $ 4,498 $ 74 2015: Available-for-Sale U.S. Government and agency obligations $ 5,968 $ 32 $ - $ - $ 5,968 $ 32 Mortgage-backed securities - residential 6,283 61 821 14 7,104 75 $ 12,251 $ 93 $ 821 $ 14 $ 13,072 $ 107 2015: Held-to-Maturity Mortgage-backed securities - residential(1) $ - $ - $ - $ - $ - $ - State and municipal Securities(1) 455 - 126 1 581 1 $ 455 $ - $ 126 $ 1 $ 581 $ 1 (1) Aggregate unrealized loss position of these securities is less than $500. Management evaluates securities for other-than-temporary impairment at least on a quarterly basis, and more frequently when economic or market concerns warrant such evaluation. In 2016 and 2015, the Company did not record an other-than-temporary impairment charge. At December 31, 2016, six U.S. Government and agency obligations, four residential mortgage-backed securities and 14 state and municipal securities were in a continuous unrealized loss position for less than twelve months. At December 31, 2016, two residential mortgage-backed securities and one state and municipal security were in a continuous unrealized loss position for more than twelve months. The debt securities and residential mortgage-backed securities were issued by U.S. Government sponsored agencies. All are paying in accordance with their terms with no deferrals of interest or defaults. Because the decline in fair value is attributable to changes in interest rates, not credit quality, and because management does not intend to sell and will not be required to sell these securities prior to recovery or maturity, no declines are deemed to be other-than-temporary. The state and municipal securities are general obligation (G.O.) bonds backed by the full faith and credit of local municipalities. There has never been a default of a New York G.O. in the history of the state. Historical performance does not guarantee future performance, but it does indicate that the risk of loss on default of a G.O. municipal bond for the Company is relatively low. All are paying in accordance with their terms and with no deferrals of interest or defaults. Because the decline in fair value is attributable to changes in interest rates, not credit quality, and because management does not intend to sell and will not be required to sell these securities prior to recovery or maturity, no declines are deemed to be other-than-temporary.

Loans and The Allowance for Loa

Loans and The Allowance for Loan Losses	12 Months Ended
	Dec. 31, 2016
Loans and Leases Receivable Disclosure [Abstract]
Loans and The Allowance for Loan Losses	Note 3 – Loans and The Allowance for Loan Losses Net loans at December 31, 2016 and 2015 consist of the following: 2016 2015 (In Thousands) Real estate loans: Secured by one- to four-family residences $188,573 $177,037 Secured by multi-family residences 5,103 5,146 Construction 6,134 1,251 Commercial real estate 8,440 3,522 Home equity lines of credit 16,797 14,523 Commercial & industrial 1,947 853 Other loans 75 61 Total Loans 227,069 202,393 Net deferred loan origination costs 113 248 Allowance for loan losses (990 ) (811 ) Net Loans $226,192 $201,830 To develop and document a systematic methodology for determining the allowance for loan losses, the Company has divided the loan portfolio into two portfolio segments, each with different risk characteristics but with similar methodologies for assessing risk. Each portfolio segment is broken down into loan classes where appropriate. Loan classes contain unique measurement attributes, risk characteristics, and methods for monitoring and assessing risk that are necessary to develop the allowance for loan losses. Unique characteristics such as borrower type, loan type, collateral type, and risk characteristics define each class. The following table illustrates the portfolio segments and classes for the Company’s loan portfolio: Portfolio Segment Class Real Estate Loans Secured by one-to-four family residences Secured by multi-family residences Construction Commercial real estate Home equity lines of credit Other Loans Commercial and industrial Other loans The Company’s primary lending activity is the origination of one- to four-family residential real estate mortgage loans. At December 31, 2016, $188.6 million, or 83.0%, of the total loan portfolio consisted of one- to four-family residential real estate mortgage loans compared to $177.0 million, or 87.5%, of the total loan portfolio at December 31, 2015. The Company offers home equity lines of credit, which are primarily secured by a second mortgage on one- to four-family residences. At December 31, 2016, home equity lines of credit totaled $16.8 million, or 7.4%, of total loans receivable compared to $14.5 million, or 7.2%, of total loans receivable at December 31, 2015. The underwriting standards for home equity lines of credit include a determination of the applicant’s credit history, an assessment of the applicant’s ability to meet existing obligations and payments on the proposed loan and the value of the collateral securing the loan. The combined loan-to-value ratio (first and second mortgage liens) for home equity lines of credit is generally limited to 90%. The Company originates home equity lines of credit without application fees or borrower-paid closing costs. Home equity lines of credit are offered with adjustable-rates of interest indexed to the prime rate, as reported in The Wall Street Journal Multi-family residential loans generally are secured by rental properties. Multi-family real estate loans are offered with fixed and adjustable interest rates. Loans secured by multi-family real estate totaled $5.1 million, or 2.2%, of the total loan portfolio at December 31, 2016 compared to $5.1 million, or 2.5%, of the total loan portfolio at December 31, 2015. Multi-family real estate loans are originated for terms of up to 20 years. Adjustable-rate multi-family real estate loans are tied to the average yield on U.S. Treasury securities, subject to periodic and lifetime limitations on interest rate changes. Loans secured by multi-family real estate generally involve a greater degree of credit risk than one- to four-family residential mortgage loans and carry larger loan balances. This increased credit risk is a result of several factors, including the concentration of principal in a limited number of loans and borrowers, the effects of general economic conditions on income producing properties, and the increased difficulty of evaluating and monitoring these types of loans. Furthermore, the repayment of loans secured by multi-family real estate typically depends upon the successful operation of the real estate property securing the loans. If the cash flow from the project is reduced, the borrower’s ability to repay the loan may be impaired. The Company originates construction loans for the purchase of developed lots and for the construction of single-family residences. At December 31, 2016, construction loans totaled $6.1 million, or 2.7%, of total loans receivable compared to $1.3 million, or 0.6%, at December 31, 2015. At December 31, 2016, the additional unadvanced portion of these construction loans totaled $5.0 million compared to $1.3 million at December 31, 2015. Construction loans are offered to individuals for the construction of their personal residences by a qualified builder (construction/permanent loans). Before making a commitment to fund a construction loan, the Company requires an appraisal of the property by an independent licensed appraiser. The Company generally also reviews and inspects each property before disbursement of funds during the term of the construction loan. Construction financing generally involves greater credit risk than long-term financing on improved, owner-occupied real estate. Risk of loss on a construction loan depends largely upon the accuracy of the initial estimate of the value of the property at completion of construction compared to the estimated cost (including interest) of construction and other assumptions. If the estimate of construction cost proves to be inaccurate, the Company may be required to advance additional funds beyond the amount originally committed in order to protect the value of the property. Moreover, if the estimated value of the completed project proves to be inaccurate, the borrower may hold a property with a value that is insufficient to assure full repayment of the loan. Commercial real estate loans are secured by office buildings, mixed use properties, places of worship and other commercial properties. Loans secured by commercial real estate totaled $8.4 million, or 3.7%, of the Company’s total loan portfolio at December 31, 2016 compared to $3.5 million, or 1.7%, of our total loan portfolio at December 31, 2015. The Company generally originates adjustable-rate commercial real estate loans with maximum terms of up to 15 years. The maximum loan-to-value ratio of commercial real estate loans is 80%. Loans secured by commercial real estate generally are larger than one- to four-family residential loans and involve greater credit risk. Commercial real estate loans often involve large loan balances to single borrowers or groups of related borrowers. Repayment of these loans depends to a large degree on the results of operations and management of the properties securing the loans or the businesses conducted on such property, and may be affected to a greater extent by adverse conditions in the real estate market or the economy in general. Accordingly, the nature of these loans makes them more difficult for management to monitor and evaluate. The commercial and industrial product set includes loans to individuals or businesses on an installment basis secured by vehicles, equipment or other durable goods for which the loans were made, loans for and secured by machinery and/or equipment for which a legitimate resale market exists, lines of credit to businesses and individuals, and unsecured loans to businesses and individuals on a short-term basis. At December 31, 2016, these loans totaled $1.9 million, or 0.9%, of the total loan portfolio compared to $853,000, or 0.4%, at December 31, 2015. These loans carry a higher risk than commercial real estate loans by the nature of the underlying collateral, which can be business assets such as equipment and accounts receivable. To reduce the risk, management also attempts to secure secondary collateral, such as real estate, and obtain personal guarantees of the borrowers. To further reduce risk and enhance liquidity, these loans generally carry variable rates of interest, repricing in five year periods, and have a maturity of ten years or less. In 2014, the Company applied and was approved as an SBA lender. SBA acts as a loan guarantor and these loans are generally for commercial business purposes versus real estate. The Company follows the Small Business Administration lending guidelines regarding eligibility, underwriting etc. as stated in SBA’s most current version of SOP 50 10 SBA’s Lender and Development Company Loan Program. The Company offers a variety of other loans secured by property other than real estate. At December 31, 2016, these other loans totaled $75,000, or 0.1%, of the total loan portfolio compared to other loans totaling $61,000, or 0.1%, of the total loan portfolio at December 31, 2015. These loans include automobile, passbook, overdraft protection and unsecured loans. Due to the relative immateriality of other loans, the Company’s risk associated with these loans is not considered significant. The following table sets forth the allowance for loan losses allocated by loan class and the activity in the allowance for loan losses for the years ending December 31, 2016 and 2015. The allowance for loan losses allocated to each class is not necessarily indicative of future losses in any particular class and does not restrict the use of the allowance to absorb losses in other classes. Secured by 1-4 family residential Secured by multi- family residential Construction Commercial Home Equity Lines of Credit Commercial & Industrial Other/ Unallocated Total (In Thousands) At December 31, 2016 Beginning Balance $524 $39 $6 $35 $101 $11 $95 $811 Charge Offs - - - - - - (1) (1) Recoveries - - - - - - - - Provisions 60 (1) 25 49 11 17 19 180 Ending Balance (1) $584 $38 $31 $84 $112 $28 $113 $990 At December 31, 2015 Beginning Balance $448 $29 $6 $14 $87 $1 $68 $653 Charge Offs - - - - - - - - Recoveries - - - - - - - - Provisions 76 10 - 21 14 10 27 158 Ending Balance (1) $524 $39 $6 $35 $101 $11 $95 $811 (1) All Loans are collectively evaluated for impairment. The Company’s policies, consistent with regulatory guidelines, provide for the classification of loans that are considered to be of lesser quality as substandard, doubtful, or loss assets. An asset is considered substandard if it is inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged, if any. Substandard assets include those assets characterized by the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected. Assets classified as doubtful have all of the weaknesses inherent in those classified as substandard with the added characteristic that the weaknesses present make collection or liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable. Assets (or portions of assets) classified as loss are those considered uncollectible and of such little value that their continuance as assets is not warranted. Assets that do not expose the Company to risk sufficient to warrant classification in one of the aforementioned categories, but which possess potential weaknesses that deserve close attention, are required to be designated as special mention. When the Company classifies assets as pass a portion of the related general loss allowances is allocated to such assets as deemed prudent. The allowance for loan losses is the amount estimated by management as necessary to absorb credit losses incurred in the loan portfolio that are both probable and reasonably estimable at the balance sheet date. The Company’s determination as to the classification of its assets and the amount of its loss allowances are subject to review by its principal state regulator, the New York State Department of Financial Services, which can require that the Company establish additional loss allowances. The Company regularly reviews its asset portfolio to determine whether any assets require classification in accordance with applicable regulations. At December 31, 2016 and 2015, there were no loans considered to be impaired and no troubled debt restructurings. The following table presents the risk category of loans by class at December 31, 2016 and 2015: Pass Special Substandard Doubtful Total 2016 (In Thousands) One- to four-family residential $ 187,079 $ - $ 1,494 $ - $ 188,573 Multi-family residential 5,103 - - - 5,103 Construction 6,134 - - - 6,134 Commercial real estate 8,440 - - - 8,440 Home equity lines of credit 16,498 - 299 - 16,797 Commercial & industrial 1,900 - 47 - 1,947 Other loans 75 - - - 75 Total $ 225,229 $ - $ 1,840 $ - $ 227,069 2015 One- to four-family residential $ 175,885 $ - $ 1,152 $ - $ 177,037 Multi-family residential 5,146 - - - 5,146 Construction 1,251 - - - 1,251 Commercial real estate 3,522 - - - 3,522 Home equity lines of credit 14,223 - 300 - 14,523 Commercial & industrial 853 - - - 853 Other loans 60 - - 1 61 Total $ 200,940 $ - $ 1,452 $ 1 $ 202,393 At December 31, 2016, the Company had no non-accrual loans and at December 31, 2015, the Company had one non-accrual residential mortgage loan for $63,000, one non-accrual home equity line of credit for $18,000, and one non-accrual checking line of credit for $1,000. There were no loans that were past due 90 days or more and still accruing interest at December 31, 2016 and 2015. Interest on non-accrual loans that would have been earned if loans were accruing interest was immaterial for 2015. Delinquent Loans 30-59 Days 60-89 Days Greater than Total Past Current Total Loans (In thousands) 2016 Real estate loans: One- to four-family residential $ 89 $ - $ - $ 89 $ 188,484 $ 188,573 Multi-family residential - - - - 5,103 5,103 Construction - - - - 6,134 6,134 Commercial - - - - 8,440 8,440 Home equity lines of credit - - - - 16,797 16,797 Commercial & industrial 47 - - 47 1,900 1,947 Other loans - - - - 75 75 Total $ 136 $ - $ - $ 136 $ 226,933 $ 227,069 2015 Real estate loans: One- to four-family residential $ 118 $ - $ 63 $ 181 $ 176,856 $ 177,037 Multi-family residential - - - - 5,146 5,146 Construction - - - - 1,251 1,251 Commercial - - - - 3,522 3,522 Home equity lines of credit - - 18 18 14,505 14,523 Commercial & industrial - - - - 853 853 Other loans 9 - 1 10 51 61 Total $ 127 $ - $ 82 $ 209 $ 202,184 $ 202,393 Management has reviewed its loan portfolio and determined that, to the best of its knowledge, no exposure exists to sub-prime or other high-risk residential mortgages. The Company is not in the practice of originating these types of loans.

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2016
Property, Plant and Equipment [Abstract]
Premises and Equipment	Note 4 - Premises and Equipment Premises and equipment at December 31, 2016 and 2015 are summarized as follows: 2016 2015 (In Thousands) Premises $4,355 $4,305 Furniture and equipment 3,628 2,803 7,983 7,108 Accumulated depreciation and amortization (4,808 ) (4,364 ) $3,175 $2,744 At December 31, 2016, the Company was obligated under non-cancelable operating leases for existing branches in Penfield, Irondequoit, Webster, and Perinton, New York and for four mortgage origination offices in Watertown, Pittsford, Greece, and Buffalo, New York. Rent expense under leases totaled $429,000 during 2016. Rent expense under the same non-cancelable operating leases, which includes the Canandaigua mortgage origination office which was terminated on December 31, 2015, totaled $418,000 during 2015. Future minimum rental payments under these leases for the next five years and thereafter are as follows (in thousands): Years ending December 31, 2017 $ 442 2018 433 2019 433 2020 390 2021 368 Thereafter 1,933 Total $ 3,999

Deposits

Deposits	12 Months Ended
	Dec. 31, 2016
Deposits [Abstract]
Deposits	Note 5 - Deposits The components of deposits at December 31, 2016 and 2015 consist of the following: 2016 2015 (In Thousands) Non-interest bearing $ 8,423 $ 6,974 NOW accounts 29,725 28,751 Regular savings, tax escrow and demand clubs 26,655 27,306 Money market 30,123 21,029 Individual retirement accounts 6,975 8,252 Certificates of deposit 81,033 93,249 $ 182,934 $ 185,561 As of December 31, 2016, individual retirement accounts and certificates of deposit have scheduled maturities as follows (in thousands): 2017 $ 63,383 2018 18,931 2019 1,947 2020 2,029 2021 1,718 $ 88,008 The aggregate amount of time deposits, each with a minimum denomination of $250,000 was $7,746,000 and $11,100,000 at December 31, 2016 and 2015, respectively. Under the Dodd-Frank Act, deposit insurance per account owner is $250,000. Interest expense on deposits for the years ended December 31, 2016 and 2015 is as follows: 2016 2015 (In Thousands) NOW accounts $ 74 $ 36 Regular savings and demand clubs 102 127 Money market 100 63 Individual retirement accounts 64 105 Certificates of deposit 1,096 921 $ 1,436 $ 1,252

Borrowings

Borrowings	12 Months Ended
	Dec. 31, 2016
Debt Disclosure [Abstract]
Borrowings	Note 6 - Borrowings Borrowings consist of advances from the Federal Home Loan Bank of New York (FHLB). The following table sets forth the contractual maturities of borrowings with the FHLB as of December 31: Advance Maturity Current 2016 2015 (In Thousands) 06/05/06 06/06/16 5.63 % - 1,000 04/25/12 04/25/17 1.03 % 128 433 08/16/12 08/16/17 1.00 % 306 711 09/05/12 09/05/19 1.13 % 829 1,115 11/06/12 11/06/17 0.86 % 407 810 11/27/12 11/27/17 1.12 % 1,000 1,000 12/19/12 12/19/19 1.20 % 902 1,187 12/27/12 12/27/16 0.97 % - 1,000 12/27/12 12/27/17 0.89 % 220 422 01/04/13 01/04/19 1.52 % 1,000 1,000 01/15/13 01/16/18 1.18 % 1,000 1,000 01/22/13 01/23/17 0.96 % 1,000 1,000 01/22/13 01/22/18 1.20 % 1,000 1,000 01/22/13 01/22/19 1.44 % 1,000 1,000 02/12/13 02/12/16 0.79 % - 1,500 02/20/13 02/21/20 1.28 % 475 618 02/20/13 02/21/23 1.77 % 646 742 07/02/13 07/02/18 1.35 % 682 1,083 07/22/13 07/23/18 1.27 % 681 1,083 09/19/13 09/19/18 1.37 % 375 575 09/19/13 09/16/16 1.14 % - 2,000 01/21/14 01/22/18 1.72 % 1,000 1,000 01/21/14 01/22/19 1.45 % 442 642 03/20/14 03/20/19 1.50 % 714 1,012 03/24/14 03/24/17 1.32 % 1,500 1,500 07/21/14 07/21/21 1.94 % 682 820 07/21/14 07/22/19 2.08 % 500 500 07/21/14 07/23/18 1.79 % 1,000 1,000 08/06/14 08/06/18 1.80 % 1,000 1,000 08/21/14 08/22/16 0.92 % - 1,000 08/21/14 08/21/19 2.12 % 1,000 1,000 10/02/14 10/04/21 2.00 % 1,434 1,709 10/15/14 10/15/21 1.69 % 715 853 11/28/14 11/29/21 1.90 % 1,455 1,730 12/31/14 12/31/19 1.63 % 626 823 12/31/14 01/02/18 1.52 % 1,000 1,000 01/14/15 01/14/20 1.73 % 1,500 1,500 01/21/15 01/21/20 1.79 % 500 500 01/21/15 01/21/21 1.97 % 500 500 04/13/15 04/13/20 1.74 % 1,000 1,000 05/20/15 05/20/20 1.52 % 708 903 05/20/15 05/20/22 1.91 % 796 933 06/25/15 06/25/20 1.65 % 725 920 06/25/15 06/26/17 1.14 % 1,000 1,000 Advance Maturity Current Rate 2016 2015 (In Thousands) 10/29/15 10/29/20 1.51 % 1,579 1,968 10/29/15 10/29/20 1.90 % 1,000 1,000 01/27/16 01/27/21 1.92 % 1,000 - 01/27/16 01/27/23 1.87 % 888 - 02/12/16 02/13/23 1.66 % 898 - 02/12/16 02/13/23 2.04 % 500 - 08/24/16 08/24/17 1.01 % 1,000 - 08/24/16 08/24/18 1.22 % 1,000 - 09/21/16 03/21/17 0.83 % 1,000 - 09/21/16 09/21/17 1.06 % 2,000 - 09/30/16 03/30/17 0.79 % 1,000 - 10/28/16 10/28/20 1.57 % 1,000 - 11/04/16 11/04/21 1.72 % 2,000 - 11/17/16 11/17/21 2.13 % 1,000 - 11/17/16 11/17/21 1.78 % 1,000 - 11/17/16 11/17/23 2.07 % 1,000 - 11/28/16 11/29/19 1.78 % 1,500 - 12/08/16 12/08/17 1.22 % 1,000 - 12/21/16 06/21/17 0.95 % 1,000 - 12/21/16 12/23/19 1.91 % 1,000 - 12/30/16 01/03/17 0.74 % 3,000 - $ 56,813 $ 46,092 Borrowings are secured by residential mortgages with a carrying amount of $165,546,000 at December 31, 2016 and the Company’s investment in FHLB stock. As of December 31, 2016, $90,868,000 was available for borrowings. At December 31, 2015, the carrying amount of borrowings secured by residential mortgages was $168,199,000 and $100,860,000 was available for new borrowings. The following table sets forth the contractual maturities of all FHLB borrowings at December 31, 2016 (dollars in thousands): Contractual Maturity Weighted Average Rate 2017 $ 15,562 0.98 % 2018 8,737 1.46 2019 9,513 1.62 2020 8,488 1.65 2021 9,785 1.88 Thereafter 4,728 2.27 $ 56,813 1.49 % The Company also has a repurchase agreement with Raymond James providing an additional $10 million in liquidity collateralized by the Company’s U.S. Government and agency obligations. There were no advances outstanding under the repurchase agreement at December 31, 2016 and 2015. Securities are not pledged until the borrowing is initiated.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Note 7 - Income Taxes The provision for income taxes for 2016 and 2015 consists of the following: 2016 2015 (In Thousands) Current Federal $ 439 $ 247 State 4 5 Deferred (115 ) (116 ) $ 328 $ 136 The Company’s effective tax rate was 26% and 21% in 2016 and 2015, respectively. The effective tax rate primarily reflects the impact of non-tax interest and dividends from tax exempt securities, as well as a partial release of a component of the deferred tax asset valuation allowance during 2016. Items that give rise to differences between income tax expense included in the consolidated statements of income and taxes computed by applying the statutory federal tax at a rate of 34% in 2016 or 2015 included the following (dollars in thousands): 2016 2015 Amount % of Pre-tax Income Amount % of Pre-tax Income Federal Tax at a Statutory rate $ 431 34 % $ 221 34 % State taxes, net of Federal provision 119 9 (223 ) (34 ) Change in valuation allowance (178 ) (14 ) 182 28 Nontaxable interest and dividend income (44 ) (3 ) (44 ) (7 ) Other items - - - - Income tax provision $ 328 26 % $ 136 21 % Deferred income tax assets and liabilities resulting from temporary differences are summarized as follows and are included in other assets at December 31, 2016 and at December 31, 2015 in the accompanying consolidated balance sheets: 2016 2015 (In Thousands) Deferred tax assets: Deferred loan origination fees $95 $43 Allowance for loan losses - Federal 379 314 State tax credits 1,102 1,381 Depreciation 64 81 Supplemental Executive Retirement Plan 290 226 Other-than-temporary impairment loss on securities - 22 Unrealized loss on securities available for sale and transferred to held to maturity 43 117 Net operating loss 159 - Other - 1 2,132 2,185 Valuation allowance (1,318 ) (1,507 ) Total deferred tax assets, net of valuation allowance 814 678 Deferred tax liabilities: Mortgage servicing rights (308 ) (217 ) Total deferred tax liabilities (308 ) (217 ) Net deferred tax asset $ 506 $ 461 The Company has recorded a valuation allowance for mortgage recording tax credits incurred before 2015 as well as state tax deductions since anticipated levels of future state taxable income makes it more likely than not that all of these tax benefits will not be used. Beginning in 2015, the New York State Special Additional Mortgage Recording Tax Credit became a refundable credit. To the extent that the credit exceeds the Company’s New York State tax liability, any remaining credit will be refunded to the Company. In addition, a valuation allowance in the amount of $88,000 was established in 2010 against a portion of the allowance for loan loss because future realization of the full tax benefit of that deferred tax asset was deemed to be unlikely. After fully utilizing its Federal Net Operating Loss (“NOL”) carryforward during 2013 and realizing increased and consistent current taxable income over the past 3 years, management determined that half (or $44,000) of that component of the valuation allowance should be reversed during 2015, with the remaining to be reversed in 2016. As a thrift institution, the Bank is subject to special provisions in the income tax laws regarding its allowable income tax bad debt deduction and related tax basis bad debt reserves. Deferred income tax liabilities are to be recognized with respect to any base-year reserves which are to become taxable (or "recaptured") in the foreseeable future. Under current income tax laws, the base-year reserves would be subject to recapture if the Company pays a cash dividend in excess of earnings and profits or liquidates. The Bank does not expect to take any actions in the foreseeable future that would require the recapture of any Federal reserves. As a result, a deferred tax liability has not been recognized with respect to the Federal base-year reserve of $1,518,000 at December 31, 2016 and 2015, because the Bank does not expect that this amount will become taxable in the foreseeable future. The unrecognized deferred tax liability with respect to the Federal base-year reserve was $516,000 at December 31, 2016 and 2015. It is more likely than not that this liability will never be incurred because, as noted above, the Bank does not expect to take any action in the future that would result in this liability being incurred. The Company's Federal and New York State tax returns, constituting the returns of the major taxing jurisdictions, are subject to examination by the taxing authorities for 2013, 2014, and 2015 as prescribed by applicable statute. No waivers have been executed that would extend the period subject to examination beyond the period prescribed by statute.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2016
Comprehensive Income Loss Note [Abstract]
Accumulated Other Comprehensive Loss	Note 8 – Accumulated Other Comprehensive Loss Changes in the components of accumulated other comprehensive loss (“AOCI”), net of tax, for the periods indicated are summarized in the table below, in thousands. Unrealized Gains and Losses on Available for Sales Securities Unrealized Losses on Securities Transferred to Held to Maturity Total Beginning balance $ (4 ) $ (208 ) $ (212 ) Other comprehensive (loss) income before reclassifications (57 ) 208 151 Amounts reclassified from AOCI (24 ) - (24 ) Ending balance $ (85 ) $ - $ (85 ) For the year ended December 31, 2015 Unrealized Gains and Losses on Available for Sales Securities Unrealized Losses on Securities Transferred to Held to Maturity Total Beginning balance $ 129 $ (355 ) $ (226 ) Other comprehensive (loss) income before reclassifications (63 ) 147 84 Amounts reclassified from AOCI (70 ) - (70 ) Ending balance $ (4 ) $ (208 ) $ (212 ) The following table presents the amounts reclassified out of each component of AOCI for the indicated annual period in thousands: For the year ended December 31, Details about AOCI 2016 2015 Affected Line Item in the Statement of Income Available for sale securities $ 24 $ 64 Realized gain on sale of securities Held to maturity securities 12 42 Realized gain on sale of securities (12 ) (36 ) Provision for Income Taxes $ 24 $ 70 Net Income

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2016
Compensation and Retirement Disclosure [Abstract]
Employee Benefit Plans	Note 9 - Employee Benefit Plans The Bank has a 401(k) plan for all eligible employees. Employees are eligible for participation in the 401(k) Plan after one year of service and attaining age 21. The 401(k) Plan allows employees to contribute 1% to 100% of their annual salary subject to statutory limitations. Matching contributions made by the Bank are 100% of the first 6% of compensation that an employee contributes to the 401(k) Plan. In addition, the Bank may make a discretionary contribution as a percentage of each eligible employee’s annual base compensation including the value of ESOP shares allocated. Matching contributions to the 401(k) Plan amounted to $189,000 and $174,000 for the years ended December 31, 2016 and 2015, respectively. Discretionary contributions to the 401(k) Plan were $77,000 and $72,000 for the years ended December 31, 2016 and 2015, respectively. The Bank sponsors an Employee Stock Ownership Plan (ESOP) for eligible employees who have attained age 21 and completed one year of employment. The cost of shares not committed to be released is presented in the accompanying consolidated balance sheets as a reduction of stockholders’ equity. Allocations to individual accounts are based on participant compensation. As shares are committed to be released to participants, the Company reports compensation expense equal to the current market price of the shares and the shares become outstanding for earnings per share computations. The difference between the market price and the cost of shares committed to be released is recorded as an adjustment to additional paid-in-capital. Any dividends on allocated shares reduce retained earnings. Any dividends on unallocated ESOP shares reduce debt and accrued interest. In connection with establishing the ESOP in 2007, the ESOP borrowed $700,000 from FSB Community to purchase 69,972 common shares of FSB Community’s stock. The loan is being repaid in twenty equal annual installments through 2026. The loan bears interest at the prime rate. Shares are released to participants on a straight line basis as the loan is repaid and totaled 3,498 shares for each of the years ended December 31, 2016 and December 31, 2015. Total expense for the ESOP was $44,000 and $35,000 for the years ended December 31, 2016 and 2015, respectively. At December 31, 2016, the Company had 34,986 unearned ESOP shares having an aggregate market value of $496,801. The Bank has a supplemental executive retirement plan (SERP) for two of its executives. All benefits provided under the SERP are unfunded and, as these executives retire, the Company will make payments to participants. The Company has recorded $759,000 and $621,000 at December 31, 2016 and 2015 respectively, for the SERP in other liabilities. In 2016 and 2015, the expense under the SERP totaled $138,000 and $125,000, respectively.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2016
Related Party Transactions [Abstract]
Related Party Transactions	Note 10 - Related Party Transactions Certain employees, executive officers and directors are engaged in transactions with the Bank in the ordinary course of business. It is the Bank’s policy that all related party transactions are conducted at “arms length” and all loans and commitments included in such transactions are made in the ordinary course of business, on substantially the same terms, including interest rates and collateral, as those prevailing at the time for comparable transactions with persons not related to the Bank and do not involve more than the normal risk of collectability or present other unfavorable terms. As of December 31, 2016 and 2015, loans outstanding with related parties were $596,000 and $168,000, respectively. During 2016, there were new loans of $651,000, sales of $166,000, and repayments totaled $57,000.

Commitments

Commitments	12 Months Ended
	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments	Note 11 - Commitments The Bank is a party to financial instruments with off-balance-sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit. These instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amounts recognized in the consolidated balance sheets. The Bank uses the same credit policies in making commitments and conditional obligations as it does for on-balance-sheet instruments. The Bank’s exposure to credit loss in the event of nonperformance by the other party to the financial instrument for commitments to extend credit is represented by the contractual amount of those instruments summarized as follows at December 31, 2016 and 2015: 2016 2015 (In Thousands) Commitments to extend credit: Commitments to grant loans $ 15,199 $ 10,415 Unadvanced portion of construction loans 5,009 1,338 Unfunded commitments under lines of credit 17,587 15,803 $ 37,795 $ 27,556 Commitments to grant loans at fixed-rates at December 31, 2016 totaled $10,802,000 and had interest rates that ranged from 3.00% to 5.00%. Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Bank evaluates each customer’s credit worthiness on a case-by-case basis. The amount and type of collateral obtained, if deemed necessary by the Bank upon extension of credit, varies and is based on management’s credit evaluation of the counterparty. In the ordinary course of business, the Bank sells residential mortgage loans to third parties and in certain limited situations, such as in the event of an early payment default, the Bank retains credit risk exposure on those residential mortgage loans and may be required to repurchase them or to indemnify guarantors for certain losses. The Bank may also be required to repurchase residential mortgage loans when representations and warranties made by the Bank in connection with those sales are breached. When a residential mortgage loan sold to an investor fails to perform according to its contractual terms, the investor will typically review the loan file to search for errors that may have been made in the process of originating the loan. If errors were discovered and it is determined that such errors constitute a breach of a representation or warranty made to the investor in connection with the Bank’s sale of the residential mortgage loan, the Bank will be required to either repurchase the loan or indemnify the investor for losses sustained. The bank has not been required to repurchase any residential mortgage loans or indemnify any investors for any such errors.

Regulatory Matters

Regulatory Matters	12 Months Ended
	Dec. 31, 2016
Banking and Thrift [Abstract]
Regulatory Matters	Note 12 - Regulatory Matters The Bank is subject to various regulatory capital requirements. Failure to meet minimum capital requirements can initiate certain mandatory, and possibly additional discretionary, actions by regulators that, if undertaken, could have a direct material effect on the Company’s consolidated financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Bank must meet specific guidelines that involve quantitative measures of the Bank’s assets, liabilities, and certain off-balance sheet items as calculated under regulatory accounting practices. The Bank’s capital amounts and classification are subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Quantitative measures established by regulation to ensure capital adequacy require the Bank to maintain minimum amounts and ratios (set forth in the table below) of total, Tier 1 capital (as defined), and Common Equity Tier 1 capital (as defined in the regulations) to risk-weighted assets (as defined), and of Tier 1 to adjusted total assets (as defined). Management believes that, as of December 31, 2016 and 2015, the Bank met all capital adequacy requirements to which it was subject. As of December 31, 2016, the most recent notification categorized the Bank as well capitalized under the regulatory framework for prompt corrective action. To be categorized as well capitalized the Bank must maintain minimum total risk-based, Tier 1 risk-based, Common Equity Tier 1 risk-based, and Tier 1 leverage ratios as set forth in the following table. There are no conditions or events since that notification that management believes have changed the Bank’s status as well capitalized. The Bank’s actual capital amounts and ratios are presented in the table below. Minimum To Be "Well- Minimum Capitalized" Well-Capitalized For Capital Under Prompt With Buffer, Fully Actual Adequacy Purposes Corrective Provisions Phased in for 2019 (Dollars in thousands) Amount Ratio Amount Ratio Amount Ratio Amount Ratio As of December 31, 2016 Total Core Capital (to Risk-Weighted Assets) $ 29,264 18.45 % ³ $12,689 ³ 8.0 % ³ $15,861 ³ 10.0 % ³ $16,654 ³ 10.5 % Tier 1 Capital (to Risk-Weighted Assets) 28,274 17.83 ³ 9,516 ³ 6.0 ³ 12,689 ³ 8.0 ³ 13,482 ³ 8.5 Tier 1 Common Equity (to Risk-Weighted Assets) 28,274 17.83 ³ 7,137 ³ 4.5 ³ 10,309 ³ 6.5 ³ 11,102 ³ 7.0 Tier 1 Capital (to Assets) 28,274 10.70 ³ 10,572 ³ 4.0 ³ 13,214 ³ 5.0 ³ 13,214 ³ 5.0 As of December 31, 2015: Total Core Capital (to Risk-Weighted Assets) $ 20,757 15.12 % ³ $10,980 ³ 8.0 % ³ $13,725 ³ 10.0 % Tier 1 Capital (to Risk-Weighted Assets) 19,946 14.53 ³ 8,235 ³ 6.0 ³ 10,980 ³ 8.0 Tier 1 Common Equity (to Risk-Weighted Assets) 19,946 14.53 ³ 6,176 ³ 4.5 ³ 8,921 ³ 6.5 Tier 1 Capital (to Assets) 19,946 7.85 ³ 10,167 ³ 4.0 ³ 12,709 ³ 5.0 The FRB has issued a policy guidance regarding the payment of dividends by bank holding companies. In general, the FRB’s policies provide that dividends should be paid only out of current earnings and only if the prospective rate of earnings retention by the holding company appears consistent with the organization’s capital needs, asset quality and overall financial condition. FRB guidance provides for prior regulatory review of capital distributions in certain circumstances such as where the company’s net income for the past four quarters, net of dividends previously paid over that period, is insufficient to fully fund the dividend or the company’s overall rate of earnings retention is inconsistent with the company’s capital needs and overall financial condition. The ability of a holding company to pay dividends may be restricted if a subsidiary bank becomes undercapitalized. These regulatory policies could affect the ability of FSB Bancorp to pay dividends or otherwise engage in capital distributions.

Fair Value Measurement and Fair

Fair Value Measurement and Fair Values of Financial Instruments	12 Months Ended
	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurement and Fair Values of Financial Instruments	Note 13 - Fair Value Measurement and Fair Values of Financial Instruments Management uses its best judgment in estimating the fair value of the Company’s assets and liabilities; however, there are inherent weaknesses in any estimation technique. Therefore, for substantially all assets and liabilities, the fair value estimates herein are not necessarily indicative of the amounts the Company could have realized in a sales transaction on the dates indicated. The estimated fair value amounts have been measured as of their respective year-ends and have not been re-evaluated or updated for purposes of these consolidated financial statements subsequent to those respective dates. As such, the estimated fair values of assets and liabilities subsequent to the respective reporting dates may be different than the amounts reported at each year-end. Accounting guidance establishes a fair value hierarchy that prioritizes the inputs to valuation methods used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are as follows: Level 1: Unadjusted quoted prices in active markets that are accessible at the measurement date for identical unrestricted assets or liabilities. Level 2: Quoted prices in markets that are not active, or inputs that are observable either directly or indirectly, for substantially the full term of the asset or liability. Level 3: Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable (i.e. supported with little or no market activity). An asset or liability’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. For financial assets measured at fair value on a recurring basis, the fair value measurements by level within the fair value hierarchy used are as follows at December 31: (In Thousands) 2016 Total Level 1 Level 2 Level 3 U.S. Government and agency obligations $ 7,999 $ - $ 7,999 $ - Mortgage-backed securities - residential 9,748 - 9,748 - Total Available-for-Sale Securities $ 17,747 $ - $ 17,747 $ - 2015 Total Level 1 Level 2 Level 3 U.S. Government and agency obligations $ 5,968 $ - $ 5,968 $ - Mortgage-backed securities - residential 14,000 - 14,000 - Total Available-for-Sale Securities $ 19,968 $ - $ 19,968 $ - There were no securities transferred out of level 2 securities available-for-sale during the twelve months ended December 31, 2016. No assets or liabilities have been measured on a non-recurring basis at December 31, 2016 or 2015. Required disclosures include fair value information about financial instruments, whether or not recognized in the consolidated balance sheets, for which it is practicable to estimate that value. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. In that regard, the fair value estimates cannot be substantiated by comparison to independent markets and, in many cases, could not be realized in immediate settlement of the instrument. Certain financial instruments and all non-financial instruments are excluded from the disclosure requirements. Accordingly, the aggregate fair value amounts presented do not represent the underlying value of the Company. Due to a wide range of valuation techniques and the degree of subjectivity used in making the estimates, comparisons between the Company’s disclosures and those of other companies may not be meaningful. The following methods and assumptions were used to estimate the fair values of certain of the Company’s assets and liabilities at December 31, 2016 and 2015. Cash, Due from Banks, and Interest-Earning Demand Deposits The carrying amounts of these assets approximate their fair values. Investment Securities The fair value of securities available-for-sale (carried at fair value) and held-to-maturity (carried at amortized cost) are determined by matrix pricing, which is a mathematical technique used widely in the industry to value debt securities without relying exclusively on quoted market prices for the specific securities but rather relying on the securities’ relationship to other benchmark quoted prices and is considered to be a Level 2 measurement. Investment in FHLB Stock The carrying value of FHLB stock approximates its fair value based on the redemption provisions of the FHLB stock, resulting in a Level 2 classification. Loans and Loans Held for Sale The fair values of loans held in portfolio are estimated using discounted cash flow analyses, using market rates at the balance sheet date that reflect the credit and interest rate-risk inherent in the loans, resulting in a Level 3 classification. Projected future cash flows are calculated based upon contractual maturity or call dates, projected repayments and prepayments of principal. Generally, for variable rate loans that reprice frequently and with no significant change in credit risk, fair values are based on carrying values. Mortgage loans held for sale in the secondary market are carried at the lower of cost or fair value, resulting in a Level 2 classification. Separate determinations of fair value for residential and commercial loans are made on an aggregate basis. Fair value is determined based solely on the effect of changes in secondary market interest rates and yield requirements from the commitment date to the date of the financial statements. Accrued Interest Receivable and Payable The carrying amount of accrued interest receivable and payable approximates fair value. Deposits The fair values disclosed for demand deposits (e.g., NOW accounts, non-interest checking, regular savings and certain types of money market accounts) are, by definition, equal to the amount payable on demand at the reporting date (i.e., their carrying amounts), resulting in a Level 1 classification. The carrying amounts for variable-rate certificates of deposit approximate their fair values at the reporting date, resulting in a Level 1 classification. Fair values for fixed-rate certificates of deposit are estimated using a discounted cash flow calculation that applies market interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities on time deposits, resulting in a Level 2 classification. Borrowings The fair values of FHLB long-term borrowings are estimated using discounted cash flow analyses, based on the quoted rates for new FHLB advances with similar credit risk characteristics, terms and remaining maturity, resulting in a Level 2 classification. The carrying amounts and estimated fair values of the Company’s financial instruments at December 31, 2016 and 2015 are as follows: 2016 2015 Fair Value Hierarchy Carrying Fair Carrying Fair (In Thousands) Financial assets: Cash and due from banks 1 $ 1,634 $ 1,634 $ 1,550 $ 1,550 Interest bearing demand deposits 1 5,773 5,773 4,597 4,597 Securities available for sale 2 17,747 17,747 19,968 19,968 Securities held to maturity 2 7,420 7,384 12,979 13,222 Investment in FHLB stock 2 2,886 2,886 2,388 2,388 Loans held for sale 2 2,059 2,059 3,880 3,880 Loans, net 3 226,192 225,569 201,830 201,886 Accrued interest receivable 1 652 652 655 655 Financial liabilities: Deposits 1/2 182,934 182,969 185,561 185,332 Borrowings 2 56,813 57,008 46,092 46,447 Accrued interest payable 1 71 71 60 60

FSB Bancorp, Inc. (Parent Compa

FSB Bancorp, Inc. (Parent Company Only) Financial Information	12 Months Ended
	Dec. 31, 2016
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
FSB Bancorp, Inc. (Parent Company Only) Financial Information	Note 14 - FSB Bancorp, Inc. (Parent Company Only) Financial Information Balance Sheets December 31 2016 2015 (In Thousands) Assets Cash and cash equivalents $ 2,881 $ 265 Securities available-for-sale - 1,000 Investment in banking subsidiary 28,610 20,085 ESOP loan receivable 398 431 Accrued interest receivable - 9 Total Assets $ 31,889 $ 21,790 Liabilities and Stockholders’ Equity Total Liabilities $ 30 $ 30 Stockholders’ Equity 31,859 21,760 Total Liabilities and Stockholders’ Equity $ 31,889 $ 21,790 Statements of Income Year Ended December 31 2016 2015 (In Thousands) Interest Income $ 20 $ 53 Other Expense (89 ) (37 ) Equity in undistributed earnings of banking subsidiary 1,007 497 Net Income $ 938 $ 513 Statements of Cash Flows Year Ended December 31 2016 2015 (In Thousands) Cash flows from operating activities Net income $ 938 $ 513 Adjustments to reconcile net income to net cash flows from operating activities Equity in undistributed earnings of banking subsidiary (1,007 ) (497 ) Decrease in accrued interest receivable 8 16 Net decrease in other liabilities - (16 ) Net cash flows from operating activities (61 ) 16 Cash flows from investing activities Proceeds to banking subsidiary (7,300 ) (1,938 ) Proceeds from maturities and calls of securities available-for-sale 1,000 1,938 Payments received on ESOP loan 33 32 Net cash flows from investing activities (6,267 ) 32 Cash flows from financing activities Proceeds from stock conversion and offering 8,944 - Net cash flows from financing activities 8,944 - Net increase in cash and cash equivalents 2,616 48 Cash and cash equivalents - beginning 265 217 Cash and cash equivalents - ending $ 2,881 $ 265

Nature of Operations and Summ23

Nature of Operations and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Organization and Nature of Operations	Organization and Nature of Operations On December 17, 2003, Fairport Savings Bank’s (the “Bank”) depositors approved a Plan of Reorganization (the “Plan”) from a Federal Mutual Savings Bank to a Federal Mutual Holding Company. Under the Plan, effective January 14, 2005, FSB Community Bankshares, MHC (the “Mutual Holding Company”) was incorporated under the laws of the United States as a mutual holding company. Also under the Plan, FSB Community Bankshares, Inc. (“FSB Community”) was incorporated and became a wholly-owned subsidiary of the Mutual Holding Company. In addition, effective January 14, 2005, the Bank completed its reorganization whereby the Bank converted to a stock savings bank and became a wholly-owned subsidiary of the Company. In August 2007, the Company completed its minority stock offering of 47% of the aggregate total voting stock of the Company. In connection with the minority stock offering, 1,785,000 shares of common stock were issued, of which 838,950 shares were sold, including 69,972 issued to the Company’s Employee Stock Ownership Plan (ESOP), at $10 per share raising net proceeds of $7.4 million. The stock was offered to the Bank’s eligible depositors, the Bank’s ESOP, and the public. Additionally, the Company issued 946,050 shares, or 53% of its common stock, to the Mutual Holding Company. On March 2, 2016, the Boards of Directors of the FSB Community Bankshares, Inc. (“FSB Community”), FSB Community Bankshares, MHC (the “M-H-C”), and Fairport Savings Bank (the “Bank”) unanimously adopted a Plan of Conversion of FSB Community Bankshares, MHC pursuant to which FSB Community Bankshares, MHC undertook a “second-step” conversion and now no longer exists. The Bank reorganized from a two-tier mutual holding company structure to a fully public stock holding company structure effective July 13, 2016, and, as a result is now the wholly-owned subsidiary of FSB Bancorp, Inc. (the “Company”). References to the Company prior to July 13, 2016 include FSB Community and not FSB Bancorp, whereas after July 13, 2016 references to the Company include FSB Bancorp and not FSB Community. FSB Bancorp, the new stock holding company for Fairport Savings Bank, sold 1,034,649 shares of common stock at $10.00 per share, for gross offering proceeds of $10.3 million in its stock offering. Additionally, after accounting for conversion related expenses of $1.4 million, which offset gross proceeds, the Company received $8.9 million in net proceeds. Concurrent with the completion of the conversion and reorganization, shares of common stock of FSB Community owned by public stockholders were exchanged for shares of the Company’s common stock so that the former public stockholders of FSB Community owned approximately the same percentage of the Company’s common stock as they owned of FSB Community’s common stock immediately prior to the conversion. Stockholders of FSB Community received 1.0884 shares of the Company’s common stock for each share of FSB Community’s stock they owned immediately prior to completion of the transaction. Cash in lieu of fractional shares was paid based on the offering price of $10.00 per share. All share and per share information in these financial statements for periods prior to the conversion have been revised to reflect the 1.0884:1 conversion ratio on shares outstanding, including shares held by FSB Community Bankshares, MHC that were not publicly traded. As a result of the offering and the exchange of shares, the Company has 1,941,688 shares outstanding as of December 31, 2016. On July 13, 2016, FSB Community Bankshares, MHC reorganized from a two-tier mutual holding company structure to a fully public stock holding company structure. In accordance with Board of Governors of the Federal Reserve System regulations, at the time of the reorganization, the Company substantially restricted retained earnings by establishing a liquidation account. The liquidation account will be maintained for the benefit of eligible account holders who continue to maintain their accounts at the Bank after conversion. The Bank has established a parallel liquidation account to support the Company’s liquidation account in the event the Company does not have sufficient assets to fund its obligations under its liquidation account. The liquidation accounts will be reduced annually to the extent that eligible account holders have reduced their qualifying deposits. Subsequent increases will not restore an eligible account holder’s interest in the liquidation accounts. In the event of a complete liquidation of the Bank or the Company, each account holder will be entitled to receive a distribution in an amount proportionate to the adjusted qualifying account balances then held. The Bank may not pay dividends if those dividends would reduce equity capital below the required liquidation account amount. The Company provides a variety of financial services to individuals and corporate customers through its wholly-owned subsidiary, Fairport Savings Bank. The Bank’s operations are conducted in five branches located in Monroe County, New York. The Company and the Bank are subject to the regulations of certain regulatory authorities and undergo periodic examinations by those regulatory authorities. The Company’s principal business consists of originating one-to-four-family residential real estate mortgages, home equity loans and lines of credit and to a lesser extent, originations of commercial real estate, multi-family, construction, commercial and industrial, and other consumer loans. The Company has four mortgage origination offices located in Pittsford, New York, Watertown, New York, Greece, New York, and Buffalo, New York. The Bank also provides non-deposit investment services to its customers through its wholly-owned subsidiary, Fairport Wealth Management. Previous to January 15, 2016, Fairport Wealth Management was known as Oakleaf Services Corporation. The results of operations of Fairport Wealth Management are not material to the consolidated financial statements.
Basis of Consolidation	Basis of Consolidation The consolidated financial statements include the accounts of the Company, the Bank and Fairport Wealth Management. All significant intercompany accounts and transactions have been eliminated in consolidation.
Use of Estimates	Use of Estimates The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) 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 consolidated financial statements and the reported amounts of revenue and expense during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant changes in the near term relate to the determination of the allowance for loan losses, deferred tax assets, and the estimation of fair values for accounting and disclosure purposes. The Company is subject to the regulations of various governmental agencies. The Company also undergoes periodic examinations by the regulatory agencies which may subject it to further changes with respect to asset valuations, amounts of required loss allowances, and operating restrictions resulting from the regulators’ judgements based on information available to them at the time of their examinations.
Significant Group Concentrations of Credit Risk	Significant Group Concentrations of Credit Risk Most of the Company’s activities are with customers located within Monroe, Livingston, Ontario, Orleans, Wayne, and Erie Counties, New York. Note 2 discusses the types of securities that the Company invests in. The concentration of credit by type of loan is set forth in Note 3. Although the Bank has a diversified loan portfolio, its debtors’ ability to honor their contracts is primarily dependent upon the real estate and general economic conditions in those areas.
Cash and Cash Equivalents	Cash and Cash Equivalents For purposes of the consolidated statements of cash flows, cash and cash equivalents include cash, balances due from banks and interest-earning demand deposits (with an original maturity of three months or less).
Securities	Securities The Company classifies investment securities as either available-for-sale or held-to-maturity. The Company does not hold any securities considered to be trading. Available-for-sale securities are reported at fair value, with net unrealized gains and losses reflected as a separate component of stockholders’ equity, net of the applicable income tax effect. Held-to-maturity securities are those that the Company has the ability and intent to hold until maturity and are reported at amortized cost. Gains or losses on investment security transactions are based on the amortized cost of the specific securities sold. Premiums and discounts on securities are amortized and accreted into income using the interest method over the period to maturity. When the fair value of a held-to-maturity or available-for-sale security is less than its amortized cost basis, an assessment is made at the balance sheet date as to whether other-than-temporary impairment (“OTTI”) is present. The Company considers numerous factors when determining whether potential OTTI exists and the period over which the debt security is expected to recover. The principal factors considered are (1) the length of time and the extent to which the fair value has been less than amortized cost basis, (2) the financial condition of the issuer (and guarantor, if any) and adverse conditions specifically related to the security industry or geographic area, (3) failure of the issuer of the security to make scheduled interest or principal payments, (4) any changes to the rating of a security by a rating agency, and (5) the presence of credit enhancements, if any, including the guarantee of the federal government or any of its agencies. For debt securities, OTTI is considered to have occurred if (1) the Company intends to sell the security, (2) it is more likely than not the Company will be required to sell the security before recovery of its amortized cost basis, or (3) if the present value of expected cash flows is not sufficient to recover the entire amortized cost basis or carrying value. For debt securities, credit-related OTTI is recognized in earnings while noncredit-related OTTI on securities not expected to be sold is recognized in other comprehensive income (loss). Credit-related OTTI is measured as the difference between the present value of an impaired security’s expected cash flows and its amortized cost basis or carrying value. Noncredit-related OTTI is measured as the difference between the fair value of the security and its amortized cost, or carrying value, less any credit-related losses recognized. For securities classified as held-to-maturity, the amount of OTTI recognized in other comprehensive income (loss) is accreted to the credit-adjusted expected cash flow amounts of the securities over future periods. Investment securities are exposed to various risks such as interest rate, market and credit risks. Due to the level of risk associated with certain investment securities, it is at least reasonably possible that changes in the values of investment securities will occur in the near term and that such changes could materially affect the amounts reported in the accompanying financial statements.
Federal Home Loan Bank of New York	Federal Home Loan Bank of New York Federal law requires a member institution of the Federal Home Loan Bank System to hold stock of its district Federal Home Loan Bank (“FHLB”) according to a predetermined formula. This restricted stock is carried at cost. Management’s determination of whether this investment is impaired is based on their assessment of the ultimate recoverability of its cost rather than by recognizing temporary declines in value. The determination of whether a decline affects the ultimate recoverability of cost is influenced by criteria such as (1) the significance of the decline in net assets of the FHLB as compared to the capital stock amount for the FHLB and the length of time this situation has persisted, (2) commitments by the FHLB to make payments required by law or regulation and the level of such payments in relation to the operating performance of the FHLB, and (3) the impact of legislative and regulatory changes on institutions and, accordingly, on the customer base of the FHLB. No impairment charges were recorded related to the FHLB stock during 2016 or 2015.
Loans Held for Sale	Loans Held for Sale Mortgage loans held for sale in the secondary market are carried at the lower of cost or fair value. Separate determinations of fair value for residential and commercial loans are made on an aggregate basis. Fair value is determined based solely on the effect of changes in secondary market interest rates and yield requirements from the commitment date to the date of the consolidated financial statements. Realized gains and losses on sales are computed using the specific identification method.
Loan Servicing Rights	Loan Servicing Rights The Company retains the servicing on most conventional fixed-rate mortgage loans sold and receives a fee based on the principal balance outstanding. Loans serviced for others totaled $118,565,000 and $85,858,000 at December 31, 2016 and 2015, respectively. The Company also sells correspondent FHA and VA mortgage loans, servicing released. Loan servicing rights are recorded at fair value when loans are sold with servicing rights retained. The fair value of the mortgage servicing rights (“MSRs”) is determined using a method which utilizes servicing income, discount rates, and prepayment speeds relative to the Bank’s portfolio for MSRs and are amortized over the life of the loan. MSRs amounted to $804,000 and $561,000 at December 31, 2016 and 2015, respectively, and are included in other assets on the consolidated balance sheets. In 2016, $268,000 was capitalized and $25,000 was amortized. In 2015, $227,000 was capitalized with $32,000 amortized.
Loans	Loans 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 net deferred origination fees and costs. 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 of the related loan yield using the interest method over the estimated life of the loan. The accrual of interest is generally discontinued when the contractual payment of principal or interest has become 90 days past due or management has serious doubts about further collectability of principal or interest, even though the loan is currently performing. A loan may remain on accrual status if it is in the process of collection and is well secured. When a loan is placed on nonaccrual status, unpaid interest credited to income in the current year is reversed. Interest received on nonaccrual loans generally is either applied against principal or reported as interest income, according to management’s judgment as to the collectability of principal. Generally, loans are restored to accrual status when the obligation is brought current, has performed in accordance with the contractual terms for a reasonable period of time and the ultimate collectability of the total contractual principal and interest is no longer in doubt.
Allowance for Loan Losses	Allowance for Loan Losses The allowance for loan losses (the “Allowance”) is established as losses are estimated to have occurred in the loan portfolio. The allowance for loan losses is recorded through a provision for loan losses charged to earnings. Loan losses are charged against the allowance when management believes the loan is uncollectable. Subsequent recoveries, if any, are credited to the allowance. The allowance for loan losses is evaluated on a regular basis by management and is based upon management’s periodic review of the collectability of the loans in light of historical experience, the nature and volume of the loan portfolio, adverse situations that may affect the borrower’s ability to repay, the estimated value of any underlying collateral and prevailing economic conditions. This evaluation is inherently subjective as it requires estimates that are susceptible to significant revision as more information becomes available. The allowance consists of specific, general and unallocated components. The specific component relates to loans that are deemed impaired and classified as either special mention, substandard, doubtful, or loss. For such loans that are also classified as impaired, an allowance is generally established when the collateral value of the impaired loan is lower than the carrying value of that loan. The general component covers non-classified loans and is based on historical loss experience adjusted for the following qualitative factors: effects of changes in lending policies; national and/or local economic trends and conditions; trends in volume and terms of loans; experience, ability, and depth of management; levels and trends of delinquencies, non-accruals and classified loans; quality of institutions loan review system; collateral value for collateral dependent loans; concentrations of credit; and competition, legal and regulatory requirements on level of estimated credit losses. An unallocated component is maintained to cover uncertainties that could affect management’s estimate of probable losses. The unallocated component of the allowance reflects the margin of imprecision inherent in the underlying assumptions used in the methodologies for estimating specific and general losses in the portfolio. 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 classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed. Impairment is measured on a loan by loan basis by either the present value of expected future cash flows discounted at the loan’s effective interest rate or the fair value of the collateral if the loan is collateral dependent. Large groups of smaller balance homogeneous loans are collectively evaluated for impairment. Accordingly, the Company does not separately identify individual consumer and residential loans for impairment disclosures unless subject to a troubled debt restructuring. In addition, Federal regulatory agencies, as an integral part of their examination process, periodically review the Company’s allowance for loan losses and may require the Company to recognize additions to the allowance based on their judgements about information available to them at the time of their examination, which may not be currently available to management. Based on management’s comprehensive analysis of the loan portfolio, management believes the current level of the allowance for loan losses is adequate.
Bank Owned Life Insurance	Bank Owned Life Insurance The Company holds life insurance policies on a key executive. Bank owned life insurance is recorded at the amount that can be realized under the insurance contract at the balance sheet date, which is the cash surrender value adjusted for other charges or other amounts due that are probable at settlement.
Premises and Equipment	Premises and Equipment Premises and equipment are stated at cost. Depreciation and amortization are computed on the straight-line basis over the shorter of the estimated useful lives or lease terms (in the case of leasehold improvements) of the related assets. Estimated useful lives are generally 20 to 30 years for premises and 3 to 10 years for furniture and equipment.
Foreclosed Real Estate	Foreclosed Real Estate Real estate properties acquired through, or in lieu of, loan foreclosure are initially recorded at fair value less estimated selling costs at the date of foreclosure. Any write-downs based on the asset’s fair value at date of acquisition are charged to the allowance for loan losses. After foreclosure, property held for sale is carried at the lower of the new basis or fair value less any costs to sell. Costs of significant property improvements are capitalized, whereas costs relating to holding property are expensed. Valuations are periodically performed by management, and any subsequent write-downs are recorded as a charge to earnings, if necessary, to reduce the carrying value of the property to the lower of its cost or fair value less cost to sell. The Company had no foreclosed real estate at December 31, 2016 and 2015. At December 31, 2016 and 2015, the Company did not have any residential real estate loans in the process of foreclosure.
Income Taxes	Income Taxes Income taxes are provided for the tax effects of certain transactions reported in the consolidated financial statements. Income taxes consist of taxes currently due plus deferred taxes related primarily to temporary differences between the financial reporting and income tax basis of the allowance for loan losses, premises and equipment, certain state tax credits, and deferred loan origination costs. The deferred tax assets and liabilities represent the future tax return consequences of the temporary differences, which will either be taxable or deductible when the assets and liabilities are recovered or settled. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that some portion of the deferred tax assets will not be realized. Deferred tax assets and liabilities are reflected at income tax rates applicable to the period in which the deferred tax assets and liabilities are expected to be realized or settled. As changes in tax laws or rates are enacted, deferred tax assets and liabilities are adjusted through the provision for income taxes.
Advertising Costs	Advertising Costs The Company follows the policy of charging the costs of advertising to expense as incurred.
Off-Balance Sheet Financial Instruments	Off-Balance Sheet Financial Instruments In the ordinary course of business, the Company has entered into off-balance sheet financial instruments consisting of commitments to extend credit. Such financial instruments are recorded in the consolidated balance sheets when they are funded.
Transfers of Financial Assets	Transfers of Financial Assets Transfers of financial assets are accounted for as sales, when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when (1) the assets have been isolated from the Company, (2) 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 (3) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity.
Comprehensive Income (Loss)	Comprehensive Income (Loss) Accounting principles generally require that recognized revenue, expenses, gains, and losses be included in earnings. Although certain changes in assets and liabilities, such as unrealized gains and losses on available-for-sale securities, are reported as a separate component of the stockholders’ equity section of the consolidated balance sheets, such items, along with net income, are components of comprehensive income (loss). Accumulated other comprehensive gain (loss) represents the sum of these items, with the exception of net income, as of the balance sheet date and is represented in the table below. As of December 31, 2016 2015 Accumulated Other Comprehensive Loss By Component: Unrealized losses on securities available-for-sale $ (128) $ (6) Tax effect 43 2 Net unrealized losses on securities available-for-sale (85) (4) Unrealized losses on securities transferred to held-to-maturity - (323) Tax effect - 115 Net unrealized losses on securities transferred to held-to-maturity - (208) Accumulated other comprehensive loss $ (85) $ (212)
Earnings Per Common Share	Earnings Per Common Share Basic earnings per common share is calculated by dividing net income available to common stockholders by the weighted-average number of common shares outstanding during the period. Net income available to common stockholders is net income of the Company. The Company has not granted any restricted stock awards or stock options and, during the years ended December 31, 2016 and 2015, had no potentially dilutive common stock equivalents. Unallocated common shares held by the ESOP are not included in the weighted-average number of common shares outstanding for purposes of calculating basic earnings per common share until they are committed to be released. The average common shares outstanding were 1,901,023
Treasury Stock	Treasury Stock Treasury stock was recorded using the cost method and accordingly was presented as a reduction of stockholders’ equity. All treasury stock shares associated with our common stock have been cancelled as a result of the stock conversion and reorganization that occurred in July 2016.
Reclassifications	Reclassifications Amounts in the prior year’s consolidated financial statements have been reclassified whenever necessary to conform to the current year’s presentation. Such reclassifications had no impact on stockholders’ equity or net income as previously reported.
New Accounting Pronouncements	New Accounting Pronouncements ASU 2017-01, Business Combinations (Topic 805), Clarifying the Definition of a Business Under the current implementation guidance in Topic 805, there are three elements of a business—inputs, processes, and outputs. While an integrated set of assets and activities (collectively referred to as a “set”) that is a business usually has outputs, outputs are not required to be present. In addition, all the inputs and processes that a seller uses in operating a set are not required if market participants can acquire the set and continue to produce outputs, for example, by integrating the acquired set with their own inputs and processes. The amendments in this Update provide a screen to determine when a set is not a business. The screen requires that when substantially all of the fair value of the gross assets acquired (or disposed of) is concentrated in a single identifiable asset or a group of similar identifiable assets, the set is not a business. This screen reduces the number of transactions that need to be further evaluated. If the screen is not met, the amendments in this Update (1) require that to be considered a business, a set must include, at a minimum, an input and a substantive process that together significantly contribute to the ability to create output and (2) remove the evaluation of whether a market participant could replace missing elements. The amendments provide a framework to assist entities in evaluating whether both an input and a substantive process are present. The framework includes two sets of criteria to consider that depend on whether a set has outputs. Although outputs are not required for a set to be a business, outputs generally are a key element of a business; therefore, the Board has developed more stringent criteria for sets without outputs. Lastly, the amendments in this Update narrow the definition of the term output The Company should apply the amendments in this Update to annual periods beginning after December 15, 2017, including interim periods within those periods. The amendments in this Update should be applied prospectively on or after the effective date. No disclosures are required at transition. ASU 2017-03, Accounting Changes and Error Corrections (Topic 250) and Investments-Equity Method and Joint Ventures (Topic 323), Amendments to SEC Paragraphs Pursuant to Staff Announcements at the September 22, 2016 and November 17, 2016 EITF Meetings ASU 2017-04, Intangibles-Goodwill and Other (Topic 350), Simplifying the Test for Goodwill Impairment Instead, under the amendments in this Update, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. Additionally, an entity should consider income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable. The Board also eliminated the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment and, if it fails that qualitative test, to perform Step 2 of the goodwill impairment test. Therefore, the same impairment assessment applies to all reporting units. An entity is required to disclose the amount of goodwill allocated to each reporting unit with a zero or negative carrying amount of net assets. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. This Update also includes amendments to the Overview and Background Sections of the Codification (as discussed in Part II of the amendments) as part of the Board’s initiative to unify and improve the Overview and Background Sections across Topics and Subtopics. These changes should not affect the related guidance in these Subtopics. An entity should apply the amendments in this Update on a prospective basis. An entity is required to disclose the nature of and reason for the change in accounting principle upon transition. That disclosure should be provided in the first annual period and in the interim period within the first annual period when the entity initially adopts the amendments in this Update. A public business entity that is a U.S. Securities and Exchange Commission (SEC) filer should adopt the amendments in this Update for its annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019. A public business entity that is not an SEC filer should adopt the amendments in this Update for its annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2020. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017.
Change in Accounting Estimate	Change in Accounting Estimate Due to a change in New York State tax law, mortgage recording tax expensed during the years ended December 31, 2016 and 2015 are now a refundable tax credit, at the election of the tax payer. Under New York law, a bank that paid special additional mortgage recording tax (“SAMRT”) on residential mortgages in any year beginning on or before January 1, 2015, may elect to treat the unused portion of the SAMRT credit on those mortgages as overpayment of tax to be carried forward or refunded. Previously, any unused credit was only eligible to be carried forward to future years. The Company made this election on December 20, 2016 and its impact was as follows: Income from continuing operations $627,000 Net income $464,000 Net income per share $0.24

Nature of Operations and Summ24

Nature of Operations and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Schedule of comprehensive income (loss)	As of December 31, 2016 2015 Accumulated Other Comprehensive Loss By Component: Unrealized losses on securities available-for-sale $ (128) $ (6) Tax effect 43 2 Net unrealized losses on securities available-for-sale (85) (4) Unrealized losses on securities transferred to held-to-maturity - (323) Tax effect - 115 Net unrealized losses on securities transferred to held-to-maturity - (208) Accumulated other comprehensive loss $ (85) $ (212)
Schedule of change in accounting estimate	Income from continuing operations $627,000 Net income $464,000 Net income per share $0.24

Securities (Tables)

Securities (Tables)	12 Months Ended
	Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Schedule of amortized cost and estimated fair value of securities	Amortized Gross Gross Fair December 31, 2016: (In Thousands) Available-for-Sale: U.S. Government and agency obligations $ 8,106 $ 3 $ (110 ) $ 7,999 Mortgage-backed securities - residential 9,769 42 (63 ) 9,748 $ 17,875 $ 45 $ (173 ) $ 17,747 Held-to-Maturity: Mortgage-backed securities - residential $ 745 $ 13 $ - $ 758 U.S. Government and agency obligations - - - - State and municipal securities 6,675 25 (74 ) 6,626 $ 7,420 $ 38 $ (74 ) $ 7,384 December 31, 2015: Available-for-Sale: U.S. Government and agency obligations $ 6,000 $ - $ (32 ) $ 5,968 Mortgage-backed securities - residential 13,974 101 (75 ) 14,000 $ 19,974 $ 101 $ (107 ) $ 19,968 Held-to-Maturity: Mortgage-backed securities - residential $ 1,535 $ 39 $ - $ 1,574 U.S. Government and agency obligations 6,793 129 - 6,922 State and municipal securities 4,651 76 (1 ) 4,726 $ 12,979 $ 244 $ (1 ) $ 13,222
Schedule of amortized cost and estimated fair value by contractual maturity of debt securities	Available-for-Sale Held-to-Maturity Amortized Estimated Amortized Estimated (In Thousands) Due in one year or less $ - $ - $ 755 $ 756 Due after one year through five years 6,106 6,022 3,643 3,637 Due after five years through ten years 1,000 1,003 2,277 2,233 Due after ten years 1,000 974 - - Mortgage-backed securities - residential 9,769 9,748 745 758 $ 17,875 $ 17,747 $ 7,420 $ 7,384
Schedule of continuous unrealized loss position for investment securities	Less than 12 Months 12 Months or More Total Fair Gross Fair Gross Fair Gross (In Thousands) 2016: Available-for-Sale U.S. Government and agency obligations $ 6,996 $ 110 $ - $ - $ 6,996 $ 110 Mortgage-backed securities - residential 4,441 49 987 14 5,428 63 $ 11,437 $ 159 $ 987 $ 14 $ 12,424 $ 173 2016: Held-to-Maturity Mortgage-backed securities - residential(1) $ 178 $ - $ - $ - $ 178 $ - State and municipal Securities(1) 4,275 74 45 - 4,320 74 $ 4,453 $ 74 $ 45 $ - $ 4,498 $ 74 2015: Available-for-Sale U.S. Government and agency obligations $ 5,968 $ 32 $ - $ - $ 5,968 $ 32 Mortgage-backed securities - residential 6,283 61 821 14 7,104 75 $ 12,251 $ 93 $ 821 $ 14 $ 13,072 $ 107 2015: Held-to-Maturity Mortgage-backed securities - residential(1) $ - $ - $ - $ - $ - $ - State and municipal Securities(1) 455 - 126 1 581 1 $ 455 $ - $ 126 $ 1 $ 581 $ 1 (1) Aggregate unrealized loss position of these securities is less than $500.

Loans (Tables)

Loans (Tables)	12 Months Ended
	Dec. 31, 2016
Loans and Leases Receivable Disclosure [Abstract]
Schedule of net loans	2016 2015 (In Thousands) Real estate loans: Secured by one- to four-family residences $188,573 $177,037 Secured by multi-family residences 5,103 5,146 Construction 6,134 1,251 Commercial real estate 8,440 3,522 Home equity lines of credit 16,797 14,523 Commercial & industrial 1,947 853 Other loans 75 61 Total Loans 227,069 202,393 Net deferred loan origination costs 113 248 Allowance for loan losses (990 ) (811 ) Net Loans $226,192 $201,830
Schedule of changes in the allowance for loan losses	Secured by 1-4 family residential Secured by multi- family residential Construction Commercial Home Equity Lines of Credit Commercial & Industrial Other/ Unallocated Total (In Thousands) At December 31, 2016 Beginning Balance $524 $39 $6 $35 $101 $11 $95 $811 Charge Offs - - - - - - (1) (1) Recoveries - - - - - - - - Provisions 60 (1) 25 49 11 17 19 180 Ending Balance (1) $584 $38 $31 $84 $112 $28 $113 $990 At December 31, 2015 Beginning Balance $448 $29 $6 $14 $87 $1 $68 $653 Charge Offs - - - - - - - - Recoveries - - - - - - - - Provisions 76 10 - 21 14 10 27 158 Ending Balance (1) $524 $39 $6 $35 $101 $11 $95 $811 (1) All Loans are collectively evaluated for impairment.
Schedule of risk category of loans by class	Pass Special Substandard Doubtful Total 2016 (In Thousands) One- to four-family residential $ 187,079 $ - $ 1,494 $ - $ 188,573 Multi-family residential 5,103 - - - 5,103 Construction 6,134 - - - 6,134 Commercial real estate 8,440 - - - 8,440 Home equity lines of credit 16,498 - 299 - 16,797 Commercial & industrial 1,900 - 47 - 1,947 Other loans 75 - - - 75 Total $ 225,229 $ - $ 1,840 $ - $ 227,069 2015 One- to four-family residential $ 175,885 $ - $ 1,152 $ - $ 177,037 Multi-family residential 5,146 - - - 5,146 Construction 1,251 - - - 1,251 Commercial real estate 3,522 - - - 3,522 Home equity lines of credit 14,223 - 300 - 14,523 Commercial & industrial 853 - - - 853 Other loans 60 - - 1 61 Total $ 200,940 $ - $ 1,452 $ 1 $ 202,393
Schedule of age of the loan delinquencies by type and by amount past due	30-59 Days 60-89 Days Greater than Total Past Current Total Loans (In thousands) 2016 Real estate loans: One- to four-family residential $ 89 $ - $ - $ 89 $ 188,484 $ 188,573 Multi-family residential - - - - 5,103 5,103 Construction - - - - 6,134 6,134 Commercial - - - - 8,440 8,440 Home equity lines of credit - - - - 16,797 16,797 Commercial & industrial 47 - - 47 1,900 1,947 Other loans - - - - 75 75 Total $ 136 $ - $ - $ 136 $ 226,933 $ 227,069 2015 Real estate loans: One- to four-family residential $ 118 $ - $ 63 $ 181 $ 176,856 $ 177,037 Multi-family residential - - - - 5,146 5,146 Construction - - - - 1,251 1,251 Commercial - - - - 3,522 3,522 Home equity lines of credit - - 18 18 14,505 14,523 Commercial & industrial - - - - 853 853 Other loans 9 - 1 10 51 61 Total $ 127 $ - $ 82 $ 209 $ 202,184 $ 202,393

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2016
Property, Plant and Equipment [Abstract]
Schedule of premises and equipment	2016 2015 (In Thousands) Premises $4,355 $4,305 Furniture and equipment 3,628 2,803 7,983 7,108 Accumulated depreciation and amortization (4,808 ) (4,364 ) $3,175 $2,744
Schedule of future minimum rental payments under these leases	Years ending December 31, 2017 $ 442 2018 433 2019 433 2020 390 2021 368 Thereafter 1,933 Total $ 3,999

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2016
Deposits [Abstract]
Schedule of components of deposits	2016 2015 (In Thousands) Non-interest bearing $ 8,423 $ 6,974 NOW accounts 29,725 28,751 Regular savings, tax escrow and demand clubs 26,655 27,306 Money market 30,123 21,029 Individual retirement accounts 6,975 8,252 Certificates of deposit 81,033 93,249 $ 182,934 $ 185,561
Schedule of certificates of deposit have scheduled maturities	2017 $ 63,383 2018 18,931 2019 1,947 2020 2,029 2021 1,718 $ 88,008
Schedule of interest expense on deposits	2016 2015 (In Thousands) NOW accounts $ 74 $ 36 Regular savings and demand clubs 102 127 Money market 100 63 Individual retirement accounts 64 105 Certificates of deposit 1,096 921 $ 1,436 $ 1,252

Borrowings (Tables)

Borrowings (Tables)	12 Months Ended
	Dec. 31, 2016
Debt Disclosure [Abstract]
Schedule of contractual maturities of borrowings	Advance Maturity Current 2016 2015 (In Thousands) 06/05/06 06/06/16 5.63 % - 1,000 04/25/12 04/25/17 1.03 % 128 433 08/16/12 08/16/17 1.00 % 306 711 09/05/12 09/05/19 1.13 % 829 1,115 11/06/12 11/06/17 0.86 % 407 810 11/27/12 11/27/17 1.12 % 1,000 1,000 12/19/12 12/19/19 1.20 % 902 1,187 12/27/12 12/27/16 0.97 % - 1,000 12/27/12 12/27/17 0.89 % 220 422 01/04/13 01/04/19 1.52 % 1,000 1,000 01/15/13 01/16/18 1.18 % 1,000 1,000 01/22/13 01/23/17 0.96 % 1,000 1,000 01/22/13 01/22/18 1.20 % 1,000 1,000 01/22/13 01/22/19 1.44 % 1,000 1,000 02/12/13 02/12/16 0.79 % - 1,500 02/20/13 02/21/20 1.28 % 475 618 02/20/13 02/21/23 1.77 % 646 742 07/02/13 07/02/18 1.35 % 682 1,083 07/22/13 07/23/18 1.27 % 681 1,083 09/19/13 09/19/18 1.37 % 375 575 09/19/13 09/16/16 1.14 % - 2,000 01/21/14 01/22/18 1.72 % 1,000 1,000 01/21/14 01/22/19 1.45 % 442 642 03/20/14 03/20/19 1.50 % 714 1,012 03/24/14 03/24/17 1.32 % 1,500 1,500 07/21/14 07/21/21 1.94 % 682 820 07/21/14 07/22/19 2.08 % 500 500 07/21/14 07/23/18 1.79 % 1,000 1,000 08/06/14 08/06/18 1.80 % 1,000 1,000 08/21/14 08/22/16 0.92 % - 1,000 08/21/14 08/21/19 2.12 % 1,000 1,000 10/02/14 10/04/21 2.00 % 1,434 1,709 10/15/14 10/15/21 1.69 % 715 853 11/28/14 11/29/21 1.90 % 1,455 1,730 12/31/14 12/31/19 1.63 % 626 823 12/31/14 01/02/18 1.52 % 1,000 1,000 01/14/15 01/14/20 1.73 % 1,500 1,500 01/21/15 01/21/20 1.79 % 500 500 01/21/15 01/21/21 1.97 % 500 500 04/13/15 04/13/20 1.74 % 1,000 1,000 05/20/15 05/20/20 1.52 % 708 903 05/20/15 05/20/22 1.91 % 796 933 06/25/15 06/25/20 1.65 % 725 920 06/25/15 06/26/17 1.14 % 1,000 1,000 Advance Maturity Current Rate 2016 2015 (In Thousands) 10/29/15 10/29/20 1.51 % 1,579 1,968 10/29/15 10/29/20 1.90 % 1,000 1,000 01/27/16 01/27/21 1.92 % 1,000 - 01/27/16 01/27/23 1.87 % 888 - 02/12/16 02/13/23 1.66 % 898 - 02/12/16 02/13/23 2.04 % 500 - 08/24/16 08/24/17 1.01 % 1,000 - 08/24/16 08/24/18 1.22 % 1,000 - 09/21/16 03/21/17 0.83 % 1,000 - 09/21/16 09/21/17 1.06 % 2,000 - 09/30/16 03/30/17 0.79 % 1,000 - 10/28/16 10/28/20 1.57 % 1,000 - 11/04/16 11/04/21 1.72 % 2,000 - 11/17/16 11/17/21 2.13 % 1,000 - 11/17/16 11/17/21 1.78 % 1,000 - 11/17/16 11/17/23 2.07 % 1,000 - 11/28/16 11/29/19 1.78 % 1,500 - 12/08/16 12/08/17 1.22 % 1,000 - 12/21/16 06/21/17 0.95 % 1,000 - 12/21/16 12/23/19 1.91 % 1,000 - 12/30/16 01/03/17 0.74 % 3,000 - $ 56,813 $ 46,092
Schedule of contractual maturities of all FHLB borrowings	Contractual Maturity Weighted Average Rate 2017 $ 15,562 0.98 % 2018 8,737 1.46 2019 9,513 1.62 2020 8,488 1.65 2021 9,785 1.88 Thereafter 4,728 2.27 $ 56,813 1.49 %

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Schedule of provision for income taxes	2016 2015 (In Thousands) Current Federal $ 439 $ 247 State 4 5 Deferred (115 ) (116 ) $ 328 $ 136
Schedule of reconciliation of the expected federal statutory tax to the income tax provision	2016 2015 Amount % of Pre-tax Income Amount % of Pre-tax Income Federal Tax at a Statutory rate $ 431 34 % $ 221 34 % State taxes, net of Federal provision 119 9 (223 ) (34 ) Change in valuation allowance (178 ) (14 ) 182 28 Nontaxable interest and dividend income (44 ) (3 ) (44 ) (7 ) Other items - - - - Income tax provision $ 328 26 % $ 136 21 %
Schedule of components of net deferred tax assets	2016 2015 (In Thousands) Deferred tax assets: Deferred loan origination fees $95 $43 Allowance for loan losses - Federal 379 314 State tax credits 1,102 1,381 Depreciation 64 81 Supplemental Executive Retirement Plan 290 226 Other-than-temporary impairment loss on securities - 22 Unrealized loss on securities available for sale and transferred to held to maturity 43 117 Net operating loss 159 - Other - 1 2,132 2,185 Valuation allowance (1,318 ) (1,507 ) Total deferred tax assets, net of valuation allowance 814 678 Deferred tax liabilities: Mortgage servicing rights (308 ) (217 ) Total deferred tax liabilities (308 ) (217 ) Net deferred tax asset $ 506 $ 461

Accumulated Other Comprehensi31

Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2016
Comprehensive Income Loss Note [Abstract]
Schedule of accumulated other comprehensive income (loss)	Unrealized Gains and Losses on Available for Sales Securities Unrealized Losses on Securities Transferred to Held to Maturity Total Beginning balance $ (4 ) $ (208 ) $ (212 ) Other comprehensive (loss) income before reclassifications (57 ) 208 151 Amounts reclassified from AOCI (24 ) - (24 ) Ending balance $ (85 ) $ - $ (85 ) For the year ended December 31, 2015 Unrealized Gains and Losses on Available for Sales Securities Unrealized Losses on Securities Transferred to Held to Maturity Total Beginning balance $ 129 $ (355 ) $ (226 ) Other comprehensive (loss) income before reclassifications (63 ) 147 84 Amounts reclassified from AOCI (70 ) - (70 ) Ending balance $ (4 ) $ (208 ) $ (212 )
Schedule of amounts reclassified out of each component	For the year ended December 31, Details about AOCI 2016 2015 Affected Line Item in the Statement of Income Available for sale securities $ 24 $ 64 Realized gain on sale of securities Held to maturity securities 12 42 Realized gain on sale of securities (12 ) (36 ) Provision for Income Taxes $ 24 $ 70 Net Income

Commitments (Tables)

Commitments (Tables)	12 Months Ended
	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Schedule of commitments	2016 2015 (In Thousands) Commitments to extend credit: Commitments to grant loans $ 15,199 $ 10,415 Unadvanced portion of construction loans 5,009 1,338 Unfunded commitments under lines of credit 17,587 15,803 $ 37,795 $ 27,556

Regulatory Matters (Tables)

Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2016
Banking and Thrift [Abstract]
Schedule of capital amounts and ratios	Minimum To Be "Well- Minimum Capitalized" Well-Capitalized For Capital Under Prompt With Buffer, Fully Actual Adequacy Purposes Corrective Provisions Phased in for 2019 (Dollars in thousands) Amount Ratio Amount Ratio Amount Ratio Amount Ratio As of December 31, 2016 Total Core Capital (to Risk-Weighted Assets) $ 29,264 18.45 % ³ $12,689 ³ 8.0 % ³ $15,861 ³ 10.0 % ³ $16,654 ³ 10.5 % Tier 1 Capital (to Risk-Weighted Assets) 28,274 17.83 ³ 9,516 ³ 6.0 ³ 12,689 ³ 8.0 ³ 13,482 ³ 8.5 Tier 1 Common Equity (to Risk-Weighted Assets) 28,274 17.83 ³ 7,137 ³ 4.5 ³ 10,309 ³ 6.5 ³ 11,102 ³ 7.0 Tier 1 Capital (to Assets) 28,274 10.70 ³ 10,572 ³ 4.0 ³ 13,214 ³ 5.0 ³ 13,214 ³ 5.0 As of December 31, 2015: Total Core Capital (to Risk-Weighted Assets) $ 20,757 15.12 % ³ $10,980 ³ 8.0 % ³ $13,725 ³ 10.0 % Tier 1 Capital (to Risk-Weighted Assets) 19,946 14.53 ³ 8,235 ³ 6.0 ³ 10,980 ³ 8.0 Tier 1 Common Equity (to Risk-Weighted Assets) 19,946 14.53 ³ 6,176 ³ 4.5 ³ 8,921 ³ 6.5 Tier 1 Capital (to Assets) 19,946 7.85 ³ 10,167 ³ 4.0 ³ 12,709 ³ 5.0

Fair Value Measurement and Fa34

Fair Value Measurement and Fair Values of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Schedule of assets measured at fair value on a recurring basis	(In Thousands) 2016 Total Level 1 Level 2 Level 3 U.S. Government and agency obligations $ 7,999 $ - $ 7,999 $ - Mortgage-backed securities - residential 9,748 - 9,748 - Total Available-for-Sale Securities $ 17,747 $ - $ 17,747 $ - 2015 Total Level 1 Level 2 Level 3 U.S. Government and agency obligations $ 5,968 $ - $ 5,968 $ - Mortgage-backed securities - residential 14,000 - 14,000 - Total Available-for-Sale Securities $ 19,968 $ - $ 19,968 $ -
Schedule of carrying amounts and estimated fair values of the financial instruments	2016 2015 Fair Value Hierarchy Carrying Fair Carrying Fair (In Thousands) Financial assets: Cash and due from banks 1 $ 1,634 $ 1,634 $ 1,550 $ 1,550 Interest bearing demand deposits 1 5,773 5,773 4,597 4,597 Securities available for sale 2 17,747 17,747 19,968 19,968 Securities held to maturity 2 7,420 7,384 12,979 13,222 Investment in FHLB stock 2 2,886 2,886 2,388 2,388 Loans held for sale 2 2,059 2,059 3,880 3,880 Loans, net 3 226,192 225,569 201,830 201,886 Accrued interest receivable 1 652 652 655 655 Financial liabilities: Deposits 1/2 182,934 182,969 185,561 185,332 Borrowings 2 56,813 57,008 46,092 46,447 Accrued interest payable 1 71 71 60 60

FSB Bancorp, Inc. (Parent Com35

FSB Bancorp, Inc. (Parent Company Only) Financial Information (Tables)	12 Months Ended
	Dec. 31, 2016
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Schedule of Balance Sheets	Balance Sheets December 31 2016 2015 (In Thousands) Assets Cash and cash equivalents $ 2,881 $ 265 Securities available-for-sale - 1,000 Investment in banking subsidiary 28,610 20,085 ESOP loan receivable 398 431 Accrued interest receivable - 9 Total Assets $ 31,889 $ 21,790 Liabilities and Stockholders’ Equity Total Liabilities $ 30 $ 30 Stockholders’ Equity 31,859 21,760 Total Liabilities and Stockholders’ Equity $ 31,889 $ 21,790
Schedule of Statements of Income	Statements of Income Year Ended December 31 2016 2015 (In Thousands) Interest Income $ 20 $ 53 Other Expense (89 ) (37 ) Equity in undistributed earnings of banking subsidiary 1,007 497 Net Income $ 938 $ 513
Schedule of Statements of Cash Flows	Statements of Cash Flows Year Ended December 31 2016 2015 (In Thousands) Cash flows from operating activities Net income $ 938 $ 513 Adjustments to reconcile net income to net cash flows from operating activities Equity in undistributed earnings of banking subsidiary (1,007 ) (497 ) Decrease in accrued interest receivable 8 16 Net decrease in other liabilities - (16 ) Net cash flows from operating activities (61 ) 16 Cash flows from investing activities Proceeds to banking subsidiary (7,300 ) (1,938 ) Proceeds from maturities and calls of securities available-for-sale 1,000 1,938 Payments received on ESOP loan 33 32 Net cash flows from investing activities (6,267 ) 32 Cash flows from financing activities Proceeds from stock conversion and offering 8,944 - Net cash flows from financing activities 8,944 - Net increase in cash and cash equivalents 2,616 48 Cash and cash equivalents - beginning 265 217 Cash and cash equivalents - ending $ 2,881 $ 265

Nature of Operations and Summ36

Nature of Operations and Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Loss By Component:
Unrealized losses on securities available-for-sale	$ (128)	$ (6)
Tax effect	43	2
Net unrealized losses on securities available-for-sale	(85)	(4)	$ 129
Unrealized losses on securities transferred to held-to-maturity		(323)
Tax effect		115
Net unrealized losses on securities transferred to held-to-maturity		(208)
Accumulated other comprehensive income	$ (85)	$ (212)	$ (226)

Nature of Operations and Summ37

Nature of Operations and Summary of Significant Accounting Policies (Detail 1) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Change in Accounting Estimate [Line Items]
Net income	$ 938,000	$ 513,000
Basic earnings per common share (in dollars per share)	$ 0.49	$ 0.27
Change in New York State Tax Law
Change in Accounting Estimate [Line Items]
Income from continuing operations	$ 627,000
Net income	$ 464,000
Basic earnings per common share (in dollars per share)	$ 0.24

Nature of Operations and Summ38

Nature of Operations and Summary of Significant Accounting Policies (Detail Textuals)	1 Months Ended	12 Months Ended
	Aug. 31, 2007USD ($)$ / sharesshares	Dec. 31, 2016USD ($)$ / sharesshares	Dec. 31, 2015USD ($)
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Minority offering	47.00%
Number of common stock issued | shares	1,785,000	1,941,688
Offering price (in dollars per share) | $ / shares	$ 10
Proceeds from stock conversion and offering	$ 7,400,000	$ 8,990,000
Conversion ratio on shares outstanding		1.0884
Loan servicing rights		$ 118,565,000	$ 85,858,000
Proceeds from MSR		804,000	561,000
Amortization of MSR		25,000	32,000
Capitalization Of MSR		$ 268,000	$ 227,000
Mutual Holding Company
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Number of common stock issued | shares	946,050
Ownership percentage	53.00%
Fairport Savings Bank
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Number of common stock issued | shares		1,034,649
Offering price (in dollars per share) | $ / shares		$ 10
Proceeds from stock conversion and offering		$ 8,900,000
Gross proceeds from common stock issued		10,300,000
Conversion related expenses		$ 1,400,000
Number of shares received | shares		1.0884
Conversion ratio on shares outstanding		1.0884
Employee Stock Ownership Plan
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Number of common stock issued | shares	69,972
Shares To Other Than Esop
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Number of common stock issued | shares	838,950

Nature of Operations and Summ39

Nature of Operations and Summary of Significant Accounting Policies (Detail Textuals 1)	12 Months Ended
	Dec. 31, 2016shares	Dec. 31, 2015shares
Property, Plant and Equipment [Line Items]
Depreciation Methods	Straight-line basis over the shorter of the estimated useful lives or lease terms (in the case of leasehold improvements) of the related assets.
Shares excluded from calculation of EPS	1,901,023	1,893,582
Conversion ratio on shares outstanding	1.0884
Maximum | Premises
Property, Plant and Equipment [Line Items]
Estimated Useful Lives	30 years
Maximum | Furniture and equipment
Property, Plant and Equipment [Line Items]
Estimated Useful Lives	10 years
Minimum | Premises
Property, Plant and Equipment [Line Items]
Estimated Useful Lives	20 years
Minimum | Furniture and equipment
Property, Plant and Equipment [Line Items]
Estimated Useful Lives	3 years

Securities - Amortized cost and

Securities - Amortized cost and estimated fair value of securities with gross unrealized gains and losses (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Available-for-Sale:
Amortized cost	$ 17,875	$ 19,974
Gross unrealized gains	45	101
Gross unrealized losses	(173)	(107)
Fair Value	17,747	19,968
Held-to-Maturity:
Amortized cost	7,420	12,979
Gross unrealized gains	38	244
Gross unrealized losses	(74)	(1)
Fair Value	7,384	13,222
U.S. Government and agency obligations
Available-for-Sale:
Amortized cost	8,106	6,000
Gross unrealized gains	3
Gross unrealized losses	(110)	(32)
Fair Value	7,999	5,968
Held-to-Maturity:
Amortized cost	745	6,793
Gross unrealized gains	13	129
Gross unrealized losses
Fair Value	758	6,922
Mortgage-backed securities - residential
Available-for-Sale:
Amortized cost	9,769	13,974
Gross unrealized gains	42	101
Gross unrealized losses	(63)	(75)
Fair Value	9,748	14,000
Held-to-Maturity:
Amortized cost	745	1,535
Gross unrealized gains	13	39
Gross unrealized losses
Fair Value	758	1,574
State and Municipal securities
Held-to-Maturity:
Amortized cost	6,675	4,651
Gross unrealized gains	25	76
Gross unrealized losses	(74)	(1)
Fair Value	$ 6,626	$ 4,726

Securities - Amortized cost a41

Securities - Amortized cost and estimated fair value by contractual maturity of debt securities (Details 1) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Available-for-Sale Amortized Cost
Due in one year or less
Due after one year through five years	6,106
Due after five years through ten years	1,000
Due after ten years	1,000
Amortized cost	17,875	$ 19,974
Available-for-Sale Fair Value
Due in one year or less
Due after one year through five years	6,022
Due after five years through ten years	1,003
Due after ten years	974
Fair Value	17,747	19,968
Held-to-Maturity Amortized Cost
Due in one year or less	755
Due after one year through five years	3,643
Due after five years through ten years	2,277
Due after ten years
Amortized cost	7,420	12,979
Held-to-Maturity Fair Value
Due in one year or less	756
Due after one year through five years	3,637
Due after five years through ten years	2,233
Due after ten years
Fair Value	7,384	13,222
Mortgage-backed securities - residential
Available-for-Sale Amortized Cost
Amortized cost	9,769	13,974
Available-for-Sale Fair Value
Fair Value	9,748	14,000
Held-to-Maturity Amortized Cost
Amortized cost	745	1,535
Held-to-Maturity Fair Value
Fair Value	$ 758	$ 1,574

Securities - Gross unrealized l

Securities - Gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position (Details 2) - USD ($) $ in Thousands		Dec. 31, 2016	Dec. 31, 2015
Available-for-Sale:
Less than Twelve Months, fair value		$ 11,437	$ 12,251
Less than Twelve Months, unrealized losses		159	93
Twelve Months or More, fair value		987	821
Twelve Months or More, unrealized losses		14	14
Total Fair Value		12,424	13,072
Total Unrealized Losses		173	107
Held-to-Maturity
Less than Twelve Months, Fair Value		4,453	455
Less than Twelve Months, Unrealized Losses		74
Twelve Months or More, Fair Value		45	126
Twelve Months or More, Unrealized Losses			1
Total Fair Value		4,498	581
Total Unrealized Losses		74	1
U.S. Government and agency obligations
Available-for-Sale:
Less than Twelve Months, fair value		6,996	5,968
Less than Twelve Months, unrealized losses		110	32
Twelve Months or More, fair value
Twelve Months or More, unrealized losses
Total Fair Value		6,996	5,968
Total Unrealized Losses		110	32
Mortgage-backed securities - residential
Available-for-Sale:
Less than Twelve Months, fair value		4,441	6,283
Less than Twelve Months, unrealized losses		49	61
Twelve Months or More, fair value		987	821
Twelve Months or More, unrealized losses		14	14
Total Fair Value		5,428	7,104
Total Unrealized Losses		63	75
Held-to-Maturity
Less than Twelve Months, Fair Value	[1]	178
Less than Twelve Months, Unrealized Losses	[1]
Twelve Months or More, Fair Value	[1]
Twelve Months or More, Unrealized Losses	[1]
Total Fair Value	[1]	178
Total Unrealized Losses	[1]
State and Municipal securities
Held-to-Maturity
Less than Twelve Months, Fair Value	[1]	4,275	455
Less than Twelve Months, Unrealized Losses	[1]	74
Twelve Months or More, Fair Value	[1]	45	126
Twelve Months or More, Unrealized Losses	[1]		1
Total Fair Value	[1]	4,320	581
Total Unrealized Losses	[1]	$ 74	$ 1
[1]	Aggregate unrealized loss position of these securities is less than $500

Securities (Detail Textuals)

Securities (Detail Textuals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Schedule Of Available For Sale and Held To Maturity Securities [Line Items]
Gain on sales of securities	$ 36	$ 106
Proceeds from sale of securities	$ 2,606,000	$ 3,430,000
Percentage of principal outstanding held to maturity securities	85.00%	85.00%
Available-for-sale securities
Schedule Of Available For Sale and Held To Maturity Securities [Line Items]
Gain on sales of securities	$ 24,000	$ 64,000
Held-to-maturity securities
Schedule Of Available For Sale and Held To Maturity Securities [Line Items]
Gain on sales of securities	$ 12,000	$ 42,000

Loans - Major classifications o

Loans - Major classifications of loans (Details) - USD ($) $ in Thousands	Dec. 31, 2016		Dec. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 227,069		$ 202,393
Net deferred loan origination costs	113		248
Allowance for loan losses	(990)	[1]	(811)	$ (653)
Net Loans	226,192		201,830
Real estate loans: | Secured by one-to-four family residences
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	188,573		177,037
Allowance for loan losses	(584)		(524)	(448)
Real estate loans: | Secured by multi-family residences
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	5,103		5,146
Allowance for loan losses	(38)		(39)	(29)
Real estate loans: | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	6,134		1,251
Allowance for loan losses	(31)		(6)	(6)
Real estate loans: | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	8,440		3,522
Allowance for loan losses	(84)		(35)	(14)
Real estate loans: | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	16,797		14,523
Allowance for loan losses	(112)		(101)	(87)
Other Loans Portfolio Segment | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,947		853
Allowance for loan losses	(28)		(11)	$ (1)
Other Loans Portfolio Segment | Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 75		$ 61
[1]	All Loans are collectively evaluated for impairment.

Loans - Summary of allowance fo

Loans - Summary of allowance for loan losses allocated by loan class and activity in allowance for loan losses for years (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016		Dec. 31, 2015
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 811		$ 653
Charge Offs	(1)
Recoveries
Provisions	180		158
Ending Balance	990	[1]	811
Real estate loans: | Secured by one-to-four family residences
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	524		448
Charge Offs
Recoveries
Provisions	60		76
Ending Balance	584		524
Real estate loans: | Secured by multi-family residences
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	39		29
Charge Offs
Recoveries
Provisions	(1)		10
Ending Balance	38		39
Real estate loans: | Construction
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	6		6
Charge Offs
Recoveries
Provisions	25
Ending Balance	31		6
Real estate loans: | Commercial
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	35		14
Charge Offs
Recoveries
Provisions	49		21
Ending Balance	84		35
Real estate loans: | Home equity lines of credit
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	101		87
Charge Offs
Recoveries
Provisions	11		14
Ending Balance	112		101
Other Loans Portfolio Segment | Commercial and industrial
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	11		1
Charge Offs
Recoveries
Provisions	17		10
Ending Balance	28		11
Other Unallocated
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	95		68
Charge Offs	(1)
Recoveries
Provisions	19		27
Ending Balance	$ 113	[1]	$ 95
[1]	All Loans are collectively evaluated for impairment.

Loans - Risk category of loans

Loans - Risk category of loans by class (Details 2) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 227,069	$ 202,393
Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	225,229	200,940
Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans
Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,840	1,452
Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		1
Real estate loans: | Secured by one-to-four family residences
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	188,573	177,037
Real estate loans: | Secured by one-to-four family residences | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	187,079	175,885
Real estate loans: | Secured by one-to-four family residences | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans
Real estate loans: | Secured by one-to-four family residences | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,494	1,152
Real estate loans: | Secured by one-to-four family residences | Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans
Real estate loans: | Secured by multi-family residences
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	5,103	5,146
Real estate loans: | Secured by multi-family residences | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	5,103	5,146
Real estate loans: | Secured by multi-family residences | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans
Real estate loans: | Secured by multi-family residences | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans
Real estate loans: | Secured by multi-family residences | Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans
Real estate loans: | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	6,134	1,251
Real estate loans: | Construction | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	6,134	1,251
Real estate loans: | Construction | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans
Real estate loans: | Construction | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans
Real estate loans: | Construction | Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans
Real estate loans: | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	8,440	3,522
Real estate loans: | Commercial real estate | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	8,440	3,522
Real estate loans: | Commercial real estate | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans
Real estate loans: | Commercial real estate | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans
Real estate loans: | Commercial real estate | Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans
Real estate loans: | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	16,797	14,523
Real estate loans: | Home equity lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	16,498	14,223
Real estate loans: | Home equity lines of credit | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans
Real estate loans: | Home equity lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	299	300
Real estate loans: | Home equity lines of credit | Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans
Other Loans Portfolio Segment | Commercial & industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,947	853
Other Loans Portfolio Segment | Commercial & industrial loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,900	853
Other Loans Portfolio Segment | Commercial & industrial loans | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans
Other Loans Portfolio Segment | Commercial & industrial loans | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	47
Other Loans Portfolio Segment | Commercial & industrial loans | Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans
Other Loans Portfolio Segment | Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	75	61
Other Loans Portfolio Segment | Other loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	75	60
Other Loans Portfolio Segment | Other loans | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans
Other Loans Portfolio Segment | Other loans | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans
Other Loans Portfolio Segment | Other loans | Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		$ 1

Loans - Analysis of age of loan

Loans - Analysis of age of loan delinquencies by type and by amount past due (Details 3) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 136	$ 209
Current	226,933	202,184
Loans	227,069	202,393
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	136	127
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due
Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		82
Real estate loans: | One- to four-family residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	89	181
Current	188,484	176,856
Loans	188,573	177,037
Real estate loans: | One- to four-family residential | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	89	118
Real estate loans: | One- to four-family residential | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due
Real estate loans: | One- to four-family residential | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		63
Real estate loans: | Multi-family residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due
Current	5,103	5,146
Loans	5,103	5,146
Real estate loans: | Multi-family residential | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due
Real estate loans: | Multi-family residential | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due
Real estate loans: | Multi-family residential | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due
Real estate loans: | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due
Current	6,134	1,251
Loans	6,134	1,251
Real estate loans: | Construction | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due
Real estate loans: | Construction | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due
Real estate loans: | Construction | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due
Real estate loans: | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due
Current	8,440	3,522
Loans	8,440	3,522
Real estate loans: | Commercial | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due
Real estate loans: | Commercial | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due
Real estate loans: | Commercial | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due
Real estate loans: | Home equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		18
Current	16,797	14,505
Loans	16,797	14,523
Real estate loans: | Home equity lines of credit | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due
Real estate loans: | Home equity lines of credit | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due
Real estate loans: | Home equity lines of credit | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		18
Other Loans Portfolio Segment | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	47
Current	1,900	853
Loans	1,947	853
Other Loans Portfolio Segment | Commercial and industrial | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	47
Other Loans Portfolio Segment | Commercial and industrial | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due
Other Loans Portfolio Segment | Commercial and industrial | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due
Other Loans Portfolio Segment | Other loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		10
Current	75	51
Loans	75	61
Other Loans Portfolio Segment | Other loans | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		9
Other Loans Portfolio Segment | Other loans | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due
Other Loans Portfolio Segment | Other loans | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		$ 1

Loans (Detail Textuals)

Loans (Detail Textuals)	12 Months Ended
	Dec. 31, 2016USD ($)Loan	Dec. 31, 2015USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 227,069,000	$ 202,393,000
Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of nonaccrual loans | Loan	1
Financing receivable, recorded Investment, nonaccrual status	$ 63,000
Checking line of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of nonaccrual loans | Loan	1
Financing receivable, recorded Investment, nonaccrual status	$ 1,000
Real estate loans: | Secured by one-to-four family residences
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 188,573,000	$ 177,037,000
Percentage of portfolio loans	83.00%	87.50%
Real estate loans: | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of nonaccrual loans | Loan	1
Financing receivable, recorded Investment, nonaccrual status	$ 18,000
Total loans	$ 16,797,000	$ 14,523,000
Percentage of portfolio loans	7.40%	7.20%
Real estate loans: | Secured by multi-family residences
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 5,103,000	$ 5,146,000
Percentage of portfolio loans	2.20%	2.50%
Term of loan	20 years
Real estate loans: | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 6,134,000	$ 1,251,000
Percentage of portfolio loans	2.70%	0.60%
Additional unadvanced portion of loans	$ 5,000,000	$ 1,300,000
Real estate loans: | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 8,440,000	$ 3,522,000
Percentage of portfolio loans	3.70%	1.70%
Maximum adjustable rate loans term	15 years
Maximum loan to value ratio	80.00%
Other Loans Portfolio Segment | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 1,947,000	$ 853,000
Percentage of portfolio loans	0.90%	0.40%
Other Loans Portfolio Segment | Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 75,000	$ 61,000
Percentage of portfolio loans	0.10%	0.10%

Premises and Equipment (Details

Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 7,983	$ 7,108
Accumulated depreciation and amortization	(4,808)	(4,364)
Premises and equipment, net	3,175	2,744
Premises
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	4,355	4,305
Furniture and equipment
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 3,628	$ 2,803

Premises and Equipment (Detai50

Premises and Equipment (Details 1) $ in Thousands	Dec. 31, 2016USD ($)
Property, Plant and Equipment [Abstract]
2,017	$ 442
2,018	433
2,019	433
2,020	390
2,021	368
Thereafter	1,933
Total	$ 3,999

Premises and Equipment (Detail

Premises and Equipment (Detail Textuals) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Leases expense	$ 429,000
Operating leases, rent expense, net		$ 418,000

Deposits (Details)

Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deposits [Abstract]
Non-interest bearing	$ 8,423	$ 6,974
NOW accounts	29,725	28,751
Regular savings, tax escrow and demand clubs	26,655	27,306
Money market	30,123	21,029
Individual retirement accounts	6,975	8,252
Certificates of deposit	81,033	93,249
Total Deposits	$ 182,934	$ 185,561

Deposits (Details 1)

Deposits (Details 1) $ in Thousands	Dec. 31, 2016USD ($)
Deposits [Abstract]
2,017	$ 63,383
2,018	18,931
2,019	1,947
2,020	2,029
2,021	1,718
Individual retirement accounts and certificates of deposit	$ 88,008

Deposits (Details 2)

Deposits (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Deposits [Abstract]
NOW accounts	$ 74	$ 36
Regular savings and demand clubs	102	127
Money market	100	63
Individual retirement accounts	64	105
Certificates of deposit	1,096	921
Interest expense on deposits	$ 1,436	$ 1,252

Deposits (Detail Textuals)

Deposits (Detail Textuals) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Deposits [Abstract]
Time deposits, each with a minimum denomination of $250,000	$ 7,746,000	$ 11,100,000
Deposit insurance per account owner	$ 250,000

Borrowings (Details)

Borrowings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Federal Home Loan Bank, Advances [Line Items]
Contractual maturities of borrowings with the FHLB	$ 56,813	$ 46,092
Advance Date 06/05/06
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	06/06/16
Current Rate	5.63%
Contractual maturities of borrowings with the FHLB		1,000
Advance Date 04/25/12
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	4/25/17
Current Rate	1.03%
Contractual maturities of borrowings with the FHLB	$ 128	433
Advance Date 08/16/12
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	08/16/17
Current Rate	1.00%
Contractual maturities of borrowings with the FHLB	$ 306	711
Advance Date 09/05/12
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	09/05/19
Current Rate	1.13%
Contractual maturities of borrowings with the FHLB	$ 829	1,115
Advance Date 11/06/12
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	11/6/17
Current Rate	0.86%
Contractual maturities of borrowings with the FHLB	$ 407	810
Advance Date 11/27/12
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	11/27/17
Current Rate	1.12%
Contractual maturities of borrowings with the FHLB	$ 1,000	1,000
Advance Date 12/19/12
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	12/19/19
Current Rate	1.20%
Contractual maturities of borrowings with the FHLB	$ 902	1,187
Advance Date 12/27/12
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	12/27/16
Current Rate	0.97%
Contractual maturities of borrowings with the FHLB		1,000
Advance Date 12/27/12
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	12/27/17
Current Rate	0.89%
Contractual maturities of borrowings with the FHLB	$ 220	422
Advance Date 01/04/13
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	01/04/19
Current Rate	1.52%
Contractual maturities of borrowings with the FHLB	$ 1,000	1,000
Advance Date 01/15/13
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	01/16/18
Current Rate	1.18%
Contractual maturities of borrowings with the FHLB	$ 1,000	1,000
Advance Date 01/22/13
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	01/23/17
Current Rate	0.96%
Contractual maturities of borrowings with the FHLB	$ 1,000	1,000
Advance Date 01/22/13
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	01/22/18
Current Rate	1.20%
Contractual maturities of borrowings with the FHLB	$ 1,000	1,000
Advance Date 01/22/13
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	01/22/19
Current Rate	1.44%
Contractual maturities of borrowings with the FHLB	$ 1,000	1,000
Advance Date 02/12/13
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	02/12/16
Current Rate	0.79%
Contractual maturities of borrowings with the FHLB		1,500
Advance Date 02/20/13
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	02/21/20
Current Rate	1.28%
Contractual maturities of borrowings with the FHLB	$ 475	618
Advance Date 02/20/13
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	02/21/23
Current Rate	1.77%
Contractual maturities of borrowings with the FHLB	$ 646	742
Advance Date 07/02/13
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	07/02/18
Current Rate	1.35%
Contractual maturities of borrowings with the FHLB	$ 682	1,083
Advance Date 07/22/13
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	07/23/18
Current Rate	1.27%
Contractual maturities of borrowings with the FHLB	$ 681	1,083
Advance Date 09/19/13
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	09/19/18
Current Rate	1.37%
Contractual maturities of borrowings with the FHLB	$ 375	575
Advance Date 09/19/13
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	09/16/16
Current Rate	1.14%
Contractual maturities of borrowings with the FHLB		2,000
Advance Date 01/21/14
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	01/22/18
Current Rate	1.72%
Contractual maturities of borrowings with the FHLB	$ 1,000	1,000
Advance Date 01/21/14
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	01/22/19
Current Rate	1.45%
Contractual maturities of borrowings with the FHLB	$ 442	642
Advance Date 03/20/14
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	03/20/19
Current Rate	1.50%
Contractual maturities of borrowings with the FHLB	$ 714	1,012
Advance Date 03/24/14
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	03/24/17
Current Rate	1.32%
Contractual maturities of borrowings with the FHLB	$ 1,500	1,500
Advance Date 07/21/14
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	07/21/21
Current Rate	1.94%
Contractual maturities of borrowings with the FHLB	$ 682	820
Advance Date 07/21/14
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	07/22/19
Current Rate	2.08%
Contractual maturities of borrowings with the FHLB	$ 500	500
Advance Date 07/21/14
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	07/23/18
Current Rate	1.79%
Contractual maturities of borrowings with the FHLB	$ 1,000	1,000
Advance Date 08/06/14
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	08/6/18
Current Rate	1.80%
Contractual maturities of borrowings with the FHLB	$ 1,000	1,000
Advance Date 08/21/14
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	08/22/16
Current Rate	0.92%
Contractual maturities of borrowings with the FHLB		1,000
Advance Date 08/21/14
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	08/21/19
Current Rate	2.12%
Contractual maturities of borrowings with the FHLB	$ 1,000	1,000
Advance Date 10/02/14
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	10/4/21
Current Rate	2.00%
Contractual maturities of borrowings with the FHLB	$ 1,434	1,709
Advance Date 10/15/14
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	10/15/21
Current Rate	1.69%
Contractual maturities of borrowings with the FHLB	$ 715	853
Advance Date 11/28/14
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	11/29/21
Current Rate	1.90%
Contractual maturities of borrowings with the FHLB	$ 1,455	1,730
Advance Date 12/31/14
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	12/31/19
Current Rate	1.63%
Contractual maturities of borrowings with the FHLB	$ 626	823
Advance Date 12/31/14
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	01/02/18
Current Rate	1.52%
Contractual maturities of borrowings with the FHLB	$ 1,000	1,000
Advance Date 01/14/15
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	01/14/20
Current Rate	1.73%
Contractual maturities of borrowings with the FHLB	$ 1,500	1,500
Advance Date 01/21/15
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	01/21/20
Current Rate	1.79%
Contractual maturities of borrowings with the FHLB	$ 500	500
Advance Date 01/21/15
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	01/21/21
Current Rate	1.97%
Contractual maturities of borrowings with the FHLB	$ 500	500
Advance Date 04/13/15
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	04/13/20
Current Rate	1.74%
Contractual maturities of borrowings with the FHLB	$ 1,000	1,000
Advance Date 05/20/15
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	05/20/20
Current Rate	1.52%
Contractual maturities of borrowings with the FHLB	$ 708	903
Advance Date 05/20/15
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	05/20/22
Current Rate	1.91%
Contractual maturities of borrowings with the FHLB	$ 796	933
Advance Date 06/25/15
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	06/25/20
Current Rate	1.65%
Contractual maturities of borrowings with the FHLB	$ 725	920
Advance Date 06/25/15
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	06/26/17
Current Rate	1.14%
Contractual maturities of borrowings with the FHLB	$ 1,000	1,000
Advance Date 10/29/15
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	10/29/20
Current Rate	1.51%
Contractual maturities of borrowings with the FHLB	$ 1,579	1,968
Advance Date 10/29/15
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	10/29/20
Current Rate	1.90%
Contractual maturities of borrowings with the FHLB	$ 1,000	1,000
Advance Date 01/27/16
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	01/27/21
Current Rate	1.92%
Contractual maturities of borrowings with the FHLB	$ 1,000
Advance Date 01/27/16
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	01/27/23
Current Rate	1.87%
Contractual maturities of borrowings with the FHLB	$ 888
Advance Date 02/12/16
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	02/13/23
Current Rate	1.66%
Contractual maturities of borrowings with the FHLB	$ 898
Advance Date 02/12/16
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	02/13/23
Current Rate	2.04%
Contractual maturities of borrowings with the FHLB	$ 500
Advance Date 08/24/16
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	08/24/17
Current Rate	1.01%
Contractual maturities of borrowings with the FHLB	$ 1,000
Advance Date 08/24/16
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	08/24/18
Current Rate	1.22%
Contractual maturities of borrowings with the FHLB	$ 1,000
Advance Date 09/21/16
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	03/21/17
Current Rate	0.83%
Contractual maturities of borrowings with the FHLB	$ 1,000
Advance Date 09/21/16
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	09/21/17
Current Rate	1.06%
Contractual maturities of borrowings with the FHLB	$ 2,000
Advance Date 09/30/16
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	03/30/17
Current Rate	0.79%
Contractual maturities of borrowings with the FHLB	$ 1,000
Advance Date 10/28/16
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	10/28/20
Current Rate	1.57%
Contractual maturities of borrowings with the FHLB	$ 1,000
Advance Date 11/04/16
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	11/04/21
Current Rate	1.72%
Contractual maturities of borrowings with the FHLB	$ 2,000
Advance Date 11/17/16
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	11/17/21
Current Rate	2.13%
Contractual maturities of borrowings with the FHLB	$ 1,000
Advance Date 11/17/16
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	11/17/21
Current Rate	1.78%
Contractual maturities of borrowings with the FHLB	$ 1,000
Advance Date 11/17/16
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	11/17/23
Current Rate	2.07%
Contractual maturities of borrowings with the FHLB	$ 1,000
Advance Date 11/28/16
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	11/29/19
Current Rate	1.78%
Contractual maturities of borrowings with the FHLB	$ 1,500
Advance Date 12/08/16
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	12/08/17
Current Rate	1.22%
Contractual maturities of borrowings with the FHLB	$ 1,000
Advance Date 12/21/16
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	06/21/17
Current Rate	0.95%
Contractual maturities of borrowings with the FHLB	$ 1,000
Advance Date 12/21/16
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	12/23/19
Current Rate	1.91%
Contractual maturities of borrowings with the FHLB	$ 1,000
Advance Date 12/30/16
Federal Home Loan Bank, Advances [Line Items]
Maturity Date	01/03/17
Current Rate	0.74%
Contractual maturities of borrowings with the FHLB	$ 3,000

Borrowings (Details 1)

Borrowings (Details 1) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Contractual Maturity
2,017	$ 15,562
2,018	8,737
2,019	9,513
2,020	8,488
2,021	9,785
Thereafter	4,728
Total	$ 56,813	$ 46,092
Weighted Average Rate
2,017	0.98%
2,018	1.46%
2,019	1.62%
2,020	1.65%
2,021	1.88%
Thereafter	2.27%
Total	1.49%

Borrowings (Detail Textuals)

Borrowings (Detail Textuals) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Debt Disclosure [Abstract]
Residential mortgages carrying amount	$ 165,546,000	$ 168,199,000
Residential mortgages available borrowings	90,868,000	$ 100,860,000
Repurchase agreement additional liquidity	$ 10,000,000

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Current
Federal	$ 439	$ 247
State	4	5
Deferred	(116)	(116)
Income Tax Expense (Benefit)	$ 328	$ 136

Income Taxes (Details 1)

Income Taxes (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Federal Tax at a Statutory rate	$ 431	$ 221
Federal Tax at a Statutory rate, % of Pre-tax Income	34.00%	34.00%
State taxes, net of Federal provision	$ 119	$ (223)
State taxes, net of Federal provision, % of Pre-tax Income	9.00%	(34.00%)
Change in valuation allowance	$ (178)	$ 182
Change in valuation allowance, % of Pre-tax Income	(14.00%)	28.00%
Nontaxable interest and dividend income	$ (44)	$ (44)
Nontaxable interest and dividend income, % of Pre-tax Income	(3.00%)	(7.00%)
Other items
Other items, % of Pre-tax Income
Income tax provision	$ 328	$ 136
Income tax provision, % of Pre-tax Income	26.00%	21.00%

Income Taxes (Details 2)

Income Taxes (Details 2) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets:
Deferred loan origination fees	$ 95	$ 43
Allowance for loan losses - Federal	379	314
State tax credits	1,102	1,381
Depreciation	64	81
Supplemental Executive Retirement Plan	290	226
Other-than-temporary impairment loss on securities		22
Unrealized loss on securities available for sale and transferred to held to maturity	43	117
Net operating loss	159
Other		1
Total deferred tax assets, gross	2,132	2,185
Valuation allowance	(1,318)	(1,507)
Total deferred tax assets, net of valuation allowance	814	678
Deferred tax liabilities:
Mortgage servicing rights	(308)	(217)
Total deferred tax liabilities	(308)	(217)
Net deferred tax asset	$ 506	$ 461

Income Taxes (Detail Textuals)

Income Taxes (Detail Textuals) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Statutory federal income tax rate	26.00%	21.00%
Percentage of effective tax rate	34.00%	34.00%
Amount of valuation allowance against allowance for loan loss	$ 88,000
Amount of valuation allowance that should be reversed	44,000	$ 44,000
Deferred tax liability not recognized with respect to Federal base year reserve	1,518,000	1,518,000
Deferred tax liability, unrecognized, federal base year reserve	$ 516,000	$ 516,000

Accumulated Other Comprehensi63

Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Unrealized Gains and Losses on Available-for-Sale Securities, Beginning balance	$ (4)	$ 129
Unrealized Gains and Losses on Available-for-Sale Securities, Other comprehensive (loss) income before reclassifications	(57)	(63)
Unrealized gains and losses on available - for - sale securities, Amounts reclassified from AOCI	(24)	(70)
Unrealized Gains and Losses on Available-for-Sale Securities, Ending balance	(85)	(4)
Unrealized Loss on Securities Transferred to Held-to-Maturity, Beginning balance		208	$ 355
Unrealized Loss on Securities Transferred to Held-to-Maturity, Other comprehensive income before reclassifications	208	147
Unrealized Losses on Securities Transferred to Held to Maturity, Amounts reclassified from AOCI
Unrealized Loss on Securities Transferred to Held-to-Maturity, Ending balance		(208)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	(212)	(226)
Other comprehensive income before reclassifications	151	84
Amounts reclassified from AOCI	(24)	(70)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	$ (85)	$ (212)

Accumulated Other Comprehensi64

Accumulated Other Comprehensive Income (Loss) (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Comprehensive Income Loss Note [Abstract]
Realized gain on sale of securities - Available for sale securities	$ 24	$ 64
Realized gain on sale of securities - Held to maturity securities	12	42
Provision for Income Taxes	(12)	(36)
Net Income	$ 24	$ 70

Employee Benefit Plans (Detail

Employee Benefit Plans (Detail Textuals)	12 Months Ended
	Dec. 31, 2016USD ($)Executiveshares	Dec. 31, 2015USD ($)shares
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Description of defined contribution pension	Employees are eligible for participation in the 401(k) Plan after one year of service and attaining age 21. The 401(k) Plan allows employees to contribute 1% to 100% of their annual salary subject to statutory limitations. Matching contributions made by the Bank are 100% of the first 6% of compensation that an employee contributes to the 401(k) Plan.
Matching contributions made by the Bank	100.00%
Matching contributions made by employees	$ 189,000	$ 174,000
Discretionary contributions made	77,000	$ 72,000
ESOP borrowed to purchase shares	$ 700,000
Number of shares purchased | shares	69,972
Employee stock ownership plan debt structure description	The loan is being repaid in twenty equal annual installments through 2026. The loan bears interest at the prime rate.
Total shares released to participants | shares	3,498	3,498
Expense related to ESOP	$ 44,000	$ 35,000
Number of unearned ESOP shares	34,986
Aggregate market value of unearned ESOP shares.	$ 496,801
Supplemental executive retirement plan (SERP)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Number of executive under supplemental executive retirement plan (SERP) | Executive	2
Contribution recorded under supplemental executive retirement plan (SERP)	$ 759,000	621,000
Total expense under the SERP	$ 138,000	$ 125,000

Related Party Transactions (Det

Related Party Transactions (Detail Textuals) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Related Party Transactions [Abstract]
Loans outstanding with related parties	$ 596,000	$ 168,000
New loans	651,000
Sales of loans	166,000
Repayment of loans	$ 57,000

Commitments (Details)

Commitments (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amount of financial instrument	$ 37,795	$ 27,556
Commitments to grant loans
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amount of financial instrument	15,199	10,415
Unadvanced portion of construction loans
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amount of financial instrument	5,009	1,338
Unfunded commitments under lines of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amount of financial instrument	$ 17,587	$ 15,803

Commitments (Detail Textuals)

Commitments (Detail Textuals)	12 Months Ended
	Dec. 31, 2016USD ($)
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loan amount	$ 10,802,000
Maximum
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Interest rate during period	5.00%
Minimum
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Interest rate during period	3.00%

Regulatory Matters (Details)

Regulatory Matters (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Banking and Thrift [Abstract]
Total Core Capital (to Risk- Weighted Assets), Actual amount	$ 29,264	$ 20,757
Total Core Capital (to Risk- Weighted Assets), Actual ratio	18.45%	15.12%
Total Core Capital (to Risk- Weighted Assets), For capital adequacy purposes amount	$ 12,689	$ 10,980
Total Core Capital (to Risk- Weighted Assets), For capital adequacy purposes ratio	8.00%	8.00%
Total Core Capital (to Risk- Weighted Assets), To be well capitalized under prompt corrective action provisions amount	$ 15,861	$ 13,725
Total Core Capital (to Risk- Weighted Assets), To be well capitalized under prompt corrective action provisions ratio	10.00%	10.00%
Total Core Capital (to Risk- Weighted Assets), Well capitalized with buffer	$ 16,654
Total Core Capital (to Risk- Weighted Assets), Well capitalized with buffer ratio	10.50%
Tier 1 Capital (to Risk-Weighted Assets), Actual amount	$ 28,274	$ 19,946
Tier 1 Capital (to Risk-Weighted Assets), Actual ratio	17.83%	14.53%
Tier 1 Capital (to Risk-Weighted Assets), For capital adequacy purposes amount	$ 9,516	$ 8,235
Tier 1 Capital (to Risk-Weighted Assets), For capital adequacy purposes ratio	6.00%	6.00%
Tier 1 Capital (to Risk-Weighted Assets), To be well capitalized under prompt corrective action provisions amount	$ 12,689	$ 10,980
Tier 1 Capital (to Risk-Weighted Assets), To be well capitalized under prompt corrective action provisions ratio	8.00%	8.00%
Tier 1 Capital (to Risk-Weighted Assets), Well capitalized with buffer	$ 13,482
Tier 1 Capital (to Risk-Weighted Assets), Well capitalized with buffer ratio	8.50%
Tier 1 Common Equity (to Risk-Weighted Assets), Actual amount	$ 28,274	$ 19,946
Tier 1 Common Equity (to Risk-Weighted Assets), Actual ratio	17.83%	14.53%
Tier 1 Common Equity (to Risk-Weighted Assets), For Capital Adequacy Purposes	$ 7,137	$ 6,176
Tier 1 Common Equity (to Risk-Weighted Assets), For capital adequacy purposes ratio	4.50%	4.50%
Tier 1 Common Equity (to Risk-Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions	$ 10,309	$ 8,921
Tier 1 Common Equity (to Risk-Weighted Assets), To be well capitalized under prompt corrective action provisions ratio	6.50%	6.50%
Tier 1 Common Equity (to Risk-Weighted Assets), For well capitalized buffer	$ 11,102
Tier 1 Common Equity (to Risk-Weighted Assets), For well capitalized buffer ratio	7.00%
Tier 1 Capital (to Assets), Actual amount	$ 28,274	$ 19,946
Tier 1 Capital (to Assets), Actual ratio	10.70%	7.85%
Tier 1 Capital (to Assets), For adequacy purpose	$ 10,572	$ 10,167
Tier 1 Capital (to Assets), For adequacy purpose ratio	4.00%	4.00%
Tier 1 Capital (to Assets), To be well capitalized	$ 13,214	$ 12,709
Tier 1 Capital (to Assets), To well capitalized ratio	5.00%	5.00%
Tier 1 Capital (to Assets), To well capitalized with buffer	$ 13,214
Tier 1 Capital (to Assets), To well capitalized with buffer ratio	5.00%

Fair Value Measurements - Fair

Fair Value Measurements - Fair value on a recurring basis, the fair value measurements by level within the fair value hierarchy (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Available-for-Sale Portfolio
Securities available for sale	$ 17,747	$ 19,968
Total Fair Value | Level 2
Available-for-Sale Portfolio
Securities available for sale	17,747	19,968
Fair Value, Measurements, Recurring | Level 1
Available-for-Sale Portfolio
Securities available for sale
Fair Value, Measurements, Recurring | Level 1 | U.S. Government and agency obligations
Available-for-Sale Portfolio
Securities available for sale
Fair Value, Measurements, Recurring | Level 1 | Mortgage-backed securities - residential
Available-for-Sale Portfolio
Securities available for sale
Fair Value, Measurements, Recurring | Level 2
Available-for-Sale Portfolio
Securities available for sale	17,747	19,968
Fair Value, Measurements, Recurring | Level 2 | U.S. Government and agency obligations
Available-for-Sale Portfolio
Securities available for sale	7,999	5,968
Fair Value, Measurements, Recurring | Level 2 | Mortgage-backed securities - residential
Available-for-Sale Portfolio
Securities available for sale	9,748	14,000
Fair Value, Measurements, Recurring | Level 3
Available-for-Sale Portfolio
Securities available for sale
Fair Value, Measurements, Recurring | Level 3 | U.S. Government and agency obligations
Available-for-Sale Portfolio
Securities available for sale
Fair Value, Measurements, Recurring | Level 3 | Mortgage-backed securities - residential
Available-for-Sale Portfolio
Securities available for sale
Fair Value, Measurements, Recurring | Total Fair Value
Available-for-Sale Portfolio
Securities available for sale	17,747	19,968
Fair Value, Measurements, Recurring | Total Fair Value | U.S. Government and agency obligations
Available-for-Sale Portfolio
Securities available for sale	7,999	5,968
Fair Value, Measurements, Recurring | Total Fair Value | Mortgage-backed securities - residential
Available-for-Sale Portfolio
Securities available for sale	$ 9,748	$ 14,000

Fair Value Measurements - Carry

Fair Value Measurements - Carrying amounts and estimated fair values of the financial instruments (Details 1) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Financial assets:
Interest-earning demand deposits	$ 5,773	$ 4,597
Securities available for sale	17,747	19,968
Securities - held-to-maturity	7,420	12,979
Financial liabilities:
Deposits	182,934	185,561
Carrying Amount | Level 1
Financial assets:
Cash and due from banks	1,634	1,550
Interest-earning demand deposits	5,773	4,597
Accrued interest receivable	652	655
Financial liabilities:
Deposits	182,934	185,561
Accrued interest payable	71	60
Carrying Amount | Level 2
Financial assets:
Securities available for sale	17,747	19,968
Securities - held-to-maturity	7,420	12,979
Investment in FHLB stock	2,886	2,388
Loans held for sale	2,059	3,880
Financial liabilities:
Deposits	182,934	185,561
Borrowings	56,813	46,092
Carrying Amount | Level 3
Financial assets:
Loans, net	226,192	201,830
Fair Value | Level 1
Financial assets:
Cash and due from banks	1,634	1,550
Interest-earning demand deposits	5,773	4,597
Accrued interest receivable	652	655
Financial liabilities:
Deposits	182,969	185,332
Accrued interest payable	71	60
Fair Value | Level 2
Financial assets:
Securities available for sale	17,747	19,968
Securities - held-to-maturity	7,384	13,222
Investment in FHLB stock	2,886	2,388
Loans held for sale	2,059	3,880
Financial liabilities:
Deposits	182,969	185,332
Borrowings	57,008	46,447
Fair Value | Level 3
Financial assets:
Loans, net	$ 225,569	$ 201,886

FSB Bancorp, Inc. (Parent Com72

FSB Bancorp, Inc. (Parent Company Only) Financial Information (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Assets
Cash and cash equivalents	$ 7,407	$ 6,147	$ 4,335
Securities available-for-sale	17,747	19,968
Total Assets	273,721	255,807
Liabilities and Stockholders' Equity
Total Liabilities	241,862	234,047
Stockholder' Equity	31,859	21,760	21,204
Total Liabilities and Stockholders' Equity	273,721	255,807
Parent company
Assets
Cash and cash equivalents	2,881	265	$ 217
Securities available-for-sale		1,000
Investment in banking subsidiary	28,610	20,085
ESOP loan receivable	398	431
Accrued interest receivable		9
Total Assets	31,889	21,790
Liabilities and Stockholders' Equity
Total Liabilities	30	30
Stockholder' Equity	31,859	21,760
Total Liabilities and Stockholders' Equity	$ 31,889	$ 21,790

FSB Bancorp, Inc. (Parent Com73

FSB Bancorp, Inc. (Parent Company Only) Financial Information (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Interest Income	$ 8,724	$ 8,125
Net Income	938	513
Parent company
Income Statement [Abstract]
Interest Income	20	53
Other Expense	(89)	(37)
Equity in undistributed earnings of banking subsidiary	1,007	497
Net Income	$ 938	$ 513

FSB Bancorp, Inc. (Parent Com74

FSB Bancorp, Inc. (Parent Company Only) Financial Information (Details 2) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Aug. 31, 2007	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities
Net income		$ 938	$ 513
Adjustments to reconcile net income to net cash flows from operating activities:
Decrease in accrued interest receivable		(3)
Net decrease in other liabilities		675	165
Net cash flows from operating activities		3,562	250
Cash flows from investing activities
Proceeds from maturities and calls of securities available-for-sale		7,334	4,307
Net cash flows from investing activities		(18,590)	(7,509)
Cash flows from financing activities
Proceeds from stock conversion and offering	$ 7,400	8,990
Net cash flows from financing activities		16,288	9,071
Net increase in cash and cash equivalents		1,260	1,812
Cash and Cash Equivalents - Beginning		6,147	4,335
Cash and Cash Equivalents - Ending		7,407	6,147
Parent company
Cash flows from operating activities
Net income		938	513
Adjustments to reconcile net income to net cash flows from operating activities:
Equity in undistributed earnings of banking subsidiary		(1,007)	(497)
Decrease in accrued interest receivable		8	16
Net decrease in other liabilities			(16)
Net cash flows from operating activities		(61)	16
Cash flows from investing activities
Proceeds to banking subsidiary		(7,300)	(1,938)
Proceeds from maturities and calls of securities available-for-sale		1,000	1,938
Payments received on ESOP loan		33	32
Net cash flows from investing activities		(6,267)	32
Cash flows from financing activities
Proceeds from stock conversion and offering		8,944
Net cash flows from financing activities		8,944
Net increase in cash and cash equivalents		2,616	48
Cash and Cash Equivalents - Beginning		265	217
Cash and Cash Equivalents - Ending		$ 2,881	$ 265