MSB Financial 10-K 29 Mar 19 2018 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2018	Mar. 29, 2019	Jun. 29, 2018
Document And Entity Information
Entity Registrant Name	MSB FINANCIAL CORP
Entity Central Index Key	0001635261
Trading Symbol	msbf
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Company
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Season Issuer	No
Entity Common Stock, Shares Outstanding		5,373,954
Entity Public Float			$ 89,500,000
Document Type	10-K
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Amendment Flag	false

Consolidated Statements of Fina

Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Cash and due from banks	$ 1,558	$ 2,030
Interest-earning demand deposits with banks	10,242	20,279
Cash and Cash Equivalents	11,800	22,309
Securities held to maturity (fair value of $38,569 and $38,255, respectively)	39,476	38,482
Loans receivable, net of allowance for loan losses of $5,655 and $5,414, respectively	502,299	473,405
Premises and equipment	8,180	8,698
Federal Home Loan Bank of New York stock, at cost	4,756	2,131
Bank owned life insurance	14,585	14,197
Accrued interest receivable	1,615	1,607
Other assets	1,789	2,211
Total Assets	584,500	563,040
Deposits:
Non-interest bearing	46,690	36,919
Interest bearing	373,889	411,994
Total Deposits	420,579	448,913
Advances from Federal Home Loan Bank of New York	94,275	37,675
Advance payments by borrowers for taxes and insurance	749	686
Other liabilities	2,251	2,741
Total Liabilities	517,854	490,015
Stockholders' Equity
Preferred stock, par value $0.01; 1,000,000 shares authorized; no shares issued or outstanding	0	0
Common stock, par value $0.01; 49,000,000 shares authorized; 5,389,054 and 5,768,632 issued and outstanding at December 31, 2018 and December 31, 2017, respectively	54	58
Paid-in capital	44,726	51,068
Retained earnings	23,498	23,641
Unallocated common stock held by ESOP (179,464 and 190,390 shares, respectively)	(1,632)	(1,742)
Total Stockholders' Equity	66,646	73,025
Total Liabilities and Stockholders' Equity	$ 584,500	$ 563,040

Consolidated Statements of Fi_2

Consolidated Statements of Financial Condition (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Securities held to maturity, fair value	$ 38,569	$ 38,255
Loans receivable, allowance for loan losses	$ 5,655	$ 5,414
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	49,000,000	49,000,000
Common stock, share issued (in shares)	5,768,632	5,714,182
Common stock, share outstanding (in shares)	5,768,632	5,714,182
Unallocated common stock held by ESOP, shares (in shares)	190,390	201,316

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Interest Income
Loans receivable, including fees	$ 21,960	$ 18,278
Securities held to maturity	1,065	1,011
Other	320	191
Total Interest Income	23,345	19,480
Interest Expense
Deposits	3,834	2,450
Borrowings	1,564	996
Total Interest Expense	5,398	3,446
Net Interest Income	17,947	16,034
Provision for Loan Losses	240	1,185
Net Interest Income after Provision for Loan Losses	17,707	14,849
Non-Interest Income
Fees and service charges	334	342
Income from bank owned life insurance	388	413
Other	78	67
Total Non-Interest Income	800	822
Non-Interest Expenses
Salaries and employee benefits	6,673	6,240
Directors compensation	490	743
Occupancy and equipment	1,564	1,620
Service bureau fees	347	229
Advertising	33	24
FDIC assessment	211	184
Professional services	1,730	1,347
Other	813	794
Total Non-Interest Expenses	11,861	11,181
Income before Income Taxes	6,646	4,490
Income Tax Expense	1,811	1,768
Net Income	$ 4,835	$ 2,722
Earnings per share:
Basic (in dollars per share)	$ 0.90	$ 0.49
Diluted (in dollars per share)	$ 0.90	$ 0.48

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($)		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Net income		$ 4,835,000	$ 2,722,000
Defined benefit pension plans:
Actuarial loss arising during period, net of tax of $- and $- for year ended December 31, 2018 and 2017, respectively		0	0
Reclassification adjustment for prior service cost included in net income, net of tax of $- and $- for the year ended December 31, 2018 and 2017, respectively [Note A]	[1]	0	0
Reclassification adjustment for net actuarial loss included in net income, net of tax of $- and ($81) for the year ended December 31, 2018 and 2017, respectively [Note B]	[2]	0	122,000
Other comprehensive income		0	122,000
Comprehensive income		4,835,000	2,844,000
Directors' Compensation [Member]
Defined benefit pension plans:
Gross amount of actuarial (gain) loss amortization		$ 0	$ 203,000
[1]	Note A: The gross amount of prior service cost amortization is recorded in Directors' Compensation. The related tax impact is recorded in income tax expense.
[2]	Note B: The gross amount of actuarial (gain) loss amortization is recorded in Directors' Compensation, $0 and $203, respectively. The related tax expense is recorded in income tax expense.

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Actuarial loss arising during period, tax	$ 0	$ 33
Reclassification adjustment for prior service cost included in net income, tax	0	5
Reclassification adjustment for net actuarial loss included in net income, tax	$ (81)	$ (10)

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Unallocated Common Stock Heldby ESOP [Member]	AOCI Attributable to Parent [Member]
Beginning balance at Dec. 31, 2016	$ 73,185,000	$ 57,000	$ 51,809,000	$ 23,370,000	$ (1,929,000)	$ (122,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,722,000			2,722,000
Other comprehensive income, net of tax	122,000					122,000
Allocation of ESOP stock	265,000		78,000		187,000
Repurchased stock	(3,787,000)	(2,000)	(3,785,000)
Exercise of stock options	2,578,000	3,000	2,575,000
Stock-based compensation	391,000		391,000
Cash paid for common stock dividend	(2,451,000)			(2,451,000)
Ending balance at Dec. 31, 2017	73,025,000	58,000	51,068,000	23,641,000	(1,742,000)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	4,835,000			4,835,000
Other comprehensive income, net of tax	0
Allocation of ESOP stock	329,000		219,000		110,000
Repurchased stock	(7,030,000)	(4,000)	(7,026,000)
Exercise of stock options	137,000		137,000
Stock-based compensation	328,000		328,000
Cash paid for common stock dividend	(4,978,000)			(4,978,000)
Ending balance at Dec. 31, 2018	$ 66,646,000	$ 54,000	$ 44,726,000	$ 23,498,000	$ (1,632,000)	$ 0

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Stockholders' Equity (Parentheticals) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Cash paid for common stock dividend (in usd per share)	$ 0.905	$ 0.425
Common Stock [Member]
Repurchased stock (in shares)	218,631	242,379
Exercise of stock options (in shares)	273,081	3,138

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Cash Flows from Operating Activities
Net income	$ 4,835	$ 2,722
Adjustments to reconcile net income to net cash provided by operating activities:
Net (accretion) of securities premiums and discounts and deferred loan fees and costs	(118)	(137)
Depreciation and amortization of premises and equipment	573	556
Stock-based compensation and allocation of ESOP stock	657	654
Provision for loan losses	240	1,185
Deferred income taxes	293	513
Income from bank owned life insurance	(388)	(413)
Increase in accrued interest receivable	(8)	(229)
Decrease (increase) in other assets	129	(204)
(Decrease) increase in other liabilities	(490)	251
Net Cash Provided by Operating Activities	5,723	4,898
Activity in held to maturity securities:
Purchases	(8,969)	(1,182)
Maturities, calls and principal repayments	7,898	6,727
Net increase in loans receivable	(54,406)	(44,873)
Purchased participation loans	(7,096)	(80,535)
Proceeds from participations/sale of loans	32,563	19,039
Purchase of bank premises and equipment	(55)	(297)
Purchase of Federal Home Loan Bank of New York stock	(27,356)	(16,404)
Redemption of Federal Home Loan Bank of New York stock	24,731	15,706
Net Cash Used by Investing Activities	(32,690)	(101,819)
Cash Flows from Financing Activities
Net (decrease) increase in deposits	(28,334)	86,614
Advances from Federal Home Loan Bank of New York	66,600	25,000
Repayment of advances from Federal Home Loan Bank of New York	(10,000)	(10,000)
Increase (decrease) in advance payments by borrowers for taxes and insurance	63	(106)
Cash dividends paid to stockholders	(4,978)	(2,451)
Net exercise of options and repurchase of shares	(53)	(1,672)
Proceeds from exercise of stock options	0	571
Repurchase of common stock	(6,840)	(108)
Net Cash Provided by Financing Activities	16,458	97,848
Net (decrease) increase in Cash and Cash Equivalents	(10,509)	927
Cash and Cash Equivalents – Beginning	22,309	21,382
Cash and Cash Equivalents – Ending	11,800	22,309
Supplementary Cash Flows Information
Interest paid	5,407	3,423
Income taxes paid	1,436	1,016
Loan receivable transferred to other real estate	$ 0	$ 0

Organization and Business

Organization and Business	12 Months Ended
	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Business	Organization and Business MSB Financial Corp. (the "Company") is a Maryland-chartered corporation organized in 2014 to be the successor to MSB Financial Corp., a federal corporation ("Old MSB") upon completion of the second-step conversion of Millington Bank (the "Bank") from the two-tier mutual holding company structure to the stock holding company structure. MSB Financial, MHC (the "MHC") was the former mutual holding company for Old MSB prior to completion of the second-step conversion. In conjunction with the second-step conversion, each of the MHC and Old MSB ceased to exist. The second-step conversion was completed on July 16, 2015 at which time the Company sold 3,766,592 shares of its common stock (including 150,663 shares purchased by the Bank's employee stock ownership plan) at $10.00 per share for gross proceeds of approximately $37.7 million . Expenses related to the stock offering totaled $1.5 million and were netted against proceeds. As part of the second-step conversion, each of the outstanding shares of common stock of Old MSB held by persons other than the MHC were converted into 1.1397 shares of Company common stock with cash paid in lieu of fractional shares. As a result, a total of 2,187,242 additional shares were issued in the second-step conversion. As a result of the second-step conversion, all share and per share information has subsequently been revised to reflect the 1.1397 exchange ratio unless otherwise noted. The Company's principal business is the ownership and operation of the Bank. The Bank is a New Jersey-chartered stock savings bank and its deposits are insured by the Federal Deposit Insurance Corporation. The primary business of the Bank is attracting retail deposits from the general public and using those deposits together with funds generated from operations, principal repayments on securities and loans and borrowed funds, for its lending and investing activities. The Bank's loan portfolio primarily consists of one-to-four family and home equity residential loans, commercial real estate loans, commercial loans, and construction loans. It also invests in U.S. government obligations and mortgage-backed securities. The Bank is regulated by the New Jersey Department of Banking and Insurance and the Federal Deposit Insurance Corporation. The Board of Governors of the Federal Reserve System (the "Federal Reserve") regulates the Company as a bank holding company. The primary business of Millington Savings Service Corp (the "Service Corp"), the Bank's wholly-owned subsidiary, was the ownership and operation of a single commercial rental property. This property was sold during the year ended June 30, 2007. Currently the Service Corp is inactive.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Consolidated Financial Statement Presentation The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries, the Bank and the Bank's wholly owned subsidiary, the Service Corp. All significant intercompany accounts and transactions have been eliminated in consolidation. The consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America ("GAAP"). In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the dates of the consolidated statements of financial condition and revenues and expenses for the periods then ended. Actual results could differ significantly from those estimates. Cash and Cash Equivalents Cash and cash equivalents include cash and amounts due from depository institutions and interest-bearing deposits with banks with original maturities of six months or less. Securities Investments in debt securities that the Company has the positive intent and ability to hold to maturity are classified as held to maturity securities and reported at amortized cost. Debt securities that are bought and held principally for the purpose of being sold in the near term are classified as trading securities and reported at fair value, with unrealized holding gains and losses included in earnings. Debt securities not classified as trading securities or as held to maturity securities are classified as available for sale securities and reported at fair value, with unrealized holding gains or losses, net of applicable income taxes, reported in a separate component of stockholders' equity. The Company had no trading or available for sale securities as of December 31, 2018 and 2017 . Beginning in 2018, equity investments are measured at fair value with changes in fair value recognized in net income. The Company had no equity investments with changes in fair value recorded in net income at December 31, 2018 . Individual securities are considered impaired when their fair value is less than amortized cost. Management evaluates all securities with unrealized losses quarterly to determine if such impairments are "temporary" or "other-than-temporary" in accordance with applicable accounting guidance. Accordingly, the Company accounts for temporary impairments based upon a security's classification as trading, available for sale or held to maturity. Temporary impairments on available for sale securities are recognized, on a tax-effected basis, through other comprehensive income (loss) with offsetting entries adjusting the carrying value of the security and the balance of deferred taxes. Temporary impairments of held to maturity securities are not recognized in the consolidated financial statements; however, information concerning the amount and duration of impairments on held to maturity securities is disclosed in the notes to the consolidated financial statements. The carrying value of securities held in the trading portfolio is adjusted to fair value through earnings on a monthly basis. Other-than-temporary impairments on securities that the Company has decided to sell or will more likely than not be required to sell prior to the full recovery of their fair value to a level equal to or exceeding amortized cost are recognized in earnings. Otherwise, the other-than-temporary impairment is bifurcated into credit-related and noncredit-related components. The credit-related impairment generally represents the amount by which the present value of the cash flows expected to be collected on the debt security falls below its amortized cost. The noncredit-related component represents the remaining portion of the impairment not otherwise designated as credit-related. Credit-related other-than-temporary impairments are recognized in earnings while noncredit-related other-than-temporary impairments are recognized, net of deferred taxes, in other comprehensive income (loss). The Company reviews its investment portfolio on a quarterly basis for indications of impairment. This review includes analyzing the length of time and the extent to which the fair value of a security has been lower than the cost, and the financial condition and near-term prospects of the issuer, including any specific events which may influence the operations of the issuer. The Company also assesses its intent with regard to selling or holding each security as well as any conditions which may require the sale of security prior to the recovery of fair value to a level which equals or exceeds amortized cost. Discounts and premiums on securities are accreted/amortized to maturity by use of the level-yield method. Gain or loss on sales of securities is based on the specific identification method. Concentration of Risk The Bank's lending activities are concentrated in loans secured by real estate located in the State of New Jersey. Loans Receivable Loans are stated at their outstanding unpaid principal balances, net of an allowance for loan losses and any deferred fees or costs. Interest income is accrued on the unpaid principal balance. Loan origination fees, net of certain direct loan origination costs, are deferred and recognized as an adjustment of the yield (interest income) of the related loans. The Company is generally amortizing these amounts based on the effective interest method. Allowance for Credit Losses The allowance for credit losses consists of the allowance for loan losses and the reserve for unfunded lending commitments. The allowance for loan losses represents management's estimate of probable incurred losses in the loan portfolio as of the statement of financial condition date and is recorded as a reduction to loans. The reserve for unfunded lending commitments represents management's estimate of probable incurred losses in its unfunded loan commitments and is recorded in other liabilities, when required, on the consolidated statement of financial condition. The allowance for credit losses is increased by the provision for loan losses, and decreased by charge-offs, net of recoveries. All, or part, of the principal balance of loans receivable that are deemed uncollectible are charged against the allowance for loan losses when management determines that the repayment of that amount is highly unlikely. Any subsequent recoveries are credited to the allowance for loan losses. Non-residential consumer loans are generally charged off no later than 120 days past due on a contractual basis, earlier in the event of bankruptcy, or if there is an amount deemed uncollectible. The allowance for loan losses is maintained at a level considered adequate to provide for losses that can be reasonably anticipated. Management performs a quarterly evaluation of the adequacy of the allowance. The allowance is based on the Company's three year loan loss experience, known and probable incurred losses in the portfolio, adverse situations that may affect the borrower's ability to repay, the estimated value of any underlying collateral, the composition of the loan portfolio, current economic conditions and other relevant factors. This evaluation is inherently subjective as it requires material estimates that may be susceptible to significant revision as more information becomes available. For additional detail regarding the allowance for loan losses, see Note 4 to the Consolidated Financial Statements. Other Real Estate Owned ("OREO") Other real estate owned represents real estate acquired through formal foreclosure or by taking possession of the real estate and is initially recorded at the lower of cost or fair value, less estimated selling costs establishing a new cost basis. Write-downs required at the time of acquisition are charged to the allowance for loan losses. Thereafter, the Company maintains an allowance for decreases in the property's estimated fair value, through charges to earnings. Such charges are included in other non-interest expense along with any additional property maintenance. There was no OREO at December 31, 2018 and 2017 . We may obtain physical possession of residential and commercial real estate collateralizing consumer and commercial mortgage loans via foreclosure or in-substance repossession. As of December 31, 2018 , we had consumer loans with a carrying value of $708,000 collateralized by residential real estate property for which formal foreclosure proceedings were in process. Premises and Equipment Premises and equipment are comprised of land, at cost, and buildings, building improvements, furnishings and equipment and leasehold improvements, at cost, less accumulated depreciation and amortization. Depreciation and amortization charges are computed on the straight-line method over the following estimated useful lives: Years Building and improvements 5 - 50 Furnishings and equipment 3 – 7 Leasehold improvements Shorter of useful life Significant renewals and betterments are capitalized to the premises and equipment account. Maintenance and repairs are charged to operations in the year incurred. Rental income is netted against occupancy costs in the consolidated statements of income. Federal Home Loan Bank Stock Federal law requires a member institution of the Federal Home Loan Bank ("FHLB") system to hold restricted stock of its district's FHLB according to a predetermined formula based on advances available and outstanding. The restricted stock is carried at cost. Management's determination of whether these shares are impaired is based on an 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. Management believes no impairment charge was necessary related to the FHLB restricted stock during the years ended December 31, 2018 and 2017 . Bank Owned Life Insurance Bank owned life insurance is carried at net cash surrender value. The change in the net cash surrender value is recorded as a component of non-interest income. Defined Benefit Plans In accordance with applicable guidance prescribed in Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) 715, "Compensation – Retirement Benefits", the Company recognizes the over-funded or under-funded status of a defined benefit postretirement plan as an asset or liability in the consolidated statement of financial condition, with changes in the funded status recorded through other comprehensive income (loss) in the year in which those changes occur. The funded status of the plan is calculated using actuarial concepts which involve making assumptions regarding discount rate, mortality, expected rate of compensation increases and others. Stock-based Compensation Plans In accordance with FASB ASC 718, "Compensation – Stock Compensation", the Company recognizes compensation expense for the total of the fair value of all share-based compensation awards granted over the requisite service periods. In addition, ASC 718 requires that cash flow activity be reported on a financing rather than an operating cash flow basis for the benefits, if any, of realized tax deductions in excess of previously recognized tax benefits on compensation expense. Advertising The Company expenses advertising and marketing costs as incurred. Income Tax Expense The Company and its subsidiaries file a consolidated federal income tax return. Federal income taxes are allocated based on the contribution of their respective income or loss to the consolidated income tax return. Separate state income tax returns are filed. Federal and state income taxes have been provided for these consolidated financial statements on the basis of reported income. The amounts reflected on the income tax returns differ from these provisions due principally to temporary differences in the reporting of certain items of income and expense for financial reporting and income tax reporting purposes. Deferred income taxes are recorded to recognize such temporary differences. The Company follows the provisions of FASB ASC 740, "Income Taxes", formerly FASB Interpretation No. 48, "Accounting for Uncertainty in Income Taxes ("FIN48"). ASC 740 prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return, and also provides guidance on derecognizing, classification, interest and penalties, accounting in interim periods, disclosure and transition. As a result of the Company's evaluation under ASC 740, no significant income tax uncertainties have been identified. Therefore, the Company recognized no adjustment for unrecognized income tax benefits for the years ended December 31, 2018 and 2017 . The Company's policy is to recognize interest and penalties on unrecognized tax benefits in income tax expense in the consolidated statement of income. The Company did not recognize any interest and penalties for the years ended December 31, 2018 and 2017 . The tax years subject to examination by the taxing authorities are the years ended December 31, 2018 , 2017 , 2016 and 2015. Off-Balance Sheet Credit-Related Financial Instruments In the ordinary course of business, the Company enters into commitments to extend credit, including commitments under lines of credit. Such financial instruments are recorded when they are funded. Earnings per Share Basic earnings per share is computed by dividing net income by the weighted average number of common shares outstanding, exclusive of the Employee Stock Ownership Plan ("ESOP") shares not yet committed to be released. Diluted earnings per share is calculated by adjusting the weighted average number of shares of common stock outstanding to include the effect of contracts or securities exercisable (such as stock options) or which could be converted into common stock, if dilutive, using the treasury stock method. The following table shows the computation of basic and diluted earnings per share: Year Ended December 31, (In Thousands, Except Per Share Data) 2018 2017 Numerator: Net income $ 4,835 $ 2,722 Denominator: Weighted average common shares 5,351 5,550 Dilutive potential common shares 49 95 Weighted average fully diluted shares 5,400 5,645 Earnings per share: Basic $ 0.90 $ 0.49 Dilutive $ 0.90 $ 0.48 Outstanding common stock equivalents having no dilutive effect — — Other Comprehensive Income Other comprehensive income includes benefit plan's amounts recognized under ASC 715, "Compensation-Retirement Benefits". This item of other comprehensive income reflects, net of tax, prior service costs and unrealized net losses that had not been recognized in the consolidated financial statements prior to the implementation of ASC 715 along with actuarial losses arising during the current period. Recent Accounting Pronouncements In May 2014, the FASB issued Accounting Standards Update (ASU) No. 2014-9, "Revenue from Contracts with Customers (ASU 2014-9)", which supersedes nearly all existing revenue recognition guidance under GAAP. The core principle of ASU 2014-9 is to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration to which an entity expects to be entitled for those goods or services. ASU 2014-9 defines a five-step process to achieve this core principle and, in doing so, more judgment and estimates may be required within the revenue recognition process than are required under existing GAAP. The FASB also subsequently issued ASUs Nos. 2016-8, 2016-10, 2016-12, 2016-20 and 2017-5 to augment, amend and clarify the original pronouncement. The Company evaluated all of its revenue streams and determined that the majority of its revenue is derived from financial instruments that are scoped out. In addition, non-interest revenue streams were evaluated, including deposit and service charges and interchange fees. The Company adopted ASU 2014-9 on January 1, 2018 and it did not materially change the timing of recognition of our current revenue sources. Accordingly, no cumulative effect adjustment was recorded under the modified retrospective transition method. In January 2016, the FASB issued ASU No. 2016-1, "Financial Instruments - Overall." The guidance in this ASU among other things, (1) requires equity investments with certain exceptions, to be measured at fair value with changes in fair value recognized in net income, (2) simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment, (3) eliminates the requirement for public businesses entities to disclose the methods and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet, (4) requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes, (5) requires an entity to present separately in other comprehensive income the portion of the change in fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments, (6) requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or the accompanying notes to the financial statements and (7) clarifies that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale securities. The guidance in this ASU is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The adoption of this guidance effective January 1, 2018, did not have a material impact on our consolidated financial statements, but did change the disclosure requirements in Note 15 - Fair Value Measurements. In February 2016, the FASB issued ASU No. 2016-2, "Leases" (Topic 842). This ASU revises the accounting related to lessee accounting. Under the new guidance, lessees will be required to recognize a right-of-use asset and a lease liability for all leases. The new lease guidance also simplified the accounting for sale and leaseback transactions primarily due to the recognition of lease assets and lease liabilities. ASU 2016-2 is effective for the first interim period within annual periods beginning after December 15, 2018, with early adoption permitted. The standard is required to be adopted using the modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The adoption of ASC 842 will result in the recognition of a right-of-use (ROU) asset of $1.3 million and a lease liability of $1.3 million on our Consolidated Statements of Financial Condition. We will provide additional detail to our leases disclosures on a prospective basis, beginning in the first quarter of 2019. In June 2016, the FASB issued ASU No. 2016-13, "Measurement of Credit Losses on Financial Instruments." This ASU requires credit losses on most financial assets measured at amortized cost and certain other instruments to be measured using an expected credit loss model. Under this model, entities will estimate credit losses over the entire contractual term of the instrument. The standard is effective for public companies in annual and interim periods in fiscal years beginning after December 15, 2019. Early adoption is permitted, including adoption in the interim or annual period provided that the entire standard is adopted. We are currently evaluating the impact of ASU 2016-13 on our consolidated financial statements. We have taken steps to begin preparations for implementation, such as evaluating changes to our current loss recognition model and evaluating the potential use of outside professionals for an updated model.

Securities Held to Maturity

Securities Held to Maturity	12 Months Ended
	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Securities Held to Maturity	Securities Held to Maturity The amortized cost of securities held to maturity and their fair values are summarized as follows: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (In thousands) December 31, 2018: U.S. Government agencies $ 8,000 $ 11 $ 18 $ 7,993 Mortgage-backed securities 23,936 142 299 23,779 Corporate bonds 6,500 — 736 5,764 State and political subdivisions 1,040 — 7 1,033 $ 39,476 $ 153 $ 1,060 $ 38,569 December 31, 2017: U.S. Government agencies $ 5,500 $ — $ 42 $ 5,458 Mortgage-backed securities 23,839 263 207 23,895 Corporate bonds 7,012 6 243 6,775 State and political subdivisions 1,196 1 5 1,192 Certificates of deposits 935 1 1 935 $ 38,482 $ 271 $ 498 $ 38,255 All mortgage-backed securities at December 31, 2018 and 2017 have been issued by FNMA, FHLMC or GNMA and are secured by 1-4 family residential real estate. The amortized cost and fair value of securities held to maturity at December 31, 2018 , by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. (In thousands) Amortized Cost Fair Value U.S. Government agencies: Due within one year $ 2,000 $ 1,982 Due after one year through five years — — Due after five through ten years 3,000 3,002 Due thereafter 3,000 3,009 8,000 7,993 Mortgage-backed securities Due within one year 898 891 Due after one year through five years 15,563 15,539 Due after five through ten years 3,241 3,150 Due thereafter 4,234 4,199 23,936 23,779 Corporate Bonds Due within one year — — Due after one year through five years 1,500 1,487 Due after five years through ten years 1,000 910 Due thereafter 4,000 3,367 6,500 5,764 State and political subdivisions Due within one year 161 160 Due after one year through five years 697 692 Due after five years through ten years 182 181 1,040 1,033 $ 39,476 $ 38,569 There were no sales of securities held to maturity during the years ended December 31, 2018 and 2017 . At December 31, 2018 and 2017 , securities held to maturity with a fair value of approximately $2 million and $1 million, respectively, were pledged to secure public funds on deposit. The following table provides the gross unrealized losses and fair value of securities in an unrealized loss position, by the length of time that such securities have been in a continuous unrealized loss position: Less than 12 Months More than 12 Months Total Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses (In thousands) December 31, 2018: U.S. Government agencies $ — $ — $ 1,982 $ 18 $ 1,982 $ 18 Mortgage-backed securities 8 1 15,205 298 15,213 299 Corporate bonds 1,487 13 4,277 723 5,764 736 State and political subdivisions 180 1 853 6 1,033 7 $ 1,675 $ 15 $ 22,317 $ 1,045 $ 23,992 $ 1,060 December 31, 2017: U.S. Government agencies $ 1,000 $ 1 $ 4,458 $ 41 $ 5,458 $ 42 Mortgage-backed securities 7,796 88 5,558 119 13,354 207 Corporate bonds — — 4,756 243 4,756 243 State and political subdivisions 655 5 — — 655 5 Certificates of deposits 245 1 — — 245 1 $ 9,696 $ 95 $ 14,772 $ 403 $ 24,468 $ 498 At December 31, 2018 , management concluded that the unrealized losses above (which related to two U.S. Government agency bonds, twenty mortgage-backed securities, five corporate bonds and six state and political subdivision bonds, compared to five U.S. Government agency bonds, sixteen mortgage-backed securities, three corporate bonds, four state and political subdivision bonds, and one certificate of deposit, at December 31, 2017 , were temporary in nature since they were not related to the underlying credit quality of the issuer. The Company does not intend to sell these securities and it is not more-likely-than-not that the Company would be required to sell these securities prior to the full recovery of fair value to a level which equals or exceeds amortized cost. The losses above are primarily related to market interest rate conditions and are considered noncredit related and temporary.

Loans Receivable and Allowance

Loans Receivable and Allowance for Loan Losses	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Loans Receivable and Allowance for Loan Losses	Loans Receivable and Allowance for Loan Losses The composition of total loans receivable at December 31, 2018 and 2017 was as follows: At At (In thousands) Residential mortgage: One-to-four family $ 143,391 $ 157,876 Home equity 24,365 26,803 167,756 184,679 Commercial and multi-family real estate 212,606 196,681 Construction 29,628 43,718 Commercial and industrial 108,602 73,465 350,836 313,864 Consumer: 540 618 Total loans receivable 519,132 499,161 Less: Loans in process 10,677 19,868 Deferred loan fees 501 474 Allowance for loan losses 5,655 5,414 Total adjustments 16,833 25,756 Loans receivable, net $ 502,299 $ 473,405 The commercial and industrial category is further segregated into secured of $60,426 and unsecured (high net worth) of $48,176 as of December 31, 2018. Allowance for Loan Losses The Company's loan portfolio is comprised of the following segments: residential mortgage, commercial real estate, construction, commercial and industrial and consumer. Some segments of the Company's loan receivable portfolio are further disaggregated into classes which allow management to more accurately monitor risk and performance. Accordingly, the methodology and allowance calculation includes the segmentation of the total loan portfolio. The residential mortgage loan segment is disaggregated into two classes: one-to-four family loans, which are primarily first liens, and home equity loans, which consist of first and second liens. The commercial real estate loan segment includes owner and non-owner occupied loans which have medium risk based on historical experience with these types of loans. The construction loan segment is further disaggregated into two classes: one-to-four family owner-occupied, which includes land loans, whereby the owner is known and there is less risk, and other, whereby the property is generally under development and tends to have more risk than the one-to-four family owner-occupied loans. The commercial and industrial loan segment consists of loans made for the purpose of financing the activities of commercial customers. The commercial and industrial loans carry a mix of loans secured by real estate and unsecured lines of credit some of which are for high net worth individuals. The consumer loan segment consists primarily of installment loans and overdraft lines of credit connected with customer deposit accounts. The allowance consists of specific, general and unallocated components. The specific component relates to loans that are classified as impaired. A loan is considered impaired when, based on current information and events, it is probable that the Company will be unable to collect the scheduled payments or principal or interest when due according to the contractual terms of the loan agreement. For loans that are classified as impaired, an allowance is established when the discounted cash flows (or collateral value or observable market price) of the impaired loan is lower than the carrying value of that loan. The general component covers pools of loans by loan class. These pools of loans are evaluated for loss exposure based upon historical loss rates for each of these classes of loans, adjusted for qualitative factors. These qualitative risk factors include: 1. Lending policies and procedures, including underwriting standards and collection, charge-off, and recovery practices. 2. National, regional, and local economic and business conditions as well as the condition of various market segments, including the value of underlying collateral for collateral dependent loans. 3. Nature and volume of the portfolio and terms of loans. 4. Experience, ability, and depth of lending management and staff. 5. Volume and severity of past due, classified and nonaccrual loans as well as other loan modifications. 6. Quality of the Company's loan review system, and the degree of oversight by the Company's Board of Directors. 7. Existence and effect of any concentrations of credit and changes in the level of such concentrations. 8. Effect of external factors, such as competition and legal and regulatory requirements. Each factor is assigned a value to reflect improving, stable or declining conditions based on management's best judgment using relevant information available at the time of the evaluation. Although management seeks to avoid intentionally creating an unallocated component, one will exist at times due to the dynamic interplay of balances, qualitative factors and other items that could impact management's estimate of probable losses. The unallocated component of the allowances reflects the margin of imprecision inherent in the underlying assumptions used in the methodologies for estimating specific and general losses in the portfolio. The following tables provide an analysis of the allowance for loan losses and the loan receivable balances, by the portfolio segment segregated into the amount required for loans individually evaluated for impairment and the amount required for loans collectively evaluated for impairment as of December 31, 2018 and 2017 : Year Ended December 31, 2018 (in thousands) Residential Mortgage Commercial and Multi-Family Real Estate Construction Commercial and Industrial Consumer Unallocated Total Allowance for loan losses: Balance, beginning $ 1,852 $ 2,267 $ 302 $ 710 $ 5 $ 278 $ 5,414 Provisions 255 (80 ) (80 ) 418 5 (278 ) 240 Loans charged-off — — — — (8 ) — (8 ) Recoveries 8 — — — 1 — 9 Balance, ending $ 2,115 $ 2,187 $ 222 $ 1,128 $ 3 $ — $ 5,655 Period-end allowance allocated to: Loans individually evaluated for impairment $ 326 $ 69 $ — $ 20 $ — $ — $ 415 Loans collectively evaluated for impairment 1,789 2,118 222 1,108 3 — $ 5,240 Ending balance $ 2,115 $ 2,187 $ 222 $ 1,128 $ 3 $ — $ 5,655 Period-end loan balances evaluated for: Loans individually evaluated for impairment $ 11,960 $ 2,411 $ — $ 243 $ — $ — $ 14,614 Loans collectively evaluated for impairment 155,746 209,879 18,905 108,270 540 — 493,340 Ending balance $ 167,706 $ 212,290 $ 18,905 $ 108,513 $ 540 $ — $ 507,954 Year Ended December 31, 2017 (in thousands) Residential Mortgage Commercial and Multi-Family Real Estate Construction Commercial and Industrial Consumer Unallocated Total Allowance for loan losses: Balance, beginning $ 1,808 $ 1,441 $ 248 $ 882 $ 6 $ 91 $ 4,476 Provisions 215 869 54 (143 ) 3 187 $ 1,185 Loans charged-off (178 ) (43 ) — (30 ) (4 ) — $ (255 ) Recoveries 7 — — 1 — — $ 8 Balance, ending $ 1,852 $ 2,267 $ 302 $ 710 $ 5 $ 278 $ 5,414 Period-end allowance allocated to: Loans individually evaluated for impairment $ — $ — $ — $ 27 $ 1 $ — $ 28 Loans collectively evaluated for impairment 1,852 2,267 302 683 4 278 5,386 Ending balance $ 1,852 $ 2,267 $ 302 $ 710 $ 5 $ 278 $ 5,414 Period-end loan balances evaluated for: Loans individually evaluated for impairment $ 12,609 $ 2,057 $ — $ 205 $ 1 $ — $ 14,872 Loans collectively evaluated for impairment 171,988 194,373 23,803 73,167 616 — 463,947 Ending balance $ 184,597 $ 196,430 $ 23,803 $ 73,372 $ 617 $ — $ 478,819 Nonaccrual and Past Due Loans For all classes of loans receivable, the accrual of interest is discontinued when the contractual payment of principal or interest has become 90 days past due or when management has serious doubts about further collectability of principal or interest, even though the loan is currently performing. Certain loans may remain on accrual status if they are in the process of collection and are either guaranteed or 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, including impaired 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 (generally six months) and the ultimate collectability of the total contractual principal and interest is no longer in doubt. The past due status of all classes of loans receivable is determined based on contractual due dates for loan payments. The following table represents the classes of the loans receivable portfolio summarized by aging categories of performing loans and nonaccrual loans as of December 31, 2018 and 2017 : As of December 31, 2018 30-59 Days Past Due and Still Accruing 60-89 Days Past Due and Still Accruing Greater than 90 Days and Still Accruing Total Past Due and Still Accruing Accruing Current Balances Nonaccrual Loans (1) Total Loans Receivables (In thousands) Residential Mortgage One-to-four family $ 1,328 $ 365 $ 2 $ 1,695 $ 139,371 $ 2,276 $ 143,342 Home equity 1,602 75 — 1,677 22,079 608 24,364 Commercial and multi-family real estate — — — — 211,258 1,032 212,290 Construction — — — — 18,905 — 18,905 Commercial and industrial — — — — 108,298 215 108,513 Consumer 1 — — 1 539 — 540 Total $ 2,931 $ 440 $ 2 $ 3,373 $ 500,450 $ 4,131 $ 507,954 (1) Nonaccrual loans at December 31, 2018 , included $2.2 million that were 90 days or more delinquent, $123,000 that were 60-89 days delinquent, $556,000 that were 30-59 days delinquent, and $1.2 million that were current or less than 30 days delinquent. As of December 31, 2017 30-59 Days Past Due and Still Accruing 60-89 Days Past Due and Still Accruing Greater than 90 Days and Still Accruing Total Past Due and Still Accruing Accruing Current Balances Nonaccrual Loans(1) Total Loans Receivables (In thousands) Residential Mortgage One-to-four family $ 1,221 $ 700 $ — $ 1,921 $ 152,425 $ 3,446 $ 157,792 Home equity 605 16 157 $ 778 25,912 115 26,805 Commercial and multi-family real estate — — — $ — 196,115 315 196,430 Construction — — — $ — 23,803 — 23,803 Commercial and industrial 68 — — $ 68 73,205 99 73,372 Consumer — 5 1 $ 6 611 — 617 Total $ 1,894 $ 721 $ 158 $ 2,773 $ 472,071 $ 3,975 $ 478,819 (1) Nonaccrual loans at December 31, 2017 , included $1.7 million that were 90 days or more delinquent, $341,000 that were 60-89 days delinquent, $631,000 that were 30-59 days delinquent, and $1.3 million that were current or less than 30 days delinquent. Impaired Loans Management evaluates individual loans in all of the loan segments (including loans in the residential mortgage and consumer segments) for possible impairment if the loan is either on nonaccrual status or is risk rated Substandard or worse or has been modified in a troubled debt restructuring ("TDR"). A loan is considered impaired when, based on current information and events, it is probable that the Company 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. Once the determination has been made that a loan is impaired, impairment is measured by comparing the recorded investment in the loan to one of the following: (a) the present value of expected cash flows (discounted at the loan's effective interest rate), (b) the loan's observable market price or (c) the fair value of collateral adjusted for expected selling costs. The method is selected on a loan by loan basis with management primarily utilizing the fair value of collateral method. The estimated fair values of the real estate collateral are determined primarily through third-party appraisals. When a real estate secured loan becomes impaired, a decision is made regarding whether an updated certified appraisal of the real estate is necessary. This decision is based on various considerations, including the age of the most recent appraisal, the loan-to-value ratio based on the original appraisal and the condition of the property. Appraised values are discounted to arrive at the estimated selling price of the collateral, which is considered to be the estimated fair value. The discounts also include estimated costs to sell the property. The estimated fair values of non-real estate collateral, such as accounts receivable, inventory and equipment, are determined based on the borrower's financial statements, inventory reports, accounts receivable aging schedules or equipment appraisals or invoices. Indications of value from these sources are generally discounted based on the age of the financial information or the quality of the assets. The evaluation of the need and amount of the allowance for impaired loans and whether a loan can be removed from impairment status is made on a quarterly basis. The Company's policy for recognizing interest income on impaired loans does not differ from its overall policy for interest recognition. The following tables provide an analysis of the impaired loans at December 31, 2018 and 2017 and the average balances of such loans for the years then ended: 2018 Recorded Investment Loans with No Related Reserve Loans with Related Reserve Related Reserve Contractual Principal Balance Average Loan Balances Residential mortgage One-to-four family $ 10,224 $ 1,956 $ 8,268 $ 298 $ 10,907 $ 10,392 Home equity 1,736 609 1,127 28 1,827 1,484 Commercial and multi-family real estate 2,411 1,405 1,006 69 3,067 2,059 Construction — — — — — — Commercial and industrial 243 223 20 20 262 149 Consumer — — — — — 1 Total $ 14,614 $ 4,193 $ 10,421 $ 415 $ 16,063 $ 14,085 2017 Recorded Investment Loans with No Related Reserve Loans with Related Reserve Related Reserve Contractual Principal Balance Average Loan Balances Residential mortgage One-to-four family $ 11,181 $ 11,181 $ — $ — $ 11,729 $ 12,256 Home equity 1,428 1,428 — — 1,522 1,335 Commercial and multi-family real estate 2,057 2,057 — — 2,680 1,787 Construction — — — — — — Commercial and industrial 205 173 32 27 242 296 Consumer 1 — 1 1 1 1 Total $ 14,872 $ 14,839 $ 33 $ 28 $ 16,174 $ 15,675 As of December 31, 2018 and 2017 , impaired loans listed above include $11.4 million, of loans previously modified in TDRs and as such are considered impaired under GAAP. As of December 31, 2018 and 2017 , $10.5 million and $9.7 million , respectively, of these loans have been performing in accordance with their modified terms for an extended period of time and as such were removed from nonaccrual status and considered performing. As of December 31, 2018 , interest income of $543,000 was recorded on impaired loans related to accruing TDRs. Credit Quality Indicators Management uses a nine point internal risk rating system to monitor the credit quality of the loans in the Company's commercial real estate, construction and commercial and industrial loan segments. The borrower's overall financial condition, repayment sources, guarantors and value of collateral, if appropriate, are evaluated annually or when credit deficiencies, such as delinquent loan payments, arise. The criticized rating categories utilized by management generally follow bank regulatory definitions. The Bank's rating categories are as follows: 1 – 5: The first five risk rating categories are considered not criticized, and are aggregated as "Pass" rated. 6: "Special Mention" category includes assets that are currently protected, but are potentially weak, resulting in increased credit risk and deserving management's close attention. If uncorrected, the potential weaknesses may result in deterioration of the repayment prospects. 7: "Substandard" loans have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt and have a distinct possibility that some loss will be sustained if the weaknesses are not corrected. This includes loans that are inadequately protected by the current sound net worth and paying capacity of the obligor or of the collateral pledged, if any. 8: "Doubtful" loans have all the weaknesses inherent in loans classified "Substandard" with the added characteristic that collection or liquidation in full, on the basis of current conditions and facts, is highly improbable. 9: "Loss" loans are considered uncollectible and subsequently charged off. The following table presents the classes of the loans receivable portfolio summarized by the aggregate "Pass" and the criticized categories of "Special Mention", "Substandard", "Doubtful" and "Loss" within the internal risk rating system as of December 31, 2018 and 2017 : As of December 31, 2018 Pass Special Mention Substandard Doubtful Loss Total (In thousands) Commercial and multi-family real estate $ 209,206 $ 1,367 $ 1,717 $ — $ — $ 212,290 Construction 18,905 — — — — 18,905 Commercial and industrial 108,025 69 419 — — 108,513 Total $ 336,136 $ 1,367 $ 1,717 $ — $ — $ 339,708 As of December 31, 2017 Pass Special Mention Substandard Doubtful Loss Total (In thousands) Commercial and multi-family real estate $ 193,982 $ 1,415 $ 1,033 $ — $ — $ 196,430 Construction 23,803 — — — — 23,803 Commercial and industrial 72,962 182 228 — — 73,372 Total $ 290,747 $ 1,415 $ 1,033 $ — $ — $ 293,605 Management further monitors the performance and credit quality of the retail portfolio by analyzing the age of the portfolio as determined by the length of time a recorded payment is past due. These credit quality indicators are assessed in the aggregate in these relatively homogeneous portfolios. Loans greater than 90 days past due are generally considered nonperforming and placed on nonaccrual status. Residential mortgage Consumer Total Residential and Consumer As of December 31, 2018 2017 2018 2017 2018 2017 (In thousands) Nonperforming $ 2,884 $ 3,718 $ — $ 1 $ 2,884 $ 3,719 Performing 164,822 180,879 540 616 $ 165,362 $ 181,495 Total $ 167,706 $ 184,597 $ 540 $ 617 $ 168,246 $ 185,214 Troubled Debt Restructurings Loans whose terms are modified are classified as a TDR if, in connection with the modification, the Company grants such borrowers concessions and it is deemed that those borrowers are experiencing financial difficulty. Concessions granted under a TDR generally involve a reduction in interest rate below market rates given the associated credit risk, or an extension of a loan's stated maturity date or capitalization of interest and/or escrow. Nonaccrual TDRs are restored to accrual status if principal and interest payments, under the modified terms, are current for six consecutive months after modification. Loans classified as TDRs are designated as impaired until they are ultimately repaid in full or foreclosed and sold. The nature and extent of impairment of TDRs, including those which experienced a subsequent default, is considered in the determination of an appropriate level of allowance for loan losses. The recorded investment balance of TDRs totaled $11.4 million at December 31, 2018 and December 31, 2017 . The majority of the Company's TDRs are on accrual status and totaled $10.5 million at December 31, 2018 versus $9.7 million at December 31, 2017 . The total of TDRs on nonaccrual status was $915,000 at December 31, 2018 and $1.7 million at December 31, 2017 . For the year ended December 31, 2018 , one loan was modified into a TDR. The Company refinanced a multi-family & commercial loan that was restructured to extend the maturity date and capitalize the interest. For the year ended December 31, 2017, the terms of thirteen loans were modified into six TDRs. The Company refinanced and consolidated a one-to-four family and one home equity mortgage loan which was restructured to an adjustable interest rate from a fixed interest rate. In addition, the Company restructured a one-to-four family loan, a home equity loan and a commercial line of credit. These loans were consolidated into one one-to-four family TDR with an extended maturity date. The Company restructured a commercial loan and a multi-family real estate loan into one TDR and extended the maturity date. The Company refinanced and consolidated a one-to-four family loan and three commercial loans into a multi-family and commercial loan with an adjustable interest rate from a fixed interest rate. In addition, the Company refinanced a one-to-four family loan and capitalized the interest. The Company restructured one commercial loan and extended the maturity date. The following tables summarize by class loans modified into TDRs during the year ended December 31, 2018 and 2017 : Year Ended Number of Contracts Pre-Modification Outstanding Recorded Investments Post-Modification Outstanding Recorded Investments (Dollars in thousands) Residential Mortgage One-to-four family — $ — $ — Home equity — — — Commercial and multi-family real estate 1 374 392 Commercial — — — Total 1 $ 374 $ 392 Year Ended Number of Contracts Pre-Modification Outstanding Recorded Investments Post-Modification Outstanding Recorded Investments (Dollars in thousands) Residential Mortgage One-to-four family 4 $ 1,019 $ 1,283 Home equity 2 99 — Commercial and multi-family real estate 1 419 661 Commercial 6 315 32 Total 13 $ 1,852 $ 1,976 A loan is considered to be in payment default once it is 90 days contractually past due under the modified terms. There were no loans modified in TDRs during the previous 12 months and for which there was a subsequent payment default for the years ended December 31, 2018 and 2017 .

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Premise and Equipment	Premises and Equipment The components of premises and equipment at December 31, 2018 and 2017 were as follows: At At (In thousands) Land $ 1,937 $ 1,937 Buildings and improvements 8,555 8,555 Leasehold improvements 1,430 1,430 Furnishings and equipment 3,070 2,988 Assets being developed for future use — 27 14,992 14,937 Accumulated depreciation and amortization (6,812 ) (6,239 ) $ 8,180 $ 8,698

Accrued Interest Receivable

Accrued Interest Receivable	12 Months Ended
	Dec. 31, 2018
Interest Receivable and Other Assets [Abstract]
Accrued Interest Receivable	Accrued Interest Receivable The components of interest receivable at December 31, 2018 and 2017 were as follows: At At (In thousands) Loans $ 1,504 $ 1,480 Securities held to maturity 111 127 $ 1,615 $ 1,607

Deposits

Deposits	12 Months Ended
	Dec. 31, 2018
Deposits [Abstract]
Deposits	Deposits Deposits at December 31, 2018 and 2017 consisted of the following classifications: At At Amount Average Rate Amount Average Rate (Dollars in thousands) Non-interest bearing demand $ 46,690 — % $ 36,919 — % Interest demand 134,123 1.01 155,199 0.71 Savings 102,740 0.63 105,106 0.33 Money market demand 16,171 0.78 27,350 0.59 Certificates of deposit 120,855 1.77 124,339 1.52 $ 420,579 1.01 % $ 448,913 0.78 % A summary of certificates of deposit by maturity at December 31, 2018 and 2017 is as follows: At At (Dollars in thousands) Within one year $ 39,790 $ 41,198 One to two years 34,407 23,396 Two to three years 31,947 18,676 Three to four years 10,552 27,266 Four to five years 2,949 12,302 Thereafter 1,210 1,501 $ 120,855 $ 124,339 The aggregate amount of certificates of deposit with a minimum denomination of $250,000 was approximately $18.1 million and $17.4 million at December 31, 2018 and 2017 , respectively. Generally, deposits in excess of $250,000 are not insured by the FDIC. A summary of interest expense on deposits for the years ended December 31, 2018 and 2017 is as follows: Year Ended December 31, 2018 2017 (Dollars in thousands) Interest demand and money market demand $ 1,257 $ 526 Savings and club 548 277 Certificates of deposit 2,029 1,647 $ 3,834 $ 2,450

Borrowings

Borrowings	12 Months Ended
	Dec. 31, 2018
Brokers and Dealers [Abstract]
Borrowings	Borrowings The Company participates in the FHLB of New York Overnight Advance Program. Advances under this program allow the Company to borrow up to the balance of its qualifying mortgage loans that have been pledged as collateral, less any related outstanding indebtedness. As of December 31, 2018 and 2017 , the Company had $149.9 million and $77.6 million , respectively, available for borrowing under this agreement. Term advances due to the FHLB of NY at December 31, 2018 and 2017 consisted of the following: Fixed Interest At December 31, Maturity Rate 2018 2017 (Dollars in thousands) March 5, 2018 3.46 % $ — $ 10,000 July 6, 2020 1.79 2,675 2,675 September 8, 2020 1.75 5,000 5,000 November 23, 2020 2.27 10,000 10,000 September 8, 2021 1.89 5,000 5,000 September 8, 2022 2.01 5,000 5,000 $ 27,675 $ 37,675 The advances are secured by a blanket assignment of unpledged and qualifying mortgage and commercial real estate loans. The Company had $66.6 million in overnight advances with the FHLB of NY at a rate of 2.60% as of December 31, 2018 and none as of December 31, 2017 . As of December 31, 2018 and 2017 , the Company had a $13.0 million unsecured line of credit with another financial institution. There were no amounts outstanding on the line as of December 31, 2018 and 2017 .

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2018
Stockholders' Equity Note [Abstract]
Stockholders' Equity	Stockholders' Equity Regulatory Capital The Bank is subject to various regulatory capital requirements administered by Federal and State banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory, and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company's financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Bank must meet specific capital guidelines that involve quantitative measures of the Bank's assets, liabilities, and certain off-balance-sheet items as calculated under regulatory accounting practices. The Bank's capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weighting, and other factors. The Federal Reserve Board approved final rules on Basel III in July 2013 establishing a new comprehensive capital framework for U.S. banks. Basel III substantially revised the risk-based capital requirements applicable to bank holding companies and depository institutions. The minimum regulatory capital requirements became effective for the Company and the Bank on January 1, 2015 and include a minimum common equity Tier 1 capital ratio of 4.50% of risk-weighted assets and raised the Tier 1 capital ratio from 4.00% to 6.00% of risk-weighted assets. The rules also require a minimum Total capital ratio of 8.00% of risk-weighted assets and a minimum Tier 1 leverage capital ratio of 4.00% of average assets. The final rule also established a new capital conservation buffer, comprised of common equity Tier 1 capital, above the regulatory minimum capital requirements. The phase-in of the capital conservation buffer began on January 1, 2016 at 0.625% of risk-weighted assets and increases each subsequent year by an additional 0.625% until reaching its final level of 2.5% on January 1, 2019. For 2018, the capital conservation buffer was 1.875% . Pursuant to the Federal Reserve’s Small Bank Holding Company Policy Statement, a bank holding company such as the Company with consolidated assets under $3 billion is exempt from regulatory capital requirements provided that: (i) it is not engaged in significant non-banking or off-balance sheet activities; (ii) it does not have a material amount of debt or equity securities registered with the SEC; and (iii) its bank subsidiary is well capitalized. As a result, the minimum capital requirements are not applicable to MSB Financial Corp. as of December 31, 2018 . As of December 31, 2018 , the most recent notification from the regulators categorized the Bank as well capitalized under the regulatory framework for prompt corrective action. There are no conditions or events since that notification that management believes have changed the institution's category. The following table presents a reconciliation of GAAP capital and regulatory capital and information as to the Bank's capital levels at the dates presented: Actual For capital adequacy purposes (1) To be well capitalized under prompt corrective action provisions Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) December 31, 2018: Tier 1 leverage capital ratio Millington Bank $ 61,740 10.71 % $ 23,052 ≥4.00 $ 28,816 ≥5.00 MSB Financial Corp. 66,646 11.56 N/A N/A N/A N/A Common equity tier 1 capital ratio Millington Bank 61,740 11.90 23,351 ≥4.50 33,729 ≥6.50 MSB Financial Corp. 66,646 12.84 N/A N/A N/A N/A Tier 1 capital ratio Millington Bank 61,740 11.90 31,134 ≥6.00 41,512 ≥8.00 MSB Financial Corp. 66,646 12.84 N/A N/A N/A N/A Total capital ratio Millington Bank 67,467 13.00 41,512 ≥8.00 51,891 ≥10.00 MSB Financial Corp. 72,373 13.95 N/A N/A N/A N/A (1) Amounts and ratios do not include the capital conservation buffer. Actual For capital adequacy purposes (1) To be well capitalized under prompt corrective action provisions Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) December 31, 2017: Tier 1 leverage capital ratio Millington Bank $ 58,843 10.72 % $ 21,951 ≥4.00 $ 27,439 ≥5.00 MSB Financial Corp. 73,025 13.31 21,952 ≥4.00 N/A N/A Common equity tier 1 capital ratio Millington Bank 58,843 11.98 22,098 ≥4.50 31,919 ≥6.50 MSB Financial Corp. 73,025 14.87 22,098 ≥4.50 N/A N/A Tier 1 capital ratio Millington Bank 58,843 11.98 29,463 ≥6.00 39,285 ≥8.00 MSB Financial Corp. 73,025 14.87 29,463 ≥6.00 N/A N/A Total capital ratio Millington Bank 64,304 13.10 39,285 ≥8.00 49,106 ≥10.00 MSB Financial Corp. 78,486 15.98 39,285 ≥8.00 N/A N/A (1) Amounts and ratios do not include the capital conservation buffer. Common Stock Repurchase Plan The Company announced that on June 2, 2016 it had received the non-objection of the Federal Reserve Bank of New York to purchase up to 112,600 shares of the Company's common stock in order to fund future awards of restricted stock that may be made under the Company's 2016 Equity Incentive Plan that was approved by stockholders at the Annual Meeting of Stockholders held on April 22, 2016. On August 4, 2016, the Company announced that it had approved a stock repurchase plan to purchase up to 595,342 shares of the Company's common stock. On December 17, 2018, the Company announced that it had approved a stock repurchase plan to repurchase up to 273,150 shares, approximately 5% of the outstanding shares of the Company's common stock. During the year ended December 31, 2017, the Company did not repurchase any additional shares under any previously-announced plans. During the year ended December 31, 2018, the Company repurchased 373,948 shares of Company's common stock with an average price of $17.95 .

Lease Commitments and Total Ren

Lease Commitments and Total Rental Expense	12 Months Ended
	Dec. 31, 2018
Leases [Abstract]
Lease Commitments and Total Rental Expense	Lease Commitments and Total Rental Expense The Company leases two branches and one loan office location under long-term operating leases. Future minimum lease payments by year and in the aggregate, under non-cancellable operating leases with initial or remaining terms of one year or more, consisted of the following at December 31, 2018 : (in thousands) At Within one year $ 358 One to two years 332 Two to three years 289 Three to four years 198 Four to five years 203 1,380 Thereafter 154 $ 1,534 The total rental expense for all leases was approximately $510,000 and $478,000 for the years ended December 31, 2018 and 2017 .

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The total tax expense consisted of the following for the years ended December 31, 2018 and 2017 : Year Ended December 31, 2018 2017 (In thousands) Current income tax expense: Federal $ 1,000 $ 957 State 518 298 1,518 1,255 Deferred income tax expense (benefit): Federal 180 550 State 113 (37 ) 293 513 $ 1,811 $ 1,768 A reconciliation of the statutory federal income tax at a rate of 21% and 34% , respectively, to the income tax expense included in the statements of income for the year ended December 31, 2018 and 2017 is as follows: Year ended December 31, 2018 2017 Amount % of Pretax Income Amount % of Pretax Income Federal income tax at statutory rate $ 1,396 21.0 % $ 1,526 34.0 % State tax, net of federal benefit 498 7.5 172 3.8 Bank Owned Life Insurance (81 ) (1.2 ) (140 ) (3.1 ) ESOP and stock-based compensation (11 ) (0.2 ) (486 ) (10.8 ) Impact of rate change on net deferred tax assets — — 678 15.1 Other 9 0.2 18 0.4 $ 1,811 27.3 % $ 1,768 39.4 % During the year ended December 31, 2017, certain directors, executive officers and directors emeriti executed options to purchase 212,468 shares of common stock at a per share exercise price of $9.4323 . In lieu of issuing shares of common stock upon the exercise of such options, the Company made a cash payment to such optionees equal to the excess of the closing price of the common stock on the Nasdaq Stock Market on August 4, 2017 of $17.30 over the per share exercise price of such options of $9.4323 multiplied by the number of options being exercised. An aggregate of $1.7 million was paid to the optionees. In addition, the change in tax rate included a permanent tax deduction for the year ended December 31, 2017 period due to restricted stock that vested. The impact of the corporate tax rate change on the net deferred tax assets was attributable to the revaluation of the Company's deferred tax asset as a result of the passage of the Tax Cuts and Jobs Act on December 22, 2017 which significantly reduced corporate tax rates. As a result, the Company recorded an additional tax provision of $678,000 for the revaluation for the year ended December 31, 2017 . The components of the net deferred tax asset at December 31, 2018 and 2017 were as follows: At December 31, At December 31, 2018 2017 (In thousands) Deferred tax assets: Allowances for losses on loans and commitments $ 1,610 $ 1,535 Uncollected interest 48 9 Benefit plans 127 533 Restricted stock award 38 36 Deferred Rent 16 — Accrued compensation 131 — Other 55 — 2,025 2,113 Deferred tax liabilities Depreciation (427 ) (423 ) Deferred loan costs (125 ) — Other (76 ) — (628 ) (423 ) Net deferred tax asset included in other assets $ 1,397 $ 1,690 At December 31, 2018, the Company had state net operating loss carryforwards of $1.5 million which begin to expire in 2030. Realization of deferred tax assets associated with net operating loss carryforwards is dependent upon generating sufficient taxable income prior to their expiration. A valuation allowance to reflect management’s estimate of the temporary deductible differences that may expire prior to their utilization has been recorded at December 31, 2018. The deferred tax asset and valuation allowance related to state net operating losses was $105,000 as of December 31, 2018. Retained earnings included $1.5 million at December 31, 2018 and 2017 for which no provision for income tax has been made. These amounts represent deductions for bad debt reserves for tax purposes which were only allowed to savings institutions which met certain definitional tests prescribed by the Internal Revenue Code of 1986, as amended (the "Code"). The Small Business Job Protection Act of 1996 (the "Act") eliminated the special bad debt deduction granted solely to thrifts. Under the terms of the Act, there would be no recapture of the pre-1988 (base year) reserves. However, these pre-1988 reserves would be subject to recapture under the rules of the Code if the Bank itself pays a cash dividend in excess of earnings and profits, or liquidates. The Act also provides for the recapture of deductions arising from the "applicable excess reserve" defined as the total amount of reserve over the base year reserve. The Bank's total reserve exceeds the base year reserve and deferred taxes have been provided for this excess.

Benefit Plans

Benefit Plans	12 Months Ended
	Dec. 31, 2018
Defined Benefit Plan [Abstract]
Benefit Plans	Benefit Plans Directors' Retirement Plan The Bank had a Directors' Retirement Plan, which provided that certain directors meeting specified age and service requirements may retire and continue to be paid. This plan was unfunded. Effective September 1, 2016, the Company terminated its Directors' Retirement Plan. The Company had between 12 and 24 months from the time the plan was terminated to distribute all funds to the plan's participants. The Company distributed the remaining Directors' Retirement Plan funds of $1.4 million during the month of January 2018. The following table sets forth the accumulated benefit obligation, the changes in the plan's projected benefit obligation and the plan's funded status as of and for each period presented. For the years ended December 31, 2018 2017 (Dollars in thousands) Accumulated benefit obligation – ending $ — $ 1,402 Projected benefit obligation – beginning $ 1,402 $ 1,466 Service cost — — Interest cost — 20 Actuarial (gain) loss — — Benefit payments (1,402 ) (84 ) Curtailment — — Projected benefit obligation – ending $ — $ 1,402 Plan assets at fair value – beginning $ — $ — Employer contribution — 84 Benefit payments — (84 ) Plan assets at fair value – ending $ — $ — Funded status at end of year (included in other liabilities) $ — $ 1,402 Assumptions: Discount rate N/A 1.41 % Rate of compensation increase N/A N/A Net periodic pension cost included the following: Years Ended December 31, 2018 2017 (Dollars in thousands) Service cost $ — $ — Interest cost — 20 Amortization of unrecognized loss — — Amortization of unrecognized past service liability — 202 Curtailment credit — — Net periodic pension cost $ — $ 222 Assumptions: Discount rate N/A 4.50% / 3.50% / 1.12% Rate of compensation N/A 3.00% / N/A 401(k) Savings Plan The Bank sponsors a savings and profit sharing plan, pursuant to Section 401(k) of the Code, for all eligible employees. Employees may elect to defer up to 80% of their compensation, subject to Code limitations. The Bank will match 50% of the first 6% of the employee's salary deferral up to a maximum of 3% of each employee's compensation. The Plan expense amounted to approximately $88,000 and $75,000 for the years ended December 31, 2018 and 2017 , respectively. Employee Stock Ownership Plan Effective upon completion of Old MSB's initial public stock offering in 2007, the Bank established the ESOP for all eligible employees who complete a twelve-month period of employment with the Bank, have attained the age of 21 and have completed at least 1,000 hours of service in a plan year. The ESOP used $2.0 million in proceeds from a term loan obtained from Old MSB to purchase 202,342 shares of Old MSB common stock. The term loan principal was payable over 48 equal quarterly installments through December 31, 2018. The interest rate on the term loan was 8.25% . On July 16, 2015, the Company completed a second-step stock conversion that included the purchase of 150,663 shares by the ESOP and the conversion of 202,342 shares of Old MSB's common stock at a conversion rate of 1.1397 to 230,609 shares of Company common stock bringing the total shares to 381,272 . The old term loan was refinanced into a new term loan in the amount of $2.3 million which included additional funds of $1.5 million to cover the cost of the newly purchased shares. The term loan principal is payable over 80 equal quarterly installments through June 30, 2035. The interest rate on the term loan is 3.25% . Each quarter, the Bank intends to make discretionary contributions to the ESOP, which will be equal to principal and interest payments required on the term loan. The ESOP may further pay down the loan with dividends paid, if any, on the Company common stock owned by the ESOP. Shares purchased with the loan proceeds provide collateral for the term loan and are held in a suspense account for future allocations among participants. Base compensation is the basis for allocation to participants of contributions to the ESOP and shares released from the suspense account, as described by the ESOP, in the year of allocation. ESOP shares pledged as collateral were initially recorded as unallocated ESOP shares in the consolidated statement of financial condition. On a monthly basis, 910 shares are allocated and compensation expense is recorded equal to the number of allocated shares multiplied by the monthly average market price of the Company's common stock and the allocated shares become outstanding for basic earnings per common share computations. The difference between the fair value of shares and the cost of the shares allocated by the ESOP is recorded as an adjustment to paid-in capital. ESOP compensation expense was approximately $210,000 and $265,000 for the years ended December 31, 2018 and 2017 , respectively. ESOP shares at December 31, 2018 and 2017 are summarized as follows: At At Allocated shares 190,882 179,956 Shares earned and committed to be released 10,926 10,926 Allocated and earned 201,808 190,882 Total ESOP shares 381,272 381,272 Fair value of unallocated shares $ 3,203,432 $ 3,388,942 Stock-Based Compensation After shareholder approval in 2016, the MSB Financial Corp. 2016 Equity Incentive Plan (the “2016 Plan”) became effective. In addition, the Company also has the MSB Financial Corp. 2008 Stock Compensation and Incentive Plan (the “2008 Plan”). No future awards are being granted under the 2008 Plan. The 2016 Plan will terminate on the tenth anniversary of its effective date, after which no awards may be granted. Collectively, the 2008 Plan and the 2016 Plan are referred to as Stock Option Plans. Under the 2016 Plan, the Company may grant options to purchase up to 281,499 shares of Company's common stock and issue up to 112,600 shares of restricted stock. At December 31, 2018 , there were 85,985 shares remaining for future option grants and 13,597 shares remaining for future restricted share grants under the plan. On July 16, 2015, the Company completed a second-step stock conversion that included the conversion of the stock options issued and outstanding under the 2008 Plan at a conversion rate of 1.1397 . As a result, the number of options outstanding was increased by the conversion factor and the exercise price per share was converted to $9.4323 . On August 4, 2017, certain directors, executive officers and directors emeriti executed options to purchase 212,468 shares of common stock at a per share exercise price of $9.4323 . In lieu of issuing shares of common stock upon the exercise of such options, the Company made a cash payment to such optionees equal to the excess of the closing price of the common stock on the Nasdaq Stock Market on August 4, 2017 of $17.30 over the per share exercise price of such options of $9.4323 multiplied by the number of options being exercised. An aggregate of $1.7 million was paid to the optionees. During 2018, options to purchase 10,556 shares of common stock at $17.65 per share were awarded and will expire no later than ten years following the grant date. The options granted vest over a five-year service period, with 20% of the awards vesting on each anniversary of the date of grant. The fair value of the options granted, as computed using the Black-Scholes option-pricing model, was determined to be $4.24 per option based upon the following underlying assumptions: a risk-free interest rate, expected option life, expected stock price volatility, and dividend yield of 2.49% , 6.5 years , 16.53% , and 0.00% respectively. During 2017 , options to purchase 10,556 shares of common stock at $17.30 per share were awarded and will expire no later than ten years following the grant date. The options granted vest over a five -year service period, with 20% of the awards vesting on each anniversary of the date of grant. The fair value of the options granted, as computed using the Black-Sholes option-pricing model, was determined to be $3.71 per option based upon the following underlying assumptions: a risk-free interest rate, expected option life, expected stock price volatility, and dividend yield of 1.98% , 6.5 years , 15.41% , and 0.00% , respectively. The risk-free interest rate was based on the U.S. Treasury yield at the option grant date for securities with a term matching the expected life of the options granted. The expected life was calculated using the "simplified" method provided for under Staff Accounting Bulletin No. 110. Expected volatility was calculated based upon the actual price history of the Company's common stock up until the date of the option grants. The dividend yield was not used in the calculation since no dividends were declared since the Company completed the full stock conversion. A summary of stock options at December 31, 2018 and 2017 was as follows: Year Ended Year Ended Stock Options: Shares Weighted- Average Exercise Price Shares Weighted- Average Exercise Price Outstanding at beginning of period 210,448 $ 13.27 472,973 $ 10.96 Granted 10,556 17.65 10,556 17.30 Exercised (10,511 ) 13.04 (273,081 ) 9.43 Forfeited (25,490 ) 13.04 — — Outstanding at end of period 185,003 13.56 210,448 13.27 Nonvested at end of period 116,072 13.73 167,271 13.32 Exercisable at end of period 68,931 13.25 43,177 13.05 Weighted-average fair value of awards granted $ 4.24 $ 3.71 The total amount of compensation cost remaining to be recognized relating to unvested option grants as of December 31, 2018 was $233,000 . The weighted-average period over which the expense is expected to be recognized is 2.5 years . At December 31, 2018 , the intrinsic value of options exercisable and all options outstanding was approximately $322,000 and $472,000 , respectively. The total amount of compensation cost remaining to be recognized relating to unvested option grants as of December 31, 2017 was $322,000 . The weighted-average period over which the expense is expected to be recognized is 3.5 years . At December 31, 2017 , the intrinsic value of options exercisable and all options outstanding was approximately $205,000 and $954,000 , respectively. The Company awarded 107,403 shares of restricted stock that vest over a five year period during the year ended December 31, 2016. The fair value of the restricted stock is equal to the fair value of the Company's common stock on the date of grant. For the year ended December 31, 2018 , there were 55,443 restricted shares that were unvested and outstanding with a fair value of $13.04 . The total amount of compensation cost to be recognized relating to non-vested restricted stock as of December 31, 2018 , was $586,000 . The weighted-average period over which the expense is expected to be recognized is 2.5 years . During the year ended December 31, 2018 and December 31, 2017 , stock-based compensation expense recorded in regard to the options and the restricted stock grants totaled $328,000 and $391,000 , respectively.

Commitments

Commitments	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments	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 and letters of credit. Such commitments involve, to varying degrees, elements of credit, and interest rate risk in excess of the amount recognized in the statements of financial condition. 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 and letters of credit is represented by the contractual amount of those instruments. The Bank uses the same credit policies in making commitments and conditional obligations as it does for on-balance-sheet instruments. At December 31, 2018 and 2017 , the following financial instruments were outstanding whose contract amounts represent credit risk: At At (In thousands) Commitments to grant loans $ 14,236 $ 25,176 Unfunded commitments under lines of credit 74,123 65,597 Standby letters of credit 159 359 $ 88,518 $ 91,132 At December 31, 2018 , commitments to grant loans included $281,000 one-to-four family mortgage loans, $4.8 million of construction loans, $6.9 million of commercial and multi-family estate loans and $2.2 million of commercial and industrial loans. Of the unfunded commitments under lines of credit at December 31, 2018 , $14.5 million was available under the Bank's home equity lending program, $414,000 was available under the overdraft protection lending program and $59.3 million was available under commercial lines of credit. At December 31, 2017 , commitments to grant loans included $95,000 of one-to-four family mortgage loans, $4.5 million of construction loans, $8.6 million of commercial and multi-family real estate loans and $12.0 million of commercial and industrial loans. Of the unfunded commitments under lines of credit at December 31, 2017 , $14.9 million was available under the Bank's home equity lending program, $428,000 was available under the overdraft protection lending program and $50.2 million was available under the commercial lines of credit. 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 creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Bank upon extension of credit, is based on management's credit evaluation. Collateral held varies but primarily includes residential and income-producing commercial real estate properties. Standby letters of credit are conditional commitments issued by the Bank to guarantee the performance of a customer to a third party. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending other loan commitments. The Bank requires collateral supporting these letters of credit when deemed necessary. Management believes that the proceeds obtained through a liquidation of such collateral would be sufficient to cover the maximum potential amount of future payments required under the corresponding guarantees. The fair values of these obligations were immaterial as of December 31, 2018 and 2017 .

Transactions with Officers and

Transactions with Officers and Directors	12 Months Ended
	Dec. 31, 2018
Related Party Transactions [Abstract]
Transactions with Officers and Directors	Transactions with Officers and Directors The Bank has had, and may be expected to have in the future, banking transactions in the ordinary course of business with its officers, directors, their immediate families, and affiliated companies (commonly referred to as related parties). These persons were indebted to the Bank for loans totaling $8.2 million and $7.9 million at December 31, 2018 and 2017 , respectively. During the year ended December 31, 2018 , $1.7 million of new loans and $1.4 million of repayments were made. During the year ended December 31, 2017 , the Bank had $4.2 million in loans related to a director that retired who no longer qualifies as related party. Total deposits from related parties at December 31, 2018 were $43.5 million .

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The Company uses fair value measurements to record fair value adjustments to certain assets and to determine fair value disclosures. FASB ASC Topic 820, Fair Market Value Disclosures ("ASC 820"), defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. A fair value measurement assumes that the transaction to sell the asset or transfer the liability occurs in the principal market for the asset or liability or, in the absence of a principal market, the most advantageous market for the asset or liability. The price in the principal (or most advantageous) market used to measure the fair value of the asset or liability shall not be adjusted for transaction costs. An orderly transaction is a transaction that assumes exposure to the market for a period prior to the measurement date to allow for marketing activities that are usual and customary for transactions involving such assets and liabilities; it is not a forced transaction. Market participants are buyers and sellers in the principal market that are (i) independent, (ii) knowledgeable, (iii) able to transact and (iv) willing to transact. ASC 820 requires the use of valuation techniques that are consistent with the market approach, the income approach and/or the cost approach. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets and liabilities. The income approach uses valuation techniques to convert future amounts, such as cash flows or earnings, to a single present amount on a discounted basis. The cost approach is based on the amount that currently would be required to replace the service capacity of an asset (replacement cost). Valuation techniques should be consistently applied. Inputs to valuation techniques refer to the assumptions that market participants would use in pricing the asset or liability. Inputs may be observable, meaning those that reflect the assumptions market participants would use in pricing the asset or liability developed based on market data obtained from independent sources, or unobservable, meaning those that reflect the reporting entity's own assumptions about the assumptions market participants would use in pricing the asset or liability developed based on the best information available in the circumstances. In that regard, ASC 820 establishes a fair value hierarchy for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. The fair value hierarchy is as follows: • Level 1 Inputs – Unadjusted quoted prices in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date. • Level 2 Inputs – Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These might include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (such as interest rates, volatilities, prepayment speeds, credit risks, etc.) or inputs that are derived principally from or corroborated by market data by correlation or other means. • Level 3 Inputs – Unobservable inputs for determining the fair values of assets or liabilities that reflect an entity's own assumptions about the assumptions that market participants would use in pricing the assets or liabilities. A description of the valuation methodologies used for instruments measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy, is set forth below. An asset's 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. In general, fair value is based upon quoted market prices, where available. If such quoted market prices are not available, fair value is based upon internally developed models that primarily use, as inputs, observable market-based parameters. Valuation adjustments may be made to ensure that financial instruments are recorded at fair value. These adjustments may include amounts to reflect counterparty credit quality, among other things, as well as unobservable parameters. Any such valuation adjustments are applied consistently over time. The Company's valuation methodologies may produce a fair value calculation that may not be indicative of net realizable value or reflective of future values. While management believes the Company's valuation methodologies are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date. Assets and Liabilities Measured at Fair Value on a Recurring Basis The Bank did not have any financial assets measured at fair value on a recurring basis as of December 31, 2018 and 2017 . Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis Certain financial and non-financial assets are measured at fair value on a non-recurring basis; that is, the instruments are not measured at fair value on an ongoing basis but are subject to fair value adjustments in certain circumstances (for example, when there is evidence of impairment). The following tables summarize those assets measured at fair value on a non-recurring basis as of December 31, 2018 and 2017 : December 31, 2018 Level 1 Inputs Level 2 Inputs Level 3 Inputs Total Fair Value Impaired loans $ — $ — $ 350 $ 350 December 31, 2017 Level 1 Inputs Level 2 Inputs Level 3 Inputs Total Fair Value Impaired loans $ — $ — $ 6 $ 6 For Level 3 input assets measured at fair value on non-recurring basis as of December 31, 2018 and 2017 , the significant unobservable inputs used in fair value measurements were as follows: December 31, 2018 Fair Value Estimate Valuation Techniques Unobservable Input Range (Weighted Average) (Dollars in thousands) Impaired loans $350 Appraisal of Appraisal 0% (0%) Liquidation 7.3% (7.3%) December 31, 2017 Fair Value Estimate Valuation Techniques Unobservable Input Range (Weighted Average) (Dollars in thousands) Impaired loans $6 Appraisal of Appraisal 475.6% (475.6%) Liquidation 0% (0%) An impaired loan is measured for impairment at the time the loan is identified as impaired. Loans are considered impaired when based on current information and events it is probable that payment of interest and principal will not be made in accordance with the contractual terms of the loan agreement. The Company's impaired loans are generally collateral dependent and, as such, are carried at the lower of cost or estimated fair value less estimated selling costs. Fair values are estimated through current appraisals and adjusted as necessary to reflect current market conditions and as such are classified as Level 3. Disclosure about Fair Value of Financial Instruments The fair value of a financial instrument is defined above. Significant estimates were used for the purposes of disclosing fair values. Estimated fair values have been determined using the best available data and estimation methodology suitable for each category of financial instruments. However, there are inherent weaknesses in any estimation technique. Therefore, for substantially all financial instruments, the fair value estimates herein are not necessarily indicative of the amounts the Company could have realized in a sale transaction on the dates indicated. The estimated fair value amounts have been measured as of their respective reporting dates, and have not been reevaluated or updated for purposes of these consolidated financial statements subsequent to those respective dates. As such, the estimated fair values of these financial instruments subsequent to the respective reporting dates may be different than the amounts reported. The following information should not be interpreted as an estimate of the fair value of the entire Company since a fair value calculation is only provided for a limited portion of the Company's assets and liabilities. 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 presents the carrying amount, fair value and placement in the fair value hierarchy as of December 31, 2018 and 2017 , of the Company's financial instruments which are carried on the consolidated statement of financial condition at cost and are not measured or recorded at fair value on a recurring basis. Carrying Amount Fair Value Level 1 Inputs Level 2 Inputs Level 3 Inputs As of December 31, 2018 (In thousands) Financial assets: Cash and due from banks $ 11,800 $ 11,800 $ 11,800 $ — $ — Securities held to maturity 39,476 38,569 — 38,569 — Loans receivable, net (1) 502,299 490,177 — — 490,177 Accrued interest receivable 1,615 1,615 — 111 1,504 Financial liabilities: Deposits 420,579 421,164 — 421,164 — Advances from Federal Home Loan Bank of New York 94,275 93,839 — 93,839 — Accrued interest payable 86 86 — 86 — As of December 31, 2017 Financial assets: Cash and due from banks $ 22,309 $ 22,309 $ 22,309 $ — $ — Securities held to maturity 38,482 38,255 — 38,255 — Loans receivable (1) 473,405 472,881 — — 472,881 Financial liabilities: Deposits 448,913 450,580 — 450,580 — Advances from Federal Home Loan Bank of New York 37,675 37,400 — 37,400 — (1) Includes impaired loans measured at fair value on a non-recurring basis as discussed above. Management used exit prices to estimate the fair values in the table above as of December 31, 2018. Methods and assumptions used to estimate fair values of financial assets and liabilities as of December 31, 2017 are as follows: Cash and Cash Equivalents For cash and cash equivalents, the carrying amount is a reasonable estimate of fair value. Securities Held to Maturity The fair value for securities held to maturity is based on quoted market prices, where available. If quoted market prices are not available, fair value is estimated using quoted market prices for similar securities. Loans Receivable The fair value of loans is based upon a multitude of sources, including assumed current market rates by category and the Bank's current offering rates. Both fixed and variable rate loan fair values are derived at using a discounted cash flow methodology. For variable rate loans, repricing terms, including next reprice date, reprice frequency and reprice rate are factored into the discounted cash flow formula. Deposits Fair values for demand deposits, savings accounts and club accounts are, by definition, equal to the amount payable on demand at the reporting date. Fair values of fixed-maturity certificates of deposit are estimated using a discounted cash flow calculation that applies interest rates currently being offered on similar instruments with similar maturities. Advances from Federal Home Loan Bank of New York Fair values of advances are estimated using discounted cash flow analyses, based on rates currently available to the Company for advances from the FHLB of New York with similar terms and remaining maturities. Off-Balance Sheet Financial Instruments Fair values of commitments to extend credit are estimated using the fees currently charged to enter into similar agreement, into account market interest rates, the remaining terms, and the present credit worthiness of the counterparties. As of December 31, 2018 and 2017 , the fair value of the commitments to extend credit was not considered to be material.

Parent Only Financial Statement

Parent Only Financial Statements	12 Months Ended
	Dec. 31, 2018
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Parent Only Financial Statements	Parent Only Financial Statements At At (In thousands) Assets Cash and due from banks $ 1,953 $ 11,639 Loan receivable 2,003 2,094 Investments in subsidiaries 61,741 58,843 Other assets 1,015 501 Total Assets $ 66,712 $ 73,077 Liabilities Other liabilities $ 66 $ 52 Total Liabilities 66 52 Stockholders' Equity Common stock 54 58 Paid-in capital 44,726 51,068 Retained earnings 23,498 23,641 Unallocated common stock held by ESOP (1,632 ) (1,742 ) Total Stockholders' Equity 66,646 73,025 Total Liabilities and Stockholders' Equity $ 66,712 $ 73,077 Condensed Statements of Comprehensive Income Years Ended December 31, 2018 2017 (In thousands) Dividends from Subsidiaries $ 2,452 $ — Equity in undistributed earnings of subsidiaries 2,569 2,846 Interest income 67 70 Non-interest expense (283 ) (257 ) Income Before Income Tax Benefit 4,805 2,659 Income tax benefit (30 ) (63 ) Net Income $ 4,835 $ 2,722 Comprehensive Income $ 4,835 $ 2,844 Condensed Statements of Cash Flows Years Ended December 31, 2018 2017 (In thousands) Cash Flows from Operating Activities Net income $ 4,835 $ 2,722 Adjustments to reconcile net income to net cash provided by (used in) operating activities: Equity in undistributed earnings of subsidiaries (2,569 ) (2,846 ) Net change in other assets and liabilities (172 ) 127 Net Cash Provided by (Used in) Operating Activities 2,094 3 Cash Flows from Investing Activities Repayment of ESOP loan receivable 91 88 Net Cash Provided by Investing Activities 91 88 Cash Flows from Financing Activities Repurchase of common stock (6,840 ) (108 ) Proceeds from exercise of stock options — 571 Cash dividends paid to stockholders (4,978 ) (2,451 ) Net exercise of options and repurchase of shares (53 ) (1,672 ) Net Cash Used in Financing Activities $ (11,871 ) $ (3,660 ) Net Decrease in Cash and Cash Equivalents (9,686 ) (3,569 ) Cash and Cash Equivalents - Beginning 11,639 15,208 Cash and Cash Equivalents - Ending $ 1,953 $ 11,639

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Basis of Consolidated Financial Statement Presentation	Basis of Consolidated Financial Statement Presentation The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries, the Bank and the Bank's wholly owned subsidiary, the Service Corp. All significant intercompany accounts and transactions have been eliminated in consolidation. The consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America ("GAAP"). In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the dates of the consolidated statements of financial condition and revenues and expenses for the periods then ended. Actual results could differ significantly from those estimates.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and cash equivalents include cash and amounts due from depository institutions and interest-bearing deposits with banks with original maturities of six months or less.
Securities	Securities Investments in debt securities that the Company has the positive intent and ability to hold to maturity are classified as held to maturity securities and reported at amortized cost. Debt securities that are bought and held principally for the purpose of being sold in the near term are classified as trading securities and reported at fair value, with unrealized holding gains and losses included in earnings. Debt securities not classified as trading securities or as held to maturity securities are classified as available for sale securities and reported at fair value, with unrealized holding gains or losses, net of applicable income taxes, reported in a separate component of stockholders' equity. The Company had no trading or available for sale securities as of December 31, 2018 and 2017 . Beginning in 2018, equity investments are measured at fair value with changes in fair value recognized in net income. The Company had no equity investments with changes in fair value recorded in net income at December 31, 2018 . Individual securities are considered impaired when their fair value is less than amortized cost. Management evaluates all securities with unrealized losses quarterly to determine if such impairments are "temporary" or "other-than-temporary" in accordance with applicable accounting guidance. Accordingly, the Company accounts for temporary impairments based upon a security's classification as trading, available for sale or held to maturity. Temporary impairments on available for sale securities are recognized, on a tax-effected basis, through other comprehensive income (loss) with offsetting entries adjusting the carrying value of the security and the balance of deferred taxes. Temporary impairments of held to maturity securities are not recognized in the consolidated financial statements; however, information concerning the amount and duration of impairments on held to maturity securities is disclosed in the notes to the consolidated financial statements. The carrying value of securities held in the trading portfolio is adjusted to fair value through earnings on a monthly basis. Other-than-temporary impairments on securities that the Company has decided to sell or will more likely than not be required to sell prior to the full recovery of their fair value to a level equal to or exceeding amortized cost are recognized in earnings. Otherwise, the other-than-temporary impairment is bifurcated into credit-related and noncredit-related components. The credit-related impairment generally represents the amount by which the present value of the cash flows expected to be collected on the debt security falls below its amortized cost. The noncredit-related component represents the remaining portion of the impairment not otherwise designated as credit-related. Credit-related other-than-temporary impairments are recognized in earnings while noncredit-related other-than-temporary impairments are recognized, net of deferred taxes, in other comprehensive income (loss). The Company reviews its investment portfolio on a quarterly basis for indications of impairment. This review includes analyzing the length of time and the extent to which the fair value of a security has been lower than the cost, and the financial condition and near-term prospects of the issuer, including any specific events which may influence the operations of the issuer. The Company also assesses its intent with regard to selling or holding each security as well as any conditions which may require the sale of security prior to the recovery of fair value to a level which equals or exceeds amortized cost. Discounts and premiums on securities are accreted/amortized to maturity by use of the level-yield method. Gain or loss on sales of securities is based on the specific identification method.
Concentration Risk	Concentration of Risk The Bank's lending activities are concentrated in loans secured by real estate located in the State of New Jersey.
Loans Receivable	Loans Receivable Loans are stated at their outstanding unpaid principal balances, net of an allowance for loan losses and any deferred fees or costs. Interest income is accrued on the unpaid principal balance. Loan origination fees, net of certain direct loan origination costs, are deferred and recognized as an adjustment of the yield (interest income) of the related loans. The Company is generally amortizing these amounts based on the effective interest method.
Allowance for Credit Losses	Allowance for Credit Losses The allowance for credit losses consists of the allowance for loan losses and the reserve for unfunded lending commitments. The allowance for loan losses represents management's estimate of probable incurred losses in the loan portfolio as of the statement of financial condition date and is recorded as a reduction to loans. The reserve for unfunded lending commitments represents management's estimate of probable incurred losses in its unfunded loan commitments and is recorded in other liabilities, when required, on the consolidated statement of financial condition. The allowance for credit losses is increased by the provision for loan losses, and decreased by charge-offs, net of recoveries. All, or part, of the principal balance of loans receivable that are deemed uncollectible are charged against the allowance for loan losses when management determines that the repayment of that amount is highly unlikely. Any subsequent recoveries are credited to the allowance for loan losses. Non-residential consumer loans are generally charged off no later than 120 days past due on a contractual basis, earlier in the event of bankruptcy, or if there is an amount deemed uncollectible. The allowance for loan losses is maintained at a level considered adequate to provide for losses that can be reasonably anticipated. Management performs a quarterly evaluation of the adequacy of the allowance. The allowance is based on the Company's three year loan loss experience, known and probable incurred losses in the portfolio, adverse situations that may affect the borrower's ability to repay, the estimated value of any underlying collateral, the composition of the loan portfolio, current economic conditions and other relevant factors. This evaluation is inherently subjective as it requires material estimates that may be susceptible to significant revision as more information becomes available. For additional detail regarding the allowance for loan losses, see Note 4 to the Consolidated Financial Statements.
Other Real Estate Owned	Other Real Estate Owned ("OREO") Other real estate owned represents real estate acquired through formal foreclosure or by taking possession of the real estate and is initially recorded at the lower of cost or fair value, less estimated selling costs establishing a new cost basis. Write-downs required at the time of acquisition are charged to the allowance for loan losses. Thereafter, the Company maintains an allowance for decreases in the property's estimated fair value, through charges to earnings. Such charges are included in other non-interest expense along with any additional property maintenance. There was no OREO at December 31, 2018 and 2017 . We may obtain physical possession of residential and commercial real estate collateralizing consumer and commercial mortgage loans via foreclosure or in-substance repossession. As of December 31, 2018 , we had consumer loans with a carrying value of $708,000 collateralized by residential real estate property for which formal foreclosure proceedings were in process.
Premises and Equipment	Premises and Equipment Premises and equipment are comprised of land, at cost, and buildings, building improvements, furnishings and equipment and leasehold improvements, at cost, less accumulated depreciation and amortization. Depreciation and amortization charges are computed on the straight-line method over the following estimated useful lives: Years Building and improvements 5 - 50 Furnishings and equipment 3 – 7 Leasehold improvements Shorter of useful life Significant renewals and betterments are capitalized to the premises and equipment account. Maintenance and repairs are charged to operations in the year incurred. Rental income is netted against occupancy costs in the consolidated statements of income.
Federal Home Loan Bank Stock	Federal Home Loan Bank Stock Federal law requires a member institution of the Federal Home Loan Bank ("FHLB") system to hold restricted stock of its district's FHLB according to a predetermined formula based on advances available and outstanding. The restricted stock is carried at cost. Management's determination of whether these shares are impaired is based on an 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. Management believes no impairment charge was necessary related to the FHLB restricted stock during the years ended December 31, 2018 and 2017 .
Bank Owned Life Insurance	Bank Owned Life Insurance Bank owned life insurance is carried at net cash surrender value. The change in the net cash surrender value is recorded as a component of non-interest income.
Defined Benefit Plans	Defined Benefit Plans In accordance with applicable guidance prescribed in Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) 715, "Compensation – Retirement Benefits", the Company recognizes the over-funded or under-funded status of a defined benefit postretirement plan as an asset or liability in the consolidated statement of financial condition, with changes in the funded status recorded through other comprehensive income (loss) in the year in which those changes occur. The funded status of the plan is calculated using actuarial concepts which involve making assumptions regarding discount rate, mortality, expected rate of compensation increases and others.
Stock-based Compensation Plans	Stock-based Compensation Plans In accordance with FASB ASC 718, "Compensation – Stock Compensation", the Company recognizes compensation expense for the total of the fair value of all share-based compensation awards granted over the requisite service periods. In addition, ASC 718 requires that cash flow activity be reported on a financing rather than an operating cash flow basis for the benefits, if any, of realized tax deductions in excess of previously recognized tax benefits on compensation expense.
Advertising	Advertising The Company expenses advertising and marketing costs as incurred.
Income Tax Expense	Income Tax Expense The Company and its subsidiaries file a consolidated federal income tax return. Federal income taxes are allocated based on the contribution of their respective income or loss to the consolidated income tax return. Separate state income tax returns are filed. Federal and state income taxes have been provided for these consolidated financial statements on the basis of reported income. The amounts reflected on the income tax returns differ from these provisions due principally to temporary differences in the reporting of certain items of income and expense for financial reporting and income tax reporting purposes. Deferred income taxes are recorded to recognize such temporary differences. The Company follows the provisions of FASB ASC 740, "Income Taxes", formerly FASB Interpretation No. 48, "Accounting for Uncertainty in Income Taxes ("FIN48"). ASC 740 prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return, and also provides guidance on derecognizing, classification, interest and penalties, accounting in interim periods, disclosure and transition. As a result of the Company's evaluation under ASC 740, no significant income tax uncertainties have been identified. Therefore, the Company recognized no adjustment for unrecognized income tax benefits for the years ended December 31, 2018 and 2017 . The Company's policy is to recognize interest and penalties on unrecognized tax benefits in income tax expense in the consolidated statement of income. The Company did not recognize any interest and penalties for the years ended December 31, 2018 and 2017 . The tax years subject to examination by the taxing authorities are the years ended December 31, 2018 , 2017 , 2016 and 201
Off-Balance Sheet Credit-Related Financial Instruments	Off-Balance Sheet Credit-Related Financial Instruments In the ordinary course of business, the Company enters into commitments to extend credit, including commitments under lines of credit. Such financial instruments are recorded when they are funded.
Earnings Per Share	Earnings per Share Basic earnings per share is computed by dividing net income by the weighted average number of common shares outstanding, exclusive of the Employee Stock Ownership Plan ("ESOP") shares not yet committed to be released. Diluted earnings per share is calculated by adjusting the weighted average number of shares of common stock outstanding to include the effect of contracts or securities exercisable (such as stock options) or which could be converted into common stock, if dilutive, using the treasury stock method.
Other Comprehensive Income	Other Comprehensive Income Other comprehensive income includes benefit plan's amounts recognized under ASC 715, "Compensation-Retirement Benefits". This item of other comprehensive income reflects, net of tax, prior service costs and unrealized net losses that had not been recognized in the consolidated financial statements prior to the implementation of ASC 715 along with actuarial losses arising during the current period.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In May 2014, the FASB issued Accounting Standards Update (ASU) No. 2014-9, "Revenue from Contracts with Customers (ASU 2014-9)", which supersedes nearly all existing revenue recognition guidance under GAAP. The core principle of ASU 2014-9 is to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration to which an entity expects to be entitled for those goods or services. ASU 2014-9 defines a five-step process to achieve this core principle and, in doing so, more judgment and estimates may be required within the revenue recognition process than are required under existing GAAP. The FASB also subsequently issued ASUs Nos. 2016-8, 2016-10, 2016-12, 2016-20 and 2017-5 to augment, amend and clarify the original pronouncement. The Company evaluated all of its revenue streams and determined that the majority of its revenue is derived from financial instruments that are scoped out. In addition, non-interest revenue streams were evaluated, including deposit and service charges and interchange fees. The Company adopted ASU 2014-9 on January 1, 2018 and it did not materially change the timing of recognition of our current revenue sources. Accordingly, no cumulative effect adjustment was recorded under the modified retrospective transition method. In January 2016, the FASB issued ASU No. 2016-1, "Financial Instruments - Overall." The guidance in this ASU among other things, (1) requires equity investments with certain exceptions, to be measured at fair value with changes in fair value recognized in net income, (2) simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment, (3) eliminates the requirement for public businesses entities to disclose the methods and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet, (4) requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes, (5) requires an entity to present separately in other comprehensive income the portion of the change in fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments, (6) requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or the accompanying notes to the financial statements and (7) clarifies that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale securities. The guidance in this ASU is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The adoption of this guidance effective January 1, 2018, did not have a material impact on our consolidated financial statements, but did change the disclosure requirements in Note 15 - Fair Value Measurements. In February 2016, the FASB issued ASU No. 2016-2, "Leases" (Topic 842). This ASU revises the accounting related to lessee accounting. Under the new guidance, lessees will be required to recognize a right-of-use asset and a lease liability for all leases. The new lease guidance also simplified the accounting for sale and leaseback transactions primarily due to the recognition of lease assets and lease liabilities. ASU 2016-2 is effective for the first interim period within annual periods beginning after December 15, 2018, with early adoption permitted. The standard is required to be adopted using the modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The adoption of ASC 842 will result in the recognition of a right-of-use (ROU) asset of $1.3 million and a lease liability of $1.3 million on our Consolidated Statements of Financial Condition. We will provide additional detail to our leases disclosures on a prospective basis, beginning in the first quarter of 2019. In June 2016, the FASB issued ASU No. 2016-13, "Measurement of Credit Losses on Financial Instruments." This ASU requires credit losses on most financial assets measured at amortized cost and certain other instruments to be measured using an expected credit loss model. Under this model, entities will estimate credit losses over the entire contractual term of the instrument. The standard is effective for public companies in annual and interim periods in fiscal years beginning after December 15, 2019. Early adoption is permitted, including adoption in the interim or annual period provided that the entire standard is adopted. We are currently evaluating the impact of ASU 2016-13 on our consolidated financial statements. We have taken steps to begin preparations for implementation, such as evaluating changes to our current loss recognition model and evaluating the potential use of outside professionals for an updated model.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Schedule of Estimate Useful Lives	Depreciation and amortization charges are computed on the straight-line method over the following estimated useful lives: Years Building and improvements 5 - 50 Furnishings and equipment 3 – 7 Leasehold improvements Shorter of useful life
Schedule of Earnings Per Share, Basic and Diluted	The following table shows the computation of basic and diluted earnings per share: Year Ended December 31, (In Thousands, Except Per Share Data) 2018 2017 Numerator: Net income $ 4,835 $ 2,722 Denominator: Weighted average common shares 5,351 5,550 Dilutive potential common shares 49 95 Weighted average fully diluted shares 5,400 5,645 Earnings per share: Basic $ 0.90 $ 0.49 Dilutive $ 0.90 $ 0.48 Outstanding common stock equivalents having no dilutive effect — —

Securities Held to Maturity (Ta

Securities Held to Maturity (Tables)	12 Months Ended
	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Unrealized Gain (Loss) on Investments	The amortized cost of securities held to maturity and their fair values are summarized as follows: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (In thousands) December 31, 2018: U.S. Government agencies $ 8,000 $ 11 $ 18 $ 7,993 Mortgage-backed securities 23,936 142 299 23,779 Corporate bonds 6,500 — 736 5,764 State and political subdivisions 1,040 — 7 1,033 $ 39,476 $ 153 $ 1,060 $ 38,569 December 31, 2017: U.S. Government agencies $ 5,500 $ — $ 42 $ 5,458 Mortgage-backed securities 23,839 263 207 23,895 Corporate bonds 7,012 6 243 6,775 State and political subdivisions 1,196 1 5 1,192 Certificates of deposits 935 1 1 935 $ 38,482 $ 271 $ 498 $ 38,255
Investments Classified by Contractual Maturity Date	Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. (In thousands) Amortized Cost Fair Value U.S. Government agencies: Due within one year $ 2,000 $ 1,982 Due after one year through five years — — Due after five through ten years 3,000 3,002 Due thereafter 3,000 3,009 8,000 7,993 Mortgage-backed securities Due within one year 898 891 Due after one year through five years 15,563 15,539 Due after five through ten years 3,241 3,150 Due thereafter 4,234 4,199 23,936 23,779 Corporate Bonds Due within one year — — Due after one year through five years 1,500 1,487 Due after five years through ten years 1,000 910 Due thereafter 4,000 3,367 6,500 5,764 State and political subdivisions Due within one year 161 160 Due after one year through five years 697 692 Due after five years through ten years 182 181 1,040 1,033 $ 39,476 $ 38,569
Schedule of Unrealized Loss on Investments	The following table provides the gross unrealized losses and fair value of securities in an unrealized loss position, by the length of time that such securities have been in a continuous unrealized loss position: Less than 12 Months More than 12 Months Total Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses (In thousands) December 31, 2018: U.S. Government agencies $ — $ — $ 1,982 $ 18 $ 1,982 $ 18 Mortgage-backed securities 8 1 15,205 298 15,213 299 Corporate bonds 1,487 13 4,277 723 5,764 736 State and political subdivisions 180 1 853 6 1,033 7 $ 1,675 $ 15 $ 22,317 $ 1,045 $ 23,992 $ 1,060 December 31, 2017: U.S. Government agencies $ 1,000 $ 1 $ 4,458 $ 41 $ 5,458 $ 42 Mortgage-backed securities 7,796 88 5,558 119 13,354 207 Corporate bonds — — 4,756 243 4,756 243 State and political subdivisions 655 5 — — 655 5 Certificates of deposits 245 1 — — 245 1 $ 9,696 $ 95 $ 14,772 $ 403 $ 24,468 $ 498

Loans Receivable and Allowanc_2

Loans Receivable and Allowance for Loan Losses (Tables)	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Schedule of Accounts, Notes, Loans and Financing Receivable	The composition of total loans receivable at December 31, 2018 and 2017 was as follows: At At (In thousands) Residential mortgage: One-to-four family $ 143,391 $ 157,876 Home equity 24,365 26,803 167,756 184,679 Commercial and multi-family real estate 212,606 196,681 Construction 29,628 43,718 Commercial and industrial 108,602 73,465 350,836 313,864 Consumer: 540 618 Total loans receivable 519,132 499,161 Less: Loans in process 10,677 19,868 Deferred loan fees 501 474 Allowance for loan losses 5,655 5,414 Total adjustments 16,833 25,756 Loans receivable, net $ 502,299 $ 473,405
Allowance for Credit Losses on Financing Receivables	The following tables provide an analysis of the allowance for loan losses and the loan receivable balances, by the portfolio segment segregated into the amount required for loans individually evaluated for impairment and the amount required for loans collectively evaluated for impairment as of December 31, 2018 and 2017 : Year Ended December 31, 2018 (in thousands) Residential Mortgage Commercial and Multi-Family Real Estate Construction Commercial and Industrial Consumer Unallocated Total Allowance for loan losses: Balance, beginning $ 1,852 $ 2,267 $ 302 $ 710 $ 5 $ 278 $ 5,414 Provisions 255 (80 ) (80 ) 418 5 (278 ) 240 Loans charged-off — — — — (8 ) — (8 ) Recoveries 8 — — — 1 — 9 Balance, ending $ 2,115 $ 2,187 $ 222 $ 1,128 $ 3 $ — $ 5,655 Period-end allowance allocated to: Loans individually evaluated for impairment $ 326 $ 69 $ — $ 20 $ — $ — $ 415 Loans collectively evaluated for impairment 1,789 2,118 222 1,108 3 — $ 5,240 Ending balance $ 2,115 $ 2,187 $ 222 $ 1,128 $ 3 $ — $ 5,655 Period-end loan balances evaluated for: Loans individually evaluated for impairment $ 11,960 $ 2,411 $ — $ 243 $ — $ — $ 14,614 Loans collectively evaluated for impairment 155,746 209,879 18,905 108,270 540 — 493,340 Ending balance $ 167,706 $ 212,290 $ 18,905 $ 108,513 $ 540 $ — $ 507,954 Year Ended December 31, 2017 (in thousands) Residential Mortgage Commercial and Multi-Family Real Estate Construction Commercial and Industrial Consumer Unallocated Total Allowance for loan losses: Balance, beginning $ 1,808 $ 1,441 $ 248 $ 882 $ 6 $ 91 $ 4,476 Provisions 215 869 54 (143 ) 3 187 $ 1,185 Loans charged-off (178 ) (43 ) — (30 ) (4 ) — $ (255 ) Recoveries 7 — — 1 — — $ 8 Balance, ending $ 1,852 $ 2,267 $ 302 $ 710 $ 5 $ 278 $ 5,414 Period-end allowance allocated to: Loans individually evaluated for impairment $ — $ — $ — $ 27 $ 1 $ — $ 28 Loans collectively evaluated for impairment 1,852 2,267 302 683 4 278 5,386 Ending balance $ 1,852 $ 2,267 $ 302 $ 710 $ 5 $ 278 $ 5,414 Period-end loan balances evaluated for: Loans individually evaluated for impairment $ 12,609 $ 2,057 $ — $ 205 $ 1 $ — $ 14,872 Loans collectively evaluated for impairment 171,988 194,373 23,803 73,167 616 — 463,947 Ending balance $ 184,597 $ 196,430 $ 23,803 $ 73,372 $ 617 $ — $ 478,819
Past Due Financing Receivables	As of December 31, 2017 30-59 Days Past Due and Still Accruing 60-89 Days Past Due and Still Accruing Greater than 90 Days and Still Accruing Total Past Due and Still Accruing Accruing Current Balances Nonaccrual Loans(1) Total Loans Receivables (In thousands) Residential Mortgage One-to-four family $ 1,221 $ 700 $ — $ 1,921 $ 152,425 $ 3,446 $ 157,792 Home equity 605 16 157 $ 778 25,912 115 26,805 Commercial and multi-family real estate — — — $ — 196,115 315 196,430 Construction — — — $ — 23,803 — 23,803 Commercial and industrial 68 — — $ 68 73,205 99 73,372 Consumer — 5 1 $ 6 611 — 617 Total $ 1,894 $ 721 $ 158 $ 2,773 $ 472,071 $ 3,975 $ 478,819 (1) Nonaccrual loans at December 31, 2017 , included $1.7 million that were 90 days or more delinquent, $341,000 that were 60-89 days delinquent, $631,000 that were 30-59 days delinquent, and $1.3 million that were current or less than 30 days delinquent. The following table represents the classes of the loans receivable portfolio summarized by aging categories of performing loans and nonaccrual loans as of December 31, 2018 and 2017 : As of December 31, 2018 30-59 Days Past Due and Still Accruing 60-89 Days Past Due and Still Accruing Greater than 90 Days and Still Accruing Total Past Due and Still Accruing Accruing Current Balances Nonaccrual Loans (1) Total Loans Receivables (In thousands) Residential Mortgage One-to-four family $ 1,328 $ 365 $ 2 $ 1,695 $ 139,371 $ 2,276 $ 143,342 Home equity 1,602 75 — 1,677 22,079 608 24,364 Commercial and multi-family real estate — — — — 211,258 1,032 212,290 Construction — — — — 18,905 — 18,905 Commercial and industrial — — — — 108,298 215 108,513 Consumer 1 — — 1 539 — 540 Total $ 2,931 $ 440 $ 2 $ 3,373 $ 500,450 $ 4,131 $ 507,954 (1) Nonaccrual loans at December 31, 2018 , included $2.2 million that were 90 days or more delinquent, $123,000 that were 60-89 days delinquent, $556,000 that were 30-59 days delinquent, and $1.2 million that were current or less than 30 days delinquent.
Impaired Financing Receivables	The following tables provide an analysis of the impaired loans at December 31, 2018 and 2017 and the average balances of such loans for the years then ended: 2018 Recorded Investment Loans with No Related Reserve Loans with Related Reserve Related Reserve Contractual Principal Balance Average Loan Balances Residential mortgage One-to-four family $ 10,224 $ 1,956 $ 8,268 $ 298 $ 10,907 $ 10,392 Home equity 1,736 609 1,127 28 1,827 1,484 Commercial and multi-family real estate 2,411 1,405 1,006 69 3,067 2,059 Construction — — — — — — Commercial and industrial 243 223 20 20 262 149 Consumer — — — — — 1 Total $ 14,614 $ 4,193 $ 10,421 $ 415 $ 16,063 $ 14,085 2017 Recorded Investment Loans with No Related Reserve Loans with Related Reserve Related Reserve Contractual Principal Balance Average Loan Balances Residential mortgage One-to-four family $ 11,181 $ 11,181 $ — $ — $ 11,729 $ 12,256 Home equity 1,428 1,428 — — 1,522 1,335 Commercial and multi-family real estate 2,057 2,057 — — 2,680 1,787 Construction — — — — — — Commercial and industrial 205 173 32 27 242 296 Consumer 1 — 1 1 1 1 Total $ 14,872 $ 14,839 $ 33 $ 28 $ 16,174 $ 15,675
Financing Receivable Credit Quality Indicators	The following table presents the classes of the loans receivable portfolio summarized by the aggregate "Pass" and the criticized categories of "Special Mention", "Substandard", "Doubtful" and "Loss" within the internal risk rating system as of December 31, 2018 and 2017 : As of December 31, 2018 Pass Special Mention Substandard Doubtful Loss Total (In thousands) Commercial and multi-family real estate $ 209,206 $ 1,367 $ 1,717 $ — $ — $ 212,290 Construction 18,905 — — — — 18,905 Commercial and industrial 108,025 69 419 — — 108,513 Total $ 336,136 $ 1,367 $ 1,717 $ — $ — $ 339,708 As of December 31, 2017 Pass Special Mention Substandard Doubtful Loss Total (In thousands) Commercial and multi-family real estate $ 193,982 $ 1,415 $ 1,033 $ — $ — $ 196,430 Construction 23,803 — — — — 23,803 Commercial and industrial 72,962 182 228 — — 73,372 Total $ 290,747 $ 1,415 $ 1,033 $ — $ — $ 293,605
Schedule of Financing Receivables Performance Status	Loans greater than 90 days past due are generally considered nonperforming and placed on nonaccrual status. Residential mortgage Consumer Total Residential and Consumer As of December 31, 2018 2017 2018 2017 2018 2017 (In thousands) Nonperforming $ 2,884 $ 3,718 $ — $ 1 $ 2,884 $ 3,719 Performing 164,822 180,879 540 616 $ 165,362 $ 181,495 Total $ 167,706 $ 184,597 $ 540 $ 617 $ 168,246 $ 185,214
Troubled Debt Restructurings on Financing Receivables	The following tables summarize by class loans modified into TDRs during the year ended December 31, 2018 and 2017 : Year Ended Number of Contracts Pre-Modification Outstanding Recorded Investments Post-Modification Outstanding Recorded Investments (Dollars in thousands) Residential Mortgage One-to-four family — $ — $ — Home equity — — — Commercial and multi-family real estate 1 374 392 Commercial — — — Total 1 $ 374 $ 392 Year Ended Number of Contracts Pre-Modification Outstanding Recorded Investments Post-Modification Outstanding Recorded Investments (Dollars in thousands) Residential Mortgage One-to-four family 4 $ 1,019 $ 1,283 Home equity 2 99 — Commercial and multi-family real estate 1 419 661 Commercial 6 315 32 Total 13 $ 1,852 $ 1,976

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Schedule of Premise and Equipment	The components of premises and equipment at December 31, 2018 and 2017 were as follows: At At (In thousands) Land $ 1,937 $ 1,937 Buildings and improvements 8,555 8,555 Leasehold improvements 1,430 1,430 Furnishings and equipment 3,070 2,988 Assets being developed for future use — 27 14,992 14,937 Accumulated depreciation and amortization (6,812 ) (6,239 ) $ 8,180 $ 8,698

Accrued Interest Receivable (Ta

Accrued Interest Receivable (Tables)	12 Months Ended
	Dec. 31, 2018
Interest Receivable and Other Assets [Abstract]
Schedule of Interest Receivable	The components of interest receivable at December 31, 2018 and 2017 were as follows: At At (In thousands) Loans $ 1,504 $ 1,480 Securities held to maturity 111 127 $ 1,615 $ 1,607

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2018
Deposits [Abstract]
Schedule of Deposit Liabilities	Deposits at December 31, 2018 and 2017 consisted of the following classifications: At At Amount Average Rate Amount Average Rate (Dollars in thousands) Non-interest bearing demand $ 46,690 — % $ 36,919 — % Interest demand 134,123 1.01 155,199 0.71 Savings 102,740 0.63 105,106 0.33 Money market demand 16,171 0.78 27,350 0.59 Certificates of deposit 120,855 1.77 124,339 1.52 $ 420,579 1.01 % $ 448,913 0.78 %
Certificates of Deposit by Maturity	A summary of certificates of deposit by maturity at December 31, 2018 and 2017 is as follows: At At (Dollars in thousands) Within one year $ 39,790 $ 41,198 One to two years 34,407 23,396 Two to three years 31,947 18,676 Three to four years 10,552 27,266 Four to five years 2,949 12,302 Thereafter 1,210 1,501 $ 120,855 $ 124,339
Interest Expense by Deposit Type	A summary of interest expense on deposits for the years ended December 31, 2018 and 2017 is as follows: Year Ended December 31, 2018 2017 (Dollars in thousands) Interest demand and money market demand $ 1,257 $ 526 Savings and club 548 277 Certificates of deposit 2,029 1,647 $ 3,834 $ 2,450

Borrowings (Tables)

Borrowings (Tables)	12 Months Ended
	Dec. 31, 2018
Brokers and Dealers [Abstract]
Schedule of Federal Home Loan Bank Advances	Term advances due to the FHLB of NY at December 31, 2018 and 2017 consisted of the following: Fixed Interest At December 31, Maturity Rate 2018 2017 (Dollars in thousands) March 5, 2018 3.46 % $ — $ 10,000 July 6, 2020 1.79 2,675 2,675 September 8, 2020 1.75 5,000 5,000 November 23, 2020 2.27 10,000 10,000 September 8, 2021 1.89 5,000 5,000 September 8, 2022 2.01 5,000 5,000 $ 27,675 $ 37,675

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2018
Stockholders' Equity Note [Abstract]
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations	The following table presents a reconciliation of GAAP capital and regulatory capital and information as to the Bank's capital levels at the dates presented: Actual For capital adequacy purposes (1) To be well capitalized under prompt corrective action provisions Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) December 31, 2018: Tier 1 leverage capital ratio Millington Bank $ 61,740 10.71 % $ 23,052 ≥4.00 $ 28,816 ≥5.00 MSB Financial Corp. 66,646 11.56 N/A N/A N/A N/A Common equity tier 1 capital ratio Millington Bank 61,740 11.90 23,351 ≥4.50 33,729 ≥6.50 MSB Financial Corp. 66,646 12.84 N/A N/A N/A N/A Tier 1 capital ratio Millington Bank 61,740 11.90 31,134 ≥6.00 41,512 ≥8.00 MSB Financial Corp. 66,646 12.84 N/A N/A N/A N/A Total capital ratio Millington Bank 67,467 13.00 41,512 ≥8.00 51,891 ≥10.00 MSB Financial Corp. 72,373 13.95 N/A N/A N/A N/A (1) Amounts and ratios do not include the capital conservation buffer. Actual For capital adequacy purposes (1) To be well capitalized under prompt corrective action provisions Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) December 31, 2017: Tier 1 leverage capital ratio Millington Bank $ 58,843 10.72 % $ 21,951 ≥4.00 $ 27,439 ≥5.00 MSB Financial Corp. 73,025 13.31 21,952 ≥4.00 N/A N/A Common equity tier 1 capital ratio Millington Bank 58,843 11.98 22,098 ≥4.50 31,919 ≥6.50 MSB Financial Corp. 73,025 14.87 22,098 ≥4.50 N/A N/A Tier 1 capital ratio Millington Bank 58,843 11.98 29,463 ≥6.00 39,285 ≥8.00 MSB Financial Corp. 73,025 14.87 29,463 ≥6.00 N/A N/A Total capital ratio Millington Bank 64,304 13.10 39,285 ≥8.00 49,106 ≥10.00 MSB Financial Corp. 78,486 15.98 39,285 ≥8.00 N/A N/A (1) Amounts and ratios do not include the capital conservation buffer.

Lease Commitments and Total R_2

Lease Commitments and Total Rental Expense (Tables)	12 Months Ended
	Dec. 31, 2018
Leases [Abstract]
Schedule of Future Minimum Rental Payments for Operating Leases	Future minimum lease payments by year and in the aggregate, under non-cancellable operating leases with initial or remaining terms of one year or more, consisted of the following at December 31, 2018 : (in thousands) At Within one year $ 358 One to two years 332 Two to three years 289 Three to four years 198 Four to five years 203 1,380 Thereafter 154 $ 1,534

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit)	The total tax expense consisted of the following for the years ended December 31, 2018 and 2017 : Year Ended December 31, 2018 2017 (In thousands) Current income tax expense: Federal $ 1,000 $ 957 State 518 298 1,518 1,255 Deferred income tax expense (benefit): Federal 180 550 State 113 (37 ) 293 513 $ 1,811 $ 1,768
Schedule of Effective Income Tax Rate Reconciliation	A reconciliation of the statutory federal income tax at a rate of 21% and 34% , respectively, to the income tax expense included in the statements of income for the year ended December 31, 2018 and 2017 is as follows: Year ended December 31, 2018 2017 Amount % of Pretax Income Amount % of Pretax Income Federal income tax at statutory rate $ 1,396 21.0 % $ 1,526 34.0 % State tax, net of federal benefit 498 7.5 172 3.8 Bank Owned Life Insurance (81 ) (1.2 ) (140 ) (3.1 ) ESOP and stock-based compensation (11 ) (0.2 ) (486 ) (10.8 ) Impact of rate change on net deferred tax assets — — 678 15.1 Other 9 0.2 18 0.4 $ 1,811 27.3 % $ 1,768 39.4 %
Schedule of Deferred Tax Assets and Liabilities	The components of the net deferred tax asset at December 31, 2018 and 2017 were as follows: At December 31, At December 31, 2018 2017 (In thousands) Deferred tax assets: Allowances for losses on loans and commitments $ 1,610 $ 1,535 Uncollected interest 48 9 Benefit plans 127 533 Restricted stock award 38 36 Deferred Rent 16 — Accrued compensation 131 — Other 55 — 2,025 2,113 Deferred tax liabilities Depreciation (427 ) (423 ) Deferred loan costs (125 ) — Other (76 ) — (628 ) (423 ) Net deferred tax asset included in other assets $ 1,397 $ 1,690

Benefit Plans (Tables)

Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2018
Defined Benefit Plan [Abstract]
Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity	The following table sets forth the accumulated benefit obligation, the changes in the plan's projected benefit obligation and the plan's funded status as of and for each period presented. For the years ended December 31, 2018 2017 (Dollars in thousands) Accumulated benefit obligation – ending $ — $ 1,402 Projected benefit obligation – beginning $ 1,402 $ 1,466 Service cost — — Interest cost — 20 Actuarial (gain) loss — — Benefit payments (1,402 ) (84 ) Curtailment — — Projected benefit obligation – ending $ — $ 1,402 Plan assets at fair value – beginning $ — $ — Employer contribution — 84 Benefit payments — (84 ) Plan assets at fair value – ending $ — $ — Funded status at end of year (included in other liabilities) $ — $ 1,402 Assumptions: Discount rate N/A 1.41 % Rate of compensation increase N/A N/A
Schedule of Net Benefit Costs	Net periodic pension cost included the following: Years Ended December 31, 2018 2017 (Dollars in thousands) Service cost $ — $ — Interest cost — 20 Amortization of unrecognized loss — — Amortization of unrecognized past service liability — 202 Curtailment credit — — Net periodic pension cost $ — $ 222 Assumptions: Discount rate N/A 4.50% / 3.50% / 1.12% Rate of compensation N/A 3.00% / N/A
Employee Stock Ownership Plan (ESOP) Disclosures	ESOP shares at December 31, 2018 and 2017 are summarized as follows: At At Allocated shares 190,882 179,956 Shares earned and committed to be released 10,926 10,926 Allocated and earned 201,808 190,882 Total ESOP shares 381,272 381,272 Fair value of unallocated shares $ 3,203,432 $ 3,388,942
Share-based Compensation, Stock Options, Activity	A summary of stock options at December 31, 2018 and 2017 was as follows: Year Ended Year Ended Stock Options: Shares Weighted- Average Exercise Price Shares Weighted- Average Exercise Price Outstanding at beginning of period 210,448 $ 13.27 472,973 $ 10.96 Granted 10,556 17.65 10,556 17.30 Exercised (10,511 ) 13.04 (273,081 ) 9.43 Forfeited (25,490 ) 13.04 — — Outstanding at end of period 185,003 13.56 210,448 13.27 Nonvested at end of period 116,072 13.73 167,271 13.32 Exercisable at end of period 68,931 13.25 43,177 13.05 Weighted-average fair value of awards granted $ 4.24 $ 3.71

Commitments (Tables)

Commitments (Tables)	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Schedule of Financial Instruments Whose Contract Amounts Represent Credit Risk	At December 31, 2018 and 2017 , the following financial instruments were outstanding whose contract amounts represent credit risk: At At (In thousands) Commitments to grant loans $ 14,236 $ 25,176 Unfunded commitments under lines of credit 74,123 65,597 Standby letters of credit 159 359 $ 88,518 $ 91,132

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements, Nonrecurring	The following tables summarize those assets measured at fair value on a non-recurring basis as of December 31, 2018 and 2017 : December 31, 2018 Level 1 Inputs Level 2 Inputs Level 3 Inputs Total Fair Value Impaired loans $ — $ — $ 350 $ 350 December 31, 2017 Level 1 Inputs Level 2 Inputs Level 3 Inputs Total Fair Value Impaired loans $ — $ — $ 6 $ 6
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques	For Level 3 input assets measured at fair value on non-recurring basis as of December 31, 2018 and 2017 , the significant unobservable inputs used in fair value measurements were as follows: December 31, 2018 Fair Value Estimate Valuation Techniques Unobservable Input Range (Weighted Average) (Dollars in thousands) Impaired loans $350 Appraisal of Appraisal 0% (0%) Liquidation 7.3% (7.3%) December 31, 2017 Fair Value Estimate Valuation Techniques Unobservable Input Range (Weighted Average) (Dollars in thousands) Impaired loans $6 Appraisal of Appraisal 475.6% (475.6%) Liquidation 0% (0%)
Fair Value, by Balance Sheet Grouping	Carrying Amount Fair Value Level 1 Inputs Level 2 Inputs Level 3 Inputs As of December 31, 2018 (In thousands) Financial assets: Cash and due from banks $ 11,800 $ 11,800 $ 11,800 $ — $ — Securities held to maturity 39,476 38,569 — 38,569 — Loans receivable, net (1) 502,299 490,177 — — 490,177 Accrued interest receivable 1,615 1,615 — 111 1,504 Financial liabilities: Deposits 420,579 421,164 — 421,164 — Advances from Federal Home Loan Bank of New York 94,275 93,839 — 93,839 — Accrued interest payable 86 86 — 86 — As of December 31, 2017 Financial assets: Cash and due from banks $ 22,309 $ 22,309 $ 22,309 $ — $ — Securities held to maturity 38,482 38,255 — 38,255 — Loans receivable (1) 473,405 472,881 — — 472,881 Financial liabilities: Deposits 448,913 450,580 — 450,580 — Advances from Federal Home Loan Bank of New York 37,675 37,400 — 37,400 — (1) Includes impaired loans measured at fair value on a non-recurring basis as discussed above.

Parent Only Financial Stateme_2

Parent Only Financial Statements (Tables)	12 Months Ended
	Dec. 31, 2018
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Balance Sheet	At At (In thousands) Assets Cash and due from banks $ 1,953 $ 11,639 Loan receivable 2,003 2,094 Investments in subsidiaries 61,741 58,843 Other assets 1,015 501 Total Assets $ 66,712 $ 73,077 Liabilities Other liabilities $ 66 $ 52 Total Liabilities 66 52 Stockholders' Equity Common stock 54 58 Paid-in capital 44,726 51,068 Retained earnings 23,498 23,641 Unallocated common stock held by ESOP (1,632 ) (1,742 ) Total Stockholders' Equity 66,646 73,025 Total Liabilities and Stockholders' Equity $ 66,712 $ 73,077
Condensed Income Statement	Condensed Statements of Comprehensive Income Years Ended December 31, 2018 2017 (In thousands) Dividends from Subsidiaries $ 2,452 $ — Equity in undistributed earnings of subsidiaries 2,569 2,846 Interest income 67 70 Non-interest expense (283 ) (257 ) Income Before Income Tax Benefit 4,805 2,659 Income tax benefit (30 ) (63 ) Net Income $ 4,835 $ 2,722 Comprehensive Income $ 4,835 $ 2,844
Condensed Cash Flow Statement	Condensed Statements of Cash Flows Years Ended December 31, 2018 2017 (In thousands) Cash Flows from Operating Activities Net income $ 4,835 $ 2,722 Adjustments to reconcile net income to net cash provided by (used in) operating activities: Equity in undistributed earnings of subsidiaries (2,569 ) (2,846 ) Net change in other assets and liabilities (172 ) 127 Net Cash Provided by (Used in) Operating Activities 2,094 3 Cash Flows from Investing Activities Repayment of ESOP loan receivable 91 88 Net Cash Provided by Investing Activities 91 88 Cash Flows from Financing Activities Repurchase of common stock (6,840 ) (108 ) Proceeds from exercise of stock options — 571 Cash dividends paid to stockholders (4,978 ) (2,451 ) Net exercise of options and repurchase of shares (53 ) (1,672 ) Net Cash Used in Financing Activities $ (11,871 ) $ (3,660 ) Net Decrease in Cash and Cash Equivalents (9,686 ) (3,569 ) Cash and Cash Equivalents - Beginning 11,639 15,208 Cash and Cash Equivalents - Ending $ 1,953 $ 11,639

Organization and Business (Deta

Organization and Business (Details) $ / shares in Units, $ in Millions	Jul. 16, 2015USD ($)$ / sharesshares	Aug. 04, 2017$ / shares
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Common stock issued (in shares)	3,766,592
Share price (in usd per share) | $ / shares	$ 10	$ 17.30
Repurchase of common stock | $	$ 37.7
Expenses related to stock offering | $	$ 1.5
Employee Stock Ownership Plan [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Common stock issued, ESOP (in shares)	150,663
Successor [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Common stock issued (in shares)	2,187,242
Common stock conversion ratio (in shares)	1.1397

Summary of Significant Accoun_4

Summary of Significant Accounting Policies (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Trading securities	$ 0	$ 0
Available-for-sale securities	0	0
Other real estate owned	0	0
Carrying value of consumer loans	708,000
Adjustment for unrecognized income tax benefits	0	0
Income tax penalties and interest expense for unrecognized income tax benefits	0	0
Investment in Federal Home Loan Bank Stock [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Asset impairment charges	$ 0	$ 0
Accounting Standards Update 2016-02 | Subsequent Event
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Right-of-use asset			$ 1,300,000
Lease liability			$ 1,300,000

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Property, Plant and Equipment (Details)	12 Months Ended
	Dec. 31, 2018
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Leasehold improvements	Shorter of useful life or term of lease
Building and Building Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	5 years
Building and Building Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	50 years
Furniture and Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	3 years
Furniture and Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	7 years

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Computation of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Numerator:
Net income	$ 4,835	$ 2,722
Denominator:
Weighted average common shares (in shares)	5,351,000	5,550,000
Dilutive potential common shares (in shares)	49,000	95,000
Weighted average fully diluted shares (in shares)	5,400,000	5,645,000
Earnings per share:
Basic (in dollars per share)	$ 0.90	$ 0.49
Diluted (in dollars per share)	$ 0.90	$ 0.48
Outstanding common stock equivalents having no dilutive effect (in shares)	0	0

Securities Held to Maturity (De

Securities Held to Maturity (Details Textual)	12 Months Ended
	Dec. 31, 2018USD ($)bondsecurity	Dec. 31, 2017USD ($)bondcertificate_of_depositsecurity
Schedule of Held-to-maturity Securities [Line Items]
Proceeds from held-to-maturity securities | $	$ 0	$ 0
Held-to-maturity securities pledged as collateral | $	$ 2,000,000	$ 1,000,000
Certificates of Deposit [Member]
Schedule of Held-to-maturity Securities [Line Items]
Number of securities in unrealized loss positions | certificate_of_deposit		1
US Government Agencies Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Number of securities in unrealized loss positions | bond	2	5
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Number of securities in unrealized loss positions | security	20	16
Corporate Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Number of securities in unrealized loss positions	5	3
US States and Political Subdivisions Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Number of securities in unrealized loss positions | bond	6	4

Securities Held to Maturity - A

Securities Held to Maturity - Amortized Cost and Estimated Fair Value of Held-to-maturity Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 39,476	$ 38,482
Gross Unrealized Gains	153	271
Gross Unrealized Losses	1,060	498
Fair Value	38,569	38,255
US Government Agencies Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	8,000	5,500
Gross Unrealized Gains	11	0
Gross Unrealized Losses	18	42
Fair Value	7,993	5,458
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	23,936	23,839
Gross Unrealized Gains	142	263
Gross Unrealized Losses	299	207
Fair Value	23,779	23,895
Corporate Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	6,500	7,012
Gross Unrealized Gains	0	6
Gross Unrealized Losses	736	243
Fair Value	5,764	6,775
US States and Political Subdivisions Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	1,040	1,196
Gross Unrealized Gains	0	1
Gross Unrealized Losses	7	5
Fair Value	$ 1,033	1,192
Certificates of Deposit [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost		935
Gross Unrealized Gains		1
Gross Unrealized Losses		1
Fair Value		$ 935

Securities Held to Maturity - H

Securities Held to Maturity - Held-to-maturity Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 39,476	$ 38,482
Fair Value	38,569	38,255
US Government Agencies Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost, due within one year	2,000
Fair value, due within one year	1,982
Amortized cost, due after one year to five years	0
Fair value, due after one year to five years	0
Amortized cost, due after five through ten years	3,000
Fair value, due after five through ten years	3,002
Amortized cost, due thereafter	3,000
Fair value, due thereafter	3,009
Amortized Cost	8,000	5,500
Fair Value	7,993	5,458
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost, due within one year	898
Fair value, due within one year	891
Amortized cost, due after one year to five years	15,563
Fair value, due after one year to five years	15,539
Amortized cost, due after five through ten years	3,241
Fair value, due after five through ten years	3,150
Amortized cost, due thereafter	4,234
Fair value, due thereafter	4,199
Amortized Cost	23,936	23,839
Fair Value	23,779	23,895
Corporate Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost, due within one year	0
Fair value, due within one year	0
Amortized cost, due after one year to five years	1,500
Fair value, due after one year to five years	1,487
Amortized cost, due after five through ten years	1,000
Fair value, due after five through ten years	910
Amortized cost, due thereafter	4,000
Fair value, due thereafter	3,367
Amortized Cost	6,500	7,012
Fair Value	5,764	6,775
US States and Political Subdivisions Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost, due within one year	161
Fair value, due within one year	160
Amortized cost, due after one year to five years	697
Fair value, due after one year to five years	692
Amortized cost, due after five through ten years	182
Fair value, due after five through ten years	181
Amortized Cost	1,040	1,196
Fair Value	$ 1,033	$ 1,192

Securities Held to Maturity -_2

Securities Held to Maturity - Held-to-maturity Securities in Unrealized Loss Positions (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
Schedule of Held-to-maturity Securities [Line Items]
Securities in an unrealized loss position, less than 12 months, fair value	$ 1,675		$ 9,696
Securities in an unrealized loss position, less than 12 months, gross unrealized losses	15		95
Securities in an unrealized loss position, more than 12 months, fair value	22,317		14,772
Securities in an unrealized loss position, more than 12 months, gross unrealized losses	1,045		403
Securities in an unrealized loss position, fair value	23,992		24,468
Securities in an unrealized loss position, gross unrealized losses	1,060		498
Certificates of Deposit [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities in an unrealized loss position, less than 12 months, fair value			245
Securities in an unrealized loss position, less than 12 months, gross unrealized losses			1
Securities in an unrealized loss position, more than 12 months, fair value			0
Securities in an unrealized loss position, more than 12 months, gross unrealized losses			0
Securities in an unrealized loss position, fair value			245
Securities in an unrealized loss position, gross unrealized losses			1
US Government Agencies Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities in an unrealized loss position, less than 12 months, fair value		$ 0	1,000
Securities in an unrealized loss position, less than 12 months, gross unrealized losses		0	1
Securities in an unrealized loss position, more than 12 months, fair value		1,982	4,458
Securities in an unrealized loss position, more than 12 months, gross unrealized losses		18	41
Securities in an unrealized loss position, fair value	1,982		5,458
Securities in an unrealized loss position, gross unrealized losses	18		42
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities in an unrealized loss position, less than 12 months, fair value		8	7,796
Securities in an unrealized loss position, less than 12 months, gross unrealized losses		1	88
Securities in an unrealized loss position, more than 12 months, fair value		15,205	5,558
Securities in an unrealized loss position, more than 12 months, gross unrealized losses		298	119
Securities in an unrealized loss position, fair value	15,213		13,354
Securities in an unrealized loss position, gross unrealized losses	299		207
Corporate Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities in an unrealized loss position, less than 12 months, fair value		1,487	0
Securities in an unrealized loss position, less than 12 months, gross unrealized losses		13	0
Securities in an unrealized loss position, more than 12 months, fair value		4,277	4,756
Securities in an unrealized loss position, more than 12 months, gross unrealized losses		723	243
Securities in an unrealized loss position, fair value	5,764		4,756
Securities in an unrealized loss position, gross unrealized losses	736		243
US States and Political Subdivisions Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities in an unrealized loss position, less than 12 months, fair value		180	655
Securities in an unrealized loss position, less than 12 months, gross unrealized losses		1	5
Securities in an unrealized loss position, more than 12 months, fair value		853	0
Securities in an unrealized loss position, more than 12 months, gross unrealized losses		$ 6	0
Securities in an unrealized loss position, fair value	1,033		655
Securities in an unrealized loss position, gross unrealized losses	$ 7		$ 5

Loans Receivable and Allowanc_3

Loans Receivable and Allowance for Loan Losses - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)loan	Dec. 31, 2017USD ($)loan
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	$ 519,132	$ 499,161
Financing receivable modification period of lower interest	1 year
Troubled debt restructuring loans	$ 11,400	$ 11,400
Loans modified into TDRs, during the period subsequent to default | loan	0	0
Performing Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Troubled debt restructuring loans	$ 10,500	$ 9,700
Nonperforming Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Troubled debt restructuring loans	915	1,700
Commercial and Industrial Portfolio Segment, Secured [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	60,426
Commercial And Industrial Portfolio Segment, Unsecured [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	48
Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	167,756	184,679
Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	$ 24,365	$ 26,803

Loans Receivable and Allowanc_4

Loans Receivable and Allowance for Loan Losses - Composition of Total Loans Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	$ 519,132	$ 499,161
Loans in process	10,677	19,868
Deferred loan fees	501	474
Allowance for loan losses	5,655	5,414
Total Adjustments	16,833	25,756
Loans receivable, net	502,299	473,405
Residential Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	167,756	184,679
Residential Portfolio Segment [Member] | One-to-Four Family [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	143,391	157,876
Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	24,365	26,803
Commercial and Multi-Family Real Estate Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	212,606	196,681
Construction Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	29,628	43,718
Commercial and Industrial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	108,602	73,465
Commercial And Industrial Portfolio Segment, Unsecured [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	48
Commercial and Multi-family Real Estate, Construction and Commercial and Industrial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	350,836	313,864
Consumer Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	$ 540	$ 618

Loans Receivable and Allowanc_5

Loans Receivable and Allowance for Loan Losses - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	$ 5,414	$ 4,476
Provisions	240	1,185
Loans charged-off	(8)	(255)
Recoveries	9	8
Ending Balance	5,655	5,414
Period-end allowance allocated to:
Loans individually evaluated for impairment	415	28
Loans collectively evaluated for impairment	5,240	5,386
Period-end loan balances evaluated for:
Loans individually evaluated for impairment	14,614	14,872
Loans collectively evaluated for impairment	493,340	463,947
Ending balance	507,954	478,819
Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	1,852	1,808
Provisions	255	215
Loans charged-off	0	(178)
Recoveries	8	7
Ending Balance	2,115	1,852
Period-end allowance allocated to:
Loans individually evaluated for impairment	326	0
Loans collectively evaluated for impairment	1,789	1,852
Period-end loan balances evaluated for:
Loans individually evaluated for impairment	11,960	12,609
Loans collectively evaluated for impairment	155,746	171,988
Ending balance	167,706	184,597
Commercial and Multi-Family Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	2,267	1,441
Provisions	(80)	869
Loans charged-off	0	(43)
Recoveries	0	0
Ending Balance	2,187	2,267
Period-end allowance allocated to:
Loans individually evaluated for impairment	69	0
Loans collectively evaluated for impairment	2,118	2,267
Period-end loan balances evaluated for:
Loans individually evaluated for impairment	2,411	2,057
Loans collectively evaluated for impairment	209,879	194,373
Ending balance	212,290	196,430
Construction Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	302	248
Provisions	(80)	54
Loans charged-off	0	0
Recoveries	0	0
Ending Balance	222	302
Period-end allowance allocated to:
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	222	302
Period-end loan balances evaluated for:
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	18,905	23,803
Ending balance	18,905	23,803
Commercial and Industrial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	710	882
Provisions	418	(143)
Loans charged-off	0	(30)
Recoveries	0	1
Ending Balance	1,128	710
Period-end allowance allocated to:
Loans individually evaluated for impairment	20	27
Loans collectively evaluated for impairment	1,108	683
Period-end loan balances evaluated for:
Loans individually evaluated for impairment	243	205
Loans collectively evaluated for impairment	108,270	73,167
Ending balance	108,513	73,372
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	5	6
Provisions	5	3
Loans charged-off	(8)	(4)
Recoveries	1	0
Ending Balance	3	5
Period-end allowance allocated to:
Loans individually evaluated for impairment	0	1
Loans collectively evaluated for impairment	3	4
Period-end loan balances evaluated for:
Loans individually evaluated for impairment	0	1
Loans collectively evaluated for impairment	540	616
Ending balance	540	617
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	278	91
Provisions	(278)	187
Loans charged-off	0	0
Recoveries	0	0
Ending Balance	0	278
Period-end allowance allocated to:
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	0	278
Period-end loan balances evaluated for:
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	0	0
Ending balance	$ 0	$ 0

Loans Receivable and Allowanc_6

Loans Receivable and Allowance for Loan Losses - Past Due Financing Receivables (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, past due	$ 3,373	$ 2,773
Aging current balances	500,450	472,071
Nonaccrual Loans	4,131	3,975
Ending balance	507,954	478,819
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, past due	2,931	1,894
Nonaccrual Loans	556	631
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, past due	440	721
Nonaccrual Loans	123	341
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, past due	2	158
Nonaccrual Loans	2,200	1,700
Financing Receivables, 1 to 29 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	1,200	1,300
Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Ending balance	167,706	184,597
Residential Portfolio Segment [Member] | One-to-Four Family Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, past due		1,921
Aging current balances		152,425
Nonaccrual Loans		3,446
Ending balance		157,792
Residential Portfolio Segment [Member] | One-to-Four Family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, past due	1,695
Aging current balances	139,371
Nonaccrual Loans	2,276
Ending balance	143,342
Residential Portfolio Segment [Member] | One-to-Four Family [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, past due	1,328	1,221
Residential Portfolio Segment [Member] | One-to-Four Family [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, past due	365	700
Residential Portfolio Segment [Member] | One-to-Four Family [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, past due	2	0
Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, past due	1,677	778
Aging current balances	22,079	25,912
Nonaccrual Loans	608	115
Ending balance	24,364	26,805
Residential Portfolio Segment [Member] | Home Equity Loan [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, past due	1,602	605
Residential Portfolio Segment [Member] | Home Equity Loan [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, past due	75	16
Residential Portfolio Segment [Member] | Home Equity Loan [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, past due	0	157
Commercial and Multi-Family Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, past due	0	0
Aging current balances	211,258	196,115
Nonaccrual Loans	1,032	315
Ending balance	212,290	196,430
Commercial and Multi-Family Real Estate Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, past due	0	0
Commercial and Multi-Family Real Estate Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, past due	0	0
Commercial and Multi-Family Real Estate Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, past due	0	0
Construction Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, past due	0	0
Aging current balances	18,905	23,803
Nonaccrual Loans	0	0
Ending balance	18,905	23,803
Construction Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, past due	0	0
Construction Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, past due	0	0
Construction Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, past due	0	0
Commercial and Industrial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, past due	0	68
Aging current balances	108,298	73,205
Nonaccrual Loans	215	99
Ending balance	108,513	73,372
Commercial and Industrial Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, past due	0	68
Commercial and Industrial Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, past due	0	0
Commercial and Industrial Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, past due	0	0
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, past due	1	6
Aging current balances	539	611
Nonaccrual Loans	0	0
Ending balance	540	617
Consumer Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, past due	1	0
Consumer Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, past due	0	5
Consumer Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable, past due	$ 0	$ 1

Loans Receivable and Allowanc_7

Loans Receivable and Allowance for Credit Losses - Impaired Loans by Class (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
Recorded investment	$ 14,614	$ 14,872
Loans with no related reserve	4,193	14,839
Loans with related reserve	10,421	33
Related reserve	415	28
Contractual principal balance	16,063	16,174
Average loan balances	14,085	15,675
Residential Portfolio Segment [Member] | One-to-Four Family [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	10,224	11,181
Loans with no related reserve	1,956	11,181
Loans with related reserve	8,268	0
Related reserve	298	0
Contractual principal balance	10,907	11,729
Average loan balances	10,392	12,256
Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	1,736	1,428
Loans with no related reserve	609	1,428
Loans with related reserve	1,127	0
Related reserve	28	0
Contractual principal balance	1,827	1,522
Average loan balances	1,484	1,335
Residential Portfolio Segment [Member] | Commercial and Multi-Family Real Estate Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	2,411
Loans with no related reserve	1,405
Loans with related reserve	1,006
Related reserve	69
Contractual principal balance	3,067
Average loan balances	2,059
Commercial and Multi-Family Real Estate Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment		2,057
Loans with no related reserve		2,057
Loans with related reserve		0
Related reserve		0
Contractual principal balance		2,680
Average loan balances		1,787
Construction [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	0	0
Loans with no related reserve	0	0
Loans with related reserve	0	0
Related reserve	0	0
Contractual principal balance	0	0
Average loan balances	0	0
Commercial and Industrial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	243	205
Loans with no related reserve	223	173
Loans with related reserve	20	32
Related reserve	20	27
Contractual principal balance	262	242
Average loan balances	149	296
Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	0	1
Loans with no related reserve	0	0
Loans with related reserve	0	1
Related reserve	0	1
Contractual principal balance	0	1
Average loan balances	$ 1	$ 1

Loans Receivable and Allowanc_8

Loans Receivable and Allowance for Loan Losses - Financing Receivable Credit Quality Indicators (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	$ 339,708	$ 293,605
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	336,136	290,747
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,367	1,415
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,717	1,033
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Commercial and Multi-Family Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	212,290	196,430
Commercial and Multi-Family Real Estate Portfolio Segment [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	209,206	193,982
Commercial and Multi-Family Real Estate Portfolio Segment [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,367	1,415
Commercial and Multi-Family Real Estate Portfolio Segment [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,717	1,033
Commercial and Multi-Family Real Estate Portfolio Segment [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Commercial and Multi-Family Real Estate Portfolio Segment [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	18,905	23,803
Construction [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	18,905	23,803
Construction [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Construction [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Construction [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Construction [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Commercial and Industrial Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	108,513	73,372
Commercial and Industrial Portfolio Segment [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	108,025	72,962
Commercial and Industrial Portfolio Segment [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	69	182
Commercial and Industrial Portfolio Segment [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	419	228
Commercial and Industrial Portfolio Segment [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Commercial and Industrial Portfolio Segment [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	$ 0	$ 0

Loans Receivable and Allowanc_9

Loans Receivable and Allowance for Loan Losses - Impaired Financing Receivable Performance Status (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Total Loans Receivables	$ 507,954	$ 478,819
Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans Receivables	167,706	184,597
Residential Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans Receivables	2,884	3,718
Residential Portfolio Segment [Member] | Performing Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans Receivables	164,822	180,879
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans Receivables	540	617
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans Receivables	0	1
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans Receivables	540	616
Total Residential and Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans Receivables	168,246	185,214
Total Residential and Consumer [Member] | Nonperforming Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans Receivables	2,884	3,719
Total Residential and Consumer [Member] | Performing Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans Receivables	$ 165,362	$ 181,495

Loans Receivable and Allowan_10

Loans Receivable and Allowance for Loan Losses - Troubled Debt Restructuring (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)contract	Dec. 31, 2018USD ($)	Dec. 31, 2018USD ($)loan	Dec. 31, 2017USD ($)contract	Dec. 31, 2017USD ($)	Dec. 31, 2017USD ($)loan
Financing Receivable, Modifications [Line Items]
Troubled debt restructuring loans	$ 11,400	$ 11,400	$ 11,400	$ 11,400	$ 11,400	$ 11,400
Interest income on impaired loans	$ 543	543	$ 543
Number of contracts	1		1	13		13
Number of troubled debt restructuring into which loans were modified | loan						6
Pre-modification outstanding recorded investment		374			1,852
Post-modification outstanding recorded investments		392			1,976
Residential Portfolio Segment [Member] | One-to-Four Family [Member]
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	0			4
Pre-modification outstanding recorded investment		0			1,019
Post-modification outstanding recorded investments		0			1,283
Residential Portfolio Segment [Member] | One-to-Four Family [Member] | Extended Maturity [Member]
Financing Receivable, Modifications [Line Items]
Number of contracts | loan						1
Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	0			2
Pre-modification outstanding recorded investment		0			99
Post-modification outstanding recorded investments		0			0
Residential Portfolio Segment [Member] | Home Equity Loan [Member] | Fixed Interest Rate to Adjustable Interest Rate [Member]
Financing Receivable, Modifications [Line Items]
Number of contracts | loan						1
Commercial and Multi-Family Real Estate Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	1			1
Pre-modification outstanding recorded investment		374			419
Post-modification outstanding recorded investments		392			661
Commercial and Multi-Family Real Estate Portfolio Segment [Member] | Extended Maturity [Member]
Financing Receivable, Modifications [Line Items]
Number of troubled debt restructuring into which loans were modified | loan						1
Commercial Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	0			6
Pre-modification outstanding recorded investment		0			315
Post-modification outstanding recorded investments		0			32
Commercial Portfolio Segment [Member] | Fixed Interest Rate to Adjustable Interest Rate [Member]
Financing Receivable, Modifications [Line Items]
Number of contracts | loan						3
Performing Financial Instruments [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructuring loans	$ 10,500	10,500	$ 10,500	$ 9,700	9,700	$ 9,700
Nonperforming Financial Instruments [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructuring loans	$ 915	$ 915	$ 915	$ 1,700	$ 1,700	$ 1,700

Premises and Equipment - Compon

Premises and Equipment - Components of Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 14,992	$ 14,937
Accumulated depreciation and amortization	(6,812)	(6,239)
Property, plant and equipment, net	8,180	8,698
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,937	1,937
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	8,555	8,555
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,430	1,430
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	3,070	2,988
Assets Being Developed for Future Use [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 0	$ 27

Accrued Interest Receivable - C

Accrued Interest Receivable - Components of Interest Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Accrued interest receivable	$ 1,615	$ 1,607
Loans [Member]
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Accrued interest receivable	1,504	1,480
Securities Held-to-maturity [Member]
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Accrued interest receivable	$ 111	$ 127

Deposits - Narrative (Details)

Deposits - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Deposits [Abstract]
Certificate of deposit, minimum denomination of $250,000	$ 18.1	$ 17.4

Deposits - Deposit Liabilities

Deposits - Deposit Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Amount
Non-interest bearing demand	$ 46,690	$ 36,919
Interest demand	134,123	155,199
Savings	16,171	27,350
Money market demand	102,740	105,106
Certificates of deposit	120,855	124,339
Total Deposits	$ 420,579	$ 448,913
Average Rate
Interest demand	1.01%	0.71%
Savings	0.63%	0.33%
Money market demand	0.78%	0.59%
Certificates of deposit	1.77%	1.52%
Total deposits	1.01%	0.78%

Deposits - Certificates of Depo

Deposits - Certificates of Deposit by Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deposits [Abstract]
Within one year	$ 39,790	$ 41,198
One to two years	34,407	23,396
Two to three years	31,947	18,676
Three to four years	10,552	27,266
Four to five years	2,949	12,302
Thereafter	1,210	1,501
Time Deposits	$ 120,855	$ 124,339

Deposits - Interest Expense by

Deposits - Interest Expense by Deposit Type (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Deposits [Abstract]
Interest demand and money market demand	$ 1,257	$ 526
Savings and club	548	277
Certificates of deposit	2,029	1,647
Interest Expense, Deposits	$ 3,834	$ 2,450

Borrowings - Narrative (Details

Borrowings - Narrative (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Amount outstanding, unsecured line of credit	$ 0	$ 0
Fixed interest rate
Unsecured Debt [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Unsecured line of credit	$ 13,000,000	13,000,000
Federal Home Loan Bank of New York [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Remaining borrowing capacity	149,900,000	77,600,000
Federal Home Loan Bank advances	$ 66,600,000	$ 0
Fixed interest rate	2.60%

Borrowings - Term Advances Due

Borrowings - Term Advances Due to the FHLB (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Fixed interest rate
FHLB Advances	$ 27,675	$ 37,675
Federal Home Loan Bank of New York, Maturity, November 27, 2017 [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Fixed interest rate	3.46%
FHLB Advances	$ 0	10,000
Federal Home Loan Bank of New York, Maturity, July 6, 2020 [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Fixed interest rate	1.79%
FHLB Advances	$ 2,675	2,675
Federal Home Loan Bank of New York, Maturity, September 8, 2020 [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Fixed interest rate	1.75%
FHLB Advances	$ 5,000	5,000
Federal Home Loan Bank Of New York, Maturity, November 23, 2020 [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Fixed interest rate	2.27%
FHLB Advances	$ 10,000	10,000
Federal Home Loan Bank Of New York, Maturity, September 8, 2021 [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Fixed interest rate	1.89%
FHLB Advances	$ 5,000	5,000
Federal Home Loan Bank of New York, Maturity, September 8, 2022 [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Fixed interest rate	2.01%
FHLB Advances	$ 5,000	$ 5,000

Stockholders' Equity - Narrativ

Stockholders' Equity - Narrative (Details) - $ / shares	Jan. 01, 2019	Jan. 01, 2016	Dec. 31, 2018	Dec. 17, 2018	Aug. 04, 2017	Aug. 04, 2016	Jun. 02, 2016	Jul. 16, 2015
Equity, Class of Treasury Stock [Line Items]
Minimum common equity Tier 1 capital ratio			4.50%
Minimum total capital ratio of risk-weighted assets, required			8.00%
Tier 1 leverage capital, for capital adequacy purposes, ratio			4.00%
Capital conservation buffer, for capital adequacy purposes, ratio		0.625%	1.875%
Capital conservation buffer, for capital adequacy purposes, increase, ratio			0.625%
Share price (in usd per share)					$ 17.30			$ 10
Common Stock Repurchase Plan [Member]
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, number of shares authorized to be repurchased				273,150		595,342
Repurchased stock (in shares)			373,948
Share price (in usd per share)			$ 17.95
Restricted Stock [Member] | 2016 Plan [Member]
Equity, Class of Treasury Stock [Line Items]
Common stock, shares authorized for purchase			112,600				112,600
Scenario, Forecast [Member]
Equity, Class of Treasury Stock [Line Items]
Capital conservation buffer, for capital adequacy purposes, ratio	2.50%
Minimum [Member]
Equity, Class of Treasury Stock [Line Items]
Tier 1 capital, for capital adequacy purposes, ratio			4.00%
Maximum [Member]
Equity, Class of Treasury Stock [Line Items]
Tier 1 capital, for capital adequacy purposes, ratio			6.00%

Stockholders' Equity - Reconcil

Stockholders' Equity - Reconciliation of GAAP Capital and Regulatory Capital (Details) - USD ($) $ in Thousands	Dec. 31, 2018		Dec. 31, 2017
Tier 1 leverage capital ratio
For capital adequacy purposes, ratio	4.00%
Common equity tier 1 capital ratio
For capital adequacy purposes, ratio	4.50%
Total capital ratio
For capital adequacy purposes, ratio	8.00%
Millington Bank [Member]
Tier 1 leverage capital ratio
Actual, amount	$ 61,740		$ 58,843
Actual, ratio	10.71%		10.72%
For capital adequacy purposes, amount	$ 23,052	[1]	$ 21,951
For capital adequacy purposes, ratio	4.00%		4.00%
To be well capitalized, amount	$ 28,816		$ 27,439
To be well capitalized, ratio	5.00%		5.00%
Common equity tier 1 capital ratio
Actual, amount	$ 61,740		$ 58,843
Actual, ratio	11.90%		11.98%
For capital adequacy purposes, amount	$ 23,351	[1]	$ 22,098
For capital adequacy purposes, ratio	4.50%		4.50%
To be well capitalized, amount	$ 33,729		$ 31,919
To be well capitalized, ratio	6.50%		6.50%
Tier 1 capital ratio
Actual, amount	$ 61,740		$ 58,843
Actual, ratio	11.90%		11.98%
For capital adequacy purposes, amount	$ 31,134	[1]	$ 29,463
For capital adequacy purposes, ratio	6.00%		6.00%
To be well capitalized, amount	$ 41,512		$ 39,285
To be well capitalized, ratio	8.00%		8.00%
Total capital ratio
Actual, amount	$ 67,467		$ 64,304
Actual, ratio	13.00%		13.10%
For capital adequacy purposes, amount	$ 41,512	[1]	$ 39,285
For capital adequacy purposes, ratio	8.00%		8.00%
To be well capitalized, amount	$ 51,891		$ 49,106
To be well capitalized, ratio	10.00%		10.00%
MSB Financial Corp [Member]
Tier 1 leverage capital ratio
Actual, amount	$ 66,646		$ 73,025
Actual, ratio	11.56%		13.31%
For capital adequacy purposes, amount			$ 21,952
For capital adequacy purposes, ratio	4.00%		4.00%
Common equity tier 1 capital ratio
Actual, amount	$ 66,646		$ 73,025
Actual, ratio	12.84%		14.87%
For capital adequacy purposes, amount			$ 22,098
For capital adequacy purposes, ratio	4.50%		4.50%
Tier 1 capital ratio
Actual, amount	$ 66,646		$ 73,025
Actual, ratio	12.84%		14.87%
For capital adequacy purposes, amount			$ 29,463
For capital adequacy purposes, ratio	6.00%		6.00%
Total capital ratio
Actual, amount	$ 72,373		$ 78,486
Actual, ratio	13.95%		15.98%
For capital adequacy purposes, amount			$ 39,285
For capital adequacy purposes, ratio	8.00%		8.00%
[1]	Amounts and ratios do not include the capital conservation buffer.

Lease Commitments and Total R_3

Lease Commitments and Total Rental Expense - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Leases [Abstract]
Total rental expense, operating leases	$ 510	$ 478

Lease Commitments and Total R_4

Lease Commitments and Total Rental Expense - Future Minimum Lease Payments (Details) $ in Thousands	Dec. 31, 2018USD ($)
Leases [Abstract]
Within one year	$ 358
One to two years	332
Two to three years	289
Three to four years	198
Four to five years	203
Total future minimum lease payments due within next twelve months to five years	1,380
Thereafter	154
Total future minimum lease payments due	$ 1,534

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	Aug. 04, 2017	Dec. 31, 2018	Dec. 31, 2017	Jul. 16, 2015
Income Tax Disclosure [Abstract]
Federal income tax reconciliation rate		21.00%	34.00%
Granted (in shares)	212,468		212,468
Granted (in usd per share)	$ 9.4323		$ 9.4323
Share price (in usd per share)	$ 17.30			$ 10
Payments in cash in lieu of common stock issuance	$ 1,700		$ 1,700
Additional tax provision for revaluation			678
Operating loss carryforwards		$ 1,500
Retained earnings, no provision for income tax		$ 1,500	$ 1,500

Income Taxes - Income Tax Expen

Income Taxes - Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Current income tax expense:
Federal	$ 1,000	$ 957
State	518	298
Current income tax expense (benefit)	1,518	1,255
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Federal	180	550
State	113	(37)
Deferred income tax expense (benefit)	293	513
Income tax expense (benefit)	$ 1,811	$ 1,768

Income Taxes - Effective Income

Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Amount
Federal income tax at statutory rate	$ 1,396	$ 1,526
State tax, net of federal benefit	498	172
Bank Owned Life Insurance	(81)	(140)
ESOP and stock-based compensation	(11)	(486)
Impact of rate change on net deferred tax assets	0	678
Other	9	18
Income tax expense (benefit)	$ 1,811	$ 1,768
% of Pretax Income
Federal income tax at statutory rate	21.00%	34.00%
State tax, net of federal benefit	7.50%	3.80%
Bank Owned Life Insurance	(1.20%)	(3.10%)
ESOP and stock-based compensation	(0.20%)	(10.80%)
Impact of rate change on net deferred tax assets	0.00%	15.10%
Other	0.20%	0.40%
Percentage of pretax income	27.30%	39.40%

Income Taxes - Components of De

Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Allowances for losses on loans and commitments	$ 1,610	$ 1,535
Uncollected interest	48	9
Benefit plans	127	533
Restricted stock award	38	36
Deferred Rent	16	0
Accrued compensation	131	0
Other	55	0
Deferred tax assets, gross	2,025	2,113
Deferred tax liabilities
Depreciation	(427)	(423)
Deferred loan costs	125	0
Other	76	0
Deferred tax liabilities, gross	628	423
Net deferred tax asset included in other assets	$ 1,397	$ 1,690

Benefit Plans - Narrative (Deta

Benefit Plans - Narrative (Details) $ / shares in Units, $ in Thousands	Aug. 04, 2017USD ($)$ / sharesshares	Jul. 16, 2015USD ($)installments$ / sharesshares	Jan. 31, 2018USD ($)	Dec. 31, 2018USD ($)installmentshour$ / sharesshares	Dec. 31, 2017USD ($)$ / sharesshares	Dec. 31, 2016$ / sharesshares	Jun. 02, 2016shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
ESOP eligibility, minimum employment period				1 year
ESOP, eligibility, minimum age				21 years
ESOP, minimum service hour requirement | hour				1,000
Employer loan to ESOP | $		$ 2,300		$ 2,000
ESOP, shares purchased (in shares)				202,342
ESOP, number of principal payment installments | installments		80		48
ESOP employer loan, interest rate		3.25%		8.25%
ESOP, purchase of shares (in shares)		150,663
ESOP, conversion of stock (in shares)		202,342
ESOP, conversion rate (in shares)		1.1397
ESOP, conversion of stock shares issued (in shares)		230,609
ESOP, total shares for plan (in shares)		381,272
Additional funds to cover cost of purchasing shares | $		$ 1,500
ESOP, number of shares allocated per month (in shares)				910
ESOP, compensation expense | $				$ 210	$ 265
Exercise price per share, after conversion (in usd per share) | $ / shares		$ 9.4323
Granted (in shares)	212,468				212,468
Granted (in usd per share) | $ / shares	$ 9.4323				$ 9.4323
Payments in cash in lieu of common stock issuance | $	$ 1,700				$ 1,700
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Distribution period				12 months
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Distribution period				24 months
Deferred Profit Sharing [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum annual contributions per employee				80.00%
Employer matching contribution				50.00%
Employer matching contribution, percent of employees' gross pay				6.00%
Employer contribution percent				3.00%
Cost of The Plan | $				$ 88	$ 75
Directors Retirement Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Distribution amount | $			$ 1,400
2016 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price per share, after conversion (in usd per share) | $ / shares				$ 13.56	$ 13.27	$ 10.96
Granted (in shares)				10,556	10,556
Granted (in usd per share) | $ / shares				$ 17.6500	$ 17.3000
Fair value of options granted | $ / shares				$ 4.24	$ 3.71
Total amount of compensation cost remaining to be recognized, unvested option grants | $				$ 233	$ 322
Intrinsic value of options exercisable | $				322	205
Intrinsic value, options outstanding | $				472	954
Stock-based compensation expense | $				$ 328	$ 391
2016 Plan [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized for purchase				112,600			112,600
Shares remaining for future option grants (in shares)				13,597
Vesting period, options granted						5 years
Weighted-average period for recognition				2 years 6 months
Shares of restricted stock, awarded (in shares)						107,403
Fair value of restricted shares, unvested and outstanding | $ / shares				$ 13.04
Compensation cost to be recognized, non-vested restricted stock | $				$ 586
2016 Plan [Member] | Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized for purchase				281,499
Shares remaining for future option grants (in shares)				85,985
Risk-free interest rate				2.49%	1.98%
Expected option life				6 years 182 days	6 years 182 days
Expected stock price volatility				16.53%	15.41%
Dividend yield				0.00%	0.00%
Weighted-average period for recognition				2 years 6 months	3 years 182 days
2016 Plan [Member] | Employee Stock Option [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period for options				10 years	10 years
2016 Plan [Member] | Employee Stock Option [Member] | Annual Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage, options granted				20.00%	20.00%

Benefit Plans - Net Funded Stat

Benefit Plans - Net Funded Status (Details) - Directors Retirement Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation – ending	$ 0	$ 1,402
Change in Benefit Obligation
Projected benefit obligation – beginning	1,402	1,466
Service cost	0	0
Interest cost	0	20
Actuarial (gain) loss	0	0
Benefit payments	(1,402)	(84)
Curtailment	0	0
Projected benefit obligation – ending	0	1,402
Change in Fair Value of Plan Assets
Plan assets at fair value – beginning	0	0
Employer contribution	0	84
Benefit payments	0	(84)
Plan assets at fair value – ending	0	0
Funded status at end of year (included in other liabilities)	$ 0	$ 1,402
Assumptions:
Discount rate		1.41%

Benefit Plans - Net Periodic Pe

Benefit Plans - Net Periodic Pension Cost (Details) - Directors Retirement Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 0
Interest cost	0	20
Amortization of unrecognized loss	0	0
Amortization of unrecognized past service liability	0	202
Curtailment credit	0	0
Net periodic pension cost	$ 0	$ 222
Assumptions:
Rate of compensation		3.00%
Maximum [Member]
Assumptions:
Discount rate		4.50%
Weighted Average [Member]
Assumptions:
Discount rate		3.50%
Minimum [Member]
Assumptions:
Discount rate		1.12%

Benefit Plans - ESOP Plan Activ

Benefit Plans - ESOP Plan Activity (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan [Abstract]
Allocated shares (in shares)	190,882	179,956
Shares earned and committed to be released (in shares)	10,926	10,926
Allocated and earned (in shares)	201,808	190,882
Total ESOP shares (in shares)	381,272	381,272
Fair value of unallocated shares	$ 3,203,432	$ 3,388,942

Benefit Plans - Information abo

Benefit Plans - Information about Stock Options Outstanding (Details) - $ / shares	Aug. 04, 2017	Dec. 31, 2018	Dec. 31, 2017
Shares
Granted (in shares)	212,468		212,468
Weighted- Average Exercise Price
Granted (in usd per share)	$ 9.4323		$ 9.4323
2016 Plan [Member]
Shares
Outstanding at beginning of period (in shares)		210,448	472,973
Granted (in shares)		10,556	10,556
Exercised (in shares)		(10,511)	(273,081)
Forfeited (in shares)		(25,490)	0
Outstanding at end of period (in shares)		185,003	210,448
Nonvested at end of period		116,072	167,271
Weighted- Average Exercise Price
Outstanding at beginning of period (in usd per share)		$ 13.27	$ 10.96
Granted (in usd per share)		17.6500	17.3000
Exercised (in usd per share)		13.04	9.43
Forfeited (in usd per share)		13.04	0
Outstanding at end of period (in usd per share)		13.56	13.27
Nonvested at end of period (in usd per share)		$ 13.73	$ 13.32
Exercisable at end of period (in shares)		68,931	43,177
Exercisable at end of period (in usd per share)		$ 13.25	$ 13.05
Weighted-average fair value of awards granted (in usd per share)		$ 4.24	$ 3.71

Transactions with Officers an_2

Transactions with Officers and Directors (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Related Party Transactions [Abstract]
Related parties, indebtedness to bank, loan amounts	$ 8.2	$ 7.9
Related parties, value of new loans	1.7
Related parties, repayments made during the year	1.4
Loans related to director, no longer related party		$ 4.2
Deposits from related parties	$ 43.5

Commitments - Narrative (Detail

Commitments - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Other Commitments [Line Items]
Other Commitments	$ 88,518	$ 91,132
One to Four Family Mortgage Loans [Member] | Commitments to Grant Loans [Member]
Other Commitments [Line Items]
Other Commitments	281	95
Construction [Member] | Commitments to Grant Loans [Member]
Other Commitments [Line Items]
Other Commitments	4,800	4,500
Commercial and Multi-Family Estate [Member] | Commitments to Grant Loans [Member]
Other Commitments [Line Items]
Other Commitments	6,900	8,600
Commercial and Industrial [Member] | Commitments to Grant Loans [Member]
Other Commitments [Line Items]
Other Commitments	2,200	12,000
Residential Mortgage Home Equity [Member] | Unfunded Commitments Under Line of Credit [Member]
Other Commitments [Line Items]
Other Commitments	14,500	14,900
Consumer Overdraft Protection [Member] | Unfunded Commitments Under Line of Credit [Member]
Other Commitments [Line Items]
Other Commitments	414	428
Commercial Loan [Member] | Unfunded Commitments Under Line of Credit [Member]
Other Commitments [Line Items]
Other Commitments	$ 59,300	$ 50,200

Commitments - Financial Instrum

Commitments - Financial Instruments Whose Contract Amounts Represent Credit Risk (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Loss Contingencies [Line Items]
Other Commitments	$ 88,518	$ 91,132
Commitments to Grant Loans [Member]
Loss Contingencies [Line Items]
Other Commitments	14,236	25,176
Unfunded Commitments Under Line of Credit [Member]
Loss Contingencies [Line Items]
Other Commitments	74,123	65,597
Standby Letters of Credit [Member]
Loss Contingencies [Line Items]
Other Commitments	$ 159	$ 359

Fair Value Measurements - Narra

Fair Value Measurements - Narrative (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Financial assets measured at fair value, recurring basis	$ 0	$ 0

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value Assets Measured on Nonrecurring Basis (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 350	$ 6
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 350	$ 6

Fair Value Measurements - Addit

Fair Value Measurements - Additional Qualitative Information About Level 3 Assets (Details) - Level 3 [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Appraisal Adjustments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value estimate	$ 350	$ 6
Fair value estimate, percentage	0.00%	475.60%
Liquidation Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value estimate, percentage	7.30%	0.00%
Weighted Average [Member] | Appraisal Adjustments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value estimate, percentage	0.00%	475.60%
Weighted Average [Member] | Liquidation Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value estimate, percentage	7.30%	0.00%

Fair Value Measurements - Fai_2

Fair Value Measurements - Fair Value, Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financial assets:
Cash and due from banks	$ 11,800	$ 22,309	$ 21,382
Securities held to maturity, fair value	38,569	38,255
Accrued interest receivable	1,615	1,607
Financial liabilities:
Deposits	420,579	448,913
Reported Value Measurement [Member]
Financial assets:
Cash and due from banks	11,800	22,309
Securities held to maturity, fair value	39,476	38,482
Loans receivable	502,299	473,405
Accrued interest receivable	1,615
Financial liabilities:
Deposits	420,579	448,913
Advances from Federal Home Loan Bank of New York	94,275	37,675
Accrued interest payable	86
Estimate of Fair Value Measurement [Member]
Financial assets:
Cash and due from banks	11,800	22,309
Securities held to maturity, fair value	38,569	38,255
Loans receivable	490,177	472,881
Accrued interest receivable	1,615
Financial liabilities:
Deposits	421,164	450,580
Advances from Federal Home Loan Bank of New York	93,839	37,400
Accrued interest payable	86
Level 1 [Member] | Estimate of Fair Value Measurement [Member]
Financial assets:
Cash and due from banks	11,800	22,309
Securities held to maturity, fair value	0	0
Loans receivable	0	0
Accrued interest receivable	0
Financial liabilities:
Deposits	0	0
Advances from Federal Home Loan Bank of New York	0	0
Accrued interest payable	0
Level 2 [Member] | Estimate of Fair Value Measurement [Member]
Financial assets:
Cash and due from banks	0	0
Securities held to maturity, fair value	38,569	38,255
Loans receivable	0	0
Accrued interest receivable	111
Financial liabilities:
Deposits	421,164	450,580
Advances from Federal Home Loan Bank of New York	93,839	37,400
Accrued interest payable	86
Level 3 [Member] | Estimate of Fair Value Measurement [Member]
Financial assets:
Cash and due from banks	0	0
Securities held to maturity, fair value	0	0
Loans receivable	490,177	472,881
Accrued interest receivable	1,504
Financial liabilities:
Deposits	0	0
Advances from Federal Home Loan Bank of New York	0	$ 0
Accrued interest payable	$ 0

Parent Only Financial Stateme_3

Parent Only Financial Statements - Condensed Statements of Financial Condition (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Assets
Cash and due from banks	$ 1,558	$ 2,030
Loan receivable	502,299	473,405
Other assets	1,789	2,211
Total Assets	584,500	563,040
Liabilities
Other liabilities	2,251	2,741
Total Liabilities	517,854	490,015
Stockholders' Equity
Common stock	54	58
Paid-in capital	44,726	51,068
Retained earnings	23,498	23,641
Unallocated common stock held by ESOP	(1,632)	(1,742)
Total Stockholders' Equity	66,646	73,025
Total Liabilities and Stockholders' Equity	584,500	563,040
Parent Company [Member]
Assets
Cash and due from banks	1,953	11,639
Loan receivable	2,003	2,094
Investments in subsidiaries	61,741	58,843
Other assets	1,015	501
Total Assets	66,712	73,077
Liabilities
Other liabilities	66	52
Total Liabilities	66	52
Stockholders' Equity
Common stock	54	58
Paid-in capital	44,726	51,068
Retained earnings	23,498	23,641
Unallocated common stock held by ESOP	(1,632)	(1,742)
Total Stockholders' Equity	66,646	73,025
Total Liabilities and Stockholders' Equity	$ 66,712	$ 73,077

Parent Only Financial Stateme_4

Parent Only Financial Statements - Condensed Statements of Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Condensed Statement of Income Captions [Line Items]
Non-interest expense	$ (11,861)	$ (11,181)
Income before Income Taxes	6,646	4,490
Income tax benefit	1,811	1,768
Net Income	4,835	2,722
Comprehensive Income	4,835	2,844
Parent Company [Member]
Condensed Statement of Income Captions [Line Items]
Dividends from Subsidiaries	2,452	0
Equity in undistributed earnings of subsidiaries	2,569	2,846
Interest income	67	70
Non-interest expense	(283)	(257)
Income before Income Taxes	4,805	2,659
Income tax benefit	(30)	(63)
Net Income	4,835	2,722
Comprehensive Income	$ 4,835	$ 2,844

Parent Only Financial Stateme_5

Parent Only Financial Statements - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Cash Flows from Operating Activities
Net income	$ 4,835	$ 2,722
Adjustments to reconcile net income to net cash provided by operating activities:
Net Cash Provided by Operating Activities	5,723	4,898
Cash Flows from Investing Activities
Net Cash Used by Investing Activities	(32,690)	(101,819)
Cash Flows from Financing Activities
Repurchase of common stock	(6,840)	(108)
Proceeds from exercise of stock options	0	571
Cash dividends paid to stockholders	(4,978)	(2,451)
Net exercise of options and repurchase of shares	(53)	(1,672)
Net Cash Provided by Financing Activities	16,458	97,848
Net (decrease) increase in Cash and Cash Equivalents	(10,509)	927
Cash and Cash Equivalents – Ending	11,800	22,309
Cash and Cash Equivalents – Beginning	22,309	21,382
Parent Company [Member]
Cash Flows from Operating Activities
Net income	4,835	2,722
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in undistributed earnings of subsidiaries	(2,569)	(2,846)
Net change in other assets and liabilities	(172)	127
Net Cash Provided by Operating Activities	2,094	3
Cash Flows from Investing Activities
Repayment of ESOP loan receivable	91	88
Net Cash Used by Investing Activities	91	88
Cash Flows from Financing Activities
Repurchase of common stock	(6,840)	(108)
Proceeds from exercise of stock options	0	571
Cash dividends paid to stockholders	(4,978)	(2,451)
Net exercise of options and repurchase of shares	(53)	(1,672)
Net Cash Provided by Financing Activities	(11,871)	(3,660)
Net (decrease) increase in Cash and Cash Equivalents	(9,686)	(3,569)
Cash and Cash Equivalents – Ending	1,953	11,639
Cash and Cash Equivalents – Beginning	$ 11,639	$ 15,208