Prime Meridian Holding (PMHG) 10-Q 9 Nov 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Nov. 09, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
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 Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		3,102,127

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Assets
Cash and due from banks	$ 8,930	$ 4,817
Federal funds sold	19,865	25,963
Interest bearing deposits	5,528	5,385
Total cash and cash equivalents	34,323	36,165
Securities available for sale	48,744	33,103
Loans held for sale	7,459	3,291
Loans, net of allowance for loan losses of $3,072 and $2,876	245,160	222,768
Federal Home Loan Bank stock	316	220
Premises and equipment, net	4,935	4,929
Accrued interest receivable	875	798
Bank owned life insurance	1,746	1,711
Other assets	983	956
Total assets	344,541	303,941
Liabilities:
Non-interest bearing demand deposits	70,704	61,856
Savings, NOW and money-market deposits	203,131	192,768
Time deposits	22,879	20,723
Total deposits	296,714	275,347
Official checks	566	632
Other liabilities	934	880
Total liabilities	298,214	276,859
Stockholders' equity:
Preferred stock, undesignated; 1,000,000 shares authorized, none issued or outstanding
Common stock, $.01 par value; 9,000,000 shares authorized, 3,101,319 and 2,004,707 issued and outstanding	31	20
Additional paid-in capital	37,770	20,732
Retained earnings	8,546	6,563
Accumulated other comprehensive loss	(20)	(233)
Total stockholders' equity	46,327	27,082
Total liabilities and stockholders' equity	$ 344,541	$ 303,941

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Loans receivable, allowance for loan losses	$ 3,072	$ 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	3,101,319	2,004,707
Common stock, shares outstanding	3,101,319	2,004,707

Consolidated Statements of Earn

Consolidated Statements of Earnings - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Interest income:
Loans	$ 3,025	$ 2,573	$ 8,498	$ 7,294
Securities	252	156	709	538
Other	114	26	271	74
Total interest income	3,391	2,755	9,478	7,906
Interest expense:
Deposits	326	205	829	598
Other borrowings		1		1
Total interest expense	326	206	829	599
Net interest income	3,065	2,549	8,649	7,307
Provision for loan losses	32	108	187	412
Net interest income after provision for loan losses	3,033	2,441	8,462	6,895
Non-interest income:
Service charges and fees on deposit accounts	80	74	241	174
Mortgage banking revenue	275	260	943	637
Income from bank owned life insurance	12	12	35	37
(Loss) gain on sale of securities available for sale			(1)	102
Other income	88	69	258	206
Total non-interest income	455	415	1,476	1,156
Non-interest expense:
Salaries and employee benefits	1,248	1,062	3,734	3,006
Occupancy and equipment	247	209	727	624
Professional fees	90	81	235	285
Advertising	129	94	440	361
FDIC assessment	35	36	123	102
Software maintenance, amortization and other	132	125	394	375
Other	321	304	977	863
Total non-interest expense	2,202	1,911	6,630	5,616
Earnings before income taxes	1,286	945	3,308	2,435
Income taxes	464	335	1,185	861
Net earnings	$ 822	$ 610	$ 2,123	$ 1,574
Earnings per common share:
Basic	$ 0.26	$ 0.31	$ 0.83	$ 0.79
Diluted	$ 0.26	$ 0.31	0.83	0.79
Cash dividends per common share			$ 0.07	$ 0.05

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net earnings	$ 822	$ 610	$ 2,123	$ 1,574
Change in unrealized (loss) gain on securities:
Unrealized (loss) gain arising during the period	5	(64)	338	593
Reclassification adjustment for realized loss (gain)			1	(102)
Net change in unrealized (loss) gain	5	(64)	339	491
Deferred income (taxes) benefit on above change	(2)	24	(126)	(181)
Total other comprehensive income (loss)	3	(40)	213	310
Comprehensive income	$ 825	$ 570	$ 2,336	$ 1,884

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 (unaudited)	1,574			1,574
Dividends paid (unaudited)	(99)			(99)
Net change in unrealized gain/loss on securities available for sale, net of income taxes (unaudited)	310				310
Stock options exercised (unaudited), Value	82		82
Stock options exercised (unaudited), Shares		7,500
Common stock issued as compensation to directors (unaudited), Value	40		40
Common stock issued as compensation to directors (unaudited), Shares		2,857
Stock based compensation (unaudited)	1		1
Ending Balance (unaudited), Value at Sep. 30, 2016	26,841	$ 20	20,538	5,917	366
Ending Balance (unaudited), Shares at Sep. 30, 2016		1,985,686
Beginning Balance, Value at Dec. 31, 2016	$ 27,082	$ 20	20,732	6,563	(233)
Beginning Balance, Shares at Dec. 31, 2016	2,004,707	2,004,707
Net earnings (unaudited)	$ 2,123			2,123
Dividends paid (unaudited)	(140)			(140)
Net change in unrealized gain/loss on securities available for sale, net of income taxes (unaudited)	213				213
Stock options exercised (unaudited), Value	26		26
Stock options exercised (unaudited), Shares		2,600
Common stock issued as compensation to directors (unaudited), Value	51		51
Common stock issued as compensation to directors (unaudited), Shares		3,104
Sale of common stock (unaudited) net of stock offering costs, Value	16,957	$ 11	16,946
Sale of common stock (unaudited) net of stock offering costs, Shares		1,090,908
Stock based compensation (unaudited)	15		15
Ending Balance (unaudited), Value at Sep. 30, 2017	$ 46,327	$ 31	$ 37,770	$ 8,546	$ (20)
Ending Balance (unaudited), Shares at Sep. 30, 2017	3,101,319	3,101,319

Consolidated Statements of Sto7

Consolidated Statements of Stockholders' Equity (Parenthetical) $ in Thousands	9 Months Ended
	Sep. 30, 2017USD ($)
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

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net earnings	$ 2,123	$ 1,574
Adjustments to reconcile net earnings to net cash (used in) provided by operating activities:
Depreciation and amortization	390	395
Provision for loan losses	187	412
Net amortization of deferred loan fees	(118)	(1)
Loss (gain) on sale of securities available for sale	1	(102)
Amortization of premiums and discounts on securities available for sale	310	332
Gain on sale of loans held for sale	(822)	(558)
Proceeds from the sale of loans held for sale	48,919	33,268
Loans originated as held for sale	(52,265)	(33,513)
Stock issued as compensation	51	40
Stock based compensation expense	15	1
Income from bank owned life insurance	(35)	(37)
Net increase in accrued interest receivable	(77)	(13)
Net (increase) decrease in other assets	(153)	205
Net (decrease) increase in other liabilities and official checks	(12)	429
Net cash (used in) provided by operating activities	(1,486)	2,432
Cash flows from investing activities:
Loan originations, net of principal repayments	(22,461)	(36,103)
Purchase of securities available for sale	(20,510)	(10,416)
Principal repayments of securities available for sale	4,099	6,488
Proceeds from sale of securities available for sale	750	8,248
Maturities and calls of securities available for sale	48	1,290
Purchase of Federal Home Loan Bank stock	(96)	(31)
Purchase of premises and equipment	(396)	(826)
Net cash used in investing activities	(38,566)	(31,350)
Cash flows from financing activities:
Net increase in deposits	21,367	43,583
Proceeds from stock options exercised	26	82
Proceeds from sale of common stock, net	16,957
Common stock dividends paid	(140)	(99)
Net cash provided by financing activities	38,210	43,566
Net (decrease) increase in cash and cash equivalents	(1,842)	14,648
Cash and cash equivalents at beginning of period	36,165	8,429
Cash and cash equivalents at end of period	34,323	23,077
Supplemental disclosure of cash flow information Cash paid during the period for:
Interest	827	525
Income taxes	1,223	670
Noncash transaction-
Accumulated other comprehensive loss, net change in unrealized (loss) gain on securities available for sale, net of taxes	$ 213	$ 310

General

General	9 Months Ended
	Sep. 30, 2017
Accounting Policies [Abstract]
General	(1) General Prime Meridian Holding Company (“PMHG”) owns 100% of the outstanding common stock of Prime Meridian Bank (the “Bank”) (collectively the “Company”). PMHG’s primary activity is the operation of the Bank. The Bank is a Florida state-chartered commercial bank, and the deposit accounts of the Bank are insured up to the applicable limits by the Federal Deposit Insurance Corporation (“FDIC”). The Bank offers a variety of community banking services to individual and corporate clients through its three banking offices located in Tallahassee and Crawfordville, Florida and its online banking platform. The accounting and financial reporting policies the Company follows conform, in all material respects, to accounting principles generally accepted in the United States (“GAAP”) and to general practices within the banking industry. The condensed consolidated financial statements in the Quarterly Report on Form 10-Q 10-Q 10-K Comprehensive Income. available-for-sale Stock Based Compensation. 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 September 2016, the FASB issued ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326) available-for-sale In January 2017, the FASB issued ASU No. 2017-01, Business In March 2017, the FASB issued ASU No. 2017-08,

Securities Available for Sale

Securities Available for Sale	9 Months Ended
	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Securities Available for Sale	(2) Securities Available for Sale Securities are classified according to management’s intent. The carrying amount of securities and fair values are as follows: Amortized Gross Gross Fair Value (in thousands) At September 30, 2017 U.S. Government agency securities $ 1,252 $ 5 $ (1 ) $ 1,256 Municipal securities 12,408 170 (68 ) 12,510 Mortgage-backed securities 35,115 52 (189 ) 34,978 Total $ 48,775 $ 227 $ (258 ) $ 48,744 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 The following table summarizes the sale of securities available for sale. Three Months Ended Nine Months Ended (in thousands) 2017 2016 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 Securities with gross unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous loss position, are as follows: Less Than Twelve Months Over Twelve Months Gross Fair Value Gross Fair Value (in thousands) At September 30, 2017 Securities Available for Sale U.S. Government agency securities $ (1 ) $ 701 $ — $ — Municipal securities (42 ) 2,695 (26 ) 898 Mortgage-backed securities (181 ) 21,573 (8 ) 374 Total $ (224 ) $ 24,969 $ (34 ) $ 1,272 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 at September 30, 2017 and December 31, 2016 on twenty-three and twenty-four securities, 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. Securities available for sale measured at fair value on a recurring basis are summarized below: Fair Value Measurements Using Fair Value Quoted Prices Significant Significant (Level 3) (in thousands) At September 30, 2017 U.S. Government agency securities $ 1,256 $ — $ 1,256 $ — Municipal securities 12,510 — 12,510 — Mortgage-backed securities 34,978 — 34,978 — Total $ 48,744 $ — $ 48,744 $ — 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 three and nine months ended September 30, 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: At September 30, 2017 Amortized Fair Value (in thousands) Due in one to five years $ 2,976 $ 2,959 Due in five to ten years 7,899 8,048 Due after ten years 2,785 2,759 Mortgage-backed securities 35,115 34,978 Total $ 48,775 $ 48,744

Loans

Loans	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
Loans	(3) Loans The composition of the Company’s loan portfolio, excluding loans held for sale, was the following for the periods presented below: (in thousands) At September 30, At December 31, Real estate mortgage loans: Commercial $ 77,084 $ 65,805 Residential and home equity 94,145 88,883 Construction 23,366 19,991 Total real estate mortgage loans 194,595 174,679 Commercial loans 46,193 46,340 Consumer and other loans 6,976 4,275 Total loans 247,764 225,294 Add (deduct): Net deferred loan costs 468 350 Allowance for loan losses (3,072 ) (2,876 ) Loans, net $ 245,160 $ 222,768 An analysis of the change in allowance for loan losses follows: Real Estate Mortgage Loans (in thousands) Commercial Residential Construction Commercial Consumer Total Three-Month Period Ended September 30, 2017 Beginning balance $ 811 $ 1,108 $ 338 $ 712 $ 59 $ 3,028 Provision (credit) for loan losses 49 (18 ) (51 ) 28 24 32 Net (charge-offs) recoveries — — — 12 — 12 Ending balance $ 860 $ 1,090 $ 287 $ 752 $ 83 $ 3,072 Three-Month Period Ended September 30, 2016 Beginning balance $ 764 $ 1,017 $ 243 $ 686 $ 65 $ 2,775 Provision (credit) for loan losses 11 28 32 40 (3 ) 108 Net (charge-offs) recoveries — — — (17 ) (3 ) (20 ) Ending balance $ 775 $ 1,045 $ 275 $ 709 $ 59 $ 2,863 Nine-Month Period Ended September 30, 2017 Beginning balance $ 775 $ 1,074 $ 258 $ 714 $ 55 $ 2,876 Provision (credit) for loan losses 85 16 29 24 33 187 Net (charge-offs) recoveries — — — 14 (5 ) 9 Ending balance $ 860 $ 1,090 $ 287 $ 752 $ 83 $ 3,072 Nine-Month Period Ended September 30, 2016 Beginning balance $ 707 $ 868 $ 246 $ 596 $ 56 $ 2,473 Provision (credit) for loan losses 68 177 29 130 8 412 Net (charge-offs) recoveries — — — (17 ) (5 ) (22 ) Ending balance $ 775 $ 1,045 $ 275 $ 709 $ 59 $ 2,863 At September 30, 2017 Individually evaluated for impairment: Recorded investment $ — $ — $ — $ 137 $ — $ 137 Balance in allowance for loan losses $ — $ — $ — $ 137 $ — $ 137 Collectively evaluated for impairment: Recorded investment $ 77,084 $ 94,145 $ 23,366 $ 46,056 $ 6,976 $ 247,627 Balance in allowance for loan losses $ 860 $ 1,090 $ 287 $ 615 $ 83 $ 2,935 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 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 Company identifies the portfolio segments and classes as follows: Real Estate Mortgage Loans. Commercial. non-owner 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 Other factors of risk could include changes in the borrower’s management and fluctuations in collateral value. Additionally, there may be refinancing risk if a commercial loan includes a balloon payment which must be refinanced or paid off at loan maturity. In reference to our risk management process, our commercial loan portfolio presents a higher risk profile than our consumer real estate and consumer loan portfolios. Therefore, we require that all loans to businesses must have a clearly stated and reasonable payment plan to allow for timely retirement of debt, unless secured by liquid collateral or as otherwise justified. Consumer and Other Loans. The following summarizes the loan credit quality: Real Estate Mortgage Loans (in thousands) Commercial Residential Construction Commercial Consumer Total At September 30, 2017 Grade: Pass $ 72,027 $ 91,598 $ 22,909 $ 44,549 $ 6,948 $ 238,031 Special mention 5,057 2,381 298 1,069 28 8,833 Substandard — 166 159 575 — 900 Doubtful — — — — — — Loss — — — — — — Total $ 77,084 $ 94,145 $ 23,366 $ 46,193 $ 6,976 $ 247,764 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. Furthermore, construction loans, non-owner 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 September 30, 2017, there was one nonaccrual loan, totaling $60,000. Age analysis of past due loans is as follows: Accruing Loans (in thousands) 30-59 Days 60-89 Days Greater Than Total Past Current Nonaccrual Total Loans At September 30, 2017: Real estate mortgage loans: Commercial $ 626 $ — $ — $ 626 $ 76,458 $ — $ 77,084 Residential and home equity — — — — 94,145 — 94,145 Construction — — — — 23,366 — 23,366 Commercial loans — — — — 46,133 60 46,193 Consumer and other loans — — — — 6,976 — 6,976 Total $ 626 $ — $ — $ 626 $ 247,078 $ 60 $ 247,764 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 With an Allowance Recorded Total (in thousands) Recorded Unpaid Recorded Unpaid Related Recorded Unpaid Related At September 30, 2017: Commercial loans $ — $ — $ 137 $ 137 $ 137 $ 137 $ 137 $ 137 Total $ — $ — $ 137 $ 137 $ 137 $ 137 $ 137 $ 137 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 are as follows: Three Months Ended September 30, 2017 2016 (in thousands) Average Interest Interest Average Interest Interest Real estate mortage loans: Residential and home equity $ — $ 6 $ — $ 361 $ — $ — Construction 63 1 1 88 — — Commercial loans 22 — — 1 — — Consumer — — — 7 — — Total $ 85 $ 7 $ 1 $ 457 $ — $ — Nine Months Ended September 30, 2017 2016 (in thousands) Average Interest Interest Average Interest Interest Real estate mortgage loans: Residential and home equity $ 375 $ 28 $ 28 $ 119 $ — $ — Construction 66 1 2 91 — — Commercial loans 56 — — — — — Consumer — — — 3 — — Total $ 497 $ 29 $ 30 $ 213 $ — $ — There were no collateral dependent loans measured at fair value on a nonrecurring basis at September 30, 2017 or September 30, 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. For the three-month periods ended September 30, 2017 and 2016 and the nine-month period ended September 30, 2016, there were no new loans determined to be TDRs. For the nine-month period ended September 30, 2017, there was one new loan determined to be a TDR. Nine Months Ended September 30, 2017 (in thousands) Number of Pre- Post- Current Troubled Debt Restructurings - Residential and home equity: Modified principal 1 $ 153 $ 169 $ 165 Total 1 $ 153 $ 169 $ 165 At September 30, 2017, the Company had $225,000 in loans identified as TDRs.

Regulatory Capital

Regulatory Capital	9 Months Ended
	Sep. 30, 2017
Banking and Thrift [Abstract]
Regulatory Capital	(4) Regulatory Capital 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 Effective January 1, 2015, the Bank, became subject to the new Basel III capital level threshold requirements under the Prompt Corrective Action regulations with full compliance with all of the final rule’s requirements phased in over a multi-year schedule. These new 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. Under the new regulations in the first quarter of 2015, the Bank elected an irreversible one-time opt-out Quantitative measures established by regulation to ensure capital adequacy require the Bank to maintain minimum amounts and percentages (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 September 30, 2017 that the Bank meets all capital adequacy requirements to which it is subject. As of September 30, 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 following table. Actual For Capital Adequacy For Well Capitalized (dollars in thousands) Amount Percentage Amount Percentage Amount Percentage As of September 30, 2017 Tier 1 Leverage Capital $ 32,345 9.38 % $ 13,791 4.00 % $ 17,238 5.00 % Common Equity Tier 1 Risk-based Capital 32,345 12.76 11,407 4.50 16,477 6.50 Tier 1 Risk-based Capital 32,345 12.76 15,210 6.00 20,280 8.00 Total Risk-based Capital 35,417 13.97 20,280 8.00 25,350 10.00 As of December 31, 2016 Tier 1 Leverage Capital 25,994 8.73 11,906 4.00 14,883 5.00 Common Equity Tier 1 Risk-based Capital 25,994 11.70 9,995 4.50 14,437 6.50 Tier 1 Risk-based Capital 25,994 11.70 13,326 6.00 17,769 8.00 Total Risk-based Capital 28,772 12.95 17,769 8.00 22,211 10.00

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Earnings Per Share	(5) Earnings Per Share Earnings per share, (“EPS”) have been computed on the basis of the weighted-average number of shares of common stock outstanding. For the three and nine months ended September 30, 2017 and 2016, outstanding stock options are considered dilutive securities for purposes of calculating diluted EPS which was computed using the treasury stock method. 2017 2016 (dollars in thousands, except per share amounts) Earnings Weighted- Per Earnings Weighted- Per Three Months Ending September 30: Basic EPS: Net earnings $ 822 3,100,309 $ 0.26 $ 610 1,985,201 $ 0.31 Effect of dilutive securities-incremental shares from assumed conversion of options 3,235 2,965 Diluted EPS: Net earnings $ 822 3,103,544 $ 0.26 $ 610 1,988,166 $ 0.31 Nine Months Ending September 30: Basic EPS: Net earnings $ 2,123 2,569,375 $ 0.83 $ 1,574 1,980,046 $ 0.79 Effect of dilutive securities-incremental shares from assumed conversion of options 9,218 9,376 Diluted EPS: Net earnings $ 2,123 2,578,593 $ 0.83 $ 1,574 1,989,422 $ 0.79

Stock Option Plans

Stock Option Plans	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Option Plans	(6) Stock Option Plans The 2015 Stock Incentive Compensation Plan (the “2015 Plan”) was approved by the Shareholders at the Company’s annual meeting of shareholders on May 20, 2015 and permits the Company to grant the Company’s 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 September 30, 2017, 11,540 stock options have been granted under the 2015 Plan. At September 30, 2017, 453,658 options are available for grant. Number Weighted- Weighted- Aggregate Outstanding at December 31, 2016 — — Options granted 11,540 $ 17.03 Outstanding at September 30, 2017 11,540 $ 17.03 4.34 years $ 6,600 Exercisable at September 30, 2017 11,540 $ 17.03 4.34 years $ 6,600 The fair value of shares vested and recognized as compensation expense was $15,000 for the nine months ended September 30, 2017. There was no share based compensation expense during the three months ended September 30, 2017 and the three and nine months ended September 30, 2016. At September 30, 2017, there was no unrecognized compensation expense related to nonvested share-based compensation arrangements granted under the 2015 Plan. The fair value of each option granted during the nine months ended September 30, 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 Stock Option Plan is as follows: Number of Weighted- Weighted- Aggregate Outstanding at December 31, 2015 75,500 $ 10.19 Options exercised (7,500 ) 11.00 Options forfeited (7,500 ) 10.00 Outstanding at September 30, 2016 60,500 $ 10.11 Outstanding at December 31, 2016 42,200 $ 10.16 Options exercised (2,600 ) 10.00 Options forfeited (200 ) 10.00 Outstanding at September 30, 2017 39,400 $ 10.17 1.68 years $ 293,000 Exercisable at September 30, 2017 38,900 $ 10.17 1.64 years $ 289,000 For the nine months ended September 30, 2017, there was no unrecognized compensation expense related to nonvested share-based compensation arrangements granted under the 2007 plan, compared to $1,000 for the nine months ended September 30, 2016. The fair value of shares vested and recognized as compensation expense was $1,000 for the nine months ended September 30, 2016, compared to less than $500 for the nine months ended September 30, 2017. The remaining expense is expected to be recognized by December 31, 2017. 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

Federal Home Loan Bank Advances

Federal Home Loan Bank Advances	9 Months Ended
	Sep. 30, 2017
Federal Home Loan Banks [Abstract]
Federal Home Loan Bank Advances	(7) Federal Home Loan Bank Advances Federal Home Loan Bank (“FHLB”) advances are collateralized by a blanket lien on qualifying residential real estate, commercial real estate, home equity lines of credit and multi-family loans. Under this blanket lien, the Company could borrow up to $25.2 million at September 30, 2017. At September 30, 2017 and December 31, 2016, the Company had no outstanding loans under this line.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	(8) Fair Value of Financial Instruments The estimated fair values and fair value measurement method with respect to the Company’s financial instruments were as follows: At September 30, 2017 At December 31, 2016 (in thousands) Level Carrying Fair Value Carrying Fair Value Financial assets: Cash and cash equivalents 1 $ 34,323 $ 34,323 $ 36,165 $ 36,165 Securities available for sale 2 48,744 48,744 33,103 33,103 Loans held for sale 3 7,459 7,716 3,291 3,500 Loans, net 3 245,160 243,574 222,768 221,320 Federal Home Loan Bank stock 3 316 316 220 220 Accrued interest receivable 3 875 875 798 798 Bank-owned life insurance 3 1,746 1,746 1,711 1,711 Financial liabilities- Deposits 3 296,714 296,883 275,347 275,433 Off Balance Sheet Items 3 — — — — Discussion regarding the assumptions used to compute the estimated fair values of financial instruments can be found in Note 1 to the consolidated financial statements included in the Company’s annual report on Form 10-K

Off-Balance Sheet Financial Ins

Off-Balance Sheet Financial Instruments	9 Months Ended
	Sep. 30, 2017
Text Block [Abstract]
Off-Balance Sheet Financial Instruments	(9) Off-Balance The Company is a party to financial instruments with off-balance-sheet interest-rate 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-sheet 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 Standby letters of credit are written conditional commitments issued by the Company to guarantee the performance of a client to a third party. These letters of credit are primarily issued to support third-party borrowing arrangements and generally have expiration dates within one year of issuance. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loans to clients. In the event the client does not perform in accordance with the terms of the agreement with the third party, we would be required to fund the commitment. The maximum potential amount of future payments we could be required to make is represented by the contractual amount of the commitment. If the commitment is funded, we would be entitled to seek recovery from the client. Some of the Company’s standby letters of credit are secured by collateral and those secured letters of credit totaled $606,000 at September 30, 2017. 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 September 30, 2017 is $64,000. The maximum potential amount of future payments we could be required to make for off-balance (in thousands) At September 30, 2017 Commitments to extend credit $ 5,519 Construction loans in process $ 9,099 Unused lines of credit $ 41,231 Standby letters of credit $ 1,697 Guaranteed accounts $ 967

Public Stock Offering

Public Stock Offering	9 Months Ended
	Sep. 30, 2017
Text Block [Abstract]
Public Stock Offering	(10) Public Stock Offering During the second quarter of 2017, the Company completed a public offering of 1,090,908 shares of the Company’s common stock at a price to the public of $16.50 per share for net proceeds to the Company of approximately $17.0 million. The Company plans to use the net proceeds to fund general corporate purposes, including maintaining liquidity and continuing support of the bank. Net proceeds may also be used for branching or acquisition opportunities in the North Florida, South Georgia, and South Alabama markets.

General (Policies)

General (Policies)	9 Months Ended
	Sep. 30, 2017
Accounting Policies [Abstract]
Comprehensive Income	Comprehensive Income. available-for-sale
Stock Based Compensation	Stock Based Compensation.
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 September 2016, the FASB issued ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326) available-for-sale In January 2017, the FASB issued ASU No. 2017-01, Business In March 2017, the FASB issued ASU No. 2017-08,

Securities Available for Sale (

Securities Available for Sale (Tables)	9 Months Ended
	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Summary of Carrying Amount and Fair Values of Securities	Securities are classified according to management’s intent. The carrying amount of securities and fair values are as follows: Amortized Gross Gross Fair Value (in thousands) At September 30, 2017 U.S. Government agency securities $ 1,252 $ 5 $ (1 ) $ 1,256 Municipal securities 12,408 170 (68 ) 12,510 Mortgage-backed securities 35,115 52 (189 ) 34,978 Total $ 48,775 $ 227 $ (258 ) $ 48,744 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
Schedule of Sale of Securities Available for Sale	The following table summarizes the sale of securities available for sale. Three Months Ended Nine Months Ended (in thousands) 2017 2016 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 gross unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous loss position, are as follows: Less Than Twelve Months Over Twelve Months Gross Fair Value Gross Fair Value (in thousands) At September 30, 2017 Securities Available for Sale U.S. Government agency securities $ (1 ) $ 701 $ — $ — Municipal securities (42 ) 2,695 (26 ) 898 Mortgage-backed securities (181 ) 21,573 (8 ) 374 Total $ (224 ) $ 24,969 $ (34 ) $ 1,272 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
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 Fair Value Quoted Prices Significant Significant (Level 3) (in thousands) At September 30, 2017 U.S. Government agency securities $ 1,256 $ — $ 1,256 $ — Municipal securities 12,510 — 12,510 — Mortgage-backed securities 34,978 — 34,978 — Total $ 48,744 $ — $ 48,744 $ — 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: At September 30, 2017 Amortized Fair Value (in thousands) Due in one to five years $ 2,976 $ 2,959 Due in five to ten years 7,899 8,048 Due after ten years 2,785 2,759 Mortgage-backed securities 35,115 34,978 Total $ 48,775 $ 48,744

Loans (Tables)

Loans (Tables)	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
Composition of Company's Loan Portfolio, Excluding Loans Held for Sale	The composition of the Company’s loan portfolio, excluding loans held for sale, was the following for the periods presented below: (in thousands) At September 30, At December 31, Real estate mortgage loans: Commercial $ 77,084 $ 65,805 Residential and home equity 94,145 88,883 Construction 23,366 19,991 Total real estate mortgage loans 194,595 174,679 Commercial loans 46,193 46,340 Consumer and other loans 6,976 4,275 Total loans 247,764 225,294 Add (deduct): Net deferred loan costs 468 350 Allowance for loan losses (3,072 ) (2,876 ) Loans, net $ 245,160 $ 222,768
Summary of Changes in Allowance for Loan Losses	An analysis of the change in allowance for loan losses follows: Real Estate Mortgage Loans (in thousands) Commercial Residential Construction Commercial Consumer Total Three-Month Period Ended September 30, 2017 Beginning balance $ 811 $ 1,108 $ 338 $ 712 $ 59 $ 3,028 Provision (credit) for loan losses 49 (18 ) (51 ) 28 24 32 Net (charge-offs) recoveries — — — 12 — 12 Ending balance $ 860 $ 1,090 $ 287 $ 752 $ 83 $ 3,072 Three-Month Period Ended September 30, 2016 Beginning balance $ 764 $ 1,017 $ 243 $ 686 $ 65 $ 2,775 Provision (credit) for loan losses 11 28 32 40 (3 ) 108 Net (charge-offs) recoveries — — — (17 ) (3 ) (20 ) Ending balance $ 775 $ 1,045 $ 275 $ 709 $ 59 $ 2,863 Nine-Month Period Ended September 30, 2017 Beginning balance $ 775 $ 1,074 $ 258 $ 714 $ 55 $ 2,876 Provision (credit) for loan losses 85 16 29 24 33 187 Net (charge-offs) recoveries — — — 14 (5 ) 9 Ending balance $ 860 $ 1,090 $ 287 $ 752 $ 83 $ 3,072 Nine-Month Period Ended September 30, 2016 Beginning balance $ 707 $ 868 $ 246 $ 596 $ 56 $ 2,473 Provision (credit) for loan losses 68 177 29 130 8 412 Net (charge-offs) recoveries — — — (17 ) (5 ) (22 ) Ending balance $ 775 $ 1,045 $ 275 $ 709 $ 59 $ 2,863 At September 30, 2017 Individually evaluated for impairment: Recorded investment $ — $ — $ — $ 137 $ — $ 137 Balance in allowance for loan losses $ — $ — $ — $ 137 $ — $ 137 Collectively evaluated for impairment: Recorded investment $ 77,084 $ 94,145 $ 23,366 $ 46,056 $ 6,976 $ 247,627 Balance in allowance for loan losses $ 860 $ 1,090 $ 287 $ 615 $ 83 $ 2,935 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 (in thousands) Commercial Residential Construction Commercial Consumer Total At September 30, 2017 Grade: Pass $ 72,027 $ 91,598 $ 22,909 $ 44,549 $ 6,948 $ 238,031 Special mention 5,057 2,381 298 1,069 28 8,833 Substandard — 166 159 575 — 900 Doubtful — — — — — — Loss — — — — — — Total $ 77,084 $ 94,145 $ 23,366 $ 46,193 $ 6,976 $ 247,764 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 loans is as follows: Accruing Loans (in thousands) 30-59 Days 60-89 Days Greater Than Total Past Current Nonaccrual Total Loans At September 30, 2017: Real estate mortgage loans: Commercial $ 626 $ — $ — $ 626 $ 76,458 $ — $ 77,084 Residential and home equity — — — — 94,145 — 94,145 Construction — — — — 23,366 — 23,366 Commercial loans — — — — 46,133 60 46,193 Consumer and other loans — — — — 6,976 — 6,976 Total $ 626 $ — $ — $ 626 $ 247,078 $ 60 $ 247,764 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 With an Allowance Recorded Total (in thousands) Recorded Unpaid Recorded Unpaid Related Recorded Unpaid Related At September 30, 2017: Commercial loans $ — $ — $ 137 $ 137 $ 137 $ 137 $ 137 $ 137 Total $ — $ — $ 137 $ 137 $ 137 $ 137 $ 137 $ 137 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 are as follows: Three Months Ended September 30, 2017 2016 (in thousands) Average Interest Interest Average Interest Interest Real estate mortage loans: Residential and home equity $ — $ 6 $ — $ 361 $ — $ — Construction 63 1 1 88 — — Commercial loans 22 — — 1 — — Consumer — — — 7 — — Total $ 85 $ 7 $ 1 $ 457 $ — $ — Nine Months Ended September 30, 2017 2016 (in thousands) Average Interest Interest Average Interest Interest Real estate mortgage loans: Residential and home equity $ 375 $ 28 $ 28 $ 119 $ — $ — Construction 66 1 2 91 — — Commercial loans 56 — — — — — Consumer — — — 3 — — Total $ 497 $ 29 $ 30 $ 213 $ — $ —
Summary of Loans Determined to be Troubled Debt Restructurings	For the nine-month period ended September 30, 2017, there was one new loan determined to be a TDR. Nine Months Ended September 30, 2017 (in thousands) Number of Pre- Post- Current Troubled Debt Restructurings - Residential and home equity: Modified principal 1 $ 153 $ 169 $ 165 Total 1 $ 153 $ 169 $ 165

Regulatory Capital (Tables)

Regulatory Capital (Tables)	9 Months Ended
	Sep. 30, 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 following table. Actual For Capital Adequacy For Well Capitalized (dollars in thousands) Amount Percentage Amount Percentage Amount Percentage As of September 30, 2017 Tier 1 Leverage Capital $ 32,345 9.38 % $ 13,791 4.00 % $ 17,238 5.00 % Common Equity Tier 1 Risk-based Capital 32,345 12.76 11,407 4.50 16,477 6.50 Tier 1 Risk-based Capital 32,345 12.76 15,210 6.00 20,280 8.00 Total Risk-based Capital 35,417 13.97 20,280 8.00 25,350 10.00 As of December 31, 2016 Tier 1 Leverage Capital 25,994 8.73 11,906 4.00 14,883 5.00 Common Equity Tier 1 Risk-based Capital 25,994 11.70 9,995 4.50 14,437 6.50 Tier 1 Risk-based Capital 25,994 11.70 13,326 6.00 17,769 8.00 Total Risk-based Capital 28,772 12.95 17,769 8.00 22,211 10.00

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 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 (dollars in thousands, except per share amounts) Earnings Weighted- Per Earnings Weighted- Per Three Months Ending September 30: Basic EPS: Net earnings $ 822 3,100,309 $ 0.26 $ 610 1,985,201 $ 0.31 Effect of dilutive securities-incremental shares from assumed conversion of options 3,235 2,965 Diluted EPS: Net earnings $ 822 3,103,544 $ 0.26 $ 610 1,988,166 $ 0.31 Nine Months Ending September 30: Basic EPS: Net earnings $ 2,123 2,569,375 $ 0.83 $ 1,574 1,980,046 $ 0.79 Effect of dilutive securities-incremental shares from assumed conversion of options 9,218 9,376 Diluted EPS: Net earnings $ 2,123 2,578,593 $ 0.83 $ 1,574 1,989,422 $ 0.79

Stock Option Plans (Tables)

Stock Option Plans (Tables)	9 Months Ended
	Sep. 30, 2017
Black-Scholes Option-Pricing Model Assumptions	The fair value of each option granted during the nine months ended September 30, 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 Stock Option Activity	A summary of the activity in the Company’s 2007 Stock Option Plan is as follows: Number of Weighted- Weighted- Aggregate Outstanding at December 31, 2015 75,500 $ 10.19 Options exercised (7,500 ) 11.00 Options forfeited (7,500 ) 10.00 Outstanding at September 30, 2016 60,500 $ 10.11 Outstanding at December 31, 2016 42,200 $ 10.16 Options exercised (2,600 ) 10.00 Options forfeited (200 ) 10.00 Outstanding at September 30, 2017 39,400 $ 10.17 1.68 years $ 293,000 Exercisable at September 30, 2017 38,900 $ 10.17 1.64 years $ 289,000
2015 Stock Incentive Compensation Plan [Member]
Summary of Stock Option Activity	Number Weighted- Weighted- Aggregate Outstanding at December 31, 2016 — — Options granted 11,540 $ 17.03 Outstanding at September 30, 2017 11,540 $ 17.03 4.34 years $ 6,600 Exercisable at September 30, 2017 11,540 $ 17.03 4.34 years $ 6,600

Fair Value of Financial Instr25

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Schedule of Carrying Amounts and Estimated Fair Values of Financial Instruments	The estimated fair values and fair value measurement method with respect to the Company’s financial instruments were as follows: At September 30, 2017 At December 31, 2016 (in thousands) Level Carrying Fair Value Carrying Fair Value Financial assets: Cash and cash equivalents 1 $ 34,323 $ 34,323 $ 36,165 $ 36,165 Securities available for sale 2 48,744 48,744 33,103 33,103 Loans held for sale 3 7,459 7,716 3,291 3,500 Loans, net 3 245,160 243,574 222,768 221,320 Federal Home Loan Bank stock 3 316 316 220 220 Accrued interest receivable 3 875 875 798 798 Bank-owned life insurance 3 1,746 1,746 1,711 1,711 Financial liabilities- Deposits 3 296,714 296,883 275,347 275,433 Off Balance Sheet Items 3 — — — —

Off-Balance Sheet Financial I26

Off-Balance Sheet Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2017
Text Block [Abstract]
Summary of Maximum Potential Amount of Future Payments	The maximum potential amount of future payments we could be required to make for off-balance (in thousands) At September 30, 2017 Commitments to extend credit $ 5,519 Construction loans in process $ 9,099 Unused lines of credit $ 41,231 Standby letters of credit $ 1,697 Guaranteed accounts $ 967

General - Additional Informatio

General - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2017Office
Accounting Policies [Abstract]
Percent of outstanding common stock owns	100.00%
Number of banking offices	3

Securities Available for Sale -

Securities Available for Sale - Summary of Carrying Amount and Fair Values of Securities (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 48,775	$ 33,473
Gross Unrealized Gains	227	129
Gross Unrealized Losses	(258)	(499)
Fair Value	48,744	33,103
US Government Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,252	2,186
Gross Unrealized Gains	5	2
Gross Unrealized Losses	(1)	(17)
Fair Value	1,256	2,171
Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	12,408	12,614
Gross Unrealized Gains	170	91
Gross Unrealized Losses	(68)	(282)
Fair Value	12,510	12,423
Mortgage-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	35,115	18,673
Gross Unrealized Gains	52	36
Gross Unrealized Losses	(189)	(200)
Fair Value	$ 34,978	$ 18,509

Securities Available for Sale29

Securities Available for Sale - Schedule of Sale of Securities Available for Sale (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 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 Sale30

Securities Available for Sale - Summary of Securities in Continuous Unrealized Loss Position (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses, Less Than Twelve Months	$ (224)	$ (490)
Fair Value, Less Than Twelve Months	24,969	20,349
Gross Unrealized Losses, Over Twelve Months	(34)	(9)
Fair Value, Over Twelve Months	1,272	501
US Government Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses, Less Than Twelve Months	(1)	(17)
Fair Value, Less Than Twelve Months	701	1,529
Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses, Less Than Twelve Months	(42)	(282)
Fair Value, Less Than Twelve Months	2,695	6,111
Gross Unrealized Losses, Over Twelve Months	(26)
Fair Value, Over Twelve Months	898
Mortgage-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses, Less Than Twelve Months	(181)	(191)
Fair Value, Less Than Twelve Months	21,573	12,709
Gross Unrealized Losses, Over Twelve Months	(8)	(9)
Fair Value, Over Twelve Months	$ 374	$ 501

Securities Available for Sale31

Securities Available for Sale - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2017USD ($)Securities	Sep. 30, 2016USD ($)	Sep. 30, 2017USD ($)Securities	Sep. 30, 2016USD ($)	Dec. 31, 2016Securities
Investments, Debt and Equity Securities [Abstract]
Number of securities in unrealized loss | Securities	23		23		24
Securities transferred in or out of Level 1, Level 2 or Level 3 | $	$ 0	$ 0	$ 0	$ 0

Securities Available for Sale32

Securities Available for Sale - Securities Available for Sale Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 48,744	$ 33,103
US Government Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	1,256	2,171
Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	12,510	12,423
Mortgage-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	34,978	18,509
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	48,744	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	1,256	2,171
Level 2 [Member] | Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	12,510	12,423
Level 2 [Member] | Mortgage-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 34,978	$ 18,509

Securities Available for Sale33

Securities Available for Sale - Scheduled Maturities of Securities with Fair Value and Amortized Cost (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Due in one to five years, Amortized cost	$ 2,976
Due in five to ten years, Amortized cost	7,899
Due after ten years, Amortized cost	2,785
Mortgage-backed securities, Amortized cost	35,115
Amortized Cost	48,775	$ 33,473
Due in one to five years, Fair value	2,959
Due in five to ten years, Fair value	8,048
Due after ten years, Fair value	2,759
Mortgage-backed securities, Fair value	34,978
Total	$ 48,744	$ 33,103

Loans - Composition of Company'

Loans - Composition of Company's Loan Portfolio, Excluding Loans Held for Sale (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 247,764		$ 225,294
Net deferred loan costs	468		350
Allowance for loan losses	(3,072)	$ (3,028)	(2,876)	$ (2,863)	$ (2,775)	$ (2,473)
Loans, net	245,160		222,768
Mortgage Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	194,595		174,679
Mortgage Receivable [Member] | Commercial Real Estate Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	77,084		65,805
Allowance for loan losses	(860)	(811)	(775)	(775)	(764)	(707)
Mortgage Receivable [Member] | Residential and Home Equity Real Estate Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	94,145		88,883
Allowance for loan losses	(1,090)	(1,108)	(1,074)	(1,045)	(1,017)	(868)
Mortgage Receivable [Member] | Construction Real Estate Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	23,366		19,991
Allowance for loan losses	(287)	(338)	(258)	(275)	(243)	(246)
Loans and Finance Receivables [Member] | Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	46,193		46,340
Allowance for loan losses	(752)	(712)	(714)	(709)	(686)	(596)
Loans and Finance Receivables [Member] | Consumer and Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	6,976		4,275
Allowance for loan losses	$ (83)	$ (59)	$ (55)	$ (59)	$ (65)	$ (56)

Loans - Summary of Changes in A

Loans - Summary of Changes in Allowance for Loan Losses (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 3,028	$ 2,775	$ 2,876	$ 2,473
Provision (credit) for loan losses	32	108	187	(412)
Net (charge-offs) recoveries	12	(20)	9	(22)
Ending balance	3,072	2,863	3,072	2,863
Individually evaluated for impairment:
Recorded investment	137		137		$ 811
Balance in allowance for loan losses	137		137		76
Collectively evaluated for impairment:
Recorded investment	247,627		247,627		224,483
Balance in allowance for loan losses	2,935		2,935		2,800
Mortgage Receivable [Member] | Commercial Real Estate Mortgage Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	811	764	775	707
Provision (credit) for loan losses	49	11	85	(68)
Ending balance	860	775	860	775
Collectively evaluated for impairment:
Recorded investment	77,084		77,084		65,805
Balance in allowance for loan losses	860		860		775
Mortgage Receivable [Member] | Residential and Home Equity Real Estate Mortgage Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	1,108	1,017	1,074	868
Provision (credit) for loan losses	(18)	28	16	(177)
Ending balance	1,090	1,045	1,090	1,045
Individually evaluated for impairment:
Recorded investment					662
Collectively evaluated for impairment:
Recorded investment	94,145		94,145		88,221
Balance in allowance for loan losses	1,090		1,090		1,074
Mortgage Receivable [Member] | Construction Real Estate Mortgage Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	338	243	258	246
Provision (credit) for loan losses	(51)	32	29	(29)
Ending balance	287	275	287	275
Individually evaluated for impairment:
Recorded investment					73
Collectively evaluated for impairment:
Recorded investment	23,366		23,366		19,918
Balance in allowance for loan losses	287		287		258
Loans and Finance Receivables [Member]
Individually evaluated for impairment:
Balance in allowance for loan losses	137		137		76
Loans and Finance Receivables [Member] | Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	712	686	714	596
Provision (credit) for loan losses	28	40	24	(130)
Net (charge-offs) recoveries	12	(17)	14	(17)
Ending balance	752	709	752	709
Individually evaluated for impairment:
Recorded investment	137		137		76
Balance in allowance for loan losses	137		137		76
Collectively evaluated for impairment:
Recorded investment	46,056		46,056		46,264
Balance in allowance for loan losses	615		615		638
Loans and Finance Receivables [Member] | Consumer and Other Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	59	65	55	56
Provision (credit) for loan losses	24	(3)	33	(8)
Net (charge-offs) recoveries		(3)	(5)	(5)
Ending balance	83	$ 59	83	$ 59
Collectively evaluated for impairment:
Recorded investment	6,976		6,976		4,275
Balance in allowance for loan losses	$ 83		$ 83		$ 55

Loans - Additional Information

Loans - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2017USD ($)SecurityLoanClassContracts	Sep. 30, 2016USD ($)Contracts	Sep. 30, 2017USD ($)SecurityLoanClassSegmentContracts	Sep. 30, 2016USD ($)Contracts	Dec. 31, 2016USD ($)
Financing Receivable, Impaired [Line Items]
Number of loan portfolio | Segment			3
Number of loan portfolio class | Class	5		5
Financing receivable, recorded investment, nonaccrual status | SecurityLoan	1		1
Nonaccrual loan	$ 60,000		$ 60,000		$ 811,000
Impaired Loans [Member] | Collateral Pledged [Member]
Financing Receivable, Impaired [Line Items]
Loans measured at fair value on a nonrecurring basis	$ 0	$ 0	0	$ 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		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	1	0
Loans identified as TDRs	$ 225,000		$ 225,000

Loans - Summary of Loan Credit

Loans - Summary of Loan Credit Quality (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	$ 247,764	$ 225,294
Mortgage Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	194,595	174,679
Mortgage Receivable [Member] | Commercial Real Estate Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	77,084	65,805
Mortgage Receivable [Member] | Residential and Home Equity Real Estate Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	94,145	88,883
Mortgage Receivable [Member] | Construction Real Estate Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	23,366	19,991
Loans and Finance Receivables [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	46,193	46,340
Loans and Finance Receivables [Member] | Consumer and Other Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	6,976	4,275
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	238,031	215,764
Pass [Member] | Mortgage Receivable [Member] | Commercial Real Estate Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	72,027	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	91,598	84,695
Pass [Member] | Mortgage Receivable [Member] | Construction Real Estate Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	22,909	19,485
Pass [Member] | Loans and Finance Receivables [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	44,549	45,623
Pass [Member] | Loans and Finance Receivables [Member] | Consumer and Other Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	6,948	4,227
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	8,833	7,852
Special Mention [Member] | Mortgage Receivable [Member] | Commercial Real Estate Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	5,057	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	2,381	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	1,069	250
Special Mention [Member] | Loans and Finance Receivables [Member] | Consumer and Other Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	28	46
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	900	1,678
Substandard [Member] | Mortgage Receivable [Member] | Residential and Home Equity Real Estate Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans by credit quality	166	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	$ 575	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	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Total Past Due	$ 626	$ 371
Current	247,078	224,112
Nonaccrual Loans	60	811
Total Loans	247,764	225,294
30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Total Past Due	626	371
Mortgage Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	194,595	174,679
Mortgage Receivable [Member] | Commercial Real Estate Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Total Past Due	626
Current	76,458	65,805
Total Loans	77,084	65,805
Mortgage Receivable [Member] | Commercial Real Estate Mortgage Loans [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing Loans Total Past Due	626
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		371
Current	94,145	87,850
Nonaccrual Loans		662
Total Loans	94,145	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] | Construction Real Estate Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	23,366	19,918
Nonaccrual Loans		73
Total Loans	23,366	19,991
Loans and Finance Receivables [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	46,133	46,264
Nonaccrual Loans	60	76
Total Loans	46,193	46,340
Loans and Finance Receivables [Member] | Consumer and Other Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	6,976	4,275
Total Loans	$ 6,976	$ 4,275

Loans - Summary of Impaired Loa

Loans - Summary of Impaired Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
With an Allowance Recorded Related Allowance	$ 137	$ 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	137	76
With an Allowance Recorded Unpaid Contractual Principal Balance	137	76
With an Allowance Recorded Related Allowance	137	76
Recorded Investment	137	811
Unpaid Contractual Principal Balance	137	811
Related Allowance	137	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	137	76
With an Allowance Recorded Unpaid Contractual Principal Balance	137	76
With an Allowance Recorded Related Allowance	137	76
Recorded Investment	137	76
Unpaid Contractual Principal Balance	137	76
Related Allowance	$ 137	$ 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	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	$ 85	$ 457	$ 497	$ 213
Interest Income Recognized	7		29
Interest Income Received	1		30
Residential and Home Equity Real Estate Mortgage Loans [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		361	375	119
Interest Income Recognized	6		28
Interest Income Received			28
Construction Real Estate Mortgage Loans [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	63	88	66	91
Interest Income Recognized	1		1
Interest Income Received	1		2
Consumer and Other Loans [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		7		$ 3
Loans and Finance Receivables [Member] | Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	$ 22	$ 1	$ 56

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	9 Months Ended
	Sep. 30, 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	$ 165
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	$ 165

Regulatory Capital - Additional

Regulatory Capital - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2017
Regulatory Capital Requirements [Abstract]
Percentage of capital conservation buffer minimum risk-based capital requirement	1.25%
Capital conservation buffer phase period	3 years

Regulatory Capital - Summary of

Regulatory Capital - Summary of Regulatory Capital Requirements and Bank's Capital Position (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Banking and Thrift [Abstract]
Tier 1 Leverage Capital, Actual amount	$ 32,345	$ 25,994
Tier 1 Leverage Capital Ratio, Actual Percentage	9.38%	8.73%
Tier 1 Leverage Capital, For Capital Adequacy Purposes, Amount	$ 13,791	$ 11,906
Tier 1 Leverage Capital Ratio, For Capital Adequacy Purposes, Percentage	4.00%	4.00%
Tier 1 Leverage Capital, For Well Capitalized Purposes, Amount	$ 17,238	$ 14,883
Tier 1 Leverage Capital Ratio, For Well Capitalized Purposes, Percentage	5.00%	5.00%
Common Equity Tier 1 Risk-Based Capital Ratio, Actual Amount	$ 32,345	$ 25,994
Common Equity Tier 1 Risk-Based Capital Ratio, Actual Percentage	12.76%	11.70%
Common Equity Tier 1 Risk-Based Capital Ratio, For Capital Adequacy Purposes, Amount	$ 11,407	$ 9,995
Common Equity Tier 1 Risk-Based Capital Ratio, For Capital Adequacy Purposes, Percentage	4.50%	4.50%
Common Equity Tier 1 Risk-Based Capital Ratio, For Well Capitalized Purposes, Amount	$ 16,477	$ 14,437
Common Equity Tier 1 Risk-Based Capital Ratio, For Well Capitalized Purposes, Percentage	6.50%	6.50%
Tier 1 Risk-Based Capital, Actual Amount	$ 32,345	$ 25,994
Tier 1 Risk-Based Capital Ratio, Actual Percentage	12.76%	11.70%
Tier 1 Risk-Based Capital, For Capital Adequacy Purposes, Amount	$ 15,210	$ 13,326
Tier 1 Risk-Based Capital Ratio, For Capital Adequacy Purposes, Percentage	6.00%	6.00%
Tier 1 Risk-Based Capital, For Well Capitalized Purposes, Amount	$ 20,280	$ 17,769
Common Equity Tier 1 Risk-Based Capital Ratio, For Well Capitalized Purposes, Percentage	8.00%	8.00%
Total Risk-Based Capital, Actual Amount	$ 35,417	$ 28,772
Total Risk-Based Capital Ratio, Actual Percentage	13.97%	12.95%
Total Risk-Based Capital, For Capital Adequacy Purposes, Amount	$ 20,280	$ 17,769
Total Risk-Based Capital Ratio, For Capital Adequacy Purposes, Percentage	8.00%	8.00%
Total Risk-Based Capital, For Well Capitalized Purposes, Amount	$ 25,350	$ 22,211
Total Risk-Based Capital Ratio, 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	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
Earnings	$ 822	$ 610	$ 2,123	$ 1,574
Earnings	$ 822	$ 610	$ 2,123	$ 1,574
Weighted-Average Shares	3,100,309	1,985,201	2,569,375	1,980,046
Effect of dilutive securities-incremental shares from assumed conversion of options	3,235	2,965	9,218	9,376
Weighted-Average Shares	3,103,544	1,988,166	2,578,593	1,989,422
Per Share Amount	$ 0.26	$ 0.31	$ 0.83	$ 0.79
Per Share Amount	$ 0.26	$ 0.31	$ 0.83	$ 0.79

Stock Option Plans - Additional

Stock Option Plans - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 0	$ 0	$ 15,000	$ 0
Common stock issued as compensation to directors, value			$ 51,000	$ 40,000
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		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	453,658		453,658
Unrecognized compensation expense related to nonvested share-based compensation arrangements granted	$ 0		$ 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		74,805
Shares granted	939	1,014	3,104	2,857
Shares available for grant	58,910		58,910
Stock consideration on percentage of common stock received upon cash fees	110.00%		110.00%
Common stock issued as compensation to directors, value	$ 16,000	$ 15,000	$ 51,000	$ 40,000
2007 Stock Incentive Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense			500	1,000
2007 Stock Incentive Compensation Plan [Member] | Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to nonvested share-based compensation arrangements granted	$ 0	$ 1,000	$ 0	$ 1,000

Stock Option Plans - Summary of

Stock Option Plans - Summary of Stock Option Activity (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 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 4 months 2 days
Weighted-Average Remaining Contractual Term, Exercisable	4 years 4 months 2 days
Aggregate Intrinsic Value, Outstanding			$ 6,600
Aggregate Intrinsic Value, Exercisable			$ 6,600
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	(2,600)	(7,500)
Weighted-Average Exercise Price, Outstanding beginning balance	$ 10.17	$ 10.11	$ 10.17
Number of Options, forfeited	(200)	(7,500)
Number of Options, Outstanding ending balance	39,400	60,500
Number of Options, Exercisable ending balance			38,900
Weighted-Average Exercise Price, Outstanding beginning balance	$ 10.16	$ 10.19
Weighted-Average Exercise Price, Options exercised	10	11
Weighted-Average Exercise Price, Options forfeited	10	10
Weighted-Average Exercise Price, Outstanding ending balance	$ 10.17	$ 10.11
Weighted-Average Exercise Price, Exercisable			$ 10.17
Weighted-Average Remaining Contractual Term, Outstanding	1 year 8 months 5 days
Weighted-Average Remaining Contractual Term, Exercisable	1 year 7 months 21 days
Aggregate Intrinsic Value, Outstanding			$ 293,000
Aggregate Intrinsic Value, Exercisable			$ 289,000

Stock Option Plans - Black-Scho

Stock Option Plans - Black-Scholes Option-Pricing Model Assumptions (Detail)	Feb. 01, 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

Federal Home Loan Bank Advanc48

Federal Home Loan Bank Advances - Additional Information (Detail) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Advances from Federal Home Loan Banks [Abstract]
Maximum borrowing capacity under FHLB	$ 25,200,000
Outstanding advances under FHLB	$ 0	$ 0

Fair Value of Financial Instr49

Fair Value of Financial Instruments - Schedule of Carrying Amounts and Estimated Fair Values of Financial Instruments (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 34,323	$ 36,165	$ 23,077	$ 8,429
Securities available for sale	48,744	33,103
Loans held for sale	7,459	3,291
Loans, net	245,160	222,768
Federal Home Loan Bank stock	316	220
Accrued interest receivable	875	798
Bank-owned life insurance	1,746	1,711
Deposits	296,714	275,347
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	48,744	33,103
Estimated Fair Value [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	34,323	36,165
Estimated Fair Value [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	48,744	33,103
Estimated Fair Value [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held for sale	7,716	3,500
Loans, net	243,574	221,320
Federal Home Loan Bank stock	316	220
Accrued interest receivable	875	798
Bank-owned life insurance	1,746	1,711
Deposits	296,883	275,433
Off Balance Sheet Items	0	0
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	34,323	36,165
Securities available for sale	48,744	33,103
Loans held for sale	7,459	3,291
Loans, net	245,160	222,768
Federal Home Loan Bank stock	316	220
Accrued interest receivable	875	798
Bank-owned life insurance	1,746	1,711
Deposits	296,714	275,347
Off Balance Sheet Items	$ 0	$ 0

Off-Balance-Sheet Financial Ins

Off-Balance-Sheet Financial Instruments - Additional Information (Detail)	9 Months Ended
	Sep. 30, 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	$ 606,000
Contractual amounts with off-balance-sheet risk	$ 1,697,000
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	$ 64,000
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 I51

Off-Balance-Sheet Financial Instruments - Summary of Maximum Potential Amount of Future Payments (Detail)	9 Months Ended
	Sep. 30, 2017USD ($)
Commitments to Extend Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts with off-balance-sheet risk	$ 5,519,000
Construction Loans in Process [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts with off-balance-sheet risk	9,099,000
Unused Lines of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts with off-balance-sheet risk	41,231,000
Standby Financial Letters of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts with off-balance-sheet risk	1,697,000
Guarantee Accounts [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts with off-balance-sheet risk	$ 967,000

Public Stock Offering - Additio

Public Stock Offering - Additional Information (Detail) $ / shares in Units, $ in Millions	3 Months Ended
	Jun. 30, 2017USD ($)$ / sharesshares
Equity [Abstract]
Common shares issued, shares | shares	1,090,908
Common shares issued, price per share | $ / shares	$ 16.50
Common shares issued, value | $	$ 17