Prime Meridian Holding (PMHG) 10-K 20 Mar 18 2017 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2017	Mar. 12, 2018	Jun. 30, 2017
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Trading Symbol	PMHG
Entity Registrant Name	Prime Meridian Holding Co
Entity Central Index Key	1,586,454
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		3,120,569
Entity Public Float			$ 43,384,841

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Assets
Cash and due from banks	$ 6,971	$ 4,817
Federal funds sold	20,148	25,963
Interest-bearing deposits	5,278	5,385
Total cash and cash equivalents	32,397	36,165
Securities available for sale	49,809	33,103
Loans held for sale	5,880	3,291
Loans, net of allowance for loan losses of $3,136 and $2,876	250,259	222,768
Federal Home Loan Bank stock	316	220
Premises and equipment, net	4,872	4,929
Deferred tax asset	339	533
Accrued interest receivable	978	798
Bank-owned life insurance	1,757	1,711
Other assets	573	423
Total assets	347,180	303,941
Liabilities:
Noninterest-bearing demand deposits	76,216	61,856
Savings, NOW and money-market deposits	200,027	192,768
Time deposits	22,054	20,723
Total deposits	298,297	275,347
Official checks	1,146	632
Other liabilities	764	880
Total liabilities	300,207	276,859
Commitments and contingencies (notes 4, 8, and 15)
Stockholders' equity:
Preferred stock, undesignated; 1,000,000 shares authorized, none issued or outstanding
Common stock, $.01 par value; 9,000,000 shares authorized, 3,118,977 and 2,004,707 issued and outstanding	31	20
Additional paid-in capital	37,953	20,732
Retained earnings	9,285	6,563
Accumulated other comprehensive loss	(296)	(233)
Total stockholders' equity	46,973	27,082
Total liabilities and stockholders' equity	$ 347,180	$ 303,941

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Loans receivable, allowance for loan losses	$ 3,136	$ 2,876
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	9,000,000	9,000,000
Common stock, shares issued	3,118,977	2,004,707
Common stock, shares outstanding	3,118,977	2,004,707

Consolidated Statements of Earn

Consolidated Statements of Earnings - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Interest income:
Loans	$ 11,589	$ 9,956
Securities	983	700
Other	379	117
Total interest income	12,951	10,773
Interest expense:
Deposits	1,181	829
Other borrowings		1
Total interest expense	1,181	830
Net interest income	11,770	9,943
Provision for loan losses	256	424
Net interest income after provision for loan losses	11,514	9,519
Noninterest income:
Service charges and fees on deposit accounts	322	250
Mortgage banking revenue	1,255	935
Income from bank-owned life insurance	46	49
(Loss) gain on sale of securities available for sale	(1)	102
Other income	351	294
Total noninterest income	1,973	1,630
Noninterest expense:
Salaries and employee benefits	5,056	4,131
Occupancy and equipment	947	907
Professional fees	320	346
Advertising	574	487
FDIC assessment	158	152
Software maintenance, amortization and other	535	501
Other	1,345	1,188
Total noninterest expense	8,935	7,712
Earnings before income taxes	4,552	3,437
Income taxes	1,735	1,217
Net earnings	$ 2,817	$ 2,220
Earnings per common share:
Basic	$ 1.04	$ 1.12
Diluted	$ 1.04	$ 1.11

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net Earnings	$ 2,817	$ 2,220
Change in unrealized loss on securities:
Unrealized loss arising during the year	(27)	(358)
Reclassification adjustment for realized loss (gain)	1	(102)
Net change in unrealized loss	(26)	(460)
Deferred income tax benefit on above change	8	171
One-time reclassification for newly enacted corporate tax rate	(45)
Total other comprehensive loss	(63)	(289)
Comprehensive income	$ 2,754	$ 1,931

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance, Value at Dec. 31, 2015	$ 24,933	$ 20	$ 20,415	$ 4,442	$ 56
Beginning Balance, Shares at Dec. 31, 2015		1,975,329
Net Earnings	2,220			2,220
Dividends paid	(99)			(99)
Net change in unrealized loss on securities available for sale, net of income tax benefit	(289)				(289)
Stock options exercised, Value	261		261
Stock options exercised, Shares		25,450
Common stock issued as compensation to directors, Value	55		55
Common stock issued as compensation to directors, Shares		3,928
Stock-based compensation	1		1
Ending Balance, Value at Dec. 31, 2016	$ 27,082	$ 20	20,732	6,563	(233)
Ending Balance, Shares at Dec. 31, 2016	2,004,707	2,004,707
Net Earnings	$ 2,817			2,817
Dividends paid	(140)			(140)
Net change in unrealized loss on securities available for sale, net of income tax benefit	(63)
Net change in unrealized loss on securities available for sale, net of income tax benefit of $8 and one-time reclassification for newly enacted corporate tax rate	(18)			45	(63)
Stock options exercised, Value	195		195
Stock options exercised, Shares		19,450
Common stock issued as compensation to directors, Value	65		65
Common stock issued as compensation to directors, Shares		3,912
Sale of common stock net of stock offering costs, Value	16,957	$ 11	16,946
Sale of common stock net of stock offering costs, Shares		1,090,908
Stock-based compensation	15		15
Ending Balance, Value at Dec. 31, 2017	$ 46,973	$ 31	$ 37,953	$ 9,285	$ (296)
Ending Balance, Shares at Dec. 31, 2017	3,118,977	3,118,977

Consolidated Statements of Sto7

Consolidated Statements of Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Income tax benefit portion of change in unrealized loss on available for sale securities	$ 8	$ 171
Sale of common stock, net of stock offering costs	1,043
Additional Paid-in Capital [Member]
Sale of common stock, net of stock offering costs	1,043
Accumulated Other Comprehensive Income (Loss) [Member]
Income tax benefit portion of change in unrealized loss on available for sale securities	$ 8	$ 171

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net Earnings	$ 2,817	$ 2,220
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	519	528
Provision for loan losses	256	424
Net amortization of deferred loan fees	(74)	(64)
Deferred income taxes	202	6
Loss (gain) on sale of securities available for sale	1	(102)
Amortization of premiums and discounts on securities available for sale	425	430
Gain on sale of loans held for sale	(1,101)	(813)
Proceeds from the sale of loans held for sale	65,905	49,739
Loans originated as held for sale	(67,393)	(49,495)
Stock issued as compensation	65	55
Stock-based compensation expense	15	1
Income from bank-owned life insurance	(46)	(49)
Net increase in accrued interest receivable	(180)	(106)
Net (increase) decrease in other assets	(150)	198
Net increase (decrease) in other liabilities and official checks	398	(26)
Net cash provided by operating activities	1,659	2,946
Cash flows from investing activities:
Loan originations, net of principal repayments	(27,673)	(36,052)
Purchase of securities available for sale	(23,524)	(13,425)
Principal repayments of securities available for sale	5,553	7,892
Proceeds from the sale of securities available for sale	750	8,248
Maturities and calls of securities available for sale	63	1,457
Purchase of Federal Home Loan Bank stock	(96)	(31)
Purchase of premises and equipment	(462)	(1,235)
Net cash used in investing activities	(45,389)	(33,146)
Cash flows from financing activities:
Net increase in deposits	22,950	57,774
Proceeds from stock options exercised	195	261
Proceeds from sale of common stock, net	16,957
Dividends paid	(140)	(99)
Net cash provided by financing activities	39,962	57,936
Net (decrease) increase in cash and cash equivalents	(3,768)	27,736
Cash and cash equivalents at beginning of year	36,165	8,429
Cash and cash equivalents at end of year	32,397	36,165
Supplemental disclosure of cash flow information Cash paid during the year for:
Interest	1,179	830
Income taxes	1,698	1,030
Noncash transactions:
Accumulated other comprehensive loss, net change in unrealized loss on securities available for sale, net of tax benefit	(18)	$ (289)
One-time reclassification for newly enacted corporate tax rate	$ (45)

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	(1) Summary of Significant Accounting Policies Organization. The following is a description of the significant accounting policies and practices followed by the Company, which conform to accounting principles generally accepted in the United States of America (“GAAP”) and prevailing practices within the banking industry. Use of Estimates. Principles of Consolidation. Cash and Cash Equivalents. At December 31, 2017 and 2016, the Company was required by law or regulation to maintain cash reserves with the Federal Reserve Bank, in noninterest-bearing accounts with other banks or in the vault in the amounts of $2,618,000 and $1,799,000 respectively. Securities. held-to-maturity available-for-sale. Held-to-maturity Available-for-sale held-to-maturity available-for-sale available-for-sale specific-identification Management evaluates securities for other-than-temporary impairment at least on a quarterly basis, and more frequently when economic or market concerns warrant such evaluation. Consideration is given to (1) the length of time and the extent to which the fair value has been less than cost, (2) the financial condition and near-term prospects of the issuer, and (3) the intent and ability of the Company to retain its investment in the issuer for a period of time sufficient to allow for any anticipated recovery in fair value. Loans Held for Sale. Loans. pay-off charge-offs, Commitment and loan origination fees are deferred and certain direct origination costs are capitalized. Both are recognized as an adjustment of the yield of the related loan. The accrual of interest on all portfolio classes is discontinued at the time the loan is ninety-days delinquent unless the loan is well collateralized and in the process of collection. In all cases, loans are placed on nonaccrual or charged off at an earlier date if collection of principal or interest is considered doubtful. All interest accrued but not collected for loans that are placed on nonaccrual or loans that are charged off is reversed against interest income. The interest on these loans is accounted for on the cash-basis or cost-recovery method, until qualifying for return to accrual. Loans are returned to accrual status when all of the principal and interest amounts contractually due are brought current and future payments are reasonably assured. Allowance for Loan Losses. The allowance for loan losses is evaluated on a regular basis by management and is based upon management’s periodic review of the collectability of the loans in light of historical experience, the nature and volume of the loan portfolio, adverse situations that may affect the borrower’s ability to repay, estimated value of any underlying collateral and prevailing economic conditions. This evaluation is inherently subjective as it requires estimates that are susceptible to significant revision as more information becomes available. The allowance consists of specific and general components. The specific component relates to loans that are considered impaired. For such loans, an allowance is established when the discounted cash flows or collateral value of the impaired loan is lower than the carrying value of that loan. The general component covers all other loans and is based on the following factors. The historical loss component of the allowance is determined by losses recognized by portfolio segment over the preceding thirty-six Allowance for Loan Losses, Continued. case-by-case loan-by-loan Premises and Equipment. Transfer of Financial Assets. Off-Balance off-balance-sheet Income Taxes. Deferred tax assets are recognized if it is more likely than not, based on the technical merits, that the tax position will be realized or sustained upon examination. The term “more likely than not” means a likelihood of more than 50 percent; the terms examined and upon examination also include resolution of the related appeals or litigation processes, if any. Income Taxes, Continued. more-likely-than-not more-likely-than-not The Company recognizes interest and penalties on income taxes as a component of income tax expense. The Company files consolidated income tax returns. Income taxes are allocated to the Holding Company and Bank as if separate income tax returns were filed. Fair Value Measurements. Level 1: Observable inputs such as quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2: Inputs other than quoted prices that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities that are not active; and model-driven valuations whose inputs are observable or whose significant value drivers are observable. Valuations may be obtained from, or corroborated by, third-party pricing services. Level 3: Unobservable inputs to measure fair value of assets and liabilities for which there is little, if any market activity at the measurement date, using reasonable inputs and assumptions based upon the best information at the time, to the extent that inputs are available without undue cost and effort. The following describes valuation methodologies used for assets measured at fair value: Securities Available for Sale. Impaired Loans. Fair Values of Financial Instruments. Cash and Cash Equivalents. Securities. Loans Held for Sale. Loans. one-to-four Federal Home Loan Bank Stock. Accrued Interest Receivable. Deposits. Off-Balance off-balance Advertising. Stock-Based Compensation. Comprehensive Income. available-for-sale Mortgage Banking Revenue. Recent Accounting Standards Update. No. 2016-01, Financial Instruments-Overall (Subtopic 825-10): available-for-sale In February 2016, the FASB issued ASU No. 2016-2, Leases (Topic 842) In March 2016, the FASB issued ASU No. 2016-09, Compensation-Stock Compensation (Topic 718) In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326) available-for-sale Recent Accounting Standards Update, Continued. ASU No. 2017-01, Business In March 2017, the FASB issued ASU No. 2017-08, In February 2018, the FASB issued ASU No. 2018-0 2 Income Statement Reporting Comprehensive Income (Topic 220)

Securities Available for Sale

Securities Available for Sale	12 Months Ended
	Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Securities Available for Sale	(2) Securities Available for Sale Securities have been classified according to management’s intention. The carrying amount of securities and their fair values are summarized as follows: Gross Gross Amortized Unrealized Unrealized Fair Cost Gains Losses Value (in thousands) At December 31, 2017 U.S. Government agency securities $ 1,251 $ 6 $ (8) $ 1,249 Municipal securities 12,340 128 (95) 12,373 Mortgage-backed securities 36,614 23 (450) 36,187 Total $ 50,205 $ 157 $ (553) $ 49,809 At December 31, 2016 U.S. Government agency securities $ 2,186 $ 2 $ (17) $ 2,171 Municipal securities 12,614 91 (282) 12,423 Mortgage-backed securities 18,673 36 (200) 18,509 Total $ 33,473 $ 129 $ (499) $ 33,103 Securities available for sale measured at fair value on a recurring basis are summarized below: Fair Value Measurements Using Quoted Prices In Active Significant Markets for Other Significant Identical Observable Unobservable Fair Assets Inputs Inputs Value (Level 1) (Level 2) (Level 3) (in thousands) At December 31, 2017 U.S. Government agency securities $ 1,249 $ - $ 1,249 $ - Municipal securities 12,373 - 12,373 - Mortgage-backed securities 36,187 - 36,187 - Total $ 49,809 $ - $ 49,809 $ - At December 31, 2016 U.S. Government agency securities $ 2,171 $ - $ 2,171 $ - Municipal securities 12,423 - 12,423 - Mortgage-backed securities 18,509 - 18,509 - Total $ 33,103 $ - $ 33,103 $ - During the years ended December 31, 2017 and 2016, no securities were transferred in or out of Level 1, Level 2 or Level 3. The scheduled maturities of securities are as follows: Amortized Fair Cost Value (in thousands) At December 31, 2017 Due in less than one year $ 511 $ 511 Due in one to five years 2,452 2,417 Due in five to ten years 7,863 7,951 Due after ten years 2,765 2,743 Mortgage-backed securities 36,614 36,187 Total $ 50,205 $ 49,809 The following summarizes sales of securities available for sale: Year Ended December 31, (in thousands) 2017 2016 Proceeds from sale of securities $ 750 $ 8,248 Gross gains - 102 Gross losses (1 ) - Net (loss) gain on sale of securities $ (1 ) $ 102 At December 31, 2017 and 2016, securities with a fair value of $9,090,302 and $9,279,000, respectively, were pledged as collateral for public deposits and for other borrowings with clients. Securities with unrealized losses aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, are as follows: Less Than Twelve Months More Than Twelve Months Gross Gross Unrealized Fair Unrealized Fair Losses Value Losses Value (in thousands) At December 31, 2017 Securities Available for Sale U.S. Government agency securities $ (8 ) $ 694 $ - $ - Municipal securities (36 ) 1,831 (59 ) 1,203 Mortgage-backed securities (308 ) 29,742 (142 ) 5,667 Total $ (352 ) $ 32,267 $ (201 ) $ 6,870 At December 31, 2016 Securities Available for Sale U.S. Government agency securities $ (17 ) $ 1,529 $ - $ - Municipal securities (282 ) 6,111 - - Mortgage-backed securities (191 ) 12,709 (9 ) 501 Total $ (490 ) $ 20,349 $ (9 ) $ 501 The unrealized losses on thirty-four and twenty-four securities at December 31, 2017 and 2016, respectively, were caused by market conditions. It is expected that the securities would not be settled at a price less than the par value of the investments. Because the decline in fair value is attributable to market conditions and not credit quality, and because the Company has the ability and intent to hold these investments until a market price recovery or maturity, these investments are not considered other-than-temporarily impaired.

Loans

Loans	12 Months Ended
	Dec. 31, 2017
Receivables [Abstract]
Loans	(3) Loans The segments and classes of loans are as follows: At December 31, (in thousands) 2017 2016 Real estate mortgage loans: Commercial $ 79,565 $ 65,805 Residential and home equity 94,824 88,883 Construction 26,813 19,991 Total real estate mortgage loans 201,202 174,679 Commercial loans 44,027 46,340 Consumer and other loans 7,742 4,275 Total loans 252,971 225,294 Add (Less): Net deferred loan costs 424 350 Allowance for loan losses (3,136 ) (2,876 ) Loans, net $ 250,259 $ 222,768 The Company has divided the loan portfolio into three portfolio segments and five portfolio classes, each with different risk characteristics and methodologies for assessing risk. All loans are underwritten based upon standards set forth in the policies approved by the Company’s Board of Directors. The portfolio segments and classes are identified by the Company as follows: Real Estate Mortgage Loans. Commercial. mixed-use Residential and Home Equity. one-to-four 1-year, 3-year, 5-year, 7-year 15-year 30-year Construction. Commercial Loans. Small-to-medium Consumer and Other Loans. An analysis of the change in the allowance for loan losses follows: Real Estate Mortgage Loans Residential Consumer and Home Commercial and Other (in thousands) Commercial Equity Construction Loans Loans Total Year Ended December 31, 2017 Beginning balance $ 775 $ 1,074 $ 258 $ 714 $ 55 $ 2,876 Provision (credit) for loan losses 119 23 73 (6 ) 47 256 Net (charge-offs) recoveries - - - 16 (12 ) 4 Ending balance $ 894 $ 1,097 $ 331 $ 724 $ 90 $ 3,136 At December 31, 2017 Individually evaluated for impairment: Recorded investment $ - $ - $ - $ 134 $ - $ 134 Balance in allowance for loan losses $ - $ - $ - $ 134 $ - $ 134 Collectively evaluated for impairment: Recorded investment $ 79,565 $ 94,824 $ 26,813 $ 43,893 $ 7,742 $ 252,837 Balance in allowance for loan losses $ 894 $ 1,097 $ 331 $ 590 $ 90 $ 3,002 Year Ended December 31, 2016 Beginning balance $ 707 $ 868 $ 246 $ 596 $ 56 $ 2,473 Provision (credit) for loan losses 68 206 12 135 3 424 Net (charge-offs) recoveries - - - (17 ) (4 ) (21 ) Ending balance $ 775 $ 1,074 $ 258 $ 714 $ 55 $ 2,876 At December 31, 2016 Individually evaluated for impairment: Recorded investment $ - $ 662 $ 73 $ 76 $ - $ 811 Balance in allowance for loan losses $ - $ - $ - $ 76 $ - $ 76 Collectively evaluated for impairment: Recorded investment $ 65,805 $ 88,221 $ 19,918 $ 46,264 $ 4,275 $ 224,483 Balance in allowance for loan losses $ 775 $ 1,074 $ 258 $ 638 $ 55 $ 2,800 The following summarizes the loan credit quality: Real Estate Mortgage Loans Residential Consumer and Home Commercial and Other (in thousands) Commercial Equity Construction Loans Loans Total At December 31, 2017 Grade: Pass $ 74,560 $ 92,282 $ 26,356 $ 42,874 $ 7,715 $ 243,787 Special mention 4,382 2,122 298 591 27 7,420 Substandard 623 420 159 562 - 1,764 Doubtful - - - - - - Loss - - - - - - Total $ 79,565 $ 94,824 $ 26,813 $ 44,027 $ 7,742 $ 252,971 At December 31, 2016 Grade: Pass $ 61,734 $ 84,695 $ 19,485 $ 45,623 $ 4,227 $ 215,764 Special mention 4,071 3,152 333 250 46 7,852 Substandard - 1,036 173 467 2 1,678 Doubtful - - - - - - Loss - - - - - - Total $ 65,805 $ 88,883 $ 19,991 $ 46,340 $ 4,275 $ 225,294 The Company categorizes loans into risk categories based on relevant information about the ability of borrowers to service their debt such as: current financial information, historical payment experience, credit documentation, public information, and current economic trends, among other factors. The Company analyzes loans individually by classifying the loans as to credit risk. Loans classified as substandard or special mention are reviewed quarterly by the Company for further deterioration or improvement to determine if they are appropriately classified and whether there is any impairment. All loans are graded upon initial issuance. Further, construction and nonowner-occupied commercial real estate loans and commercial relationships in excess of $500,000 are reviewed at least annually. The Company determines the appropriate loan grade during the renewal process and reevaluates the loan grade in situations when a loan becomes past due. Loans excluded from the review process above are generally classified as pass credits until: (a) they become past due; (b) management becomes aware of deterioration in the credit worthiness of the borrower; or (c) the client contacts the Company for a modification. In these circumstances, the loan is specifically evaluated for potential classification as to special mention, substandard or even charged-off. Pass Special Mention Substandard Doubtful Loss At December 31, 2017, there were two loans over sixty days past due and accruing, no loans past due ninety days or more but still accruing and two loans on nonaccrual. Age analysis of past-due Accruing Loans Greater Than 30-59 Days 60-89 Days 90 Days Total Past Nonaccrual Total (in thousands) Past Due Past Due Past Due Due Current Loans Loans At December 31, 2017: Real estate mortgage loans: Commercial $ - $ 623 $ - $ 623 $ 78,942 $ - $ 79,565 Residential and home equity - 255 - 255 94,569 - 94,824 Construction - - - - 26,813 - 26,813 Commercial loans - - - - 43,893 134 44,027 Consumer and other loans - - - - 7,742 - 7,742 Total $ - $ 878 $ - $ 878 $ 251,959 $ 134 $ 252,971 At December 31, 2016: Real estate mortgage loans: Commercial $ - $ - $ - $ - $ 65,805 $ - $ 65,805 Residential and home equity 371 - - 371 87,850 662 88,883 Construction - - - - 19,918 73 19,991 Commercial loans - - - - 46,264 76 46,340 Consumer and other loans - - - - 4,275 - 4,275 Total $ 371 $ - $ - $ 371 $ 224,112 $ 811 $ 225,294 The following summarizes the amount of impaired loans: With No Related Allowance Recorded With an Allowance Recorded Total Unpaid Unpaid Unpaid Contractual Contractual Contractual Recorded Principal Recorded Principal Related Recorded Principal Related (in thousands) Investment Balance Investment Balance Allowance Investment Balance Allowance At December 31, 2017: Commercial loans $ - $ - $ 134 $ 134 $ 134 $ 134 $ 134 $ 134 Total $ - $ - $ 134 $ 134 $ 134 $ 134 $ 134 $ 134 At December 31, 2016: Real estate mortgage loans: Residential and home equity $ 662 $ 662 $ - $ - $ - $ 662 $ 662 $ - Construction loans 73 73 - - - 73 73 - Commercial loans - - 76 76 76 76 76 76 Total $ 735 $ 735 $ 76 $ 76 $ 76 $ 811 $ 811 $ 76 The average net investment in impaired loans and interest income recognized and received on impaired loans by loan class is as follows: Average Interest Interest Recorded Income Income (in thousands) Investment Recognized Received Year Ended December 31, 2017 Residential & Home Equity $ 277 $ 28 $ 28 Construction 42 1 4 Commercial 64 - - Total $ 383 $ 29 $ 32 Year Ended December 31, 2016 Residential & Home Equity $ 354 $ - $ 14 Construction 19 - - Commercial 107 7 6 Total $ 480 $ 7 $ 20 There were no collateral dependent impaired loans measured at fair value on a nonrecurring basis at December 31, 2017 or 2016. The restructuring of a loan constitutes a troubled debt restructuring (“TDR”) if the creditor grants a concession to the debtor that it would not otherwise consider in the normal course of business. A concession may include an extension of repayment terms which would not normally be granted, a reduction in interest rate or the forgiveness of principal and/or accrued interest. All TDRs are evaluated individually for impairment on a quarterly basis as part of the allowance for loan losses calculation. The Company entered into a new troubled debt restructured loan during the year ended December 31, 2017. The troubled debt restricting entered into in 2017 did not subsequently default during that year. The Company did not enter into any new troubled debt restructurings during the year ended December 31, 2016. Year Ended December 31, 2017 Pre- Post- Current Modification Modification Modification Number Outstanding Outstanding Outstanding of Recorded Recorded Recorded Contracts Investment Investment Investment (in thousands) Troubled Debt Restructurings - Residential and home equity: Modified principal 1 $ 153 $ 169 $ 164 Total 1 $ 153 $ 169 $ 164 The Company grants the majority of its loans to borrowers throughout Leon County, Florida. Although the Company has a diversified loan portfolio, a significant portion of its borrowers’ ability to honor their contracts is dependent upon the economy of this area. The Company does not have any significant concentrations to any one industry or client.

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Premises and Equipment	(4) Premises and Equipment A summary of premises and equipment follows: At December 31, 2017 2016 (in thousands) Land $ 690 $ 690 Buildings 3,736 2,461 Leasehold improvements 416 411 Furniture, fixtures and equipment 1,160 993 Computer and software 2,140 1,943 Construction in progress - 1,181 Total, at cost 8,142 7,679 Less accumulated depreciation and amortization (3,270 ) (2,750 ) Premises and equipment, net $ 4,872 $ 4,929 Construction in progress relates to the construction of the Company’s branch office in Crawfordville, FL, which was substantially complete at December 31, 2016. The Company leases an office facility under an operating lease which expires in 2022, but has one 5-year (in thousands) Year Ending December 31, Amount 2018 $ 90 2019 90 2020 90 2021 90 2022 90 Total $ 450

Deposits

Deposits	12 Months Ended
	Dec. 31, 2017
Banking and Thrift [Abstract]
Deposits	(5) Deposits The aggregate amount of time deposits with a minimum denomination of $250,000 was approximately $10.7 million and $9.0 million at December 31, 2017 and 2016, respectively. A schedule of maturities of time deposits at December 31, 2017 follows: (in thousands) Year Ending December 31, Amount 2018 $ 16,942 2019 2,457 2020 538 2021 21 2022 2,096 Total $ 22,054

Other Borrowings

Other Borrowings	12 Months Ended
	Dec. 31, 2017
Text Block [Abstract]
Other Borrowings	(6) Other Borrowings The Company has pledged collateral to the Federal Home Loan Bank of Atlanta (“FHLB”) for future advances which will be collateralized by a blanket lien on qualifying residential real estate, commercial real estate, home equity lines of credit and multi-family loans. The Company may borrow up to $41.7 million as of December 31, 2017 from the FHLB. There were no advances outstanding at December 31, 2017 or 2016. The Company also has available credit of $16.3 million in lines of credit with correspondent banks. All draws under these lines are subject to approval by the correspondent bank.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	(7) Income Taxes The components of the income taxes are as follows: Year Ended December 31, (in thousands) 2017 2016 Current: Federal $ 1,309 $ 1,031 State 224 180 Total current 1,533 1,211 Deferred: Federal 193 1 State 9 5 Total deferred 202 6 Total income taxes $ 1,735 $ 1,217 The reasons for the difference between the statutory Federal income tax rate of 34% and the effective tax rates are summarized as follows: Year Ended December 31, 2017 2016 % of % of Pretax Pretax Amount Earnings Amount Earnings (dollars in thousands) Income taxes at statutory rate $ 1,548 34.0 % $ 1,169 34.0 % Increase (decrease) resulting from: State taxes, net of federal tax benefit 154 3.4 122 3.5 Tax-exempt (97) (2.1) (82) (2.4) Stock-based compensation (60) (1.3) - - Change in federal rate 155 3.4 - - Other nondeductible expenses 35 0.7 8 0.3 Total $ 1,735 38.1 % $ 1,217 35.4 % Tax effects of temporary differences that give rise to the deferred tax assets and liabilities are as follows: At December 31, 2017 2016 (in thousands) Deferred tax assets: Allowance for loan losses $ 744 $ 1,008 Organizational and start-up costs 49 87 Stock-based compensation 12 18 Unrealized losses on securities available for sale 100 137 Other 23 16 Deferred tax assets 928 1,266 Deferred tax liabilities: Prepaid Expenses (70 ) (69 ) Deferred loan costs (317 ) (392 ) Premises and equipment (202 ) (272 ) Deferred tax liabilities (589 ) (733 ) Net deferred tax asset $ 339 $ 533 The Company files consolidated income tax returns in the U.S. federal jurisdiction and the State of Florida. The Company is no longer subject to U.S. federal, or state and local income tax examinations by taxing authorities for years before 2014. On December 22, 2017, the Tax Cuts and Jobs Act (the “Act”) was enacted. The Act, among other provisions, reduced the corporate tax rate from 35% to 21%. As a result, the Company recorded additional tax expense of $155,000 to measure the net Deferred Tax Asset at the new enacted tax rate. An election was also made to reclassify the income tax effects of the Tax Cuts and Jobs Act from accumulated other comprehensive loss to retained earnings.

Off-Balance Sheet Financial Ins

Off-Balance Sheet Financial Instruments	12 Months Ended
	Dec. 31, 2017
Text Block [Abstract]
Off-Balance Sheet Financial Instruments	(8) Off-Balance The Company is a party to financial instruments with off-balance The Company’s exposure to credit loss in the event of nonperformance by the other party to the financial instrument for available lines of credit, construction loans in process and standby letters of credit is represented by the contractual amount of those instruments. The Company uses the same credit policies in making commitments as it does for on-balance Commitments to extend credit, construction loans in process and unused lines of credit are agreements to lend to a client 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 some of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Company evaluates each client’s credit worthiness on a case-by-case Guaranteed accounts are irrevocable standby letters of credit issued by us to guarantee a client’s credit line with our third-party credit card company, First Arkansas Bank & Trust. As a part of this agreement, we are responsible for the established credit limit on certain accounts plus 10%. The maximum potential amount of future payments we could be required to make is represented by the dollar amount disclosed in the table below. Standby letters of credit and commitments to extend credit typically result in loans with a market interest rate when funded. In 2016, the Company entered into an agreement with another bank. This agreement references an interest rate swap that was transacted between the other bank and its loan client (the “Counterparty”). Should the Counterparty default on its obligations under the interest rate swap agreement with the other bank, then the Company would be liable for 13.208% of all swap liabilities. The maximum potential credit exposure under this contract at December 31, 2017 is $45,000. A summary of the contractual amounts of the Company’s financial instruments with off-balance At December 31, 2017 (in thousands) Commitments to extend credit $ 1,108 Construction loans in process $ 15,681 Unused lines of credit $ 37,959 Standby financial letters of credit $ 1,812 Standby performance letters of credit $ 104 Guaranteed accounts $ 1,220

Stock Compensation Plans

Stock Compensation Plans	12 Months Ended
	Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Compensation Plans	(9) Stock Compensation Plans The 2015 Stock Incentive Compensation Plan (the “2015 Plan”) was approved by Shareholders at the Company’s annual meeting of shareholders on May 20, 2015, and permits the Company to grants its key employees and directors stock options, stock appreciation rights, performance shares, and phantom stock. Under the 2015 Plan, the number of shares which may be issued is 500,000, but in no instance more than 15% of the issued and outstanding shares of the Company’s common stock. As of December 31, 2017, 11,540 stock options have been granted under the 2015 plan. At December 31, 2017, 456,307 options are available for grant. A summary of the activity in the Company’s 2015 Plan is as follows: Weighted- Weighted- Average Average Remaining Aggregate Number of Exercise Contractual Intrinsic Options Price Term Value Outstanding at December 31, 2016 - - Options granted 11,540 $ 17.03 Outstanding at December 31, 2017 11,540 $ 17.03 4.1 years $ 16,000 Exercisable at December 31, 2017 11,540 $ 17.03 4.1 years $ 16,000 The fair value of shares vested and recognized as compensation expense was $15,000 for the year ended December 31, 2017. There was no share-based compensation expense during the year ended December 31, 2016. At December 31, 2017, there was no unrecognized compensation expense related to non-vested The fair value of each option granted during the year ended December 31, 2017 was estimated on the date of grant using the Black-Scholes option-pricing model with the following assumptions: Weighted average risk-free interest rate 1.48 % Expected dividend yield 0.40 % Expected stock volatility 8.54 % Expected life in years 3.00 Per share fair value of options issued during period $ 1.26 The Company used the guidance in Staff Accounting Bulletin No. 107 to determine the estimated life of options issued. Expected volatility is based on volatility of similar companies’ common stock. The risk-free rate for periods within the contractual life of the option is based on the U.S. Treasury yield curve in effect at the time of grant. The dividend yield is based on the Company’s history and expectation of dividend payouts. As of May 20, 2015, no further grants will be made under the 2007 Stock Option Plan (the “2007 Plan”). Unexercised stock options that were granted under the 2007 Plan will remain outstanding and will expire under the terms of the individual stock grant. A summary of the activity in the Company’s 2007 Plan is as follows: Weighted- Weighted- Average Average Remaining Aggregate Number of Exercise Contractual Intrinsic Options Price Term Value Outstanding at December 31, 2015 75,500 $ 10.19 Options exercised (25,450) 10.29 Options forfeited (7,850) 10.00 Outstanding at December 31, 2016 42,200 $ 10.16 Options exercised (19,450) 10.00 Options forfeited (550) 10.00 Outstanding at December 31, 2017 22,200 $ 10.31 1.7 years $ 180,000 Exercisable at December 31, 2017 21,700 $ 10.30 1.7 years $ 176,000 At December 31, 2017, there was no unrecognized compensation expense related to non-vested, In 2012, the Company’s Board of Directors and shareholders adopted the Directors’ Plan. The Directors’ Plan permits the Company’s and the Bank’s directors to elect to receive any compensation to be paid to them in shares of the Company’s common stock. Pursuant to the Directors’ Plan, each director is permitted to make an election to receive shares of stock instead of cash. To encourage directors to elect to receive stock, the Directors’ Plan provides that if a director elects to receive stock, he or she will receive in common stock 110% of the amount of cash fees set by the Board or the Compensation and Nominating Committee. The value of stock to be awarded pursuant to the Directors’ Plan will be the closing price of a share of common stock as traded on the Over-the-

Profit Sharing Plan

Profit Sharing Plan	12 Months Ended
	Dec. 31, 2017
Postemployment Benefits [Abstract]
Profit Sharing Plan	(10) Profit Sharing Plan The Company sponsors a 401(k)-profit sharing plan available to all employees electing to participate after meeting certain length-of-service

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2017
Related Party Transactions [Abstract]
Related Party Transactions	(11) Related Party Transactions The Company enters into transactions during the ordinary course of business with officers and directors of the Company and entities in which they hold a significant financial interest. The following table summarizes these transactions: Year Ended December 31, (in thousands) 2017 2016 Loans: Beginning balance $ 5,942 $ 6,082 Originated during the year 634 1,216 Principal repayments (706) (1,356) Ending balance $ 5,870 $ 5,942 Deposits at year-end $ 10,008 $ 13,947 From the Bank’s formation until February, 2016, the Company leased an office facility from a related party. In February, 2016, the building was purchased by a non-related

Fair Value of Financial Instrum

Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	(12) Fair Value of Financial Instruments The approximate carrying amounts and estimated fair values of the Company’s financial instruments are as follows: At December 31, 2017 At December 31, 2016 Carrying Fair Carrying Fair (in thousands) Level Amount Value Amount Value Financial assets: Cash and cash equivalents 1 $ 32,397 $ 32,397 $ 36,165 $ 36,165 Securities available for sale 2 49,809 49,809 33,103 33,103 Loans held for sale 3 5,880 6,039 3,291 3,500 Loans, net 3 250,259 249,628 222,768 221,320 Federal Home Loan Bank stock 3 316 316 220 220 Accrued interest receivable 3 978 978 798 798 Financial liabilities- Deposits 3 298,297 298,403 275,347 275,433 Off-Balance 3 - - - -

Dividend Restrictions

Dividend Restrictions	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Dividend Restrictions	(13) Dividend Restrictions The Holding Company is limited in the amount of cash dividends it may declare and pay by the amount of capital is has retained and the amount of dividends it can receive from the Bank. The Bank is limited in the amount of cash dividends that may be paid. The amount of cash dividends that may be paid is based on the Bank’s net earnings of the current year combined with the Bank’s retained earnings of the preceding two years, as defined by state banking regulations. However, for any dividend declaration, the Bank must consider additional factors such as the amount of current period net earnings, liquidity, asset quality, capital adequacy and economic conditions. It is likely that these factors would further limit the amount of dividends which the Bank could declare. In addition, bank regulators have the authority to prohibit banks from paying dividends if they deem such payment to be an unsafe or unsound practice.

Regulatory Matters

Regulatory Matters	12 Months Ended
	Dec. 31, 2017
Banking and Thrift [Abstract]
Regulatory Matters	(14) Regulatory Matters The Bank is subject to various regulatory capital requirements administered by the 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 and the Bank’s financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Bank must meet specific capital guidelines that involve quantitative measures of the Bank’s assets, liabilities, and certain off-balance-sheet The Bank is subject to the Basel III capital level threshold requirements under the Prompt Corrective Action regulations which phase in full compliance over a multi-year schedule. These regulations were designed to ensure that banks maintain strong capital positions even in the event of severe economic downturns or unforeseen losses. Changes that could affect the Bank going forward include additional constraints on the inclusion of deferred tax assets in capital and increased risk weightings for nonperforming loans and acquisition/development loans in regulatory capital. In the first quarter of 2015, the Bank elected an irreversible one-time opt-out st Quantitative measures established by regulation to ensure capital adequacy require the Bank to maintain minimum amounts and percentage (set forth in the table below) of total and Tier 1 capital (as defined in the regulations) to risk-weighted assets (as defined), and of Tier 1 capital (as defined) to average assets (as defined). Management believes, as of December 31, 2017, that the Bank meets all capital adequacy requirements to which it is subject. As of December 31, 2017, the Bank is well capitalized under the regulatory framework for prompt corrective action. To be categorized as adequately capitalized, the Bank must maintain minimum total risk-based, Tier 1 risk-based, and Tier 1 leverage percentages as set forth in the table. There are no conditions or events since that notification that management believes have changed the Bank’s category. The Bank’s actual capital amounts and percentages are also presented in the table: Actual For Capital Adequacy For Well Capitalized (dollars in thousands) Amount Percentage Amount Percentage Amount Percentage As of December 31, 2017 Tier 1 Leverage ratio to Average Assets $ 33,146 9.48 % $ 13,983 4.00 % $ 17,479 5.00 % Common Equity Tier 1 Capital to Risk-Weighted Assets 33,146 12.80 11,654 4.50 16,834 6.50 Tier 1 Capital to Risk-Weighted Assets 33,146 12.80 15,539 6.00 20,718 8.00 Total Capital to Risk-Weighted Assets 36,282 14.01 20,718 8.00 25,898 10.00 As of December 31, 2016: Tier 1 Leverage ratio to Average Assets $ 25,994 8.73 % $ 11,906 4.00 % $ 14,883 5.00 % Common Equity Tier 1 Capital to Risk-Weighted Assets 25,994 11.70 9,995 4.50 14,437 6.50 Tier 1 Capital to Risk-Weighted Assets 25,994 11.70 13,326 6.00 17,769 8.00 Total Capital to Risk-Weighted Assets 28,772 12.95 17,769 8.00 22,211 10.00

Legal Contingencies

Legal Contingencies	12 Months Ended
	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Legal Contingencies	(15) Legal Contingencies Various legal claims arise from time to time in the normal course of business which, in the opinion of management, will not have a material effect on the Company’s financial statements. As of December 31, 2017, there is no pending or threatened litigation of which management is aware.

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2017
Earnings Per Share [Abstract]
Earnings Per Share	(16) Earnings Per Share Earnings per share (“EPS”) has been computed on the basis of the weighted-average number of shares of common stock outstanding. Outstanding stock options are considered dilutive securities for purposes of calculating diluted EPS which was computed using the treasury stock method: 2017 2016 Weighted- Per Weighted- Per Average Share Average Share (dollars in thousands, except per share amounts) Earnings Shares Amount Earnings Shares Amount Year Ended December 31, Basic EPS: Net earnings $ 2,817 2,704,382 $ 1.04 $ 2,220 1,982,334 $ 1.12 Effect of dilutive securities-incremental shares from assumed conversion of options 7,317 8,827 Diluted EPS: Net earnings $ 2,817 2,711,699 $ 1.04 $ 2,220 1,991,161 $ 1.11

Parent Company Only Financial I

Parent Company Only Financial Information	12 Months Ended
	Dec. 31, 2017
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Parent Company Only Financial Information	(17) Parent Company Only Financial Information The Holding Company’s unconsolidated financial information follows: At December 31, (in thousands) 2017 2016 Assets Cash $ 14,103 $ 1,301 Investment in subsidiary 32,850 25,761 Other assets 20 20 Total assets $ 46,973 $ 27,082 Stockholders’ Equity Stockholders’ equity $ 46,973 $ 27,082 Total liabilities and stockholders’ equity $ 46,973 $ 27,082 Condensed Statements of Earnings Year Ended December 31, (in thousands) 2017 2016 Revenues $ - $ - Expenses (440) (421) Income tax benefit 165 159 Loss before earnings of subsidiary (275) (262) Net earnings of subsidiary 3,092 2,482 Net earnings $ 2,817 $ 2,220 Condensed Statements of Cash Flows Year Ended December 31, (in thousands) 2017 2016 Cash flows from operating activities: Net Earnings $ 2,817 $ 2,220 Adjustments to reconcile net earnings to net cash used in operating activities: Equity in earnings of subsidiary (3,092) (2,482) Stock issued as compensation 65 55 Net decrease in other assets - 207 Net cash used in operating activities (210) - Cash flows from financing activities: Proceeds from sale of common stock 16,957 - Proceeds from stock options exercised 195 261 Net cash provided by financing activities 17,152 261 Cash flows from investment activities: Cash dividend paid (140) (99) Cash infusion to subsidiary (4,000) - Net cash used by investing activities (4,140) (99) Net increase in cash 12,802 162 Cash at beginning of the year 1,301 1,139 Cash at end of year $ 14,103 $ 1,301 Supplemental disclosure of cash flow information- Noncash items: Net change in accumulated other comprehensive loss of subsidiary, net of change in unrealized loss on securities available for sale, net of tax $ (18) $ (289) Stock-based compensation expense of subsidiary $ 15 $ 1

Summary of Significant Accoun26

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Organization	Organization. The following is a description of the significant accounting policies and practices followed by the Company, which conform to accounting principles generally accepted in the United States of America (“GAAP”) and prevailing practices within the banking industry.
Use of Estimates	Use of Estimates.
Principles of Consolidation	Principles of Consolidation.
Cash and Cash Equivalents	Cash and Cash Equivalents. At December 31, 2017 and 2016, the Company was required by law or regulation to maintain cash reserves with the Federal Reserve Bank, in noninterest-bearing accounts with other banks or in the vault in the amounts of $2,618,000 and $1,799,000 respectively.
Securities	Securities. held-to-maturity available-for-sale. Held-to-maturity Available-for-sale held-to-maturity available-for-sale available-for-sale specific-identification Management evaluates securities for other-than-temporary impairment at least on a quarterly basis, and more frequently when economic or market concerns warrant such evaluation. Consideration is given to (1) the length of time and the extent to which the fair value has been less than cost, (2) the financial condition and near-term prospects of the issuer, and (3) the intent and ability of the Company to retain its investment in the issuer for a period of time sufficient to allow for any anticipated recovery in fair value.
Loans Held for Sale	Loans Held for Sale.
Loans	Loans. pay-off charge-offs, Commitment and loan origination fees are deferred and certain direct origination costs are capitalized. Both are recognized as an adjustment of the yield of the related loan. The accrual of interest on all portfolio classes is discontinued at the time the loan is ninety-days delinquent unless the loan is well collateralized and in the process of collection. In all cases, loans are placed on nonaccrual or charged off at an earlier date if collection of principal or interest is considered doubtful. All interest accrued but not collected for loans that are placed on nonaccrual or loans that are charged off is reversed against interest income. The interest on these loans is accounted for on the cash-basis or cost-recovery method, until qualifying for return to accrual. Loans are returned to accrual status when all of the principal and interest amounts contractually due are brought current and future payments are reasonably assured.
Allowance for Loan Losses	Allowance for Loan Losses. The allowance for loan losses is evaluated on a regular basis by management and is based upon management’s periodic review of the collectability of the loans in light of historical experience, the nature and volume of the loan portfolio, adverse situations that may affect the borrower’s ability to repay, estimated value of any underlying collateral and prevailing economic conditions. This evaluation is inherently subjective as it requires estimates that are susceptible to significant revision as more information becomes available. The allowance consists of specific and general components. The specific component relates to loans that are considered impaired. For such loans, an allowance is established when the discounted cash flows or collateral value of the impaired loan is lower than the carrying value of that loan. The general component covers all other loans and is based on the following factors. The historical loss component of the allowance is determined by losses recognized by portfolio segment over the preceding thirty-six Allowance for Loan Losses, Continued. case-by-case loan-by-loan
Premises and Equipment	Premises and Equipment.
Transfer of Financial Assets	Transfer of Financial Assets.
Off-Balance-Sheet Financial Instruments	Off-Balance off-balance-sheet
Income Taxes	Income Taxes. Deferred tax assets are recognized if it is more likely than not, based on the technical merits, that the tax position will be realized or sustained upon examination. The term “more likely than not” means a likelihood of more than 50 percent; the terms examined and upon examination also include resolution of the related appeals or litigation processes, if any. Income Taxes, Continued. more-likely-than-not more-likely-than-not The Company recognizes interest and penalties on income taxes as a component of income tax expense. The Company files consolidated income tax returns. Income taxes are allocated to the Holding Company and Bank as if separate income tax returns were filed.
Fair Value Measurements	Fair Value Measurements. Level 1: Observable inputs such as quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2: Inputs other than quoted prices that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities that are not active; and model-driven valuations whose inputs are observable or whose significant value drivers are observable. Valuations may be obtained from, or corroborated by, third-party pricing services. Level 3: Unobservable inputs to measure fair value of assets and liabilities for which there is little, if any market activity at the measurement date, using reasonable inputs and assumptions based upon the best information at the time, to the extent that inputs are available without undue cost and effort. The following describes valuation methodologies used for assets measured at fair value:
Securities Available for Sale	Securities Available for Sale.
Impaired Loans	Impaired Loans.
Fair Values of Financial Instruments	Fair Values of Financial Instruments. Cash and Cash Equivalents. Securities. Loans Held for Sale. Loans. one-to-four Federal Home Loan Bank Stock. Accrued Interest Receivable. Deposits. Off-Balance off-balance
Advertising	Advertising.
Stock Option Compensation	Stock-Based Compensation.
Comprehensive Income	Comprehensive Income. available-for-sale
Mortgage Banking Revenue	Mortgage Banking Revenue.
Recent Accounting Standards Update	Recent Accounting Standards Update. No. 2016-01, Financial Instruments-Overall (Subtopic 825-10): available-for-sale In February 2016, the FASB issued ASU No. 2016-2, Leases (Topic 842) In March 2016, the FASB issued ASU No. 2016-09, Compensation-Stock Compensation (Topic 718) In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326) available-for-sale Recent Accounting Standards Update, Continued. ASU No. 2017-01, Business In March 2017, the FASB issued ASU No. 2017-08, In February 2018, the FASB issued ASU No. 2018-0 2 Income Statement Reporting Comprehensive Income (Topic 220)

Securities Available for Sale (

Securities Available for Sale (Tables)	12 Months Ended
	Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Summary of Carrying Amount and Fair Values of Securities	Securities have been classified according to management’s intention. The carrying amount of securities and their fair values are summarized as follows: Gross Gross Amortized Unrealized Unrealized Fair Cost Gains Losses Value (in thousands) At December 31, 2017 U.S. Government agency securities $ 1,251 $ 6 $ (8) $ 1,249 Municipal securities 12,340 128 (95) 12,373 Mortgage-backed securities 36,614 23 (450) 36,187 Total $ 50,205 $ 157 $ (553) $ 49,809 At December 31, 2016 U.S. Government agency securities $ 2,186 $ 2 $ (17) $ 2,171 Municipal securities 12,614 91 (282) 12,423 Mortgage-backed securities 18,673 36 (200) 18,509 Total $ 33,473 $ 129 $ (499) $ 33,103
Securities Available for Sale Measured at Fair Value on Recurring Basis	Securities available for sale measured at fair value on a recurring basis are summarized below: Fair Value Measurements Using Quoted Prices In Active Significant Markets for Other Significant Identical Observable Unobservable Fair Assets Inputs Inputs Value (Level 1) (Level 2) (Level 3) (in thousands) At December 31, 2017 U.S. Government agency securities $ 1,249 $ - $ 1,249 $ - Municipal securities 12,373 - 12,373 - Mortgage-backed securities 36,187 - 36,187 - Total $ 49,809 $ - $ 49,809 $ - At December 31, 2016 U.S. Government agency securities $ 2,171 $ - $ 2,171 $ - Municipal securities 12,423 - 12,423 - Mortgage-backed securities 18,509 - 18,509 - Total $ 33,103 $ - $ 33,103 $ -
Scheduled Maturities of Securities with Fair Value and Amortized Cost	The scheduled maturities of securities are as follows: Amortized Fair Cost Value (in thousands) At December 31, 2017 Due in less than one year $ 511 $ 511 Due in one to five years 2,452 2,417 Due in five to ten years 7,863 7,951 Due after ten years 2,765 2,743 Mortgage-backed securities 36,614 36,187 Total $ 50,205 $ 49,809
Schedule of Sale of Securities Available for Sale	The following summarizes sales of securities available for sale: Year Ended December 31, (in thousands) 2017 2016 Proceeds from sale of securities $ 750 $ 8,248 Gross gains - 102 Gross losses (1 ) - Net (loss) gain on sale of securities $ (1 ) $ 102
Summary of Securities in Continuous Unrealized Loss Position	Securities with unrealized losses aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, are as follows: Less Than Twelve Months More Than Twelve Months Gross Gross Unrealized Fair Unrealized Fair Losses Value Losses Value (in thousands) At December 31, 2017 Securities Available for Sale U.S. Government agency securities $ (8 ) $ 694 $ - $ - Municipal securities (36 ) 1,831 (59 ) 1,203 Mortgage-backed securities (308 ) 29,742 (142 ) 5,667 Total $ (352 ) $ 32,267 $ (201 ) $ 6,870 At December 31, 2016 Securities Available for Sale U.S. Government agency securities $ (17 ) $ 1,529 $ - $ - Municipal securities (282 ) 6,111 - - Mortgage-backed securities (191 ) 12,709 (9 ) 501 Total $ (490 ) $ 20,349 $ (9 ) $ 501

Loans (Tables)

Loans (Tables)	12 Months Ended
	Dec. 31, 2017
Receivables [Abstract]
Segments and Classes of Loans	The segments and classes of loans are as follows: At December 31, (in thousands) 2017 2016 Real estate mortgage loans: Commercial $ 79,565 $ 65,805 Residential and home equity 94,824 88,883 Construction 26,813 19,991 Total real estate mortgage loans 201,202 174,679 Commercial loans 44,027 46,340 Consumer and other loans 7,742 4,275 Total loans 252,971 225,294 Add (Less): Net deferred loan costs 424 350 Allowance for loan losses (3,136 ) (2,876 ) Loans, net $ 250,259 $ 222,768
Summary of Changes in Allowance for Loan Losses	An analysis of the change in the allowance for loan losses follows: Real Estate Mortgage Loans Residential Consumer and Home Commercial and Other (in thousands) Commercial Equity Construction Loans Loans Total Year Ended December 31, 2017 Beginning balance $ 775 $ 1,074 $ 258 $ 714 $ 55 $ 2,876 Provision (credit) for loan losses 119 23 73 (6 ) 47 256 Net (charge-offs) recoveries - - - 16 (12 ) 4 Ending balance $ 894 $ 1,097 $ 331 $ 724 $ 90 $ 3,136 At December 31, 2017 Individually evaluated for impairment: Recorded investment $ - $ - $ - $ 134 $ - $ 134 Balance in allowance for loan losses $ - $ - $ - $ 134 $ - $ 134 Collectively evaluated for impairment: Recorded investment $ 79,565 $ 94,824 $ 26,813 $ 43,893 $ 7,742 $ 252,837 Balance in allowance for loan losses $ 894 $ 1,097 $ 331 $ 590 $ 90 $ 3,002 Year Ended December 31, 2016 Beginning balance $ 707 $ 868 $ 246 $ 596 $ 56 $ 2,473 Provision (credit) for loan losses 68 206 12 135 3 424 Net (charge-offs) recoveries - - - (17 ) (4 ) (21 ) Ending balance $ 775 $ 1,074 $ 258 $ 714 $ 55 $ 2,876 At December 31, 2016 Individually evaluated for impairment: Recorded investment $ - $ 662 $ 73 $ 76 $ - $ 811 Balance in allowance for loan losses $ - $ - $ - $ 76 $ - $ 76 Collectively evaluated for impairment: Recorded investment $ 65,805 $ 88,221 $ 19,918 $ 46,264 $ 4,275 $ 224,483 Balance in allowance for loan losses $ 775 $ 1,074 $ 258 $ 638 $ 55 $ 2,800
Summary of Loan Credit Quality	The following summarizes the loan credit quality: Real Estate Mortgage Loans Residential Consumer and Home Commercial and Other (in thousands) Commercial Equity Construction Loans Loans Total At December 31, 2017 Grade: Pass $ 74,560 $ 92,282 $ 26,356 $ 42,874 $ 7,715 $ 243,787 Special mention 4,382 2,122 298 591 27 7,420 Substandard 623 420 159 562 - 1,764 Doubtful - - - - - - Loss - - - - - - Total $ 79,565 $ 94,824 $ 26,813 $ 44,027 $ 7,742 $ 252,971 At December 31, 2016 Grade: Pass $ 61,734 $ 84,695 $ 19,485 $ 45,623 $ 4,227 $ 215,764 Special mention 4,071 3,152 333 250 46 7,852 Substandard - 1,036 173 467 2 1,678 Doubtful - - - - - - Loss - - - - - - Total $ 65,805 $ 88,883 $ 19,991 $ 46,340 $ 4,275 $ 225,294
Summary of Past Due Loans	Age analysis of past-due Accruing Loans Greater Than 30-59 Days 60-89 Days 90 Days Total Past Nonaccrual Total (in thousands) Past Due Past Due Past Due Due Current Loans Loans At December 31, 2017: Real estate mortgage loans: Commercial $ - $ 623 $ - $ 623 $ 78,942 $ - $ 79,565 Residential and home equity - 255 - 255 94,569 - 94,824 Construction - - - - 26,813 - 26,813 Commercial loans - - - - 43,893 134 44,027 Consumer and other loans - - - - 7,742 - 7,742 Total $ - $ 878 $ - $ 878 $ 251,959 $ 134 $ 252,971 At December 31, 2016: Real estate mortgage loans: Commercial $ - $ - $ - $ - $ 65,805 $ - $ 65,805 Residential and home equity 371 - - 371 87,850 662 88,883 Construction - - - - 19,918 73 19,991 Commercial loans - - - - 46,264 76 46,340 Consumer and other loans - - - - 4,275 - 4,275 Total $ 371 $ - $ - $ 371 $ 224,112 $ 811 $ 225,294
Summary of Impaired Loans	The following summarizes the amount of impaired loans: With No Related Allowance Recorded With an Allowance Recorded Total Unpaid Unpaid Unpaid Contractual Contractual Contractual Recorded Principal Recorded Principal Related Recorded Principal Related (in thousands) Investment Balance Investment Balance Allowance Investment Balance Allowance At December 31, 2017: Commercial loans $ - $ - $ 134 $ 134 $ 134 $ 134 $ 134 $ 134 Total $ - $ - $ 134 $ 134 $ 134 $ 134 $ 134 $ 134 At December 31, 2016: Real estate mortgage loans: Residential and home equity $ 662 $ 662 $ - $ - $ - $ 662 $ 662 $ - Construction loans 73 73 - - - 73 73 - Commercial loans - - 76 76 76 76 76 76 Total $ 735 $ 735 $ 76 $ 76 $ 76 $ 811 $ 811 $ 76
Summary of Average Net Investment in Impaired Loans and Interest Income Recognized and Received on Impaired Loans	The average net investment in impaired loans and interest income recognized and received on impaired loans by loan class is as follows: Average Interest Interest Recorded Income Income (in thousands) Investment Recognized Received Year Ended December 31, 2017 Residential & Home Equity $ 277 $ 28 $ 28 Construction 42 1 4 Commercial 64 - - Total $ 383 $ 29 $ 32 Year Ended December 31, 2016 Residential & Home Equity $ 354 $ - $ 14 Construction 19 - - Commercial 107 7 6 Total $ 480 $ 7 $ 20
Summary of Loans Determined to be Troubled Debt Restructurings	The Company did not enter into any new troubled debt restructurings during the year ended December 31, 2016. Year Ended December 31, 2017 Pre- Post- Current Modification Modification Modification Number Outstanding Outstanding Outstanding of Recorded Recorded Recorded Contracts Investment Investment Investment (in thousands) Troubled Debt Restructurings - Residential and home equity: Modified principal 1 $ 153 $ 169 $ 164 Total 1 $ 153 $ 169 $ 164

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Summary of Premises and Equipment	A summary of premises and equipment follows: At December 31, 2017 2016 (in thousands) Land $ 690 $ 690 Buildings 3,736 2,461 Leasehold improvements 416 411 Furniture, fixtures and equipment 1,160 993 Computer and software 2,140 1,943 Construction in progress - 1,181 Total, at cost 8,142 7,679 Less accumulated depreciation and amortization (3,270 ) (2,750 ) Premises and equipment, net $ 4,872 $ 4,929
Schedule of Future Minimum Rental Commitments	Future minimum rental commitments, including renewal options, under the current operating lease are indicated in the following table. (in thousands) Year Ending December 31, Amount 2018 $ 90 2019 90 2020 90 2021 90 2022 90 Total $ 450

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2017
Banking and Thrift [Abstract]
Schedule of Maturities of Time Deposits	A schedule of maturities of time deposits at December 31, 2017 follows: (in thousands) Year Ending December 31, Amount 2018 $ 16,942 2019 2,457 2020 538 2021 21 2022 2,096 Total $ 22,054

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Components of Income Taxes	The components of the income taxes are as follows: Year Ended December 31, (in thousands) 2017 2016 Current: Federal $ 1,309 $ 1,031 State 224 180 Total current 1,533 1,211 Deferred: Federal 193 1 State 9 5 Total deferred 202 6 Total income taxes $ 1,735 $ 1,217
Reconciliation of statutory Federal Income Tax Rate and Effective Tax Rates	The reasons for the difference between the statutory Federal income tax rate of 34% and the effective tax rates are summarized as follows: Year Ended December 31, 2017 2016 % of % of Pretax Pretax Amount Earnings Amount Earnings (dollars in thousands) Income taxes at statutory rate $ 1,548 34.0 % $ 1,169 34.0 % Increase (decrease) resulting from: State taxes, net of federal tax benefit 154 3.4 122 3.5 Tax-exempt (97) (2.1) (82) (2.4) Stock-based compensation (60) (1.3) - - Change in federal rate 155 3.4 - - Other nondeductible expenses 35 0.7 8 0.3 Total $ 1,735 38.1 % $ 1,217 35.4 %
Summary of Tax Effects of Temporary Differences on Deferred Tax Assets and Liabilities	Tax effects of temporary differences that give rise to the deferred tax assets and liabilities are as follows: At December 31, 2017 2016 (in thousands) Deferred tax assets: Allowance for loan losses $ 744 $ 1,008 Organizational and start-up costs 49 87 Stock-based compensation 12 18 Unrealized losses on securities available for sale 100 137 Other 23 16 Deferred tax assets 928 1,266 Deferred tax liabilities: Prepaid Expenses (70 ) (69 ) Deferred loan costs (317 ) (392 ) Premises and equipment (202 ) (272 ) Deferred tax liabilities (589 ) (733 ) Net deferred tax asset $ 339 $ 533

Off-Balance Sheet Financial I32

Off-Balance Sheet Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2017
Text Block [Abstract]
Summary of Contractual Amounts of Financial Instruments	A summary of the contractual amounts of the Company’s financial instruments with off-balance At December 31, 2017 (in thousands) Commitments to extend credit $ 1,108 Construction loans in process $ 15,681 Unused lines of credit $ 37,959 Standby financial letters of credit $ 1,812 Standby performance letters of credit $ 104 Guaranteed accounts $ 1,220

Stock Compensation Plans (Table

Stock Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2017
Black-Scholes Option-Pricing Model Assumptions	The fair value of each option granted during the year ended December 31, 2017 was estimated on the date of grant using the Black-Scholes option-pricing model with the following assumptions: Weighted average risk-free interest rate 1.48 % Expected dividend yield 0.40 % Expected stock volatility 8.54 % Expected life in years 3.00 Per share fair value of options issued during period $ 1.26
2007 Incentive Award Plan [Member]
Summary of Company's Plan	A summary of the activity in the Company’s 2007 Plan is as follows: Weighted- Weighted- Average Average Remaining Aggregate Number of Exercise Contractual Intrinsic Options Price Term Value Outstanding at December 31, 2015 75,500 $ 10.19 Options exercised (25,450) 10.29 Options forfeited (7,850) 10.00 Outstanding at December 31, 2016 42,200 $ 10.16 Options exercised (19,450) 10.00 Options forfeited (550) 10.00 Outstanding at December 31, 2017 22,200 $ 10.31 1.7 years $ 180,000 Exercisable at December 31, 2017 21,700 $ 10.30 1.7 years $ 176,000
2015 Stock Incentive Compensation Plan [Member]
Summary of Company's Plan	A summary of the activity in the Company’s 2015 Plan is as follows: Weighted- Weighted- Average Average Remaining Aggregate Number of Exercise Contractual Intrinsic Options Price Term Value Outstanding at December 31, 2016 - - Options granted 11,540 $ 17.03 Outstanding at December 31, 2017 11,540 $ 17.03 4.1 years $ 16,000 Exercisable at December 31, 2017 11,540 $ 17.03 4.1 years $ 16,000

Related Party Transactions (Tab

Related Party Transactions (Tables)	12 Months Ended
	Dec. 31, 2017
Related Party Transactions [Abstract]
Summary of Activity of Loans to Related Parties	The Company enters into transactions during the ordinary course of business with officers and directors of the Company and entities in which they hold a significant financial interest. The following table summarizes these transactions: Year Ended December 31, (in thousands) 2017 2016 Loans: Beginning balance $ 5,942 $ 6,082 Originated during the year 634 1,216 Principal repayments (706) (1,356) Ending balance $ 5,870 $ 5,942 Deposits at year-end $ 10,008 $ 13,947

Fair Value of Financial Instr35

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Schedule of Carrying Amounts and Estimated Fair Values of Financial Instruments	The approximate carrying amounts and estimated fair values of the Company’s financial instruments are as follows: At December 31, 2017 At December 31, 2016 Carrying Fair Carrying Fair (in thousands) Level Amount Value Amount Value Financial assets: Cash and cash equivalents 1 $ 32,397 $ 32,397 $ 36,165 $ 36,165 Securities available for sale 2 49,809 49,809 33,103 33,103 Loans held for sale 3 5,880 6,039 3,291 3,500 Loans, net 3 250,259 249,628 222,768 221,320 Federal Home Loan Bank stock 3 316 316 220 220 Accrued interest receivable 3 978 978 798 798 Financial liabilities- Deposits 3 298,297 298,403 275,347 275,433 Off-Balance 3 - - - -

Regulatory Matters (Tables)

Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2017
Banking and Thrift [Abstract]
Summary of Regulatory Capital Requirements and Bank's Capital Position	The Bank’s actual capital amounts and percentages are also presented in the table: Actual For Capital Adequacy For Well Capitalized (dollars in thousands) Amount Percentage Amount Percentage Amount Percentage As of December 31, 2017 Tier 1 Leverage ratio to Average Assets $ 33,146 9.48 % $ 13,983 4.00 % $ 17,479 5.00 % Common Equity Tier 1 Capital to Risk-Weighted Assets 33,146 12.80 11,654 4.50 16,834 6.50 Tier 1 Capital to Risk-Weighted Assets 33,146 12.80 15,539 6.00 20,718 8.00 Total Capital to Risk-Weighted Assets 36,282 14.01 20,718 8.00 25,898 10.00 As of December 31, 2016: Tier 1 Leverage ratio to Average Assets $ 25,994 8.73 % $ 11,906 4.00 % $ 14,883 5.00 % Common Equity Tier 1 Capital to Risk-Weighted Assets 25,994 11.70 9,995 4.50 14,437 6.50 Tier 1 Capital to Risk-Weighted Assets 25,994 11.70 13,326 6.00 17,769 8.00 Total Capital to Risk-Weighted Assets 28,772 12.95 17,769 8.00 22,211 10.00

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2017
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings Per Common Share	Outstanding stock options are considered dilutive securities for purposes of calculating diluted EPS which was computed using the treasury stock method: 2017 2016 Weighted- Per Weighted- Per Average Share Average Share (dollars in thousands, except per share amounts) Earnings Shares Amount Earnings Shares Amount Year Ended December 31, Basic EPS: Net earnings $ 2,817 2,704,382 $ 1.04 $ 2,220 1,982,334 $ 1.12 Effect of dilutive securities-incremental shares from assumed conversion of options 7,317 8,827 Diluted EPS: Net earnings $ 2,817 2,711,699 $ 1.04 $ 2,220 1,991,161 $ 1.11

Parent Company Only Financial38

Parent Company Only Financial Information (Tables)	12 Months Ended
	Dec. 31, 2017
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Schedule of Condensed Balance Sheets	(in thousands) 2017 2016 Assets Cash $ 14,103 $ 1,301 Investment in subsidiary 32,850 25,761 Other assets 20 20 Total assets $ 46,973 $ 27,082 Stockholders’ Equity Stockholders’ equity $ 46,973 $ 27,082 Total liabilities and stockholders’ equity $ 46,973 $ 27,082
Schedule of Condensed Statement of Earnings	Condensed Statements of Earnings Year Ended December 31, (in thousands) 2017 2016 Revenues $ - $ - Expenses (440) (421) Income tax benefit 165 159 Loss before earnings of subsidiary (275) (262) Net earnings of subsidiary 3,092 2,482 Net earnings $ 2,817 $ 2,220
Schedule of Condensed Statement of Cash Flows	Condensed Statements of Cash Flows Year Ended December 31, (in thousands) 2017 2016 Cash flows from operating activities: Net Earnings $ 2,817 $ 2,220 Adjustments to reconcile net earnings to net cash used in operating activities: Equity in earnings of subsidiary (3,092) (2,482) Stock issued as compensation 65 55 Net decrease in other assets - 207 Net cash used in operating activities (210) - Cash flows from financing activities: Proceeds from sale of common stock 16,957 - Proceeds from stock options exercised 195 261 Net cash provided by financing activities 17,152 261 Cash flows from investment activities: Cash dividend paid (140) (99) Cash infusion to subsidiary (4,000) - Net cash used by investing activities (4,140) (99) Net increase in cash 12,802 162 Cash at beginning of the year 1,301 1,139 Cash at end of year $ 14,103 $ 1,301 Supplemental disclosure of cash flow information- Noncash items: Net change in accumulated other comprehensive loss of subsidiary, net of change in unrealized loss on securities available for sale, net of tax $ (18) $ (289) Stock-based compensation expense of subsidiary $ 15 $ 1

Summary of Significant Accoun39

Summary of Significant Accounting Policies - Additional Information (Detail)	Dec. 22, 2017	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)Office	Dec. 31, 2016USD ($)
Accounting Policies [Line Items]
Percent of outstanding common stock owns			100.00%
Number of banking offices | Office			3
Cash reserves with the Federal Reserve Bank			$ 2,618,000	$ 1,799,000
Loans held for sale			5,880,000	3,291,000
Gain on SBA loans sold			$ 0	$ 0
Tax benefit likelihood percentage			50.00%
Statutory federal income tax rate	35.00%		34.00%	34.00%
Scenario, Plan [Member]
Accounting Policies [Line Items]
Statutory federal income tax rate		21.00%
Impact of adoption of accounting standard on retained earnings and other comprehensive loss		$ 45,000

Securities Available for Sale -

Securities Available for Sale - Summary of Carrying Amount and Fair Values of Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 50,205	$ 33,473
Gross Unrealized Gains	157	129
Gross Unrealized Losses	(553)	(499)
Fair Value	49,809	33,103
US Government Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,251	2,186
Gross Unrealized Gains	6	2
Gross Unrealized Losses	(8)	(17)
Fair Value	1,249	2,171
Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	12,340	12,614
Gross Unrealized Gains	128	91
Gross Unrealized Losses	(95)	(282)
Fair Value	12,373	12,423
Mortgage-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	36,614	18,673
Gross Unrealized Gains	23	36
Gross Unrealized Losses	(450)	(200)
Fair Value	$ 36,187	$ 18,509

Securities Available for Sale41

Securities Available for Sale - Securities Available for Sale Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 49,809	$ 33,103
US Government Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	1,249	2,171
Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	12,373	12,423
Mortgage-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	36,187	18,509
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	49,809	33,103
Level 2 [Member] | US Government Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	1,249	2,171
Level 2 [Member] | Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	12,373	12,423
Level 2 [Member] | Mortgage-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 36,187	$ 18,509

Securities Available for Sale42

Securities Available for Sale - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017USD ($)Securities	Dec. 31, 2016USD ($)Securities
Investments, Debt and Equity Securities [Abstract]
Securities transferred in or out of Level 1, Level 2 or Level 3	$ 0	$ 0
Available-for-sale Securities Pledged as Collateral	$ 9,090,302	$ 9,279,000
Number of securities in unrealized loss | Securities	34	24

Securities Available for Sale43

Securities Available for Sale - Scheduled Maturities of Securities with Fair Value and Amortized Cost (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Due in less than one year, Amortized cost	$ 511
Due in one to five years, Amortized cost	2,452
Due in five to ten years, Amortized cost	7,863
Due after ten years, Amortized cost	2,765
Mortgage-backed securities, Amortized cost	36,614
Amortized Cost	50,205	$ 33,473
Due in less than one year, Fair value	511
Due in one to five years, Fair value	2,417
Due in five to ten years, Fair value	7,951
Due after ten years, Fair value	2,743
Mortgage-backed securities, Fair value	36,187
Total	$ 49,809	$ 33,103

Securities Available for Sale44

Securities Available for Sale - Schedule of Sale of Securities Available for Sale (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Proceeds from sale of securities	$ 750	$ 8,248
Gross gains		102
Gross losses	(1)
Net (loss) gain on sale of securities	$ (1)	$ 102

Securities Available for Sale45

Securities Available for Sale - Summary of Securities in Continuous Unrealized Loss Position (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses, Less Than Twelve Months	$ (352)	$ (490)
Fair Value, Less Than Twelve Months	32,267	20,349
Gross Unrealized Losses, Over Twelve Months	(201)	(9)
Fair Value, Over Twelve Months	6,870	501
US Government Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses, Less Than Twelve Months	(8)	(17)
Fair Value, Less Than Twelve Months	694	1,529
Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses, Less Than Twelve Months	(36)	(282)
Fair Value, Less Than Twelve Months	1,831	6,111
Gross Unrealized Losses, Over Twelve Months	(59)
Fair Value, Over Twelve Months	1,203
Mortgage-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses, Less Than Twelve Months	(308)	(191)
Fair Value, Less Than Twelve Months	29,742	12,709
Gross Unrealized Losses, Over Twelve Months	(142)	(9)
Fair Value, Over Twelve Months	$ 5,667	$ 501

Loans - Segments and Classes of

Loans - Segments and Classes of Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 252,971	$ 225,294
Net deferred loan costs	424	350
Allowance for loan losses	(3,136)	(2,876)	$ (2,473)
Loans, net	250,259	222,768
Mortgage Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	201,202	174,679
Mortgage Receivable [Member] | Commercial Real Estate Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	79,565	65,805
Allowance for loan losses	(894)	(775)	(707)
Mortgage Receivable [Member] | Residential and Home Equity Real Estate Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	94,824	88,883
Allowance for loan losses	(1,097)	(1,074)	(868)
Mortgage Receivable [Member] | Construction Real Estate Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	26,813	19,991
Allowance for loan losses	(331)	(258)	(246)
Loans and Finance Receivables [Member] | Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	44,027	46,340
Allowance for loan losses	(724)	(714)	(596)
Loans and Finance Receivables [Member] | Consumer and Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	7,742	4,275
Allowance for loan losses	$ (90)	$ (55)	$ (56)

Loans - Additional Information

Loans - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017USD ($)SecurityLoanClassSegmentContracts	Dec. 31, 2016Contracts
Financing Receivable, Impaired [Line Items]
Number of loan portfolio | Segment	3
Number of loan portfolio class | Class	5
Financing receivable, recorded investment, 30 days past due and still accruing	2
Financing receivable, recorded investment, 90 days past due and still accruing	0
Financing receivable, recorded investment, nonaccrual status	2
Impaired Loans [Member] | Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Loans measured at fair value on a nonrecurring basis | $	$ 0
Minimum [Member]
Financing Receivable, Impaired [Line Items]
Impairment valuation loan limit | $	$ 500,000
Minimum [Member] | Loans Receivable [Member]
Financing Receivable, Impaired [Line Items]
Maturity period of loan	1 year
Maximum [Member] | Loans Receivable [Member]
Financing Receivable, Impaired [Line Items]
Maturity period of loan	10 years
Real Estate Mortgage Loans [Member]
Financing Receivable, Impaired [Line Items]
Number of loan portfolio class | Class	3
Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
Description of interest rate of loans	Equipment loans generally have a term of five years or less and may have a fixed or variable rate
Commercial Loans [Member] | Period 1 [Member]
Financing Receivable, Impaired [Line Items]
Period of portfolio mortgage adjustable rate	1 year
Period of secondary market mortgage fixed rate	15 years
Commercial Loans [Member] | Period 2 [Member]
Financing Receivable, Impaired [Line Items]
Period of portfolio mortgage adjustable rate	3 years
Period of secondary market mortgage fixed rate	30 years
Commercial Loans [Member] | Period 3 [Member]
Financing Receivable, Impaired [Line Items]
Period of portfolio mortgage adjustable rate	5 years
Commercial Loans [Member] | Period 4 [Member]
Financing Receivable, Impaired [Line Items]
Period of portfolio mortgage adjustable rate	7 years
Commercial Loans [Member] | Minimum [Member]
Financing Receivable, Impaired [Line Items]
Maturity period of loan	3 years
Commercial Loans [Member] | Maximum [Member]
Financing Receivable, Impaired [Line Items]
Maturity period of loan	5 years
Construction Real Estate Mortgage Loans [Member] | Minimum [Member]
Financing Receivable, Impaired [Line Items]
Maturity period of loan	1 year
Construction Real Estate Mortgage Loans [Member] | Maximum [Member]
Financing Receivable, Impaired [Line Items]
Maturity period of loan	2 years
Troubled Debt Restructurings [Member]
Financing Receivable, Impaired [Line Items]
Number of loans | Contracts	0	0

Loans - Summary of Changes in A

Loans - Summary of Changes in Allowance for Loan Losses (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 2,876	$ 2,473
Provision (credit) for loan losses	256	424
Net (charge-offs) recoveries	4
Net (charge-offs) recoveries		(21)
Ending balance	3,136	2,876
Individually evaluated for impairment:
Recorded investment	134	811
Balance in allowance for loan losses	134	76
Collectively evaluated for impairment:
Recorded investment	252,837	224,483
Balance in allowance for loan losses	3,002	2,800
Mortgage Receivable [Member] | Commercial Real Estate Mortgage Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	775	707
Provision (credit) for loan losses	119	68
Ending balance	894	775
Collectively evaluated for impairment:
Recorded investment	79,565	65,805
Balance in allowance for loan losses	894	775
Mortgage Receivable [Member] | Residential and Home Equity Real Estate Mortgage Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	1,074	868
Provision (credit) for loan losses	23	206
Ending balance	1,097	1,074
Individually evaluated for impairment:
Recorded investment		662
Collectively evaluated for impairment:
Recorded investment	94,824	88,221
Balance in allowance for loan losses	1,097	1,074
Mortgage Receivable [Member] | Construction Real Estate Mortgage Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	258	246
Provision (credit) for loan losses	73	12
Ending balance	331	258
Individually evaluated for impairment:
Recorded investment		73
Collectively evaluated for impairment:
Recorded investment	26,813	19,918
Balance in allowance for loan losses	331	258
Loans and Finance Receivables [Member]
Individually evaluated for impairment:
Balance in allowance for loan losses	134	76
Loans and Finance Receivables [Member] | Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	714	596
Provision (credit) for loan losses	(6)	135
Net (charge-offs) recoveries	16
Net (charge-offs) recoveries		(17)
Ending balance	724	714
Individually evaluated for impairment:
Recorded investment	134	76
Balance in allowance for loan losses	134	76
Collectively evaluated for impairment:
Recorded investment	43,893	46,264
Balance in allowance for loan losses	590	638
Loans and Finance Receivables [Member] | Consumer and Other Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	55	56
Provision (credit) for loan losses	47	3
Net (charge-offs) recoveries	(12)
Net (charge-offs) recoveries		(4)
Ending balance	90	55
Collectively evaluated for impairment:
Recorded investment	7,742	4,275
Balance in allowance for loan losses	$ 90	$ 55

Loans - Summary of Loan Credit

Loans - Summary of Loan Credit Quality (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	$ 252,971	$ 225,294
Mortgage Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	201,202	174,679
Mortgage Receivable [Member] | Commercial Real Estate Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	79,565	65,805
Mortgage Receivable [Member] | Residential and Home Equity Real Estate Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	94,824	88,883
Mortgage Receivable [Member] | Construction Real Estate Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	26,813	19,991
Loans and Finance Receivables [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	44,027	46,340
Loans and Finance Receivables [Member] | Consumer and Other Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	7,742	4,275
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	243,787	215,764
Pass [Member] | Mortgage Receivable [Member] | Commercial Real Estate Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	74,560	61,734
Pass [Member] | Mortgage Receivable [Member] | Residential and Home Equity Real Estate Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	92,282	84,695
Pass [Member] | Mortgage Receivable [Member] | Construction Real Estate Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	26,356	19,485
Pass [Member] | Loans and Finance Receivables [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	42,874	45,623
Pass [Member] | Loans and Finance Receivables [Member] | Consumer and Other Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	7,715	4,227
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	7,420	7,852
Special Mention [Member] | Mortgage Receivable [Member] | Commercial Real Estate Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	4,382	4,071
Special Mention [Member] | Mortgage Receivable [Member] | Residential and Home Equity Real Estate Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	2,122	3,152
Special Mention [Member] | Mortgage Receivable [Member] | Construction Real Estate Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	298	333
Special Mention [Member] | Loans and Finance Receivables [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	591	250
Special Mention [Member] | Loans and Finance Receivables [Member] | Consumer and Other Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	27	46
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	1,764	1,678
Substandard [Member] | Mortgage Receivable [Member] | Commercial Real Estate Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	623
Substandard [Member] | Mortgage Receivable [Member] | Residential and Home Equity Real Estate Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	420	1,036
Substandard [Member] | Mortgage Receivable [Member] | Construction Real Estate Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	159	173
Substandard [Member] | Loans and Finance Receivables [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	$ 562	467
Substandard [Member] | Loans and Finance Receivables [Member] | Consumer and Other Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality		$ 2

Loans - Summary of Past Due Loa

Loans - Summary of Past Due Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Total Past Due	$ 878	$ 371
Current	251,959	224,112
Nonaccrual Loans	134	811
Total Loans	252,971	225,294
30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Total Past Due		371
60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Total Past Due	878
Mortgage Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	201,202	174,679
Mortgage Receivable [Member] | Commercial Real Estate Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Total Past Due	623
Current	78,942	65,805
Total Loans	79,565	65,805
Mortgage Receivable [Member] | Commercial Real Estate Mortgage Loans [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Total Past Due	623
Mortgage Receivable [Member] | Residential and Home Equity Real Estate Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Total Past Due	255	371
Current	94,569	87,850
Nonaccrual Loans		662
Total Loans	94,824	88,883
Mortgage Receivable [Member] | Residential and Home Equity Real Estate Mortgage Loans [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Total Past Due		371
Mortgage Receivable [Member] | Residential and Home Equity Real Estate Mortgage Loans [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Total Past Due	255
Mortgage Receivable [Member] | Construction Real Estate Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	26,813	19,918
Nonaccrual Loans		73
Total Loans	26,813	19,991
Loans and Finance Receivables [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	43,893	46,264
Nonaccrual Loans	134	76
Total Loans	44,027	46,340
Loans and Finance Receivables [Member] | Consumer and Other Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	7,742	4,275
Total Loans	$ 7,742	$ 4,275

Loans - Summary of Impaired Loa

Loans - Summary of Impaired Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
With an Allowance Recorded Related Allowance	$ 134	$ 76
Loans and Finance Receivables [Member]
Financing Receivable, Impaired [Line Items]
With No Related Allowing Recorded Investment		735
With No Related Allowing Unpaid Contractual Principal Balance		735
With an Allowance Recorded Investment	134	76
With an Allowance Recorded Unpaid Contractual Principal Balance	134	76
With an Allowance Recorded Related Allowance	134	76
Recorded Investment	134	811
Unpaid Contractual Principal Balance	134	811
Related Allowance	134	76
Loans and Finance Receivables [Member] | Residential and Home Equity Real Estate Mortgage Loans [Member]
Financing Receivable, Impaired [Line Items]
With No Related Allowing Recorded Investment		662
With No Related Allowing Unpaid Contractual Principal Balance		662
Recorded Investment		662
Unpaid Contractual Principal Balance		662
Loans and Finance Receivables [Member] | Construction Real Estate Mortgage Loans [Member]
Financing Receivable, Impaired [Line Items]
With No Related Allowing Recorded Investment		73
With No Related Allowing Unpaid Contractual Principal Balance		73
Recorded Investment		73
Unpaid Contractual Principal Balance		73
Loans and Finance Receivables [Member] | Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
With an Allowance Recorded Investment	134	76
With an Allowance Recorded Unpaid Contractual Principal Balance	134	76
With an Allowance Recorded Related Allowance	134	76
Recorded Investment	134	76
Unpaid Contractual Principal Balance	134	76
Related Allowance	$ 134	$ 76

Loans - Summary of Average Net

Loans - Summary of Average Net Investment in Impaired Loans and Interest Income Recognized and Received on Impaired Loans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	$ 383	$ 480
Interest Income Recognized	29	7
Interest Income Received	32	20
Residential and Home Equity Real Estate Mortgage Loans [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	277	354
Interest Income Recognized	28
Interest Income Received	28	14
Construction Real Estate Mortgage Loans [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	42	19
Interest Income Recognized	1
Interest Income Received	4
Loans and Finance Receivables [Member] | Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	$ 64	107
Interest Income Recognized		7
Interest Income Received		$ 6

Loans - Summary of Loans Determ

Loans - Summary of Loans Determined to be Troubled Debt Restructurings (Detail) - Residential and Home Equity Real Estate Mortgage Loans [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)Contracts
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contracts	1
Pre-Modification Outstanding Recorded Investment	$ 153
Post-Modification Outstanding Recorded Investment	169
Current Modification Outstanding Recorded Investment	$ 164
Modified Principal [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contracts	1
Pre-Modification Outstanding Recorded Investment	$ 153
Post-Modification Outstanding Recorded Investment	169
Current Modification Outstanding Recorded Investment	$ 164

Premises and Equipment - Summar

Premises and Equipment - Summary of Premises and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Total, at cost	$ 8,142	$ 7,679
Less accumulated depreciation and amortization	(3,270)	(2,750)
Premises and equipment, net	4,872	4,929
Land [Member]
Property, Plant and Equipment [Line Items]
Total, at cost	690	690
Buildings [Member]
Property, Plant and Equipment [Line Items]
Total, at cost	3,736	2,461
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total, at cost	416	411
Furniture, Fixtures and Equipment [Member]
Property, Plant and Equipment [Line Items]
Total, at cost	1,160	993
Computer and Software [Member]
Property, Plant and Equipment [Line Items]
Total, at cost	$ 2,140	1,943
Construction in progress [Member]
Property, Plant and Equipment [Line Items]
Total, at cost		$ 1,181

Premises and Equipment - Additi

Premises and Equipment - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Property Plant And Equipment Capitalized Interest Costs [Abstract]
Operating lease, expiry date	2,022
Operating lease, description	The Company also had an operating lease that expired in November, 2017, with no options to renew.
Rent expense under operating lease	$ 155,000	$ 147,000
Options to extend operating lease	One 5-year option to extend
Operating lease, expiry period	2017-11

Premises and Equipment - Schedu

Premises and Equipment - Schedule of Future Minimum Rental Commitments (Detail) $ in Thousands	Dec. 31, 2017USD ($)
Property Plant And Equipment Capitalized Interest Costs [Abstract]
2,018	$ 90
2,019	90
2,020	90
2,021	90
2,022	90
Total	$ 450

Deposits - Additional Informati

Deposits - Additional Information (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Time Deposits, Fiscal Year Maturity [Abstract]
Aggregate amount of time deposits with a minimum denomination of $250,000	$ 10.7	$ 9

Deposits - Schedule of Maturiti

Deposits - Schedule of Maturities of Time Deposits (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Time Deposits, Fiscal Year Maturity [Abstract]
2,018	$ 16,942
2,019	2,457
2,020	538
2,021	21
2,022	2,096
Total	$ 22,054	$ 20,723

Other borrowings - Additional I

Other borrowings - Additional Information (Detail) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Equity Method Investments And Cost Method Investments [Abstract]
Maximum borrowing limit under FHLB	$ 41,700,000
FHLB advances outstanding	0	$ 0
Current borrowing limit under FHLB	$ 16,300,000

Income Taxes - Components of In

Income Taxes - Components of Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Current:
Federal	$ 1,309	$ 1,031
State	224	180
Total current	1,533	1,211
Deferred:
Federal	193	1
State	9	5
Total deferred	202	6
Total income taxes	$ 1,735	$ 1,217

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	Dec. 22, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Contingency [Line Items]
Statutory federal income tax rate	35.00%		34.00%	34.00%
Change in federal rate, Amount	$ 155,000		$ 155,000
Scenario, Plan [Member]
Income Tax Contingency [Line Items]
Statutory federal income tax rate		21.00%

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of statutory Federal Income Tax Rate and Effective Tax Rates (Detail) - USD ($)	Dec. 22, 2017	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income taxes at statutory rate, Amount		$ 1,548,000	$ 1,169,000
Increase (decrease) resulting from:
State taxes, net of federal tax benefit, Amount		154,000	122,000
Tax-exempt income, Amount		(97,000)	(82,000)
Stock based compensation, Amount		(60,000)
Change in federal rate, Amount	$ 155,000	155,000
Other nondeductible expenses, Amount		35,000	8,000
Total income taxes		$ 1,735,000	$ 1,217,000
Income taxes at statutory rate, % of Pretax Earnings	35.00%	34.00%	34.00%
Increase (decrease) resulting from:
State taxes, net of federal tax benefit, % of Pretax Earnings		3.40%	3.50%
Tax-exempt income, % of Pretax Earnings, % of Pretax Earnings		(2.10%)	(2.40%)
Stock based compensation, % of Pretax Earnings		(1.30%)
Change in federal rate, % of Pretax Earnings		3.40%
Other nondeductible expenses, % of Pretax Earnings		0.70%	0.30%
Income taxes, % of Pretax Earnings		38.10%	35.40%

Income Taxes - Summary of Tax E

Income Taxes - Summary of Tax Effects of Temporary Differences on Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets:
Allowance for loan losses	$ 744	$ 1,008
Organizational and start-up costs	49	87
Stock-based compensation	12	18
Unrealized losses on securities available for sale	100	137
Other	23	16
Deferred tax assets	928	1,266
Deferred tax liabilities:
Prepaid Expenses	(70)	(69)
Deferred loan costs	(317)	(392)
Premises and equipment	(202)	(272)
Deferred tax liabilities	(589)	(733)
Net deferred tax asset	$ 339	$ 533

Off-Balance Sheet Financial I64

Off-Balance Sheet Financial Instruments - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017USD ($)
Standby Financial Letters of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Debt instrument maturity period	1 year
Collateral amount	$ 413,000
Contractual amounts with off-balance-sheet risk	$ 1,812,000
Standby Financial Letters of Credit [Member] | Credit Availability Concentration Risk [Member] | Swap Liabilities [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Percentage of additional credit limit guaranteed	10.00%
Swap Participation Agreement [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts with off-balance-sheet risk	$ 45,000
Swap Participation Agreement [Member] | Credit Availability Concentration Risk [Member] | Swap Liabilities [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Percentage of additional credit limit guaranteed	13.208%

Off-Balance Sheet Financial I65

Off-Balance Sheet Financial Instruments - Summary of Contractual Amounts of Financial Instruments (Detail)	12 Months Ended
	Dec. 31, 2017USD ($)
Commitments to Extend Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts with off-balance-sheet risk	$ 1,108,000
Construction Loans in Process [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts with off-balance-sheet risk	15,681,000
Unused Lines of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts with off-balance-sheet risk	37,959,000
Standby Financial Letters of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts with off-balance-sheet risk	1,812,000
Performance Stand By Letters Of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts with off-balance-sheet risk	104,000
Guaranteed Accounts [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts with off-balance-sheet risk	$ 1,220,000

Stock Compensation Plans - Addi

Stock Compensation Plans - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 15,000	$ 0
2015 Stock Incentive Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	11,540
2015 Stock Incentive Compensation Plan [Member] | Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares to be issued under stock option plan	500,000
Number of shares issued under stock option plan	0
Maximum percentage of shares issued	15.00%
Shares granted	11,540
Shares available for grant	456,307
Unrecognized compensation expense related to nonvested share-based compensation arrangements granted	$ 0
Directors Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares to be issued under stock option plan	74,805
Shares granted	3,912	3,928
Shares available for grant	58,102
Stock consideration on percentage of common stock received upon cash fees	110.00%

Stock Compensation Plans - Summ

Stock Compensation Plans - Summary of Company's Plan (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017
2015 Stock Incentive Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-Average Exercise Price, Options granted	$ 17.03
Number of Options, granted	11,540
Weighted-Average Exercise Price, Outstanding beginning balance	$ 17.03		$ 17.03
Number of Options, Outstanding ending balance	11,540
Number of Options, Exercisable ending balance			11,540
Weighted-Average Exercise Price, Outstanding ending balance	$ 17.03
Weighted-Average Exercise Price, Exercisable			$ 17.03
Weighted-Average Remaining Contractual Term, Outstanding	4 years 1 month 6 days
Weighted-Average Remaining Contractual Term, Exercisable	4 years 1 month 6 days
Aggregate Intrinsic Value, Outstanding			$ 16,000
Aggregate Intrinsic Value, Exercisable			$ 16,000
2007 Incentive Award Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options, Outstanding beginning balance	42,200	75,500
Number of Options, exercised	(19,450)	(25,450)
Weighted-Average Exercise Price, Outstanding beginning balance	$ 10.16	$ 10.19	$ 10.31
Number of Options, forfeited	(550)	(7,850)
Number of Options, Outstanding ending balance	22,200	42,200
Weighted-Average Exercise Price, Outstanding beginning balance	$ 10.16	$ 10.19
Number of Options, Exercisable ending balance			21,700
Weighted-Average Exercise Price, Options exercised	10	10.29
Weighted-Average Exercise Price, Options forfeited	10	10
Weighted-Average Exercise Price, Outstanding ending balance	$ 10.31	$ 10.16
Weighted-Average Exercise Price, Exercisable			$ 10.30
Weighted-Average Remaining Contractual Term, Outstanding	1 year 8 months 12 days
Weighted-Average Remaining Contractual Term, Exercisable	1 year 8 months 12 days
Aggregate Intrinsic Value, Outstanding			$ 180,000
Aggregate Intrinsic Value, Exercisable			$ 176,000

Stock Compensation Plans - Blac

Stock Compensation Plans - Black-Scholes Option-Pricing Model Assumptions (Detail)	12 Months Ended
	Dec. 31, 2017$ / shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Weighted average risk-free interest rate	1.48%
Expected dividend yield	0.40%
Expected stock volatility	8.54%
Expected life in years	3 years
Per share fair value of options issued during period	$ 1.26

Profit Sharing Plan - Additiona

Profit Sharing Plan - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Retirement Benefits [Abstract]
Company contribution to 401(k) profit sharing plan	$ 142,000	$ 128,000

Related Party Transactions - Su

Related Party Transactions - Summary of Activity of Loans to Related Parties (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Related Party Transactions [Abstract]
Beginning balance	$ 5,942	$ 6,082
Originated during the year	634	1,216
Principal repayments	(706)	(1,356)
Ending balance	5,870	5,942
Deposits at year end	$ 10,008	$ 13,947

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Related Party Transaction [Line Items]
Rent expense under operating lease	$ 155,000	$ 147,000
Premiums paid	740,000	523,000
Related Party [Member]
Related Party Transaction [Line Items]
Rent expense under operating lease	$ 0	$ 10,000

Fair Value of Financial Instr72

Fair Value of Financial Instruments - Schedule of Carrying Amounts and Estimated Fair Values of Financial Instruments (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 32,397	$ 36,165	$ 8,429
Securities available for sale	49,809	33,103
Loans held for sale	5,880	3,291
Loans, net	250,259	222,768
Federal Home Loan Bank stock	316	220
Accrued interest receivable	978	798
Deposits	298,297	275,347
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	49,809	33,103
Estimated Fair Value [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	32,397	36,165
Estimated Fair Value [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	49,809	33,103
Estimated Fair Value [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held for sale	6,039	3,500
Loans, net	249,628	221,320
Federal Home Loan Bank stock	316	220
Accrued interest receivable	978	798
Deposits	298,403	275,433
Off-Balance Sheet financial instruments	0	0
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	32,397	36,165
Securities available for sale	49,809	33,103
Loans held for sale	5,880	3,291
Loans, net	250,259	222,768
Federal Home Loan Bank stock	316	220
Accrued interest receivable	978	798
Deposits	298,297	275,347
Off-Balance Sheet financial instruments	$ 0	$ 0

Regulatory Matters - Additional

Regulatory Matters - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Regulatory Capital Requirements [Abstract]
Percentage of capital conservation buffer minimum risk-based capital requirement	1.25%	0.625%
Capital conservation buffer phase period	2 years
Capital conservation buffer required	2.50%
Capital conservation buffer yearly phase in increase	0.625%

Regulatory Matters - Summary of

Regulatory Matters - Summary of Regulatory Capital Requirements and Bank's Capital Position (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Banking and Thrift [Abstract]
Tier 1 Leverage ratio to Average Assets, Actual amount	$ 33,146	$ 25,994
Tier 1 Leverage ratio to Average Assets, Actual Percentage	9.48%	8.73%
Tier 1 Leverage ratio to Average Assets, For Capital Adequacy Purposes, Amount	$ 13,983	$ 11,906
Tier 1 Leverage ratio to Average Assets, For Capital Adequacy Purposes, Percentage	4.00%	4.00%
Tier 1 Leverage ratio to Average Assets, For Well Capitalized Purposes, Amount	$ 17,479	$ 14,883
Tier 1 Leverage ratio to Average Assets, For Well Capitalized Purposes, Percentage	5.00%	5.00%
Common Equity Tier 1 Capital to Risk-Weighted Assets, Actual amount	$ 33,146	$ 25,994
Common Equity Tier 1 Capital to Risk-Weighted Assets, Actual Percentage	12.80%	11.70%
Common Equity Tier 1 Capital to Risk-Weighted Assets, For Capital Adequacy Purposes, Amount	$ 11,654	$ 9,995
Common Equity Tier 1 Capital to Risk-Weighted Assets, For Capital Adequacy Purposes, Percentage	4.50%	4.50%
Common Equity Tier 1 Capital to Risk-Weighted Assets, For Well Capitalized Purposes, Amount	$ 16,834	$ 14,437
Common Equity Tier 1 Capital to Risk-Weighted Assets, For Well Capitalized Purposes, Percentage	6.50%	6.50%
Tier 1 Capital to Risk-Weighted Assets, Actual Amount	$ 33,146	$ 25,994
Tier 1 Capital to Risk-Weighted Assets, Actual Percentage	12.80%	11.70%
Tier 1 Capital to Risk-Weighted Assets, For Capital Adequacy Purposes, Amount	$ 15,539	$ 13,326
Tier 1 Capital to Risk-Weighted Assets, For Capital Adequacy Purposes, Percentage	6.00%	6.00%
Tier 1 Capital to Risk-Weighted Assets, For Well Capitalized Purposes, Amount	$ 20,718	$ 17,769
Tier 1 Capital to Risk-Weighted Assets, For Well Capitalized Purposes, Percentage	8.00%	8.00%
Total Capital to Risk-Weighted Assets, Actual Amount	$ 36,282	$ 28,772
Total Capital to Risk-Weighted Assets, Actual Percentage	14.01%	12.95%
Total Capital to Risk-Weighted Assets, For Capital Adequacy Purposes, Amount	$ 20,718	$ 17,769
Total Capital to Risk-Weighted Assets, For Capital Adequacy Purposes, Percentage	8.00%	8.00%
Total Capital to Risk-Weighted Assets, For Well Capitalized Purposes, Amount	$ 25,898	$ 22,211
Total Capital to Risk-Weighted Assets, For Well Capitalized Purposes, Percentage	10.00%	10.00%

Earnings Per Share - Computatio

Earnings Per Share - Computation of Basic and Diluted Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Earnings	$ 2,817	$ 2,220
Earnings	$ 2,817	$ 2,220
Weighted-Average Shares	2,704,382	1,982,334
Effect of dilutive securities-incremental shares from assumed conversion of options	7,317	8,827
Weighted-Average Shares	2,711,699	1,991,161
Per Share Amount	$ 1.04	$ 1.12
Per Share Amount	$ 1.04	$ 1.11

Parent Company Only Financial76

Parent Company Only Financial Information - Schedule of Condensed Balance Sheets (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Assets
Cash	$ 32,397	$ 36,165	$ 8,429
Other assets	573	423
Total assets	347,180	303,941
Stockholders' Equity
Stockholders' equity	46,973	27,082	24,933
Total liabilities and stockholders' equity	347,180	303,941
Parent Company [Member]
Assets
Cash	14,103	1,301	$ 1,139
Investment in subsidiary	32,850	25,761
Other assets	20	20
Total assets	46,973	27,082
Stockholders' Equity
Stockholders' equity	46,973	27,082
Total liabilities and stockholders' equity	$ 46,973	$ 27,082

Parent Company Only Financial77

Parent Company Only Financial Information - Schedule of Condensed Statement of Earnings (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Condensed Financial Information Of Parent Company Only Disclosure [Line Items]
Income tax benefit	$ (1,735)	$ (1,217)
Net earnings	2,817	2,220
Parent Company [Member]
Condensed Financial Information Of Parent Company Only Disclosure [Line Items]
Revenues	0	0
Expenses	(440)	(421)
Income tax benefit	165	159
Loss before earnings of subsidiary	(275)	(262)
Net earnings of subsidiary	3,092	2,482
Net earnings	$ 2,817	$ 2,220

Parent Company Only Financial78

Parent Company Only Financial Information - Schedule of Condensed Statement of Cash Flows (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net Earnings	$ 2,817	$ 2,220
Adjustments to reconcile net earnings to net cash used in operating activities:
Stock issued as compensation	15	1
Net decrease in other assets	(150)	198
Cash flows from financing activities:
Proceeds from sale of common stock	16,957
Proceeds from stock options exercised	195	261
Cash flows from investment activities:
Net (decrease) increase in cash and cash equivalents	(3,768)	27,736
Cash and cash equivalents at beginning of year	36,165	8,429
Cash and cash equivalents at end of year	32,397	36,165
Supplemental disclosure of cash flow information- Noncash items:
Net change in accumulated other comprehensive loss of subsidiary, net of change in unrealized loss on securities available for sale, net of tax	(18)	(289)
Parent Company [Member]
Cash flows from operating activities:
Net Earnings	2,817	2,220
Adjustments to reconcile net earnings to net cash used in operating activities:
Equity in earnings of subsidiary	(3,092)	(2,482)
Stock issued as compensation	65	55
Net decrease in other assets		207
Net cash used in operating activities	(210)
Cash flows from financing activities:
Proceeds from sale of common stock	16,957
Proceeds from stock options exercised	195	261
Net cash provided by financing activities	17,152	261
Cash flows from investment activities:
Cash dividend paid	(140)	(99)
Cash infusion to subsidiary	(4,000)
Net cash used by investing activities	(4,140)	(99)
Net (decrease) increase in cash and cash equivalents	12,802	162
Cash and cash equivalents at beginning of year	1,301	1,139
Cash and cash equivalents at end of year	14,103	1,301
Supplemental disclosure of cash flow information- Noncash items:
Net change in accumulated other comprehensive loss of subsidiary, net of change in unrealized loss on securities available for sale, net of tax	(18)	(289)
Stock-based compensation expense of subsidiary	$ 15	$ 1