OP Bancorp (OPBK) 10-Q 15 May 18 2018 Q1 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2018	May 15, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Trading Symbol	OPBK
Entity Registrant Name	OP Bancorp
Entity Central Index Key	1,722,010
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		15,569,215

CONSOLIDATED BALANCE SHEETS (un

CONSOLIDATED BALANCE SHEETS (unaudited) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
ASSETS
Cash and cash equivalents	$ 69,899,816	$ 63,249,952
Securities available for sale, at fair value	36,864,511	41,471,711
Other investments	6,818,556	4,286,500
Loans held for sale	18,570,944	15,739,305
Loans receivable, net of allowance of $9,716,168 at March 31, 2018 and $9,139,488 at December 31, 2017	784,034,862	738,884,413
Premises and equipment, net	4,707,461	4,480,792
Accrued interest receivable	2,503,721	2,463,486
Servicing assets	6,724,800	6,771,097
Company owned life insurance	11,165,374	11,089,718
Deferred tax assets	4,003,290	3,383,365
Other assets	11,549,122	9,178,491
Total assets	956,842,457	900,998,830
Deposits:
Noninterest bearing	289,011,579	289,409,876
Interest bearing:
Savings	3,913,735	3,838,353
Money market and others	261,506,359	247,324,292
Time deposits greater than $250,000	124,637,331	108,952,059
Other time deposits	139,210,714	123,781,434
Total deposits	818,279,718	773,306,014
Federal Home Loan Bank advances	10,000,000	25,000,000
Accrued interest payable	557,559	423,239
Other liabilities	10,745,257	10,789,627
Total liabilities	839,582,534	809,518,880
Shareholders’ equity
Preferred stock – no par value; 10,000,000 shares authorized; no shares issued or outstanding at March 31, 2018 and December 31, 2017
Common stock – no par value; 50,000,000 shares authorized; 15,530,527 and 13,190,527 shares issued and outstanding at March 31, 2018 and December 31, 2017, respectively	90,676,860	67,925,860
Additional paid-in capital	5,525,959	5,279,991
Retained earnings	21,839,887	18,623,952
Accumulated other comprehensive loss	(782,783)	(349,853)
Total shareholders’ equity	117,259,923	91,479,950
Total liabilities and shareholders' equity	$ 956,842,457	$ 900,998,830

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) (Unaudited) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Statement Of Financial Position [Abstract]
Loans receivable, allowance	$ 9,716,168	$ 9,139,488
Cash, FDIC insured amount	$ 250,000	$ 250,000
Preferred stock, par value
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares, issued	15,530,527	13,190,527
Common stock, shares, outstanding	15,530,527	13,190,527

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Interest income
Interest and fees on loans	$ 10,847,816	$ 8,929,183
Interest on investment securities	201,516	143,610
Other interest income	130,899	112,240
Total interest income	11,180,231	9,185,033
Interest expense
Interest on deposits	1,533,716	971,206
Interest on borrowed funds	87,546	7,098
Total interest expense	1,621,262	978,304
Net interest income	9,558,969	8,206,729
Provision for loan losses	575,180	541,083
Net interest income after provision for loan losses	8,983,789	7,665,646
Noninterest income
Service charges on deposits	537,445	419,735
Loan servicing fees, net of amortization	323,771	366,215
Gain on sale of loans	988,913	1,192,914
Other income	362,191	264,955
Total noninterest income	2,212,320	2,243,819
Noninterest expense
Salaries and employee benefits	4,210,811	4,023,652
Occupancy and equipment	1,025,692	963,453
Data processing and communication	330,873	331,174
Professional fees	152,100	140,500
FDIC insurance and regulatory assessments	95,627	99,843
Promotion and advertising	145,349	145,682
Directors’ fees	208,887	194,521
Foundation donation and other contributions	329,000	215,300
Other expenses	312,512	274,467
Total noninterest expense	6,810,851	6,388,592
Income before income taxes	4,385,258	3,520,873
Income tax expense	1,169,323	1,375,186
Net income	$ 3,215,935	$ 2,145,687
Earnings per share - Basic	$ 0.23	$ 0.16
Earnings per share - Diluted	$ 0.22	$ 0.15
Other comprehensive loss:
Change in unrealized loss on securities available for sale	$ (507,616)	$ (31,102)
Less tax effect	(74,686)	(12,799)
Total other comprehensive loss	(432,930)	(18,303)
Comprehensive income	$ 2,783,005	$ 2,127,384

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (unaudited) - USD ($)	Total	Common Stock	Additional Paid-in Capital	Retained Earnings / (Accumulated Deficit)	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2016	$ 81,283,787	$ 67,499,310	$ 4,611,973	$ 9,387,470	$ (214,966)
Beginning balance, shares at Dec. 31, 2016		12,896,548
Net income	2,145,687			2,145,687
Stock issued under stock-based compensation plans	190,250	$ 190,250
Stock issued under stock-based compensation plans, shares		92,680
Stock-based compensation	179,289		179,289
Change in unrealized loss on securities available for sale net of reclassifications and tax effects	(18,304)				(18,304)
Ending balance at Mar. 31, 2017	83,780,709	$ 67,689,560	4,791,262	11,533,157	(233,270)
Ending balance, shares at Mar. 31, 2017		12,989,228
Beginning balance at Dec. 31, 2017	91,479,950	$ 67,925,860	5,279,991	18,623,952	(349,853)
Beginning balance, shares at Dec. 31, 2017		13,190,527
Net income	3,215,935			3,215,935
Stock issued under stock offering, net of expenses	22,637,000	$ 22,637,000
Stock issued under stock offering, net of expenses, shares		2,300,000
Stock issued under stock-based compensation plans	114,000	$ 114,000
Stock issued under stock-based compensation plans, shares		40,000
Stock-based compensation	245,968		245,968
Change in unrealized loss on securities available for sale net of reclassifications and tax effects	(432,930)				(432,930)
Ending balance at Mar. 31, 2018	$ 117,259,923	$ 90,676,860	$ 5,525,959	$ 21,839,887	$ (782,783)
Ending balance, shares at Mar. 31, 2018		15,530,527

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities
Net income	$ 3,215,935	$ 2,145,687
Adjustments to reconcile net income to net cash and cash equivalents provided by operating activities:
Provision for loan losses	575,180	541,083
Depreciation and amortization of premises and equipment	240,416	263,793
Amortization of net premiums on securities	61,137	83,672
Stock-based compensation	245,968	179,289
Gain on sales of loans	(988,913)	(1,192,914)
Earnings on company owned life insurance	(75,656)	(79,137)
Origination of loans held for sale	(16,818,745)	(16,488,211)
Proceeds from sales of loans held for sale	14,598,457	17,922,971
Amortization of servicing assets	423,859	379,296
Accrued interest receivable	(40,235)	(41,248)
Other assets	(2,915,870)	1,306,291
Accrued interest payable	134,320	54,956
Other liabilities	(44,370)	(2,878,051)
Net cash from operating activities	(1,388,517)	2,197,477
Cash flows from investing activities
Net change in loans receivable	(45,725,629)	(7,781,371)
Proceeds from calls of securities available for sale	1,519,949	1,598,833
Purchase of premises and equipment, net	(467,085)	(19,381)
Purchase of other investments	(13,558)
Net cash from investing activities	(44,686,323)	(6,201,919)
Cash flows from financing activities
Net change in deposits	44,973,704	49,263,338
Cash received from stock option exercises	114,000	190,250
Borrowings/(Repayment) of Federal Home Loan Bank advances	(15,000,000)	(10,000,000)
Issuance of common stock, net of expenses	22,637,000
Net cash from financing activities	52,724,704	39,453,588
Net change in cash and cash equivalents	6,649,864	35,449,146
Cash and cash equivalents at beginning of period	63,249,952	20,126,028
Cash and cash equivalents at end of period	69,899,816	55,575,174
Supplemental cash flow information
Income taxes		2,120,000
Interest	$ 1,486,942	$ 923,348

Business Description

Business Description	3 Months Ended
	Mar. 31, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Business Description	Note 1. Business Description OP Bancorp (the “Company”) is a California corporation whose common stock is quoted on the Nasdaq Global Market under the ticker symbol, “OPBK.” The Company was formed to acquire 100% of the voting equity of Open Bank (the “Bank”) and commenced operation as a bank holding company on June 1, 2016. This transaction was treated as an internal reorganization as all shareholders of the Bank became shareholders of the Company. The Company has no operations other than ownership of the Bank. The Bank is a California state-chartered and FDIC-insured financial institution, which began its operations on June 10, 2005. Headquartered in downtown Los Angeles, California, the Company operates primarily in the traditional banking business arena that includes accepting deposits and making loans and investments. The Company’s primary deposit products are demand and time deposits, and the primary lending products are commercial business loans to small to medium sized businesses. The Company is operating with eight full service branches in Downtown Los Angeles, Los Angeles Fashion District, Los Anageles Koreatown, Gardena, Buena Park and Santa Clara. The Company also has three loan production offices in Seattle, Washington, Dallas, Texas, and Atlanta, Georgia. On March 27, 2018, the Company completed its initial public offering of common stock, pursuant to which we sold an aggregate of 2,300,000 shares of our common stock at a public offering price of $11.00 per share, for aggregate net proceeds of approximately $22.6 million, after deducting underwriter discounts and commissions paid by us of approximately $1.7 million and other offering expenses of approximately $925,000. There has been no material change in the planned use of proceeds from our initial public offering as described in our Prospectus.

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Note 2. Summary of Significant Accounting Policies The following is a summary of certain of the Company’s significant accounting and reporting policies. Basis of Presentation: The accompanying unaudited consolidated financial statements and notes thereto of the Company have been prepared in accordance with the rules and regulations of the Securities and Exchange Commission (“SEC”) for Form 10-Q and conform to practices within the banking industry and include all of the information and disclosures required by accounting principles generally accepted in the United States of America (“GAAP”) for interim financial reporting. The accompanying unaudited consolidated financial statements reflect all adjustments (consisting only of normal recurring adjustments), which are necessary for a fair presentation of financial results for the interim periods presented. The results of operations for the interim periods are not necessarily indicative of the results for the full year. These interim unaudited financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto as of and for the year ended December 31, 2017, included in our registration statement on Form S-1 (333-223444) filed with the SEC on March 5, 2018 and declared effective on March 27, 2018. Use of Estimates: To prepare financial statements in conformity with GAAP, management makes estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the financial statements and the disclosures provided, and actual results could differ. Concentration of Risk: Most of the Company’s customers are located within Los Angeles County and the surrounding area. The concentration of loans originated in this area may subject the Company to the risk of adverse impacts of economic, regulatory or other developments that could occur in Southern California. The Company has significant concentration in commercial real estate loans. The Company obtains what it believes to be sufficient collateral to secure potential losses. The extent and value of the collateral obtained varies based upon the details underlying each loan agreement. Cash Flows: Cash and cash equivalents include cash, deposits with other financial institutions with original maturities less than 90 days, and federal funds sold. Net cash flows are reported for customer loan and deposit transactions and Federal Home Loan Bank advances transactions. Securities: Securities are classified as held to maturity and carried at amortized cost when management has the positive intent and ability to hold them to maturity. Securities are classified as available for sale when they might be sold before maturity. Securities available for sale are carried at fair value, with unrealized holding gains and losses reported in other comprehensive income, net of tax. Interest income includes amortization of purchase premium or discount. Premiums and discounts on securities are amortized on the level-yield method without anticipating prepayments. Gains and losses on sales are recorded on the trade date and determined using the specific identification method. Management evaluates securities for other-than-temporary impairment (“OTTI”) on at least a quarterly basis, and more frequently when economic or market conditions warrant such an evaluation. For securities in an unrealized loss position, management considers the extent and duration of the unrealized loss, and the financial condition and near-term prospects of the issuer. Management also assesses whether it intends to sell, or it is more likely than not that it will be required to sell, a security in an unrealized loss position before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the entire difference between amortized cost and fair value is recognized as impairment through earnings. For debt securities that do not meet the aforementioned criteria, the amount of impairment is split into two components as follows: 1) OTTI related to credit loss, which must be recognized in the income statement, and 2) OTTI related to other factors, which is recognized in other comprehensive income. The credit loss is defined as the difference between the present value of the cash flows expected to be collected and the amortized cost basis. Other investments: Other investments includes the followings : (i) Federal Home Loan Bank (“FHLB”) Stock - the Bank is a member of the FHLB system. Members are required to own a certain amount of stock based on the level of borrowings and other factors, and may invest in additional amounts. FHLB stock is carried at cost, classified as a restricted security, and periodically evaluated for impairment based on ultimate recovery of par value. Both cash and stock dividends are reported as income; (ii) Pacific Coast Bankers Bank (“PCBB”) Stock - the Bank is a member of PCBB. PCBB stock is carried at cost, classified as a restricted security, and periodically evaluated for impairment based on ultimate recovery of par value. Both cash and stock dividends are reported as income; and (iii) the Company’s investment in a mutual fund to satisfy the Company’s requirements under the Community Reinvestment Act (“CRA”). CRA mutual fund is reported at fair value. Unrealized gains and losses are recognized in earnings. Loans Held for Sale: Certain Small Business Administration (“SBA”) loans that may be sold prior to maturity are designated as held for sale at origination and are recorded at the lower of their cost or fair value less costs to sell, determined on an aggregate basis. A valuation allowance is established if the market value of such loans is lower than their cost, and operations are charged or credited for valuation adjustments. Origination fees on loans held for sale, net of certain costs of processing and closing the loans, are deferred until the time of sale and are included in the computation of the gain or loss from the sales of the related loans. A portion of the premium on sale of SBA loans is recognized as gains on sales of loans at the time of the sale. These loans are generally sold with servicing retained. Loans Receivable: Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at the principal balance outstanding, net of deferred loan fees and costs and an allowance for loan losses. Interest income is accrued on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, are deferred and recognized in interest income using the level-yield method without anticipating prepayments. The recorded investment in loans includes accrued interest receivable, deferred loan fees and costs, and unearned income. The accrual of interest income on commercial real estate and other commercial and industrial loans is discontinued at the time the loan is 90 days delinquent unless the loan is well-secured and in process of collection. Consumer loans are typically charged off no later than 120 days past due. Past due status is based on the contractual terms of the loan. In all cases, loans are placed on nonaccrual status or charged-off at an earlier date if collection of principal or interest is considered doubtful. Nonaccrual loans and loans past due 90 days still on accrual include both smaller balance homogeneous loans that are collectively evaluated for impairment and individually classified impaired loans. All interest accrued but not received for loans placed on nonaccrual status is reversed against interest income. Interest received on such 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 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 a valuation allowance for probable incurred credit losses. Loan losses are charged against the allowance when management believes the uncollectibility of a loan balance is confirmed. Subsequent recoveries, if any, are credited to the allowance. Management estimates the allowance balance required using past loan loss experience, the nature and volume of the portfolio, information about specific borrower situations and estimated collateral values, economic conditions, and other factors. Allocations of the allowance may be made for specific loans, but the entire allowance is available for any loan that in management’s judgment should be charged off. The allowance consists of specific and general components. The specific component relates to loans that are individually classified as impaired. A loan is impaired when, based on current information and events, it is probable that the Company will be unable to collect all amounts due according to the contractual terms of the loan agreement. Loans for which the terms have been modified resulting in a concession, and for which the borrower is experiencing financial difficulties, are considered troubled debt restructurings and classified as impaired. Troubled debt restructurings are separately identified for impairment disclosures and are measured at the present value of estimated future cash flows using the loan’s effective rate at inception. If a troubled debt restructuring is considered to be a collateral dependent loan, the loan is reported, net, at the fair value of the collateral. For troubled debt restructurings that subsequently default, the Company determines the amount of reserve in accordance with the accounting policy for the allowance for loan losses. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed. Impairment is measured on a loan-by-loan basis for commercial real estate and construction loans. Large groups of smaller balance homogeneous loans are collectively evaluated for impairment. Income recognition on impaired loans materially conforms to the method the Company uses for income recognition on nonaccrual loans. Allowance for impaired loans is determined based on the present value of the estimated cash flows or on the fair value of the collateral if the loan is collateral dependent, less costs to sell. If the measured fair value is less than the recorded investment in the loan, the deficiency will be charged off against the allowance for loan losses, or alternatively, a specific allocation will be established. For consumer loans, management will generally charge off the balance if the loan is 90 days or more past due. The general component of the allowance covers non-impaired loans and is based on historical loss experience adjusted for current factors. The historical loss experience is determined by portfolio segment and is based on the actual loss history experienced by the Company over the most recent two years. For those portfolio segments that the Company does not have sufficient historical data available to track the loss migration, the loss factors are based on the actual loss history experienced by the Company over the most recent five years. This actual loss experience is supplemented with other economic factors based on the risks present for each portfolio segment. These economic factors include consideration of the following: levels of and trends in delinquencies and impaired loans; levels of and trends in charge-offs and recoveries; trends in volume and terms of loans; effects of any changes in risk selection and underwriting standards; other changes in lending policies, procedures, and practices; experience, ability, and depth of lending management and other relevant staff; national and local economic trends and conditions; industry conditions; and effects of changes in credit concentrations. Related to the current national and local economic conditions, the Company has considered risk factors including the broad deterioration of property values, reduced consumer and business spending as a result of high unemployment and reduced credit availability, and the lack of confidence in a sustainable recovery. The following portfolio segments have been identified in the Company’s loan portfolio, and are also representative of the classes within the portfolio: commercial real estate, SBA loans—real estate, SBA loans—non-real estate, commercial and industrial, home mortgage, and consumer. The Company reviews the credit risk exposure of all its portfolio segments by internally assigned grades. The Company categorizes loans into risk grades 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. For the home mortgage and consumer portfolio segments, the Company’s primary monitoring tool is reviewing past due listings to determine if the loans are performing. The determination of the allowance for loan losses is based on estimates that are particularly susceptible to changes in the economic environment and market conditions. Management believes that as of March 31, 2018 and December 31, 2017 the allowance for loan losses is adequate based on information currently available. If a deterioration in the economy of the Company’s principal market area occurs, the Company’s loan portfolios could be adversely impacted and higher charge-offs and increases in non-performing assets could result. Such an adverse impact could also require a larger allowance for loan losses. Servicing Assets: When SBA loans are sold with servicing retained, servicing assets are initially recorded at fair value with the income statement effect recorded in gains on sales of loans. Fair value is based on a valuation model that calculates the present value of estimated future net servicing income. The valuation model incorporates assumptions that market participants would use in estimating future net servicing income, such as the cost to service, the discount rate, prepayment speeds, and default rates and losses. The Company compares the valuation model inputs and results to published industry data in order to validate the model results and assumptions. Servicing assets are subsequently measured using the amortization method which requires servicing assets to be amortized into noninterest income in proportion to, and over the period of, the estimated future net servicing income of the underlying loans. Servicing assets are evaluated for impairment based upon the fair value of the assets as compared to their carrying amount. Impairment is recognized through a valuation allowance to the extent that fair value is less than the carrying amount. If the Company later determines that all or a portion of the impairment no longer exists, a reduction of the valuation allowance may be recorded as an increase to income. Changes in the valuation allowances are reported with other income on the income statement. The fair values of servicing rights are subject to fluctuations as a result of changes in estimated and actual prepayment speeds, default rates, and losses. Servicing fee income, which is reported on the income statement as other income, is recorded for fees earned for servicing loans. The fees are based on a contractual percentage of the outstanding principal and are recorded as income when earned. The amortization of servicing assets is netted against loan servicing fee income. Late fees and ancillary fees related to loan servicing are not material. Company Owned Life Insurance: The Company has purchased life insurance policies on certain key executives. Company owned life insurance is recorded at the amount that can be realized under the insurance contract at the balance sheet date, which is the cash surrender value adjusted for other charges or other amounts due that are probable at settlement. Transfers of Financial Assets: Transfers of financial assets are accounted for as sales when control over the assets has been relinquished. Control over transferred assets is deemed to be surrendered when the assets have been isolated from the Company, the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets, and the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity. Premises and Equipment: Premises and equipment are stated at cost, less accumulated depreciation. Equipment and furnishings are depreciated over 3 to 10 years, and leasehold improvements are amortized over the lesser of the terms of the respective leases or the estimated useful lives. The straight-line method of depreciation is used for financial reporting purposes. Repairs and maintenance are charged to operating expenses as incurred. Other Real Estate Owned, Net: Assets acquired through or instead of loan foreclosure are initially recorded at fair value less costs to sell when acquired, establishing a new cost basis. Physical possession of residential real estate property collateralizing a consumer mortgage loan occurs when the legal title is obtained upon completion of foreclosure or when the borrower conveys all interest in the property to satisfy the loan through the completion of a deed in lieu of foreclosure or through a similar legal agreement. These assets are subsequently accounted for at the lower of their cost or fair value less estimated costs to sell. If their fair value declines subsequent to foreclosure, a valuation allowance is recorded through expense. Operating costs after acquisition are expensed. Loan Commitments and Related Financial Instruments: Financial instruments include off-balance sheet credit instruments, such as commitments to make loans and commercial letters of credit, issued to meet customer financing needs. The face amount for these items represents the exposure to loss, before considering customer collateral or ability to repay. Such financial instruments are recorded when they are funded. Stock-Based Compensation: Compensation cost is recognized for stock options and restricted stock awards issued to employees based on the fair value of the awards at the date of grant. A Black-Scholes model is utilized to estimate the fair value of stock options, while the market price of the Company’s common stock at the date of the grant is used for restricted stock awards. Compensation cost is recognized over the required service period, generally defined as the vesting period. For awards with graded vesting, compensation cost is recognized on a straight-line basis over the requisite service period for the entire award. Earnings per Common Share: Basic and diluted earnings per share is based on the two-class method prescribed in ASC Topic 260, Earnings Per Share (ASC 260). Stock options and restricted stock awards are considered outstanding for this calculation unless unearned. Diluted earnings per common share includes the dilutive effect of additional potential common shares issuable under stock-based compensation plans. Earnings and dividends per share are restated for all stock splits and stock dividends through the date of issuance of the financial statements. Income Taxes: Income tax expense is the total of the current year income tax due or refundable and the change in deferred tax assets and liabilities. Deferred tax assets and liabilities are the expected future tax amounts for the temporary differences between carrying amounts and tax bases of assets and liabilities, computed using enacted tax rates. A valuation allowance, if needed, reduces deferred tax assets to the amount expected to be realized. A tax position is recognized as a benefit only if it is “more likely than not” that the tax position would be sustained in a tax examination, with a tax examination being presumed to occur. The amount recognized is the largest amount of tax benefit that is greater than 50% likely of being realized on examination. For tax positions not meeting the “more likely than not” test, no tax benefit is recorded. The Company does not expect the total amount of unrecognized tax benefits to significantly increase or decrease in the next twelve months. The Company recognizes interest and/or penalties related to income tax matters in income tax expense. There were no interest or penalties recognized in the three months ended March 31, 2018 or 2017. Comprehensive Income/(Loss): Comprehensive income/(loss) consists of net income and other comprehensive income. Other comprehensive income includes unrealized gains and losses on securities available for sale, which are also recognized as separate components of shareholders’ equity, net of tax. Loss Contingencies: Loss contingencies, including claims and legal actions arising in the ordinary course of business, are recorded as liabilities when the likelihood of loss is probable and an amount or range of loss can be reasonably estimated. Management does not believe there now are such matters that will have a material effect on the financial statements. Fair Value of Financial Instruments: Fair values of financial instruments are estimated using relevant market information and other assumptions, as more fully disclosed in Note 13—Fair Value of Financial Instruments. Fair value estimates involve uncertainties and matters of significant judgment regarding interest rates, credit risk, prepayments, and other factors, especially in the absence of broad markets for particular items. Changes in assumptions or in market conditions could significantly affect these estimates. Operating Segments: While the chief decision-makers monitor the revenue streams of the various products and services, operations are managed and financial performance is evaluated on a Company-wide basis. Discrete financial information is not available other than on a Company-wide basis. Reclassifications: Some items in the prior period financial statements were reclassified to conform to the current presentation. Reclassification had no effect on prior year net income or shareholders’ equity. Recent Accounting Pronouncements: In May 2014, the Financial Accounting Standard Board (FASB) issued Accounting Standard Update (ASU) 2014-9 (ASU 2014-09), Revenue from Contracts with Customers. The core principle of ASU 2014-09 is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance also specifies the accounting for some costs to obtain or fulfill a contract with a customer, as well as enhanced disclosure requirements. In August 2015, the FASB issued ASU 2015-14 which deferred the effective date of ASU 2014-09 to fiscal years, and interim reporting periods within those fiscal years, beginning after December 15, 2017. In March 2016, the FASB issued ASU 2016-08 which clarified the revenue recognition implementation guidance on principal versus agent considerations and is effective during the same period as ASU 2014-09. In April 2016, the FASB issued ASU 2016-10 which clarified the revenue recognition guidance regarding the identification of performance obligations and the licensing implementation and is effective during the same period as ASU 2014-09. In May 2016, the FASB issued ASU 2016-12 which narrowly amended the revenue recognition guidance regarding collectability, noncash consideration, presentation of sales tax and transition. ASU 2016-12 is effective during the same period as ASU 2014-09. The majority of the Company’s revenue consists of net interest income on financial assets and financial liabilities, which is explicitly excluded from the scope of ASU 2014-09. The Company adopted the new standard beginning January 1, 2018. The Company completed its analysis for determining the extent ASU 2014-09 will affect its noninterest income, primarily in the area of fees and service charges on deposit accounts and trade finance activities. Based on the analysis performed, the Company did not have a material change in the timing or measurement of revenues related to noninterest income. This guidance did not have a material impact on the Company’s consolidated financial statements. See Note 12. Revenue Recognition for further details. Effective January 2018, the Company adopted ASU 2016-01, Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities (ASU 2016-01). The main objective of ASU 2016-01 is to enhance the reporting model for financial instruments to provide users of financial statements with more decision-useful information. ASU 2016-01 addresses certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. Some of the amendments in ASU 2016-01 include the following: 1) Require equity investments (except those accounted for under the equity method of accounting or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income; 2) Simplify the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment; 3) Require public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; and 4) Require an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value. For public business entities, the amendments of ASU 2016-01 are effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The adoption of ASU 2016-01 resulted in a transfer of $2.5 million of mutual funds from securities available for sale to other investments on the consolidted balance sheet. However, this standard did not have a material impact on the consolidated financial statements. See Note 13 for fair value measurement disclosures. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) (ASU 2016-02). ASU 2016-02 is intended to increase transparency and comparability among organizations by recognizing lease assets and liabilities on the balance sheet and disclosing key information about lease arrangements. This ASU is effective for annual periods and interim periods within those annual periods beginning after December 15, 2018. Based on leases outstanding at March 31, 2018, the Company does not expect this ASU to have a material impact on the income statement, but does anticipate a $12 million increase in assets and liabilities once this ASU becomes effective. In June 2016, the FASB issued ASU 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (ASU 2016-13). The objective of ASU 2016-13 is to provide financial statement users with decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit. ASU 2016-13 includes provisions that require financial assets measured at amortized cost (such as loans and held to maturity (HTM) debt securities) to be presented at the net amount expected to be collected. This will be accomplished through recognition of an estimate of all current expected credit losses. The estimate will include forecasted information for the timeframe that an entity is able to develop reasonable and supportable forecasts. This is a change from the current practice of recognizing incurred losses based on the probable initial recognition threshold under current GAAP. In addition, credit losses on available for sale (AFS) debt securities will be recorded through an allowance for credit losses rather than as a write-down. Under ASU 2016-13, an entity will be able to record reversals of credit losses in current period income when the estimate of credit losses declines, whereas current GAAP prohibits reflecting those improvements in current period earnings. ASU 2016-13 is effective for annual periods and interim periods within those annual periods beginning after December 15, 2019, and early adoption is permitted for fiscal years, including interim periods, beginning after December 15, 2018. ASU 2016-13 will be applied through a cumulative effect adjustment to retained earnings (modified-retrospective approach), except for debt securities for which an other-than-temporary impairment had been recognized before the effective date. A prospective transition approach is required for these debt securities. The Company is currently evaluating the effects of ASU 2016-13 on its financial statements and disclosures, including software solutions, data requirements and loss estimation methodologies. While the effects cannot yet be quantified, the Company expects ASU 2016-13 to add complexity and costs to its current credit loss evaluation process. In March 2017, the FASB issued ASU 2017-08, Receivables—Nonrefundable Fees and Other Costs (Subtopic 310-20) (ASU 2017-08). ASU 2017-08 amends the amortization period for certain purchased callable debt securities held at a premium. Prior to the issuance of this guidance, premiums were amortized as an adjustment of yield over the contractual life of the instrument. ASU 2017-08 requires premiums on purchased callable debt securities that have explicit, noncontingent call features that are callable at fixed prices to be amortized to the earliest call date. There are no accounting changes for securities held at a discount. This ASU is effective for annual periods and interim periods within those annual periods beginning after December 15, 2018, and early adoption is permitted. ASU 2017-08 will be applied through a cumulative effect adjustment through equity (modified-retrospective approach). The Company is currently evaluating the effects of ASU 2017-08 on its financial statements and disclosures. In May 2017, the FASB issued ASU 2017-09, Compensation—Stock Compensation (Topic 718), Scope of Modification Accounting (ASU 2017-09). ASU 2017-09 clarifies when changes to the terms and conditions of share-based payment awards must be treated as modifications. Specifically, the new guidance permits companies to make certain changes to awards without accounting for them as modifications. ASU 2017-09 is effective for annual periods beginning after December 31, 2017 and will be applied prospectively to an award modified after the effective date. There have been no changes to the terms and conditions of share-based payment awards, and as a result the adoption of this standard did not have a material effect on the Company’s operating results or financial condition. In February 2018, the FASB issued ASU No. 2018-02, “Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.” This ASU permits a reclassification from accumulated other comprehensive income (“AOCI”) to retained earnings for stranded tax effects resulting from the Tax Act. The Company did not elect to apply the provision of ASU 2018-02.

Securities

Securities	3 Months Ended
	Mar. 31, 2018
Investments Debt And Equity Securities [Abstract]
Securities	Note 3. Securities The following table summarizes the amortized cost, fair value, and the corresponding amounts of gross unrealized gains and losses for available for sale securities at March 31, 2018 and December 31, 2017: As of March 31, 2018: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for sale: U.S. Government sponsored agency securities $ 6,990,015 $ — $ (121,935 ) $ 6,868,080 Mortgage-backed securities: residential 13,379,005 — (391,542 ) 12,987,463 Collateralized mortgage obligations 17,606,822 — (597,854 ) 17,008,968 Total available for sale $ 37,975,842 $ — $ (1,111,331 ) $ 36,864,511 As of December 31, 2017: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for sale: U.S. Government sponsored agency securities $ 6,988,681 $ 2,001 $ (58,674 ) $ 6,932,008 Mortgage-backed securities: residential 14,109,433 — (168,908 ) 13,940,525 Collateralized mortgage obligations 18,458,814 — (345,316 ) 18,113,498 Other securities 2,518,498 — (32,818 ) 2,485,680 Total available for sale $ 42,075,426 $ 2,001 $ (605,716 ) $ 41,471,711 There were no sales of securities available for sale in the three months ended March 31, 2018 or 2017. The amortized cost and estimated fair value of securities available for sale at March 31, 2018, by contractual maturity, are shown below. Securities without a contractual maturity are shown separately. As of March 31, 2018: Amortized Cost Fair Value Available for sale: One to five years $ 6,990,015 $ 6,868,080 Mortgage-backed securities: residential 13,379,005 12,987,463 Collateralized mortgage obligations 17,606,822 17,008,968 Total available for sale $ 37,975,842 $ 36,864,511 Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. At March 31, 2018 and December 31, 2017, there were no holdings of securities of any one issuer, other than the U.S. Government and its agencies, in an amount greater than 10% of shareholders’ equity. The following table summarizes securities with unrealized losses at March 31, 2018 and December 31, 2017, aggregated by length of time in a continuous unrealized loss position: Less Than 12 Months 12 Months or Longer Total As of March 31, 2018: Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Available for sale: U.S. Government sponsored agency securities $ 4,906,706 $ (84,035 ) $ 1,961,374 $ (37,900 ) $ 6,868,080 $ (121,935 ) Mortgage-backed securities: residential 7,352,009 (189,372 ) 5,635,454 (202,170 ) 12,987,463 (391,542 ) Collateralized mortgage obligations 9,121,786 (295,660 ) 7,887,182 (302,194 ) 17,008,968 (597,854 ) Total available for sale $ 21,380,501 $ (569,067 ) $ 15,484,010 $ (542,264 ) $ 36,864,511 $ (1,111,331 ) Less Than 12 Months 12 Months or Longer Total As of December 31, 2017: Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Available for sale: U.S. Government sponsored agency securities $ 3,957,340 $ (33,620 ) $ 1,974,139 $ (25,054 ) $ 5,931,479 $ (58,674 ) Mortgage-backed securities: residential 7,954,428 (70,965 ) 5,986,097 (97,943 ) 13,940,525 (168,908 ) Collateralized mortgage obligations 9,642,028 (138,243 ) 8,471,469 (207,073 ) 18,113,497 (345,316 ) Other securities 2,485,680 (32,818 ) — — 2,485,680 (32,818 ) Total available for sale $ 24,039,476 $ (275,646 ) $ 16,431,705 $ (330,070 ) $ 40,471,181 $ (605,716 ) The Company believes that the unrealized losses are temporary, arising mainly from fluctuations in interest rates and do not reflect a deterioration of credit quality of the issuers. In analyzing an issuer’s financial condition, the Company may consider whether the securities are issued by the federal government or its agencies, whether downgrades by bond rating agencies have occurred, and the results of reviews of the issuer’s financial condition. The fair value is expected to recover as the securities approach maturity. Management does not intend to sell and it is likely that management will not be required to sell the securities prior to their anticipated recovery. There were no securities pledged as collateral at March 31, 2018 or December 31, 2017. Other investments at March 31, 2018 and December 31, 2017, consisted of the following: March 31, 2018 December 31, 2017 FHLB stock $ 4,096,500 $ 4,096,500 PCBB stock 190,000 190,000 Mutual fund - CRA qualified 2,532,056 — Total other investments $ 6,818,556 $ 4,286,500 Effective January 2018, the Company adopted ASU 2016-01 and

Loans

Loans	3 Months Ended
	Mar. 31, 2018
Receivables [Abstract]
Loans	Note 4. Loans The composition of the loan portfolio was as follows at March 31, 2018 and December 31, 2017: March 31, 2018 December 31, 2017 Real estate: Commercial real estate $ 455,662,700 $ 420,759,900 SBA loans—real estate 103,390,716 106,924,278 Total real estate 559,053,416 527,684,178 SBA loans—non-real estate 10,100,567 8,634,879 Commercial and industrial 114,746,789 103,681,574 Home mortgage 106,187,527 104,067,756 Consumer 3,662,731 3,955,514 Gross loans receivable 793,751,030 748,023,901 Allowance for loan losses (9,716,168 ) (9,139,488 ) Loans receivable, net $ 784,034,862 $ 738,884,413 No loans were outstanding to related parties as of March 31, 2018. T The activity in the allowance for loan losses for the three months ended March 31, 2018 and 2017 was as follows: SBA Commercial SBA Loans Loans Non- Commercial Home Real Estate Real Estate Real Estate and Industrial Mortgage Consumer Total Three months ended March 31, 2018: Beginning balance $ 4,801,297 $ 1,082,065 $ 537,967 $ 1,265,456 $ 1,407,742 $ 44,961 $ 9,139,488 Provision for loan losses 410,996 (76,299 ) (39,340 ) 315,765 (32,481 ) (3,461 ) 575,180 Charge-offs — — — — — — — Recoveries — — 1,500 — — — 1,500 Ending balance $ 5,212,293 $ 1,005,766 $ 500,127 $ 1,581,221 $ 1,375,261 $ 41,500 $ 9,716,168 Three months ended March 31, 2017: Beginning balance $ 4,217,089 $ 892,605 $ 59,032 $ 1,322,294 $ 1,363,628 $ 55,034 $ 7,909,682 Provision for loan losses 1,898 29,050 452,768 (28,270 ) 88,140 (2,503 ) 541,083 Charge-offs — — (75,894 ) — — — (75,894 ) Recoveries — — 5,225 — — — 5,225 Ending balance $ 4,218,987 $ 921,655 $ 441,131 $ 1,294,024 $ 1,451,768 $ 52,531 $ 8,380,096 The following table presents the balance in the allowance for loan losses and the recorded investment in loans by portfolio segment as of March 31, 2018 and December 31, 2017: Loans Individually Evaluated for Impairment Loans Collectively Evaluated for Impairment Total As of March 31, 2018: Allowance for loan losses: Commercial real estate $ — $ 5,212,293 $ 5,212,293 SBA loans—real estate — 1,005,766 1,005,766 SBA loans—non-real estate 361,736 138,391 500,127 Commercial and industrial 553,453 1,027,768 1,581,221 Home mortgage — 1,375,261 1,375,261 Consumer — 41,500 41,500 Total $ 915,189 $ 8,800,979 $ 9,716,168 Loans: Commercial real estate $ — $ 456,753,192 $ 456,753,192 SBA loans—real estate — 103,902,484 103,902,484 SBA loans—non-real estate 361,736 9,756,228 10,117,964 Commercial and industrial 1,759,498 113,260,683 115,020,181 Home mortgage 241,163 106,369,554 106,610,717 Consumer — 3,672,606 3,672,606 Total $ 2,362,397 $ 793,714,747 $ 796,077,144 As of December 31, 2017: Allowance for loan losses: Commercial real estate $ — $ 4,801,297 $ 4,801,297 SBA loans—real estate — 1,082,065 1,082,065 SBA loans—non-real estate — 537,967 537,967 Commercial and industrial 353,985 911,471 1,265,456 Home mortgage — 1,407,742 1,407,742 Consumer — 44,961 44,961 Total $ 353,985 $ 8,785,503 $ 9,139,488 Loans: Commercial real estate $ — $ 421,811,734 $ 421,811,734 SBA loans—real estate — 107,427,788 107,427,788 SBA loans—non-real estate — 8,655,808 8,655,808 Commercial and industrial 353,985 103,601,098 103,955,083 Home mortgage 241,164 104,239,551 104,480,715 Consumer 20,763 3,946,491 3,967,254 Total $ 615,912 $ 749,682,470 $ 750,298,382 The following table presents information related to impaired loans by class of loans as of and for the three ended March 31, 2018 and 2017. The difference between the unpaid principal balance (net of partial charge-offs) and the recorded investment in the loans is not considered to be material. Average Interest Recorded Allowance Recorded Income Investment Allocated Investment Recognized As of and for the three months ended March 31, 2018: With no related allowance recorded: Commercial and industrial $ 749,368 $ — $ 749,368 $ 10,356 Home mortgage 241,163 — 241,163 — With an allowance recorded: SBA loans—non-real estate 361,736 361,736 361,736 — Commercial and industrial 1,010,130 553,453 1,023,052 13,740 $ 2,362,397 $ 915,189 $ 2,375,319 $ 24,096 As of and for the three months ended March 31, 2017: With no related allowance recorded: Home mortgage $ 811,490 $ — $ 813,020 $ 11,265 With an allowance recorded: SBA loans—non-real estate 388,736 388,736 388,736 — Commercial and industrial 363,700 363,700 365,510 3,926 $ 1,563,926 $ 752,436 $ 1,567,266 $ 15,191 The difference between interest income recognized and cash basis interest recognized was immaterial. The following table presents the recorded investment in nonaccrual loans and loans past due greater than 90 days still accruing interest by class of loans as of March 31, and December 31, 2017: Nonaccrual Loans >90 Days Past Due & Still Accruing Total As of March 31, 2018: Home mortgage $ 241,163 $ — $ 241,163 Total $ 241,163 $ — $ 241,163 As of December 31, 2017: Home mortgage $ 662,365 $ — $ 662,365 Consumer 20,763 — 20,763 Total $ 683,128 $ — $ 683,128 Nonaccrual loans and loans past due 90 days still on accrual include both smaller balance homogeneous loans that are collectively evaluated for impairment and individually classified impaired loans. The following table represents the aging of the recorded investment in past due loans as of March 31, 2018 and December 31, 2017: 30-59 Days Past Due 60-89 Days Past Due > 90 Days Past Due Total Past Due Loans Not Past Due Total As of March 31, 2018: Commercial real estate $ — $ — $ — $ — $ 456,753,192 $ 456,753,192 SBA—real estate 139,659 — — 139,659 103,762,825 103,902,484 SBA—non-real estate 86,905 — — 86,905 10,031,059 10,117,964 Commercial and industrial — — — — 115,020,181 115,020,181 Home mortgage — — 241,163 241,163 106,369,554 106,610,717 Consumer — — — — 3,672,606 3,672,606 $ 226,564 $ — $ 241,163 $ 467,727 $ 795,609,417 $ 796,077,144 As of December 31, 2017: Commercial real estate $ — $ — $ — $ — $ 421,811,734 $ 421,811,734 SBA—real estate 139,806 — — 139,806 107,287,982 107,427,788 SBA—non-real estate 61,611 — — 61,611 8,594,197 8,655,808 Commercial and industrial — — — — 103,955,083 103,955,083 Home mortgage — — 662,365 662,365 103,818,350 104,480,715 Consumer — — — — 3,967,254 3,967,254 $ 201,417 $ — $ 662,365 $ 863,782 $ 749,434,600 $ 750,298,382 Troubled Debt Restructurings Modifications made were primarily extensions of existing payment modifications on loans previously identified as troubled debt restructurings. There were no new loans identified as trouble debt restructurings during the three months ended March 31, 2018 or December 31, 2017. There were no payment defaults during the three months ended March 31, 2018 or December 31, 2017 of loans that had been modified as troubled debt restructurings within the previous twelve months. Credit Quality Indicators Special Mention—Loans classified as special mention have a potential weakness that deserves management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or of the Company’s credit position at some future date. Substandard—Loans classified as substandard are inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged, if any. Loans so classified have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the institution will sustain some loss if the deficiencies are not corrected. Doubtful—Loans classified as doubtful have all the weaknesses inherent in those classified as substandard, with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. Loans not meeting the criteria above that are analyzed individually as part of the above described process are considered to be pass-rated loans. As of March 31, 2018 and December 31, 2017, and based on the most recent analysis performed, the risk category of loans by class of loans is as follows: Pass Special Mention Substandard Doubtful Total As of March 31, 2018: Commercial real estate $ 456,753,192 $ — $ — $ — $ 456,753,192 SBA loans—real estate 102,575,944 — 1,326,540 — 103,902,484 SBA loans—non-real estate 9,982,402 107,166 28,396 — 10,117,964 Commercial and industrial 113,260,683 — 1,759,498 — 115,020,181 Home mortgage 106,369,554 — 241,163 — 106,610,717 Consumer 3,672,606 — — — 3,672,606 $ 792,614,381 $ 107,166 $ 3,355,597 $ — $ 796,077,144 As of December 31, 2017: Commercial real estate $ 421,811,734 $ — $ — $ — $ 421,811,734 SBA loans—real estate 106,405,966 — 1,021,822 — 107,427,788 SBA loans—non-real estate 8,594,375 32,702 28,731 — 8,655,808 Commercial and industrial 103,601,098 — 353,985 — 103,955,083 Home mortgage 103,818,350 — 662,365 — 104,480,715 Consumer 3,946,491 — 20,763 — 3,967,254 $ 748,178,014 $ 32,702 $ 2,087,666 $ — $ 750,298,382

Premises and Equipment

Premises and Equipment	3 Months Ended
	Mar. 31, 2018
Property Plant And Equipment [Abstract]
Premises and Equipment	Note 5. Premises and equipment The Company’s premises and equipment consisted of the following at March 31, 2018 and December 31, 2017: March 31, 2018 December 31, 2017 Leasehold improvements $ 5,394,244 $ 5,061,520 Furniture and fixtures 2,552,850 2,492,623 Equipment and others 1,748,899 1,677,175 Total cost 9,695,993 9,231,318 Accumulated depreciation (4,988,532 ) (4,750,526 ) Net book value $ 4,707,461 $ 4,480,792 Total depreciation expense included in occupancy and equipment expenses was $240,416, and $263,793 for the three months ended March 31, 2018 and 2017, respectively.

Servicing Assets

Servicing Assets	3 Months Ended
	Mar. 31, 2018
Servicing Asset [Abstract]
Servicing Assets	Note 6. Servicing Assets Activity for loan servicing assets during the three months ended March 31, 2018 and 2017 is as follows: Three Months Ended March 31, 2018 Three Months Ended March 31, 2017 Beginning balance $ 6,771,097 $ 6,782,555 Additions 377,562 479,654 Amortized to expense (423,859 ) (379,296 ) Ending balance $ 6,724,800 $ 6,882,913 There was no valuation allowance recorded against the carrying value of the servicing assets as of March 31, 2018 or 2017. The fair value of the servicing assets was $8,296,183 at March 31, 2018, which was determined using discount rates ranging from 4.15% to 10.40% and prepayment speeds ranging from 11.1% to 11.8%, depending on the stratification of the specific assets. The fair value of the servicing assets was $8,940,415 at March 31, 2017, which was determined using discount rates ranging from 4.47% to 10.72% and prepayment speeds ranging from 9.7% to 10.6%, depending on the stratification of the specific assets.

Deposits

Deposits	3 Months Ended
	Mar. 31, 2018
Banking And Thrift [Abstract]
Deposits	Note 7. Deposits Time deposits that exceed the FDIC insurance limit of $250,000 at March 31, 2018 and December 31, 2017 were $124,637,331 and $108,952,059, respectively. The scheduled maturities of time deposits were as follows at March 31, 2018: March 31, 2018 2018 remaining $ 184,486,181 2019 78,181,973 2020 884,212 Thereafter 295,679 Total $ 263,848,045 Deposits from principal officers, directors, and their affiliates at March 31, 2018 and December 31, 2017 were $1,614,564 and $1,068,580, respectively.

Borrowing Arrangements

Borrowing Arrangements	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Borrowing Arrangements	Note 8. Borrowing arrangements As of March 31, 2018, the Company had a $10 million advance outstanding from the Federal Home Loan Bank of San Francisco. The maturity date of this advance was April 2, 2018 and the interest rate on the advances was 1.87%. The advance was paid off on April 2, 2018 as scheduled. In addition, the Company has a letter of credit with the FHLB in the amount of $49,000,000 to secure a public deposit. The Company had available borrowings from the following institutions as of March 31, 2018: March 31, 2018 Federal Home Loan Bank—San Francisco $ 166,242,000 Federal Reserve Bank 96,607,000 Pacific Coast Bankers Bank 4,000,000 Zions Bank 5,500,000 Total $ 272,349,000 The Company has pledged approximately $640,624,000 of loans as collateral for these lines of credit as of March 31, 2018.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Note 9. Income Taxes On December 22, 2017, H.R.1, commonly known as the Tax Cuts and Jobs Act (the “Tax Act”), was signed into law, which among other items reduced the federal corporate tax rate to 21% from 35%, effective January 1, 2018. U.S. generally accepted accounting principles required companies to re-measure certain tax-related assets and liabilities as of the date of enactment of the new legislation with resulting tax effects accounted for in the reporting period of enactment. The Company concluded that the enactment of the Tax Act caused its net deferred tax assets (“DTA”) to be re-measured at the new lower tax rate. The Company performed an analysis and determined the value of the net DTA should be reduced by $1.3 million, which was recognized as a one-time, incremental income tax expense in the fourth quarter of 2017. The Company’s income tax expense was $1.2 million and $1.4 million for the three months ended March 31, 2018 and 2017, respectively. The effective income tax rate was 26.7 percent and 39.1 percent for the three months ended March 31, 2018 and 2017, respectively. The significant decrease in the effective tax rate for the first quarter of 2018 was due to the enactment the Tax Act. The Company is subject to U.S. Federal income tax as well as various state taxing jurisdictions. The Company is no longer subject to examination by Federal taxing authorities for tax years prior to 2014 and for state taxing authorities for tax years prior to 2013. There were no significant unrealized tax benefits recorded as of March 31, 2018 and 2017, and the Company does not expect any significant increase in unrealized tax benefits in the next twelve months.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2018
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 10. Commitments and Contingencies Lease Commitments 2018 remaining $ 1,231,143 2019 1,737,769 2020 1,779,970 2021 1,830,979 2022 1,825,952 Thereafter 3,797,971 Total $ 12,203,784 Off-Balance-Sheet Credit Risk The Company evaluates the creditworthiness of each customer. Collateral, if deemed necessary by the Company upon the extension of credit, is obtained based on management’s evaluation of the borrower. Collateral for commercial and industrial loans may vary, but may include securities, accounts receivable, inventory, property, plant and equipment, and income producing commercial or other properties. The following table shows the distribution of undisbursed loan commitments as of the dates indicated: March 31, 2018 December 31, 2017 Commitments to extend credit $ 53,060,000 $ 60,748,000 Standby letter of credit 1,937,000 1,627,000 Commercial letter of credit 1,479,000 1,608,000 Total undisbursed loan commitments $ 56,476,000 $ 63,983,000 The majority of these off-balance sheet commitments have a variable interest rate. Management does not anticipate any material losses as a result of these transactions.

Stock-based Compensation

Stock-based Compensation	3 Months Ended
	Mar. 31, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-based Compensation	Note 11. Stock-based Compensation The Company has two stock-based compensation plans currently in effect as of March 31, 2018, as described further below. Total compensation cost that has been charged against earnings for these plans in the three months ended March 31, 2018 and 2017 was $245,968 and $179,289, respectively. 2005 Plan The options, when granted, vest either immediately or ratably over five years from the date of the grant and expire after ten years if not exercised. There were no stock options granted under the 2005 Plan during the three months ended March 31, 2018 or 2017. A summary of the transactions under the 2005 Plan for the three months ended March 31, 2018 is as follows: Weighted Number of Average Aggregate Options Exercise Intrinsic Outstanding Price Value Outstanding, as of January 1, 2018 335,000 $ 3.99 Options granted — — Options exercised — — Options forfeited — — Options expired — — Outstanding, as of March 31, 2018 335,000 3.99 $ 2,832,700 Fully vested and expected to vest 328,500 3.95 $ 2,791,960 Vested 309,000 $ 3.81 $ 2,669,740 Information related to the 2005 Plan for the periods indicated follows: Three Months Ended Three Months Ended March 31, 2018 March 31, 2017 Intrinsic value of options exercised $ — $ 115,250 Cash received from option exercises — 76,250 Tax benefit realized from option exercised — — There were no shares available for grant under the 2005 Plan as of March 31, 2018. The weighted average remaining contractual term of stock options outstanding under the 2005 Plan at March 31, 2018 was 3.31 years. The weighted average remaining contractual term of stock options that were exercisable at March 31, 2018 was 3.12 years. As of March 31, 2018, the Company had approximately $15,983 of unrecognized compensation costs related to unvested stock options under the 2005 Plan. The Company expects to recognize these costs over a weighted average period of 0.50 year. 2010 Plan The exercise prices of stock options granted under the plan may not be less than 100 percent of the fair value of the Company’s stock at the date of grant. The options, when granted, vest ratably over five years from the date of the grant and expire after ten years if not exercised. Option prices under the 2010 Plan are to be equal to the fair value of the Company’s common stock on the date of grant. There were no stock options granted under the 2010 Plan during the three months ended March 31, 2018 or 2017. Restricted stock awards issued under the 2010 Plan may or may not be subject to vesting provisions. Awards which were granted in the three months ended March 31, 2018 and 2017 are not subject to vesting provisions. Owners of the restricted stock awards shall have all of the rights of a shareholder including the right to vote the shares and to all dividends (cash or stock). Compensation expense related to restricted stock awards will be recognized over the vesting period of the awards based on the fair value of the Company’s common stock at the issue date. A summary of stock options issued under the 2010 Plan for the three months ended March 31, 2018 is as follows: Weighted Number of Average Aggregate Options Exercise Intrinsic Outstanding Price Value Outstanding, as of January 1, 2018 795,000 $ 4.22 Options granted — — Options exercised (40,000 ) 2.85 Options forfeited — — Options expired — — Outstanding, as of March 31, 2018 755,000 4.29 $ 6,160,100 Fully vested and expected to vest 725,000 4.14 $ 6,026,600 Vested 635,000 $ 3.59 $ 5,626,100 Information related to stock options exercised under the 2010 Plan for the periods indicated follows: Three Months Ended Three Months Ended March 31, 2018 March 31, 2017 Intrinsic value of options exercised $ 286,000 $ 176,000 Cash received from option exercises 114,000 114,000 Tax benefit realized from option exercised 72,608 57,020 The weighted average remaining contractual term of stock options outstanding under the 2010 Plan at March 31, 2018 was 3.50 years. The weighted average remaining contractual term of stock options that were exercisable at March 31, 2018 was 3.03 years. A summary of the changes in the Company’s non-vested restricted stock awards under the 2010 Plan for the three months ended March 31, 2018 is as follows: Shares Issued Weighted Average Grant Date Fair Value Aggregate Intrinsic Value Non-vested, as of January 1, 2018 453,500 $ 5.95 Awards granted — — Awards vested — — Awards forfeited — — Non-vested, as of March 31, 2018 453,500 $ 5.95 $ 5,646,075 Information related to non-vested restricted stock awards under the 2010 Plan for the periods indicated follows: Three Months Ended Three Months Ended March 31, 2018 March 31, 2017 Tax benefit realized from awards vested $ — $ 91,080 There were 218,605 shares available for grant under the 2010 Plan as of March 31, 2018 (in either stock options or restricted stock awards). As of March 31, 2017, the Company had approximately $2,264,155 of unrecognized compensation cost related to unvested stock options and restricted stock awards under the 2010 Plan. The Company expects to recognize these costs over a weighted average period of 2.13 years. No shares were vested in the three months ended March 31, 2018.

Revenue Recognition

Revenue Recognition	3 Months Ended
	Mar. 31, 2018
Revenue From Contract With Customer [Abstract]
Revenue Recognition	Note 12. Revenue Recognition Accounting Standards Codification ("ASC") 606, Revenue from Contracts with Customers ("ASC 606"), establishes principles for reporting information about the nature, amount, timing and uncertainty of revenue and cash flows arising from the entity's contracts to provide goods or services to customers. The core principle requires an entity to recognize revenue to depict the transfer of goods or services to customers in an amount that reflects the consideration that it expects to be entitled to receive in exchange for those goods or services recognized as performance obligations are satisfied. The majority of our revenue-generating transactions are not subject to ASC 606, including revenue generated from financial instruments, such as our loans, letters of credit, and investment securities, as well as revenue related to our mortgage servicing activities and revenue on bank owned life insurance, as these activities are subject to other GAAP discussed elsewhere within our disclosures. Descriptions of our revenue-generating activities that are within the scope of ASC 606, which are presented in our income statements as components of noninterest income are as follows: Service charges on deposits Wire transfer fee income: Gain or loss on sale of OREO: Other revenue streams that are recorded in other income in noninterest income include revenue generated from letters of credit and income on bank owned life insurance. These revenue streams are either not material or out of scope of ASC 606.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Note 13. Fair Value of Financial Instruments Fair value is the exchange price that would be received for an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. There are three levels of inputs that may be used to measure fair values: Level 1—Quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date. Level 2—Significant other observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data. Level 3—Significant unobservable inputs that reflect a company’s own assumptions about the assumptions that market participants would use in pricing an asset or liability. The Company used the following methods and significant assumptions to estimate fair value: Securities Available for Sale Impaired Loans Appraisals for collateral-dependent impaired loans are performed by certified general appraisers (for commercial properties) or certified residential appraisers (for residential properties) whose qualifications and licenses have been reviewed and verified by the Company. Once received, a member of the credit department reviews the assumptions and approaches utilized in the appraisal as well as the overall resulting fair value in comparison with independent data sources such as recent market data or industry-wide statistics. Assets and liabilities measured at fair value on a recurring basis at March 31 2018 and December 31, 2017 are summarized below: Fair Value Measuring Using Quoted Significant Other Significant Prices in Observable Unobservable Total Active Markets Inputs Inputs Fair Value (Level 1) (Level 2) (Level 3) As of March 31, 2018 : U.S. Government sponsored agency securities $ 6,868,080 $ — $ 6,868,080 $ — Mortgage-backed securities - residential 12,987,463 — 12,987,463 — Collateralized mortgage obligations 17,008,968 — 17,008,968 — Other investments: Mutual fund - CRA qualified 2,532,056 2,532,056 — — As of December 31, 2017 : U.S. Government sponsored agency securities $ 6,932,008 $ — $ 6,932,008 $ — Mortgage-backed securities - residential 13,940,525 — 13,940,525 — Collateralized mortgage obligations 18,113,498 — 18,113,498 — Other securities 2,485,680 2,485,680 — — There were no transfers between level 1 and level 2 in the three months ended March 31, 2018 or 2017. There were no assets or liabilities measured at fair value on a non-recurring basis at March 31, 2018 or 2017. Financial Instruments As of March 31, 2018: Carrying Amount Level 1 Level 2 Level 3 Value Financial Assets: Cash and cash equivalents $ 69,899,816 $ 69,899,816 $ — $ — $ 69,899,816 Loans held for sale 18,570,944 — 20,270,185 — 20,270,185 Loans receivable, net 784,034,862 — — 779,565,863 779,565,863 Accrued interest receivable 2,503,721 — 177,607 2,326,114 2,503,721 Other investments: FHLB and PCBB stock 4,286,500 N/A N/A N/A N/A Financial Liabilities: Deposit $ 818,279,718 $ — $ 817,655,673 $ — $ 817,655,673 FHLB Advances 10,000,000 — 10,000,000 — 10,000,000 Accrued interest payable 557,559 — 557,559 — 557,559 The carrying amounts and estimated fair values of financial instruments not carried at fair value at December 31, 2017 are as follows: As of December 31, 2017: Carrying Amount Level 1 Level 2 Level 3 Value Financial Assets: Cash and cash equivalents $ 63,249,952 $ 63,249,952 $ — $ — $ 63,249,952 Loans held for sale 15,739,305 — 17,203,060 — 17,203,060 Loans receivable, net 738,884,413 — — 731,436,572 731,436,572 Accrued interest receivable 2,463,486 — 189,005 2,274,481 2,463,486 FHLB and PCBB stock 4,286,500 N/A N/A N/A N/A Financial Liabilities: Deposit $ 773,306,014 $ — $ 773,071,521 $ — $ 773,071,521 FHLB Advances 25,000,000 — 25,000,000 — 25,000,000 Accrued interest payable 423,239 — 423,239 — 423,239 The methods and assumptions, not previously presented, used to estimate fair value are described as follows: (a) Cash and Cash equivalents The carrying amounts of cash and short-term instruments approximate fair values and are classified as Level 1. (b) Loans Held for Sale The fair value of loans held for sale is estimated based upon binding contracts and quotes from third party investors resulting in a Level 2 classification. (c) Loans Receivable, Net Fair values of loans, excluding loans held for sale, are based on the exit price notion set forth by ASU 2016-01 effective January 1, 2017 and estimated using discounted cash flow analyses. The estimation of fair values of loans results in a Level 3 classification as it requires various assumptions and considerable judgement to incorporate factors relevant when selling loans to market participants, such as funding costs, return requirements of likely buyers and performance expectations of the loans given the current market environment and quality of loans. Estimated fair value of loans carried at cost at December 31, 2017 were based on an entry price notion. (d) Other Investments Fair value of CRA qualified mutual fund is readily determinable using quoted prices and is classified as Level 1. It is not practical to determine the fair value of FHLB and PCBB stock due to restrictions placed on their transferability. (e) Deposits The fair values disclosed for demand deposits (e.g., interest and noninterest checking, passbook savings, and certain types of money market accounts) are, by definition, equal to the amount payable on demand at the reporting date (i.e., their carrying amount) resulting in a Level 2 classification. The carrying amounts of variable rate, fixed-term money market accounts and certificates of deposit approximate their fair values at the reporting date resulting in a Level 2 classification. Fair values for fixed rate certificates of deposit are estimated using a discounted cash flows calculation that applies interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities on time deposits resulting in a Level 2 classification. (f) Federal Home Loan Bank Advances The fair values of Federal Home Loan Bank Advances are estimated using discounted cash flow analyses based on the current borrowing rates for similar types of borrowing arrangements, resulting in a Level 2 classification. (g) Accrued Interest Receivable/Payable The carrying amounts of accrued interest approximate fair value and are classified within the same fair value hierarchy level as the related asset or liability. (h) Off-balance Sheet Instruments Fair values for off-balance sheet, credit-related financial instruments are based on fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the counterparties’ credit standing. The fair value of commitments is not material.

Regulatory Capital Matters

Regulatory Capital Matters	3 Months Ended
	Mar. 31, 2018
Regulatory Capital Requirements [Abstract]
Regulatory Capital Matters	Note 14. Regulatory Capital Matters Banks and bank holding companies are subject to regulatory capital requirements administered by federal banking agencies. Capital adequacy guidelines and, additionally for banks, prompt corrective action regulations involve quantitative measures of assets, liabilities, and certain off-balance-sheet items calculated under regulatory accounting practices. Capital amounts and classifications are also subject to qualitative judgments by regulators. Failure to meet capital requirements can initiate regulatory action. The final rules implementing Basel Committee on Banking Supervision’s capital guidelines for U.S. banks (Basel III rules) became effective for the Company on January 1, 2015 with full compliance with all of the requirements being phased in over a multi-year schedule, and fully phased in by January 1, 2019. Under the Basel III rules, the Company must hold a capital conservation buffer above the adequately capitalized risk-based capital ratios. The capital conservation buffer is being phased in from 0.0% for 2015 to 2.50% by 2019. The capital conservation buffers for 2016, 2017 and 2018 are 0.625%, 1.25% and 1.875%, respectively. The net unrealized gain or loss on available for sale securities is not included in computing regulatory capital. Management believes as of March 31, 2018 and December 31, 2017, the Company and Bank meet all capital adequacy requirements to which they are subject. Prompt corrective action regulations provide five classifications: well capitalized, adequately capitalized, undercapitalized, significantly undercapitalized, and critically undercapitalized, although these terms are not used to represent overall financial condition. If adequately capitalized, regulatory approval is required to accept brokered deposits. If undercapitalized, capital distributions are limited, as is asset growth and expansion, and capital restoration plans are required. At December 31, 2017 and 2016, the most recent regulatory notifications categorized the Bank as well capitalized under the regulatory framework for prompt corrective action. There are no conditions or events since that notification that management believes have changed the institution’s category. Actual and required capital amounts (in thousands) and ratios, exclusive of the capital conservation buffer, are presented below at March 31, 2018 and December 31, 2017: Required for Minimum Capital Adequacy To be Considered Actual Purposes "Well Capitalized" (Dollars in thousands) Amount Ratio Amount Ratio Amount Ratio As of March 31, 2018: Total capital (to risk-weighted assets) Consolidated $ 127,461 16.17 % $ 63,057 8.00 % N/A N/A Bank 127,394 16.16 % 63,051 8.00 % 78,814 10.00 % Tier 1 capital (to risk-weighted assets) Consolidated 117,681 14.93 % 47,292 6.00 % N/A N/A Bank 117,614 14.92 % 47,288 6.00 % 63,051 8.00 % Common equity Tier 1 capital (to risk-weighted assets) Consolidated 117,681 14.93 % 35,469 4.50 % N/A N/A Bank 117,614 14.92 % 35,466 4.50 % 51,229 6.50 % Tier 1 capital (to average assets) Consolidated 117,681 13.09 % 35,962 4.00 % N/A N/A Bank 117,614 13.09 % 35,950 4.00 % 44,938 5.00 % Required for Minimum Capital Adequacy To be Considered Actual Purposes "Well Capitalized" (Dollars in thousands) Amount Ratio Amount Ratio Amount Ratio As of December 31, 2017: Total capital (to risk-weighted assets) Consolidated $ 100,713 13.49 % $ 59,729 8.00 % N/A N/A Bank 100,648 13.48 % 59,726 8.00 % 74,658 10.00 % Tier 1 capital (to risk-weighted assets) Consolidated 91,510 12.26 % 44,797 6.00 % N/A N/A Bank 91,445 12.25 % 44,795 6.00 % 59,726 8.00 % Common equity Tier 1 capital (to risk-weighted assets) Consolidated 91,510 12.26 % 33,597 4.50 % N/A N/A Bank 91,445 12.25 % 33,596 4.50 % 48,528 6.50 % Tier 1 capital (to average assets) Consolidated 91,510 10.46 % 35,009 4.00 % N/A N/A Bank 91,445 10.45 % 35,007 4.00 % 43,759 5.00 %

Earnings Per Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2018
Earnings Per Share [Abstract]
Earnings Per Share	Note 15. Earnings per Share The two-class method is used in the calculation of basic and diluted earnings per share. Under the two-class method, earnings available to common shares are allocated between common shares and participating securities. The Company’s restricted stock awards are considered participating securities as the unvested awards have non-forfeitable rights to dividends, paid or unpaid, on unvested awards. The factors used in the earnings per share computation follow: Three Months Ended March 31, 2018 2017 Basic Net income $ 3,215,935 $ 2,145,687 Undistributed earnings allocated to participating securities (106,101 ) (98,007 ) Net income allocated to common shares 3,109,834 2,047,680 Weighted average common shares outstanding 13,292,083 12,925,946 Basic earnings per common share $ 0.23 $ 0.16 Diluted Net income allocated to common shares $ 3,109,834 $ 2,047,680 Weighted average common shares outstanding for basic earnings per common share 13,292,083 12,925,946 Add: Dilutive effects of assumed exercises of stock options 534,873 415,349 Average shares and dilutive potential common shares 13,826,956 13,341,295 Diluted earnings per common share $ 0.22 $ 0.15 No shares of common stock were antidilutive for the three months ended March 31, 2018. Stock options and restricted stock awards for 525,000 shares of common stock were not considered in computing diluted earnings per common share for the three months ended March 31, 2017 because they were antidilutive.

Summary of Significant Accoun22

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation: The accompanying unaudited consolidated financial statements and notes thereto of the Company have been prepared in accordance with the rules and regulations of the Securities and Exchange Commission (“SEC”) for Form 10-Q and conform to practices within the banking industry and include all of the information and disclosures required by accounting principles generally accepted in the United States of America (“GAAP”) for interim financial reporting. The accompanying unaudited consolidated financial statements reflect all adjustments (consisting only of normal recurring adjustments), which are necessary for a fair presentation of financial results for the interim periods presented. The results of operations for the interim periods are not necessarily indicative of the results for the full year. These interim unaudited financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto as of and for the year ended December 31, 2017, included in our registration statement on Form S-1 (333-223444) filed with the SEC on March 5, 2018 and declared effective on March 27, 2018.
Use of Estimates	Use of Estimates: To prepare financial statements in conformity with GAAP, management makes estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the financial statements and the disclosures provided, and actual results could differ.
Concentration of Risk	Concentration of Risk: Most of the Company’s customers are located within Los Angeles County and the surrounding area. The concentration of loans originated in this area may subject the Company to the risk of adverse impacts of economic, regulatory or other developments that could occur in Southern California. The Company has significant concentration in commercial real estate loans. The Company obtains what it believes to be sufficient collateral to secure potential losses. The extent and value of the collateral obtained varies based upon the details underlying each loan agreement.
Cash Flows	Cash Flows: Cash and cash equivalents include cash, deposits with other financial institutions with original maturities less than 90 days, and federal funds sold. Net cash flows are reported for customer loan and deposit transactions and Federal Home Loan Bank advances transactions.
Securities	Securities: Securities are classified as held to maturity and carried at amortized cost when management has the positive intent and ability to hold them to maturity. Securities are classified as available for sale when they might be sold before maturity. Securities available for sale are carried at fair value, with unrealized holding gains and losses reported in other comprehensive income, net of tax. Interest income includes amortization of purchase premium or discount. Premiums and discounts on securities are amortized on the level-yield method without anticipating prepayments. Gains and losses on sales are recorded on the trade date and determined using the specific identification method. Management evaluates securities for other-than-temporary impairment (“OTTI”) on at least a quarterly basis, and more frequently when economic or market conditions warrant such an evaluation. For securities in an unrealized loss position, management considers the extent and duration of the unrealized loss, and the financial condition and near-term prospects of the issuer. Management also assesses whether it intends to sell, or it is more likely than not that it will be required to sell, a security in an unrealized loss position before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the entire difference between amortized cost and fair value is recognized as impairment through earnings. For debt securities that do not meet the aforementioned criteria, the amount of impairment is split into two components as follows: 1) OTTI related to credit loss, which must be recognized in the income statement, and 2) OTTI related to other factors, which is recognized in other comprehensive income. The credit loss is defined as the difference between the present value of the cash flows expected to be collected and the amortized cost basis.
Other investments	Other investments: Other investments includes the followings : (i) Federal Home Loan Bank (“FHLB”) Stock - the Bank is a member of the FHLB system. Members are required to own a certain amount of stock based on the level of borrowings and other factors, and may invest in additional amounts. FHLB stock is carried at cost, classified as a restricted security, and periodically evaluated for impairment based on ultimate recovery of par value. Both cash and stock dividends are reported as income; (ii) Pacific Coast Bankers Bank (“PCBB”) Stock - the Bank is a member of PCBB. PCBB stock is carried at cost, classified as a restricted security, and periodically evaluated for impairment based on ultimate recovery of par value. Both cash and stock dividends are reported as income; and (iii) the Company’s investment in a mutual fund to satisfy the Company’s requirements under the Community Reinvestment Act (“CRA”). CRA mutual fund is reported at fair value. Unrealized gains and losses are recognized in earnings.
Loans Held for Sale	Loans Held for Sale: Certain Small Business Administration (“SBA”) loans that may be sold prior to maturity are designated as held for sale at origination and are recorded at the lower of their cost or fair value less costs to sell, determined on an aggregate basis. A valuation allowance is established if the market value of such loans is lower than their cost, and operations are charged or credited for valuation adjustments. Origination fees on loans held for sale, net of certain costs of processing and closing the loans, are deferred until the time of sale and are included in the computation of the gain or loss from the sales of the related loans. A portion of the premium on sale of SBA loans is recognized as gains on sales of loans at the time of the sale. These loans are generally sold with servicing retained.
Loans Receivable	Loans Receivable: Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at the principal balance outstanding, net of deferred loan fees and costs and an allowance for loan losses. Interest income is accrued on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, are deferred and recognized in interest income using the level-yield method without anticipating prepayments. The recorded investment in loans includes accrued interest receivable, deferred loan fees and costs, and unearned income. The accrual of interest income on commercial real estate and other commercial and industrial loans is discontinued at the time the loan is 90 days delinquent unless the loan is well-secured and in process of collection. Consumer loans are typically charged off no later than 120 days past due. Past due status is based on the contractual terms of the loan. In all cases, loans are placed on nonaccrual status or charged-off at an earlier date if collection of principal or interest is considered doubtful. Nonaccrual loans and loans past due 90 days still on accrual include both smaller balance homogeneous loans that are collectively evaluated for impairment and individually classified impaired loans. All interest accrued but not received for loans placed on nonaccrual status is reversed against interest income. Interest received on such 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 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 a valuation allowance for probable incurred credit losses. Loan losses are charged against the allowance when management believes the uncollectibility of a loan balance is confirmed. Subsequent recoveries, if any, are credited to the allowance. Management estimates the allowance balance required using past loan loss experience, the nature and volume of the portfolio, information about specific borrower situations and estimated collateral values, economic conditions, and other factors. Allocations of the allowance may be made for specific loans, but the entire allowance is available for any loan that in management’s judgment should be charged off. The allowance consists of specific and general components. The specific component relates to loans that are individually classified as impaired. A loan is impaired when, based on current information and events, it is probable that the Company will be unable to collect all amounts due according to the contractual terms of the loan agreement. Loans for which the terms have been modified resulting in a concession, and for which the borrower is experiencing financial difficulties, are considered troubled debt restructurings and classified as impaired. Troubled debt restructurings are separately identified for impairment disclosures and are measured at the present value of estimated future cash flows using the loan’s effective rate at inception. If a troubled debt restructuring is considered to be a collateral dependent loan, the loan is reported, net, at the fair value of the collateral. For troubled debt restructurings that subsequently default, the Company determines the amount of reserve in accordance with the accounting policy for the allowance for loan losses. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed. Impairment is measured on a loan-by-loan basis for commercial real estate and construction loans. Large groups of smaller balance homogeneous loans are collectively evaluated for impairment. Income recognition on impaired loans materially conforms to the method the Company uses for income recognition on nonaccrual loans. Allowance for impaired loans is determined based on the present value of the estimated cash flows or on the fair value of the collateral if the loan is collateral dependent, less costs to sell. If the measured fair value is less than the recorded investment in the loan, the deficiency will be charged off against the allowance for loan losses, or alternatively, a specific allocation will be established. For consumer loans, management will generally charge off the balance if the loan is 90 days or more past due. The general component of the allowance covers non-impaired loans and is based on historical loss experience adjusted for current factors. The historical loss experience is determined by portfolio segment and is based on the actual loss history experienced by the Company over the most recent two years. For those portfolio segments that the Company does not have sufficient historical data available to track the loss migration, the loss factors are based on the actual loss history experienced by the Company over the most recent five years. This actual loss experience is supplemented with other economic factors based on the risks present for each portfolio segment. These economic factors include consideration of the following: levels of and trends in delinquencies and impaired loans; levels of and trends in charge-offs and recoveries; trends in volume and terms of loans; effects of any changes in risk selection and underwriting standards; other changes in lending policies, procedures, and practices; experience, ability, and depth of lending management and other relevant staff; national and local economic trends and conditions; industry conditions; and effects of changes in credit concentrations. Related to the current national and local economic conditions, the Company has considered risk factors including the broad deterioration of property values, reduced consumer and business spending as a result of high unemployment and reduced credit availability, and the lack of confidence in a sustainable recovery. The following portfolio segments have been identified in the Company’s loan portfolio, and are also representative of the classes within the portfolio: commercial real estate, SBA loans—real estate, SBA loans—non-real estate, commercial and industrial, home mortgage, and consumer. The Company reviews the credit risk exposure of all its portfolio segments by internally assigned grades. The Company categorizes loans into risk grades 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. For the home mortgage and consumer portfolio segments, the Company’s primary monitoring tool is reviewing past due listings to determine if the loans are performing. The determination of the allowance for loan losses is based on estimates that are particularly susceptible to changes in the economic environment and market conditions. Management believes that as of March 31, 2018 and December 31, 2017 the allowance for loan losses is adequate based on information currently available. If a deterioration in the economy of the Company’s principal market area occurs, the Company’s loan portfolios could be adversely impacted and higher charge-offs and increases in non-performing assets could result. Such an adverse impact could also require a larger allowance for loan losses.
Servicing Assets	Servicing Assets: When SBA loans are sold with servicing retained, servicing assets are initially recorded at fair value with the income statement effect recorded in gains on sales of loans. Fair value is based on a valuation model that calculates the present value of estimated future net servicing income. The valuation model incorporates assumptions that market participants would use in estimating future net servicing income, such as the cost to service, the discount rate, prepayment speeds, and default rates and losses. The Company compares the valuation model inputs and results to published industry data in order to validate the model results and assumptions. Servicing assets are subsequently measured using the amortization method which requires servicing assets to be amortized into noninterest income in proportion to, and over the period of, the estimated future net servicing income of the underlying loans. Servicing assets are evaluated for impairment based upon the fair value of the assets as compared to their carrying amount. Impairment is recognized through a valuation allowance to the extent that fair value is less than the carrying amount. If the Company later determines that all or a portion of the impairment no longer exists, a reduction of the valuation allowance may be recorded as an increase to income. Changes in the valuation allowances are reported with other income on the income statement. The fair values of servicing rights are subject to fluctuations as a result of changes in estimated and actual prepayment speeds, default rates, and losses. Servicing fee income, which is reported on the income statement as other income, is recorded for fees earned for servicing loans. The fees are based on a contractual percentage of the outstanding principal and are recorded as income when earned. The amortization of servicing assets is netted against loan servicing fee income. Late fees and ancillary fees related to loan servicing are not material.
Company Owned Life Insurance	Company Owned Life Insurance: The Company has purchased life insurance policies on certain key executives. Company owned life insurance is recorded at the amount that can be realized under the insurance contract at the balance sheet date, which is the cash surrender value adjusted for other charges or other amounts due that are probable at settlement.
Transfers of Financial Assets	Transfers of Financial Assets: Transfers of financial assets are accounted for as sales when control over the assets has been relinquished. Control over transferred assets is deemed to be surrendered when the assets have been isolated from the Company, the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets, and the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity.
Premises and Equipment	Premises and Equipment: Premises and equipment are stated at cost, less accumulated depreciation. Equipment and furnishings are depreciated over 3 to 10 years, and leasehold improvements are amortized over the lesser of the terms of the respective leases or the estimated useful lives. The straight-line method of depreciation is used for financial reporting purposes. Repairs and maintenance are charged to operating expenses as incurred.
Other Real Estate Owned, Net	Other Real Estate Owned, Net: Assets acquired through or instead of loan foreclosure are initially recorded at fair value less costs to sell when acquired, establishing a new cost basis. Physical possession of residential real estate property collateralizing a consumer mortgage loan occurs when the legal title is obtained upon completion of foreclosure or when the borrower conveys all interest in the property to satisfy the loan through the completion of a deed in lieu of foreclosure or through a similar legal agreement. These assets are subsequently accounted for at the lower of their cost or fair value less estimated costs to sell. If their fair value declines subsequent to foreclosure, a valuation allowance is recorded through expense. Operating costs after acquisition are expensed.
Loan Commitments and Related Financial Instruments	Loan Commitments and Related Financial Instruments: Financial instruments include off-balance sheet credit instruments, such as commitments to make loans and commercial letters of credit, issued to meet customer financing needs. The face amount for these items represents the exposure to loss, before considering customer collateral or ability to repay. Such financial instruments are recorded when they are funded.
Stock-Based Compensation	Stock-Based Compensation: Compensation cost is recognized for stock options and restricted stock awards issued to employees based on the fair value of the awards at the date of grant. A Black-Scholes model is utilized to estimate the fair value of stock options, while the market price of the Company’s common stock at the date of the grant is used for restricted stock awards. Compensation cost is recognized over the required service period, generally defined as the vesting period. For awards with graded vesting, compensation cost is recognized on a straight-line basis over the requisite service period for the entire award.
Earnings per Common Share	Earnings per Common Share: Basic and diluted earnings per share is based on the two-class method prescribed in ASC Topic 260, Earnings Per Share (ASC 260). Stock options and restricted stock awards are considered outstanding for this calculation unless unearned. Diluted earnings per common share includes the dilutive effect of additional potential common shares issuable under stock-based compensation plans. Earnings and dividends per share are restated for all stock splits and stock dividends through the date of issuance of the financial statements.
Income Taxes	Income Taxes: Income tax expense is the total of the current year income tax due or refundable and the change in deferred tax assets and liabilities. Deferred tax assets and liabilities are the expected future tax amounts for the temporary differences between carrying amounts and tax bases of assets and liabilities, computed using enacted tax rates. A valuation allowance, if needed, reduces deferred tax assets to the amount expected to be realized. A tax position is recognized as a benefit only if it is “more likely than not” that the tax position would be sustained in a tax examination, with a tax examination being presumed to occur. The amount recognized is the largest amount of tax benefit that is greater than 50% likely of being realized on examination. For tax positions not meeting the “more likely than not” test, no tax benefit is recorded. The Company does not expect the total amount of unrecognized tax benefits to significantly increase or decrease in the next twelve months. The Company recognizes interest and/or penalties related to income tax matters in income tax expense. There were no interest or penalties recognized in the three months ended March 31, 2018 or 2017.
Comprehensive Income/(Loss)	Comprehensive Income/(Loss): Comprehensive income/(loss) consists of net income and other comprehensive income. Other comprehensive income includes unrealized gains and losses on securities available for sale, which are also recognized as separate components of shareholders’ equity, net of tax.
Loss Contingencies	Loss Contingencies: Loss contingencies, including claims and legal actions arising in the ordinary course of business, are recorded as liabilities when the likelihood of loss is probable and an amount or range of loss can be reasonably estimated. Management does not believe there now are such matters that will have a material effect on the financial statements.
Fair Value of Financial Instruments	Fair Value of Financial Instruments: Fair values of financial instruments are estimated using relevant market information and other assumptions, as more fully disclosed in Note 13—Fair Value of Financial Instruments. Fair value estimates involve uncertainties and matters of significant judgment regarding interest rates, credit risk, prepayments, and other factors, especially in the absence of broad markets for particular items. Changes in assumptions or in market conditions could significantly affect these estimates.
Operating Segments	Operating Segments: While the chief decision-makers monitor the revenue streams of the various products and services, operations are managed and financial performance is evaluated on a Company-wide basis. Discrete financial information is not available other than on a Company-wide basis.
Reclassifications	Reclassifications: Some items in the prior period financial statements were reclassified to conform to the current presentation. Reclassification had no effect on prior year net income or shareholders’ equity.
Recent Accounting Pronouncements	Recent Accounting Pronouncements: In May 2014, the Financial Accounting Standard Board (FASB) issued Accounting Standard Update (ASU) 2014-9 (ASU 2014-09), Revenue from Contracts with Customers. The core principle of ASU 2014-09 is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance also specifies the accounting for some costs to obtain or fulfill a contract with a customer, as well as enhanced disclosure requirements. In August 2015, the FASB issued ASU 2015-14 which deferred the effective date of ASU 2014-09 to fiscal years, and interim reporting periods within those fiscal years, beginning after December 15, 2017. In March 2016, the FASB issued ASU 2016-08 which clarified the revenue recognition implementation guidance on principal versus agent considerations and is effective during the same period as ASU 2014-09. In April 2016, the FASB issued ASU 2016-10 which clarified the revenue recognition guidance regarding the identification of performance obligations and the licensing implementation and is effective during the same period as ASU 2014-09. In May 2016, the FASB issued ASU 2016-12 which narrowly amended the revenue recognition guidance regarding collectability, noncash consideration, presentation of sales tax and transition. ASU 2016-12 is effective during the same period as ASU 2014-09. The majority of the Company’s revenue consists of net interest income on financial assets and financial liabilities, which is explicitly excluded from the scope of ASU 2014-09. The Company adopted the new standard beginning January 1, 2018. The Company completed its analysis for determining the extent ASU 2014-09 will affect its noninterest income, primarily in the area of fees and service charges on deposit accounts and trade finance activities. Based on the analysis performed, the Company did not have a material change in the timing or measurement of revenues related to noninterest income. This guidance did not have a material impact on the Company’s consolidated financial statements. See Note 12. Revenue Recognition for further details. Effective January 2018, the Company adopted ASU 2016-01, Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities (ASU 2016-01). The main objective of ASU 2016-01 is to enhance the reporting model for financial instruments to provide users of financial statements with more decision-useful information. ASU 2016-01 addresses certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. Some of the amendments in ASU 2016-01 include the following: 1) Require equity investments (except those accounted for under the equity method of accounting or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income; 2) Simplify the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment; 3) Require public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; and 4) Require an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value. For public business entities, the amendments of ASU 2016-01 are effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The adoption of ASU 2016-01 resulted in a transfer of $2.5 million of mutual funds from securities available for sale to other investments on the consolidted balance sheet. However, this standard did not have a material impact on the consolidated financial statements. See Note 13 for fair value measurement disclosures. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) (ASU 2016-02). ASU 2016-02 is intended to increase transparency and comparability among organizations by recognizing lease assets and liabilities on the balance sheet and disclosing key information about lease arrangements. This ASU is effective for annual periods and interim periods within those annual periods beginning after December 15, 2018. Based on leases outstanding at March 31, 2018, the Company does not expect this ASU to have a material impact on the income statement, but does anticipate a $12 million increase in assets and liabilities once this ASU becomes effective. In June 2016, the FASB issued ASU 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (ASU 2016-13). The objective of ASU 2016-13 is to provide financial statement users with decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit. ASU 2016-13 includes provisions that require financial assets measured at amortized cost (such as loans and held to maturity (HTM) debt securities) to be presented at the net amount expected to be collected. This will be accomplished through recognition of an estimate of all current expected credit losses. The estimate will include forecasted information for the timeframe that an entity is able to develop reasonable and supportable forecasts. This is a change from the current practice of recognizing incurred losses based on the probable initial recognition threshold under current GAAP. In addition, credit losses on available for sale (AFS) debt securities will be recorded through an allowance for credit losses rather than as a write-down. Under ASU 2016-13, an entity will be able to record reversals of credit losses in current period income when the estimate of credit losses declines, whereas current GAAP prohibits reflecting those improvements in current period earnings. ASU 2016-13 is effective for annual periods and interim periods within those annual periods beginning after December 15, 2019, and early adoption is permitted for fiscal years, including interim periods, beginning after December 15, 2018. ASU 2016-13 will be applied through a cumulative effect adjustment to retained earnings (modified-retrospective approach), except for debt securities for which an other-than-temporary impairment had been recognized before the effective date. A prospective transition approach is required for these debt securities. The Company is currently evaluating the effects of ASU 2016-13 on its financial statements and disclosures, including software solutions, data requirements and loss estimation methodologies. While the effects cannot yet be quantified, the Company expects ASU 2016-13 to add complexity and costs to its current credit loss evaluation process. In March 2017, the FASB issued ASU 2017-08, Receivables—Nonrefundable Fees and Other Costs (Subtopic 310-20) (ASU 2017-08). ASU 2017-08 amends the amortization period for certain purchased callable debt securities held at a premium. Prior to the issuance of this guidance, premiums were amortized as an adjustment of yield over the contractual life of the instrument. ASU 2017-08 requires premiums on purchased callable debt securities that have explicit, noncontingent call features that are callable at fixed prices to be amortized to the earliest call date. There are no accounting changes for securities held at a discount. This ASU is effective for annual periods and interim periods within those annual periods beginning after December 15, 2018, and early adoption is permitted. ASU 2017-08 will be applied through a cumulative effect adjustment through equity (modified-retrospective approach). The Company is currently evaluating the effects of ASU 2017-08 on its financial statements and disclosures. In May 2017, the FASB issued ASU 2017-09, Compensation—Stock Compensation (Topic 718), Scope of Modification Accounting (ASU 2017-09). ASU 2017-09 clarifies when changes to the terms and conditions of share-based payment awards must be treated as modifications. Specifically, the new guidance permits companies to make certain changes to awards without accounting for them as modifications. ASU 2017-09 is effective for annual periods beginning after December 31, 2017 and will be applied prospectively to an award modified after the effective date. There have been no changes to the terms and conditions of share-based payment awards, and as a result the adoption of this standard did not have a material effect on the Company’s operating results or financial condition. In February 2018, the FASB issued ASU No. 2018-02, “Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.” This ASU permits a reclassification from accumulated other comprehensive income (“AOCI”) to retained earnings for stranded tax effects resulting from the Tax Act. The Company did not elect to apply the provision of ASU 2018-02.

Securities (Tables)

Securities (Tables)	3 Months Ended
	Mar. 31, 2018
Investments Debt And Equity Securities [Abstract]
Schedule of Amortized Cost, Fair Value, and the Corresponding Amounts of Gross Unrealized Gains and Losses	The following table summarizes the amortized cost, fair value, and the corresponding amounts of gross unrealized gains and losses for available for sale securities at March 31, 2018 and December 31, 2017: As of March 31, 2018: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for sale: U.S. Government sponsored agency securities $ 6,990,015 $ — $ (121,935 ) $ 6,868,080 Mortgage-backed securities: residential 13,379,005 — (391,542 ) 12,987,463 Collateralized mortgage obligations 17,606,822 — (597,854 ) 17,008,968 Total available for sale $ 37,975,842 $ — $ (1,111,331 ) $ 36,864,511 As of December 31, 2017: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for sale: U.S. Government sponsored agency securities $ 6,988,681 $ 2,001 $ (58,674 ) $ 6,932,008 Mortgage-backed securities: residential 14,109,433 — (168,908 ) 13,940,525 Collateralized mortgage obligations 18,458,814 — (345,316 ) 18,113,498 Other securities 2,518,498 — (32,818 ) 2,485,680 Total available for sale $ 42,075,426 $ 2,001 $ (605,716 ) $ 41,471,711
Schedule of Amortized Cost and Estimated Fair Value of Securities Available for Sale	There were no sales of securities available for sale in the three months ended March 31, 2018 or 2017. The amortized cost and estimated fair value of securities available for sale at March 31, 2018, by contractual maturity, are shown below. Securities without a contractual maturity are shown separately. As of March 31, 2018: Amortized Cost Fair Value Available for sale: One to five years $ 6,990,015 $ 6,868,080 Mortgage-backed securities: residential 13,379,005 12,987,463 Collateralized mortgage obligations 17,606,822 17,008,968 Total available for sale $ 37,975,842 $ 36,864,511
Schedule of Securities With Unrealized Losses	The following table summarizes securities with unrealized losses at March 31, 2018 and December 31, 2017, aggregated by length of time in a continuous unrealized loss position: Less Than 12 Months 12 Months or Longer Total As of March 31, 2018: Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Available for sale: U.S. Government sponsored agency securities $ 4,906,706 $ (84,035 ) $ 1,961,374 $ (37,900 ) $ 6,868,080 $ (121,935 ) Mortgage-backed securities: residential 7,352,009 (189,372 ) 5,635,454 (202,170 ) 12,987,463 (391,542 ) Collateralized mortgage obligations 9,121,786 (295,660 ) 7,887,182 (302,194 ) 17,008,968 (597,854 ) Total available for sale $ 21,380,501 $ (569,067 ) $ 15,484,010 $ (542,264 ) $ 36,864,511 $ (1,111,331 ) Less Than 12 Months 12 Months or Longer Total As of December 31, 2017: Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Available for sale: U.S. Government sponsored agency securities $ 3,957,340 $ (33,620 ) $ 1,974,139 $ (25,054 ) $ 5,931,479 $ (58,674 ) Mortgage-backed securities: residential 7,954,428 (70,965 ) 5,986,097 (97,943 ) 13,940,525 (168,908 ) Collateralized mortgage obligations 9,642,028 (138,243 ) 8,471,469 (207,073 ) 18,113,497 (345,316 ) Other securities 2,485,680 (32,818 ) — — 2,485,680 (32,818 ) Total available for sale $ 24,039,476 $ (275,646 ) $ 16,431,705 $ (330,070 ) $ 40,471,181 $ (605,716 )
Schedule of Other Investments	Other investments at March 31, 2018 and December 31, 2017, consisted of the following: March 31, 2018 December 31, 2017 FHLB stock $ 4,096,500 $ 4,096,500 PCBB stock 190,000 190,000 Mutual fund - CRA qualified 2,532,056 — Total other investments $ 6,818,556 $ 4,286,500

Loans (Tables)

Loans (Tables)	3 Months Ended
	Mar. 31, 2018
Receivables [Abstract]
Composition of Loan Portfolio	The composition of the loan portfolio was as follows at March 31, 2018 and December 31, 2017: March 31, 2018 December 31, 2017 Real estate: Commercial real estate $ 455,662,700 $ 420,759,900 SBA loans—real estate 103,390,716 106,924,278 Total real estate 559,053,416 527,684,178 SBA loans—non-real estate 10,100,567 8,634,879 Commercial and industrial 114,746,789 103,681,574 Home mortgage 106,187,527 104,067,756 Consumer 3,662,731 3,955,514 Gross loans receivable 793,751,030 748,023,901 Allowance for loan losses (9,716,168 ) (9,139,488 ) Loans receivable, net $ 784,034,862 $ 738,884,413
Schedule of Activity in Allowance for Loan Losses	The activity in the allowance for loan losses for the three months ended March 31, 2018 and 2017 was as follows: SBA Commercial SBA Loans Loans Non- Commercial Home Real Estate Real Estate Real Estate and Industrial Mortgage Consumer Total Three months ended March 31, 2018: Beginning balance $ 4,801,297 $ 1,082,065 $ 537,967 $ 1,265,456 $ 1,407,742 $ 44,961 $ 9,139,488 Provision for loan losses 410,996 (76,299 ) (39,340 ) 315,765 (32,481 ) (3,461 ) 575,180 Charge-offs — — — — — — — Recoveries — — 1,500 — — — 1,500 Ending balance $ 5,212,293 $ 1,005,766 $ 500,127 $ 1,581,221 $ 1,375,261 $ 41,500 $ 9,716,168 Three months ended March 31, 2017: Beginning balance $ 4,217,089 $ 892,605 $ 59,032 $ 1,322,294 $ 1,363,628 $ 55,034 $ 7,909,682 Provision for loan losses 1,898 29,050 452,768 (28,270 ) 88,140 (2,503 ) 541,083 Charge-offs — — (75,894 ) — — — (75,894 ) Recoveries — — 5,225 — — — 5,225 Ending balance $ 4,218,987 $ 921,655 $ 441,131 $ 1,294,024 $ 1,451,768 $ 52,531 $ 8,380,096
Schedule of Allowance for Loan Losses and Recorded Investment in Loans by Portfolio Segment	The following table presents the balance in the allowance for loan losses and the recorded investment in loans by portfolio segment as of March 31, 2018 and December 31, 2017: Loans Individually Evaluated for Impairment Loans Collectively Evaluated for Impairment Total As of March 31, 2018: Allowance for loan losses: Commercial real estate $ — $ 5,212,293 $ 5,212,293 SBA loans—real estate — 1,005,766 1,005,766 SBA loans—non-real estate 361,736 138,391 500,127 Commercial and industrial 553,453 1,027,768 1,581,221 Home mortgage — 1,375,261 1,375,261 Consumer — 41,500 41,500 Total $ 915,189 $ 8,800,979 $ 9,716,168 Loans: Commercial real estate $ — $ 456,753,192 $ 456,753,192 SBA loans—real estate — 103,902,484 103,902,484 SBA loans—non-real estate 361,736 9,756,228 10,117,964 Commercial and industrial 1,759,498 113,260,683 115,020,181 Home mortgage 241,163 106,369,554 106,610,717 Consumer — 3,672,606 3,672,606 Total $ 2,362,397 $ 793,714,747 $ 796,077,144 As of December 31, 2017: Allowance for loan losses: Commercial real estate $ — $ 4,801,297 $ 4,801,297 SBA loans—real estate — 1,082,065 1,082,065 SBA loans—non-real estate — 537,967 537,967 Commercial and industrial 353,985 911,471 1,265,456 Home mortgage — 1,407,742 1,407,742 Consumer — 44,961 44,961 Total $ 353,985 $ 8,785,503 $ 9,139,488 Loans: Commercial real estate $ — $ 421,811,734 $ 421,811,734 SBA loans—real estate — 107,427,788 107,427,788 SBA loans—non-real estate — 8,655,808 8,655,808 Commercial and industrial 353,985 103,601,098 103,955,083 Home mortgage 241,164 104,239,551 104,480,715 Consumer 20,763 3,946,491 3,967,254 Total $ 615,912 $ 749,682,470 $ 750,298,382
Schedule of Information Related to Impaired Loans by Class of Loans	The following table presents information related to impaired loans by class of loans as of and for the three ended March 31, 2018 and 2017. The difference between the unpaid principal balance (net of partial charge-offs) and the recorded investment in the loans is not considered to be material. Average Interest Recorded Allowance Recorded Income Investment Allocated Investment Recognized As of and for the three months ended March 31, 2018: With no related allowance recorded: Commercial and industrial $ 749,368 $ — $ 749,368 $ 10,356 Home mortgage 241,163 — 241,163 — With an allowance recorded: SBA loans—non-real estate 361,736 361,736 361,736 — Commercial and industrial 1,010,130 553,453 1,023,052 13,740 $ 2,362,397 $ 915,189 $ 2,375,319 $ 24,096 As of and for the three months ended March 31, 2017: With no related allowance recorded: Home mortgage $ 811,490 $ — $ 813,020 $ 11,265 With an allowance recorded: SBA loans—non-real estate 388,736 388,736 388,736 — Commercial and industrial 363,700 363,700 365,510 3,926 $ 1,563,926 $ 752,436 $ 1,567,266 $ 15,191
Schedule of Recorded Investment in Nonaccrual Loans and Loans Past Due Greater Than 90 Days Still Accruing Interest by Class of Loans	The following table presents the recorded investment in nonaccrual loans and loans past due greater than 90 days still accruing interest by class of loans as of March 31, and December 31, 2017: Nonaccrual Loans >90 Days Past Due & Still Accruing Total As of March 31, 2018: Home mortgage $ 241,163 $ — $ 241,163 Total $ 241,163 $ — $ 241,163 As of December 31, 2017: Home mortgage $ 662,365 $ — $ 662,365 Consumer 20,763 — 20,763 Total $ 683,128 $ — $ 683,128
Schedule of Aging of Recorded Investment in Past Due Loans	The following table represents the aging of the recorded investment in past due loans as of March 31, 2018 and December 31, 2017: 30-59 Days Past Due 60-89 Days Past Due > 90 Days Past Due Total Past Due Loans Not Past Due Total As of March 31, 2018: Commercial real estate $ — $ — $ — $ — $ 456,753,192 $ 456,753,192 SBA—real estate 139,659 — — 139,659 103,762,825 103,902,484 SBA—non-real estate 86,905 — — 86,905 10,031,059 10,117,964 Commercial and industrial — — — — 115,020,181 115,020,181 Home mortgage — — 241,163 241,163 106,369,554 106,610,717 Consumer — — — — 3,672,606 3,672,606 $ 226,564 $ — $ 241,163 $ 467,727 $ 795,609,417 $ 796,077,144 As of December 31, 2017: Commercial real estate $ — $ — $ — $ — $ 421,811,734 $ 421,811,734 SBA—real estate 139,806 — — 139,806 107,287,982 107,427,788 SBA—non-real estate 61,611 — — 61,611 8,594,197 8,655,808 Commercial and industrial — — — — 103,955,083 103,955,083 Home mortgage — — 662,365 662,365 103,818,350 104,480,715 Consumer — — — — 3,967,254 3,967,254 $ 201,417 $ — $ 662,365 $ 863,782 $ 749,434,600 $ 750,298,382
Schedule of Risk Category of Loans by Class of Loans	As of March 31, 2018 and December 31, 2017, and based on the most recent analysis performed, the risk category of loans by class of loans is as follows: Pass Special Mention Substandard Doubtful Total As of March 31, 2018: Commercial real estate $ 456,753,192 $ — $ — $ — $ 456,753,192 SBA loans—real estate 102,575,944 — 1,326,540 — 103,902,484 SBA loans—non-real estate 9,982,402 107,166 28,396 — 10,117,964 Commercial and industrial 113,260,683 — 1,759,498 — 115,020,181 Home mortgage 106,369,554 — 241,163 — 106,610,717 Consumer 3,672,606 — — — 3,672,606 $ 792,614,381 $ 107,166 $ 3,355,597 $ — $ 796,077,144 As of December 31, 2017: Commercial real estate $ 421,811,734 $ — $ — $ — $ 421,811,734 SBA loans—real estate 106,405,966 — 1,021,822 — 107,427,788 SBA loans—non-real estate 8,594,375 32,702 28,731 — 8,655,808 Commercial and industrial 103,601,098 — 353,985 — 103,955,083 Home mortgage 103,818,350 — 662,365 — 104,480,715 Consumer 3,946,491 — 20,763 — 3,967,254 $ 748,178,014 $ 32,702 $ 2,087,666 $ — $ 750,298,382

Premises and Equipment (Tables)

Premises and Equipment (Tables)	3 Months Ended
	Mar. 31, 2018
Property Plant And Equipment [Abstract]
Schedule of Premises and Equipment	The Company’s premises and equipment consisted of the following at March 31, 2018 and December 31, 2017: March 31, 2018 December 31, 2017 Leasehold improvements $ 5,394,244 $ 5,061,520 Furniture and fixtures 2,552,850 2,492,623 Equipment and others 1,748,899 1,677,175 Total cost 9,695,993 9,231,318 Accumulated depreciation (4,988,532 ) (4,750,526 ) Net book value $ 4,707,461 $ 4,480,792

Servicing Assets (Tables)

Servicing Assets (Tables)	3 Months Ended
	Mar. 31, 2018
Servicing Asset [Abstract]
Schedule of Activity for Loan Servicing Assets	Activity for loan servicing assets during the three months ended March 31, 2018 and 2017 is as follows: Three Months Ended March 31, 2018 Three Months Ended March 31, 2017 Beginning balance $ 6,771,097 $ 6,782,555 Additions 377,562 479,654 Amortized to expense (423,859 ) (379,296 ) Ending balance $ 6,724,800 $ 6,882,913

Deposits (Tables)

Deposits (Tables)	3 Months Ended
	Mar. 31, 2018
Banking And Thrift [Abstract]
Schedule of Maturities of Time Deposits	The scheduled maturities of time deposits were as follows at March 31, 2018: March 31, 2018 2018 remaining $ 184,486,181 2019 78,181,973 2020 884,212 Thereafter 295,679 Total $ 263,848,045

Borrowing Arrangements (Tables)

Borrowing Arrangements (Tables)	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Summary of Borrowings Available to the Company from Institutions	The Company had available borrowings from the following institutions as of March 31, 2018: March 31, 2018 Federal Home Loan Bank—San Francisco $ 166,242,000 Federal Reserve Bank 96,607,000 Pacific Coast Bankers Bank 4,000,000 Zions Bank 5,500,000 Total $ 272,349,000

Commitments and Contingencies (

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2018
Commitments And Contingencies Disclosure [Abstract]
Summary of Rent Commitments Related to Lease	Rent commitments related to the lease of the Company’s main office and branch facilities, before considering renewal options and additional lessor charges, were as follows: 2018 remaining $ 1,231,143 2019 1,737,769 2020 1,779,970 2021 1,830,979 2022 1,825,952 Thereafter 3,797,971 Total $ 12,203,784
Summary of Distribution of Undisbursed Loan Commitments	The following table shows the distribution of undisbursed loan commitments as of the dates indicated: March 31, 2018 December 31, 2017 Commitments to extend credit $ 53,060,000 $ 60,748,000 Standby letter of credit 1,937,000 1,627,000 Commercial letter of credit 1,479,000 1,608,000 Total undisbursed loan commitments $ 56,476,000 $ 63,983,000

Stock-based Compensation (Table

Stock-based Compensation (Tables)	3 Months Ended
	Mar. 31, 2018
2005 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Summary of Stock-based Compensation Stock Options Activity	A summary of the transactions under the 2005 Plan for the three months ended March 31, 2018 is as follows: Weighted Number of Average Aggregate Options Exercise Intrinsic Outstanding Price Value Outstanding, as of January 1, 2018 335,000 $ 3.99 Options granted — — Options exercised — — Options forfeited — — Options expired — — Outstanding, as of March 31, 2018 335,000 3.99 $ 2,832,700 Fully vested and expected to vest 328,500 3.95 $ 2,791,960 Vested 309,000 $ 3.81 $ 2,669,740
Summary of Information Related to Stock Option Plan and Non-vested Restricted Stock Awards	Information related to the 2005 Plan for the periods indicated follows: Three Months Ended Three Months Ended March 31, 2018 March 31, 2017 Intrinsic value of options exercised $ — $ 115,250 Cash received from option exercises — 76,250 Tax benefit realized from option exercised — —
2010 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Summary of Stock-based Compensation Stock Options Activity	A summary of stock options issued under the 2010 Plan for the three months ended March 31, 2018 is as follows: Weighted Number of Average Aggregate Options Exercise Intrinsic Outstanding Price Value Outstanding, as of January 1, 2018 795,000 $ 4.22 Options granted — — Options exercised (40,000 ) 2.85 Options forfeited — — Options expired — — Outstanding, as of March 31, 2018 755,000 4.29 $ 6,160,100 Fully vested and expected to vest 725,000 4.14 $ 6,026,600 Vested 635,000 $ 3.59 $ 5,626,100
Summary of Information Related to Stock Option Plan and Non-vested Restricted Stock Awards	Information related to stock options exercised under the 2010 Plan for the periods indicated follows: Three Months Ended Three Months Ended March 31, 2018 March 31, 2017 Intrinsic value of options exercised $ 286,000 $ 176,000 Cash received from option exercises 114,000 114,000 Tax benefit realized from option exercised 72,608 57,020
2010 Plan | Restricted Stock Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Summary of Information Related to Stock Option Plan and Non-vested Restricted Stock Awards	Information related to non-vested restricted stock awards under the 2010 Plan for the periods indicated follows: Three Months Ended Three Months Ended March 31, 2018 March 31, 2017 Tax benefit realized from awards vested $ — $ 91,080
Summary of Changes in Non-vested Restricted Stock Awards	A summary of the changes in the Company’s non-vested restricted stock awards under the 2010 Plan for the three months ended March 31, 2018 is as follows: Shares Issued Weighted Average Grant Date Fair Value Aggregate Intrinsic Value Non-vested, as of January 1, 2018 453,500 $ 5.95 Awards granted — — Awards vested — — Awards forfeited — — Non-vested, as of March 31, 2018 453,500 $ 5.95 $ 5,646,075

Fair Value of Financial Instr31

Fair Value of Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Summary of Assets and Liabilities Measured at Fair Value on Recurring Basis	Assets and liabilities measured at fair value on a recurring basis at March 31 2018 and December 31, 2017 are summarized below: Fair Value Measuring Using Quoted Significant Other Significant Prices in Observable Unobservable Total Active Markets Inputs Inputs Fair Value (Level 1) (Level 2) (Level 3) As of March 31, 2018 : U.S. Government sponsored agency securities $ 6,868,080 $ — $ 6,868,080 $ — Mortgage-backed securities - residential 12,987,463 — 12,987,463 — Collateralized mortgage obligations 17,008,968 — 17,008,968 — Other investments: Mutual fund - CRA qualified 2,532,056 2,532,056 — — As of December 31, 2017 : U.S. Government sponsored agency securities $ 6,932,008 $ — $ 6,932,008 $ — Mortgage-backed securities - residential 13,940,525 — 13,940,525 — Collateralized mortgage obligations 18,113,498 — 18,113,498 — Other securities 2,485,680 2,485,680 — —
Summary of Carrying Amounts and Estimated Fair Values of Financial Instruments Not Carried at Fair Value	Financial Instruments As of March 31, 2018: Carrying Amount Level 1 Level 2 Level 3 Value Financial Assets: Cash and cash equivalents $ 69,899,816 $ 69,899,816 $ — $ — $ 69,899,816 Loans held for sale 18,570,944 — 20,270,185 — 20,270,185 Loans receivable, net 784,034,862 — — 779,565,863 779,565,863 Accrued interest receivable 2,503,721 — 177,607 2,326,114 2,503,721 Other investments: FHLB and PCBB stock 4,286,500 N/A N/A N/A N/A Financial Liabilities: Deposit $ 818,279,718 $ — $ 817,655,673 $ — $ 817,655,673 FHLB Advances 10,000,000 — 10,000,000 — 10,000,000 Accrued interest payable 557,559 — 557,559 — 557,559 The carrying amounts and estimated fair values of financial instruments not carried at fair value at December 31, 2017 are as follows: As of December 31, 2017: Carrying Amount Level 1 Level 2 Level 3 Value Financial Assets: Cash and cash equivalents $ 63,249,952 $ 63,249,952 $ — $ — $ 63,249,952 Loans held for sale 15,739,305 — 17,203,060 — 17,203,060 Loans receivable, net 738,884,413 — — 731,436,572 731,436,572 Accrued interest receivable 2,463,486 — 189,005 2,274,481 2,463,486 FHLB and PCBB stock 4,286,500 N/A N/A N/A N/A Financial Liabilities: Deposit $ 773,306,014 $ — $ 773,071,521 $ — $ 773,071,521 FHLB Advances 25,000,000 — 25,000,000 — 25,000,000 Accrued interest payable 423,239 — 423,239 — 423,239

Regulatory Capital Matters (Tab

Regulatory Capital Matters (Tables)	3 Months Ended
	Mar. 31, 2018
Regulatory Capital Requirements [Abstract]
Summary of Actual and Required Capital Amounts and Ratios, Exclusive of Capital Conservation Buffer	Actual and required capital amounts (in thousands) and ratios, exclusive of the capital conservation buffer, are presented below at March 31, 2018 and December 31, 2017: Required for Minimum Capital Adequacy To be Considered Actual Purposes "Well Capitalized" (Dollars in thousands) Amount Ratio Amount Ratio Amount Ratio As of March 31, 2018: Total capital (to risk-weighted assets) Consolidated $ 127,461 16.17 % $ 63,057 8.00 % N/A N/A Bank 127,394 16.16 % 63,051 8.00 % 78,814 10.00 % Tier 1 capital (to risk-weighted assets) Consolidated 117,681 14.93 % 47,292 6.00 % N/A N/A Bank 117,614 14.92 % 47,288 6.00 % 63,051 8.00 % Common equity Tier 1 capital (to risk-weighted assets) Consolidated 117,681 14.93 % 35,469 4.50 % N/A N/A Bank 117,614 14.92 % 35,466 4.50 % 51,229 6.50 % Tier 1 capital (to average assets) Consolidated 117,681 13.09 % 35,962 4.00 % N/A N/A Bank 117,614 13.09 % 35,950 4.00 % 44,938 5.00 % Required for Minimum Capital Adequacy To be Considered Actual Purposes "Well Capitalized" (Dollars in thousands) Amount Ratio Amount Ratio Amount Ratio As of December 31, 2017: Total capital (to risk-weighted assets) Consolidated $ 100,713 13.49 % $ 59,729 8.00 % N/A N/A Bank 100,648 13.48 % 59,726 8.00 % 74,658 10.00 % Tier 1 capital (to risk-weighted assets) Consolidated 91,510 12.26 % 44,797 6.00 % N/A N/A Bank 91,445 12.25 % 44,795 6.00 % 59,726 8.00 % Common equity Tier 1 capital (to risk-weighted assets) Consolidated 91,510 12.26 % 33,597 4.50 % N/A N/A Bank 91,445 12.25 % 33,596 4.50 % 48,528 6.50 % Tier 1 capital (to average assets) Consolidated 91,510 10.46 % 35,009 4.00 % N/A N/A Bank 91,445 10.45 % 35,007 4.00 % 43,759 5.00 %

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2018
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings Per Share	. The factors used in the earnings per share computation follow: Three Months Ended March 31, 2018 2017 Basic Net income $ 3,215,935 $ 2,145,687 Undistributed earnings allocated to participating securities (106,101 ) (98,007 ) Net income allocated to common shares 3,109,834 2,047,680 Weighted average common shares outstanding 13,292,083 12,925,946 Basic earnings per common share $ 0.23 $ 0.16 Diluted Net income allocated to common shares $ 3,109,834 $ 2,047,680 Weighted average common shares outstanding for basic earnings per common share 13,292,083 12,925,946 Add: Dilutive effects of assumed exercises of stock options 534,873 415,349 Average shares and dilutive potential common shares 13,826,956 13,341,295 Diluted earnings per common share $ 0.22 $ 0.15

Business Description - Addition

Business Description - Additional Information (Details) $ / shares in Units, $ in Millions	Mar. 27, 2018USD ($)$ / sharesshares	Mar. 31, 2018BranchOfficeshares
Business Description [Line Items]
Operations commenced date		Jun. 1, 2016
Number of full service branches | Branch		8
Number of loan production offices | Office		3
Common Stock
Business Description [Line Items]
Stock issued under stock offering, net of expenses, shares | shares		2,300,000
Proceeds from issuance initial public offering	$ 22.6
Initial Public Offering
Business Description [Line Items]
Underwriting Discounts and Commissions	1.7
Payments of Stock Issuance Costs	$ 925,000
Initial Public Offering | Common Stock
Business Description [Line Items]
Stock issued under stock offering, net of expenses, shares | shares	2,300,000
Stock price per shre | $ / shares	$ 11
Open Bank
Business Description [Line Items]
Percentage of voting equity interests acquired		100.00%
Operations commenced date		Jun. 10, 2005

Summary of Significant Accoun35

Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Interest and/or penalties related to income tax matters	$ 0	$ 0
Securities available for sale, at fair value	36,864,511		$ 41,471,711
Other investments	6,818,556		4,286,500
Assets	956,842,457		900,998,830
Liabilities	839,582,534		$ 809,518,880
ASU 2016-01
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Securities available for sale, at fair value	(2,500,000)
Other investments	2,500,000
ASU 2016-02
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Assets	12,000,000
Liabilities	$ 12,000,000
Equipment and Furnishings | Minimum
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Equipment and furnishings, useful lives	3 years
Equipment and Furnishings | Maximum
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Equipment and furnishings, useful lives	10 years

Securities - Schedule of Amorti

Securities - Schedule of Amortized Cost, Fair Value, and the Corresponding Amounts of Gross Unrealized Gains and Losses (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 37,975,842	$ 42,075,426
Gross Unrealized Gains		2,001
Gross Unrealized Losses	(1,111,331)	(605,716)
Securities available for sale, at fair value	36,864,511	41,471,711
U.S. Government Sponsored Agency Securities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	6,990,015	6,988,681
Gross Unrealized Gains		2,001
Gross Unrealized Losses	(121,935)	(58,674)
Securities available for sale, at fair value	6,868,080	6,932,008
Mortgage-backed Securities, Residential
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	13,379,005	14,109,433
Gross Unrealized Losses	(391,542)	(168,908)
Securities available for sale, at fair value	12,987,463	13,940,525
Collateralized Mortgage Obligations
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	17,606,822	18,458,814
Gross Unrealized Losses	(597,854)	(345,316)
Securities available for sale, at fair value	$ 17,008,968	18,113,498
Other Securities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost		2,518,498
Gross Unrealized Losses		(32,818)
Securities available for sale, at fair value		$ 2,485,680

Securities - Additional Informa

Securities - Additional Information (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Schedule Of Available For Sale Securities [Line Items]
Proceeds from sale of available-for-sale securities	$ 0	$ 0
Number of securities pledged as collateral	0		$ 0
Mutual fund - CRA qualified	2,532,056
Securities Available For Sale, At Fair Value | ASU 2016-01
Schedule Of Available For Sale Securities [Line Items]
Mutual fund - CRA qualified	(2,500,000)
Other Investments | ASU 2016-01
Schedule Of Available For Sale Securities [Line Items]
Mutual fund - CRA qualified	$ 2,500,000
Stockholder's Equity | Credit Concentration Risk | Non-US Government and Agency Securities
Schedule Of Available For Sale Securities [Line Items]
Concentration risk, percentage	10.00%		10.00%

Securities - Schedule of Amor38

Securities - Schedule of Amortized Cost and Estimated Fair Value of Securities Available for Sale (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Schedule Of Available For Sale Securities [Line Items]
One to five years, Amortized Cost	$ 6,990,015
One to five years, Fair Value	6,868,080
Available for sale, Amortized Cost	37,975,842	$ 42,075,426
Securities available for sale, at fair value	36,864,511	41,471,711
Mortgage-backed Securities, Residential
Schedule Of Available For Sale Securities [Line Items]
Available for sale, Amortized Cost	13,379,005	14,109,433
Securities available for sale, at fair value	12,987,463	$ 13,940,525
Collateralized Mortgage Obligations
Schedule Of Available For Sale Securities [Line Items]
Available for sale, Amortized Cost	17,606,822
Securities available for sale, at fair value	$ 17,008,968

Securities - Schedule of Securi

Securities - Schedule of Securities With Unrealized Losses (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Schedule Of Available For Sale Securities [Line Items]
Fair Value, Less Than 12 Months	$ 21,380,501	$ 24,039,476
Unrealized Losses, Less Than 12 Months	(569,067)	(275,646)
Fair Value, 12 Months or Longer	15,484,010	16,431,705
Unrealized Losses, 12 Months or Longer	(542,264)	(330,070)
Total Fair Value	36,864,511	40,471,181
Total Unrealized Losses	(1,111,331)	(605,716)
U.S. Government Sponsored Agency Securities
Schedule Of Available For Sale Securities [Line Items]
Fair Value, Less Than 12 Months	4,906,706	3,957,340
Unrealized Losses, Less Than 12 Months	(84,035)	(33,620)
Fair Value, 12 Months or Longer	1,961,374	1,974,139
Unrealized Losses, 12 Months or Longer	(37,900)	(25,054)
Total Fair Value	6,868,080	5,931,479
Total Unrealized Losses	(121,935)	(58,674)
Mortgage-backed Securities, Residential
Schedule Of Available For Sale Securities [Line Items]
Fair Value, Less Than 12 Months	7,352,009	7,954,428
Unrealized Losses, Less Than 12 Months	(189,372)	(70,965)
Fair Value, 12 Months or Longer	5,635,454	5,986,097
Unrealized Losses, 12 Months or Longer	(202,170)	(97,943)
Total Fair Value	12,987,463	13,940,525
Total Unrealized Losses	(391,542)	(168,908)
Collateralized Mortgage Obligations
Schedule Of Available For Sale Securities [Line Items]
Fair Value, Less Than 12 Months	9,121,786	9,642,028
Unrealized Losses, Less Than 12 Months	(295,660)	(138,243)
Fair Value, 12 Months or Longer	7,887,182	8,471,469
Unrealized Losses, 12 Months or Longer	(302,194)	(207,073)
Total Fair Value	17,008,968	18,113,497
Total Unrealized Losses	$ (597,854)	(345,316)
Other Securities
Schedule Of Available For Sale Securities [Line Items]
Fair Value, Less Than 12 Months		2,485,680
Unrealized Losses, Less Than 12 Months		(32,818)
Total Fair Value		2,485,680
Total Unrealized Losses		$ (32,818)

Securities - Schedule of Other

Securities - Schedule of Other Investments (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Investments Debt And Equity Securities [Abstract]
FHLB stock	$ 4,096,500	$ 4,096,500
PCBB stock	190,000	190,000
Mutual fund - CRA qualified	2,532,056
Total other investments	$ 6,818,556	$ 4,286,500

Loans - Composition of Loan Por

Loans - Composition of Loan Portfolio (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Loans And Leases Receivable Disclosure [Line Items]
Gross loans receivable	$ 793,751,030	$ 748,023,901
Loans receivable, allowance	9,716,168	9,139,488
Loans receivable, net	784,034,862	738,884,413
Real Estate
Loans And Leases Receivable Disclosure [Line Items]
Gross loans receivable	559,053,416	527,684,178
Real Estate | SBA Loans—Real Estate
Loans And Leases Receivable Disclosure [Line Items]
Gross loans receivable	103,390,716	106,924,278
Real Estate | Commercial Real Estate
Loans And Leases Receivable Disclosure [Line Items]
Gross loans receivable	455,662,700	420,759,900
SBA Loans—Non-Real Estate
Loans And Leases Receivable Disclosure [Line Items]
Gross loans receivable	10,100,567	8,634,879
Commercial and Industrial
Loans And Leases Receivable Disclosure [Line Items]
Gross loans receivable	114,746,789	103,681,574
Home Mortgage
Loans And Leases Receivable Disclosure [Line Items]
Gross loans receivable	106,187,527	104,067,756
Consumer
Loans And Leases Receivable Disclosure [Line Items]
Gross loans receivable	$ 3,662,731	$ 3,955,514

Loans - Additional Information

Loans - Additional Information (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2018USD ($)Contract	Dec. 31, 2017USD ($)Contract
Loans And Leases Receivable Disclosure [Line Items]
Loans	$ 0
Recorded investment in troubled debt restructurings	351,185	$ 353,985
Specific reserves to customers whose loan terms have been modified in troubled debt restructurings	$ 351,185	$ 353,985
Loans identified as trouble debt restructurings | Contract	0	0
Financing receivable, modifications, subsequent default, recorded investment	$ 0	$ 0
Principal Officers, Directors and Affiliates
Loans And Leases Receivable Disclosure [Line Items]
Loans		$ 10,768

Loans - Schedule of Activity in

Loans - Schedule of Activity in Allowance for Loan Losses (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance	$ 9,139,488	$ 7,909,682
Provision for loan losses	575,180	541,083
Charge-offs		(75,894)
Recoveries	1,500	5,225
Ending balance	9,716,168	8,380,096
Commercial Real Estate
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance	4,801,297	4,217,089
Provision for loan losses	410,996	1,898
Ending balance	5,212,293	4,218,987
SBA Loans—Real Estate
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance	1,082,065	892,605
Provision for loan losses	(76,299)	29,050
Ending balance	1,005,766	921,655
SBA Loans—Non-Real Estate
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance	537,967	59,032
Provision for loan losses	(39,340)	452,768
Charge-offs		(75,894)
Recoveries	1,500	5,225
Ending balance	500,127	441,131
Commercial and Industrial
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance	1,265,456	1,322,294
Provision for loan losses	315,765	(28,270)
Ending balance	1,581,221	1,294,024
Home Mortgage
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance	1,407,742	1,363,628
Provision for loan losses	(32,481)	88,140
Ending balance	1,375,261	1,451,768
Consumer
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance	44,961	55,034
Provision for loan losses	(3,461)	(2,503)
Ending balance	$ 41,500	$ 52,531

Loans - Schedule of Allowance f

Loans - Schedule of Allowance for Loan Losses and Recorded Investment in Loans by Portfolio Segment (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses Individually Evaluated for Impairment	$ 915,189	$ 353,985
Allowance for Loan Collectively Evaluated for Impairment	8,800,979	8,785,503
Total	9,716,168	9,139,488	$ 8,380,096	$ 7,909,682
Loans Individually Evaluated for Impairment	2,362,397	615,912
Loans Collectively Evaluated for Impairment	793,714,747	749,682,470
Total	796,077,144	750,298,382
Commercial Real Estate
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Collectively Evaluated for Impairment	5,212,293	4,801,297
Total	5,212,293	4,801,297	4,218,987	4,217,089
Loans Collectively Evaluated for Impairment	456,753,192	421,811,734
Total	456,753,192	421,811,734
SBA Loans—Real Estate
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Collectively Evaluated for Impairment	1,005,766	1,082,065
Total	1,005,766	1,082,065	921,655	892,605
Loans Collectively Evaluated for Impairment	103,902,484	107,427,788
Total	103,902,484	107,427,788
SBA Loans—Non-Real Estate
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses Individually Evaluated for Impairment	361,736
Allowance for Loan Collectively Evaluated for Impairment	138,391	537,967
Total	500,127	537,967	441,131	59,032
Loans Individually Evaluated for Impairment	361,736
Loans Collectively Evaluated for Impairment	9,756,228	8,655,808
Total	10,117,964	8,655,808
Commercial and Industrial
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses Individually Evaluated for Impairment	553,453	353,985
Allowance for Loan Collectively Evaluated for Impairment	1,027,768	911,471
Total	1,581,221	1,265,456	1,294,024	1,322,294
Loans Individually Evaluated for Impairment	1,759,498	353,985
Loans Collectively Evaluated for Impairment	113,260,683	103,601,098
Total	115,020,181	103,955,083
Home Mortgage
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Collectively Evaluated for Impairment	1,375,261	1,407,742
Total	1,375,261	1,407,742	1,451,768	1,363,628
Loans Individually Evaluated for Impairment	241,163	241,164
Loans Collectively Evaluated for Impairment	106,369,554	104,239,551
Total	106,610,717	104,480,715
Consumer
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Collectively Evaluated for Impairment	41,500	44,961
Total	41,500	44,961	$ 52,531	$ 55,034
Loans Individually Evaluated for Impairment		20,763
Loans Collectively Evaluated for Impairment	3,672,606	3,946,491
Total	$ 3,672,606	$ 3,967,254

Loans - Schedule of Information

Loans - Schedule of Information Related to Impaired Loans by Class of Loans (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Financing Receivable Impaired [Line Items]
Recorded investment	$ 2,362,397	$ 1,563,926
Allowance Allocated	915,189	752,436
Average Recorded Investment	2,375,319	1,567,266
Interest Income Recognized	24,096	15,191
Commercial and Industrial
Financing Receivable Impaired [Line Items]
Recorded investment, With no related allowance recorded	749,368
Recorded investment, With an allowance recorded	1,010,130	363,700
Allowance Allocated	553,453	363,700
Average Recorded Investment, With no related allowance recorded	749,368
Average Recorded Investment, With an allowance recorded	1,023,052	365,510
Interest Income Recognized, With no related allowance recorded	10,356
Interest Income Recognized, With an allowance recorded	13,740	3,926
Home Mortgage
Financing Receivable Impaired [Line Items]
Recorded investment, With no related allowance recorded	241,163	811,490
Average Recorded Investment, With no related allowance recorded	241,163	813,020
Interest Income Recognized, With no related allowance recorded		11,265
SBA Loans—Non-Real Estate
Financing Receivable Impaired [Line Items]
Recorded investment, With no related allowance recorded	361,736	388,736
Allowance Allocated	361,736	388,736
Average Recorded Investment, With no related allowance recorded	$ 361,736
Average Recorded Investment, With an allowance recorded		$ 388,736

Loans - Schedule of Recorded In

Loans - Schedule of Recorded Investment in Nonaccrual Loans and Loans Past Due Greater Than 90 Days Still Accruing Interest by Class of Loans (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable Recorded Investment Past Due [Line Items]
Nonaccrual	$ 241,163	$ 683,128
Total	241,163	683,128
Home Mortgage
Financing Receivable Recorded Investment Past Due [Line Items]
Nonaccrual	241,163	662,365
Total	$ 241,163	662,365
Consumer
Financing Receivable Recorded Investment Past Due [Line Items]
Nonaccrual		20,763
Total		$ 20,763

Loans - Schedule of Aging of Re

Loans - Schedule of Aging of Recorded Investment in Past Due Loans (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable Recorded Investment Past Due [Line Items]
Past Due Loans	$ 467,727	$ 863,782
Loans Not Past Due	795,609,417	749,434,600
Total	796,077,144	750,298,382
30-59 Days Pass Due
Financing Receivable Recorded Investment Past Due [Line Items]
Past Due Loans	226,564	201,417
> 90 Days Pass Due
Financing Receivable Recorded Investment Past Due [Line Items]
Past Due Loans	241,163	662,365
Commercial Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Not Past Due	456,753,192	421,811,734
Total	456,753,192	421,811,734
SBA Loans—Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Past Due Loans	139,659	139,806
Loans Not Past Due	103,762,825	107,287,982
Total	103,902,484	107,427,788
SBA Loans—Real Estate | 30-59 Days Pass Due
Financing Receivable Recorded Investment Past Due [Line Items]
Past Due Loans	139,659	139,806
SBA Loans—Non-Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Past Due Loans	86,905	61,611
Loans Not Past Due	10,031,059	8,594,197
Total	10,117,964	8,655,808
SBA Loans—Non-Real Estate | 30-59 Days Pass Due
Financing Receivable Recorded Investment Past Due [Line Items]
Past Due Loans	86,905	61,611
Commercial and Industrial
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Not Past Due	115,020,181	103,955,083
Total	115,020,181	103,955,083
Home Mortgage
Financing Receivable Recorded Investment Past Due [Line Items]
Past Due Loans	241,163	662,365
Loans Not Past Due	106,369,554	103,818,350
Total	106,610,717	104,480,715
Home Mortgage | > 90 Days Pass Due
Financing Receivable Recorded Investment Past Due [Line Items]
Past Due Loans	241,163	662,365
Consumer
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Not Past Due	3,672,606	3,967,254
Total	$ 3,672,606	$ 3,967,254

Loans - Schedule of Risk Catego

Loans - Schedule of Risk Category of Loans by Class of Loans (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable Recorded Investment [Line Items]
Total	$ 796,077,144	$ 750,298,382
Pass
Financing Receivable Recorded Investment [Line Items]
Total	792,614,381	748,178,014
Special Member
Financing Receivable Recorded Investment [Line Items]
Total	107,166	32,702
Substandard
Financing Receivable Recorded Investment [Line Items]
Total	3,355,597	2,087,666
Commercial Real Estate
Financing Receivable Recorded Investment [Line Items]
Total	456,753,192	421,811,734
Commercial Real Estate | Pass
Financing Receivable Recorded Investment [Line Items]
Total	456,753,192	421,811,734
SBA Loans—Real Estate
Financing Receivable Recorded Investment [Line Items]
Total	103,902,484	107,427,788
SBA Loans—Real Estate | Pass
Financing Receivable Recorded Investment [Line Items]
Total	102,575,944	106,405,966
SBA Loans—Real Estate | Substandard
Financing Receivable Recorded Investment [Line Items]
Total	1,326,540	1,021,822
SBA Loans—Non-Real Estate
Financing Receivable Recorded Investment [Line Items]
Total	10,117,964	8,655,808
SBA Loans—Non-Real Estate | Pass
Financing Receivable Recorded Investment [Line Items]
Total	9,982,402	8,594,375
SBA Loans—Non-Real Estate | Special Member
Financing Receivable Recorded Investment [Line Items]
Total	107,166	32,702
SBA Loans—Non-Real Estate | Substandard
Financing Receivable Recorded Investment [Line Items]
Total	28,396	28,731
Commercial and Industrial
Financing Receivable Recorded Investment [Line Items]
Total	115,020,181	103,955,083
Commercial and Industrial | Pass
Financing Receivable Recorded Investment [Line Items]
Total	113,260,683	103,601,098
Commercial and Industrial | Substandard
Financing Receivable Recorded Investment [Line Items]
Total	1,759,498	353,985
Home Mortgage
Financing Receivable Recorded Investment [Line Items]
Total	106,610,717	104,480,715
Home Mortgage | Pass
Financing Receivable Recorded Investment [Line Items]
Total	106,369,554	103,818,350
Home Mortgage | Substandard
Financing Receivable Recorded Investment [Line Items]
Total	241,163	662,365
Consumer
Financing Receivable Recorded Investment [Line Items]
Total	3,672,606	3,967,254
Consumer | Pass
Financing Receivable Recorded Investment [Line Items]
Total	$ 3,672,606	3,946,491
Consumer | Substandard
Financing Receivable Recorded Investment [Line Items]
Total		$ 20,763

Premises and Equipment - Schedu

Premises and Equipment - Schedule of Premises and Equipment (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Property Plant And Equipment [Line Items]
Total cost	$ 9,695,993	$ 9,231,318
Accumulated depreciation	(4,988,532)	(4,750,526)
Net book value	4,707,461	4,480,792
Leasehold Improvements
Property Plant And Equipment [Line Items]
Total cost	5,394,244	5,061,520
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Total cost	2,552,850	2,492,623
Equipment and Others
Property Plant And Equipment [Line Items]
Total cost	$ 1,748,899	$ 1,677,175

Premises and Equipment - Additi

Premises and Equipment - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Property Plant And Equipment [Abstract]
Depreciation expense	$ 240,416	$ 263,793

Servicing Assets - Additional I

Servicing Assets - Additional Information(Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Servicing Assets At Amortized Value [Line Items]
Valuation allowance against carrying value of servicing assets	$ 0	$ 0
Servicing asset at fair value, amount	$ 8,296,183	$ 8,940,415
Minimum
Servicing Assets At Amortized Value [Line Items]
Fair value of servicing assets, discount rates	4.15%	4.47%
Fair value of servicing assets, prepayment speed	11.10%	9.70%
Maximum
Servicing Assets At Amortized Value [Line Items]
Fair value of servicing assets, discount rates	10.40%	10.72%
Fair value of servicing assets, prepayment speed	11.80%	10.60%

Servicing Assets - Schedule of

Servicing Assets - Schedule of Activity for Loan Servicing Assets (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Servicing Asset [Abstract]
Beginning balance	$ 6,771,097	$ 6,782,555
Additions	377,562	479,654
Amortized to expense	(423,859)	(379,296)
Ending balance	$ 6,724,800	$ 6,882,913

Deposits - Additional Informati

Deposits - Additional Information (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Time Deposits [Line Items]
Time deposits greater than $250,000	$ 124,637,331	$ 108,952,059
Principal Officers, Directors and Affiliates
Time Deposits [Line Items]
Deposits from principal officers, directors, and their affiliates	$ 1,614,564	$ 1,068,580

Deposits - Schedule of Maturiti

Deposits - Schedule of Maturities of Time Deposits (Details)	Mar. 31, 2018USD ($)
Deposits [Abstract]
2018 remaining	$ 184,486,181
2,019	78,181,973
2,020	884,212
Thereafter	295,679
Total	$ 263,848,045

Borrowing Arrangements - Additi

Borrowing Arrangements - Additional Information (Details)	3 Months Ended
	Mar. 31, 2018USD ($)
Debt Disclosure [Abstract]
Federal Home Loan Bank Advances	$ 10,000,000
Federal Home Loan Bank Advances Maturity Date	Apr. 2, 2018
FHLB advances, interest rate at period end	1.87%
Line of Credit Facility, Maximum Borrowing Capacity	$ 49,000,000
Collateral pledged	$ 640,624,000

Borrowing Arrangements - Summar

Borrowing Arrangements - Summary of Borrowings Available to the Company from Institutions (Details)	Mar. 31, 2018USD ($)
Debt Disclosure [Line Items]
Amount of borrowings	$ 272,349,000
Federal Home Loan Bank—San Francisco
Debt Disclosure [Line Items]
Amount of borrowings	166,242,000
Federal Reserve Bank
Debt Disclosure [Line Items]
Amount of borrowings	96,607,000
Pacific Coast Bankers Bank
Debt Disclosure [Line Items]
Amount of borrowings	4,000,000
Zions Bank
Debt Disclosure [Line Items]
Amount of borrowings	$ 5,500,000

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended			12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Federal corporate tax rate	21.00%			35.00%
Reduction in net deferred tax assets		$ 1,300,000
Income tax expense	$ 1,169,323		$ 1,375,186
Effective income tax rate	26.70%		39.10%
Unrealized tax benefits	$ 0		$ 0

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Commitments And Contingencies Disclosure [Abstract]
Operating lease rent expense	$ 521,782	$ 471,884

Commitments and Contingencies59

Commitments and Contingencies - Summary of Rent Commitments Related to Lease (Details)	Mar. 31, 2018USD ($)
Commitments And Contingencies Disclosure [Abstract]
2018 remaining	$ 1,231,143
2,019	1,737,769
2,020	1,779,970
2,021	1,830,979
2,022	1,825,952
Thereafter	3,797,971
Total	$ 12,203,784

Commitments and Contingencies60

Commitments and Contingencies - Summary of Distribution of Undisbursed Loan Commitments (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Undisbursed loan commitments	$ 56,476,000	$ 63,983,000
Standby Letter of Credit
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Undisbursed loan commitments	1,937,000	1,627,000
Commercial Letter of Credit
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Undisbursed loan commitments	1,479,000	1,608,000
Commitments to Extend Credit
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Undisbursed loan commitments	$ 53,060,000	$ 60,748,000

Stock-based Compensation - Addi

Stock-based Compensation - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2013	Dec. 31, 2012
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation expense	$ 245,968	$ 179,289
2005 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation shares authorized under stock option plans	770,000
Percent of the fair value options granted	100.00%
Stock options granted	0	0
Shares available for grant	0
Weighted average remaining contractual term stock options outstanding	3 years 3 months 21 days
Weighted average remaining contractual life for options exercisable	3 years 1 month 13 days
Unrecognized compensation costs related to unvested stock options	$ 15,983
Unrecognized compensation costs weighted average period	6 months
2010 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation shares authorized under stock option plans	218,605		2,500,000	1,350,000
Percent of the fair value options granted	100.00%
Stock options granted	0	0
Weighted average remaining contractual term stock options outstanding	3 years 6 months
Weighted average remaining contractual life for options exercisable	3 years 10 days
Unrecognized compensation costs related to unvested stock options		$ 2,264,155
Unrecognized compensation costs weighted average period		2 years 1 month 17 days
Stock options vesting period	5 years
Stock options grant and expire	10 years
Number of stock options vested	0
2010 Plan | Restricted Stock Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of restricted stock awards vested	0

Stock-based Compensation - Summ

Stock-based Compensation - Summary of Stock-based Compensation Stock Options Activity (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
2005 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of options outstanding, Beginning of period	335,000
Stock options granted	0	0
Number of options outstanding, Ending of year	335,000
Number of options outstanding, Full vested and expected to vest	328,500
Number of options outstanding, Vested	309,000
Weighted average exercise price, Outstanding beginning	$ 3.99
Weighted average exercise price, Outstanding ending	3.99
Weighted average exercise price, Full vested and expected to vest	3.95
Weighted average exercise price, Vested	$ 3.81
Aggregate intrinsic value, Outstanding	$ 2,832,700
Aggregate intrinsic value, Fully vested and expected to vest	2,791,960
Aggregate intrinsic value, Vested	$ 2,669,740
2010 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of options outstanding, Beginning of period	795,000
Stock options granted	0	0
Number of options outstanding, Exercised	(40,000)
Number of options outstanding, Ending of year	755,000
Number of options outstanding, Full vested and expected to vest	725,000
Number of options outstanding, Vested	635,000
Weighted average exercise price, Outstanding beginning	$ 4.22
Weighted average exercise price, Exercised	2.85
Weighted average exercise price, Outstanding ending	4.29
Weighted average exercise price, Full vested and expected to vest	4.14
Weighted average exercise price, Vested	$ 3.59
Aggregate intrinsic value, Outstanding	$ 6,160,100
Aggregate intrinsic value, Fully vested and expected to vest	6,026,600
Aggregate intrinsic value, Vested	$ 5,626,100

Stock-based Compensation - Su63

Stock-based Compensation - Summary of Information Related to Stock Option Plan (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Cash received from stock option exercises	$ 114,000	$ 190,250
2005 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Intrinsic value of options exercised		115,250
Cash received from stock option exercises		76,250
2010 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Intrinsic value of options exercised	286,000	176,000
Cash received from stock option exercises	114,000	114,000
Tax benefit realized from option exercised	$ 72,608	57,020
2010 Plan | Restricted Stock Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Tax benefit realized from awards vested		$ 91,080

Stock-based Compensation - Su64

Stock-based Compensation - Summary of Changes in Non-vested Restricted Stock Awards (Details) - 2010 Plan - Restricted Stock Awards	3 Months Ended
	Mar. 31, 2018USD ($)$ / sharesshares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares issued, Non-vested beginning of period	453,500
Shares issued, Awards vested	0
Shares issued, Non-vested end of period	453,500
Weighted average grant date fair value, Non-vested beginning of period | $ / shares	$ 5.95
Weighted average grant date fair value, Non-vested end of period | $ / shares	$ 5.95
Aggregate intrinsic value, Non-vested end of year | $	$ 5,646,075

Revenue Recognition - Additiona

Revenue Recognition - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Service charges on deposits	$ 537,445	$ 419,735
Noninterest income	2,212,320	$ 2,243,819
Gains (losses) on sale of OREO	0
Service Fees and Transaction-Based Fees Income
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Service charges on deposits	$ 193,000
Percentage on revenue	1.60%
Overdraft and NSF Fees Income
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Service charges on deposits	$ 344,000
Percentage on revenue	2.90%
Wire Transfer Fee Income
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Percentage on revenue	0.70%
Noninterest income	$ 77,000

Fair Value of Financial Instr66

Fair Value of Financial Instruments - Summary of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Other investments:
Mutual fund - CRA qualified	$ 2,532,056
Fair Value, Measurements, Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
U.S. Government sponsored agency securities	6,868,080	$ 6,932,008
Mortgage-backed securities - residential	12,987,463	13,940,525
Collateralized mortgage obligations	17,008,968	18,113,498
Other investments:
Mutual fund - CRA qualified	2,532,056
Other securities		2,485,680
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets (Level 1)
Other investments:
Mutual fund - CRA qualified	2,532,056
Other securities		2,485,680
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
U.S. Government sponsored agency securities	6,868,080	6,932,008
Mortgage-backed securities - residential	12,987,463	13,940,525
Collateralized mortgage obligations	$ 17,008,968	$ 18,113,498

Fair Value of Financial Instr67

Fair Value of Financial Instruments - Additional Information (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Fair value assets transfers between level 1 to level 2	$ 0	$ 0
Fair value liabilities transfers between level 1 to level 2	0	0
Assets measured at fair value on a nonrecurring basis	0	0
Liabilities measured at fair value on a nonrecurring basis	$ 0	$ 0

Fair Value Measurements - Carry

Fair Value Measurements - Carrying Amounts and Estimated Fair Values of Financial Instruments (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Financial Assets:
Cash and cash equivalents	$ 69,899,816	$ 63,249,952
Loans held for sale	20,270,185	17,203,060
Loans receivable, net	779,565,863	731,436,572
Accrued interest receivable	2,503,721	2,463,486
Other investments:
Mutual fund - CRA qualified	2,532,056
Financial Liabilities:
Deposit	817,655,673	773,071,521
FHLB Advances	10,000,000	25,000,000
Accrued interest payable	557,559	423,239
Carrying Amount
Financial Assets:
Cash and cash equivalents	69,899,816	63,249,952
Loans held for sale	18,570,944	15,739,305
Loans receivable, net	784,034,862	738,884,413
Accrued interest receivable	2,503,721	2,463,486
Other investments:
FHLB and PCBB stock	4,286,500	4,286,500
Financial Liabilities:
Deposit	818,279,718	773,306,014
FHLB Advances	10,000,000	25,000,000
Accrued interest payable	557,559	423,239
Level 1
Financial Assets:
Cash and cash equivalents	69,899,816	63,249,952
Level 2
Financial Assets:
Loans held for sale	20,270,185	17,203,060
Accrued interest receivable	177,607	189,005
Financial Liabilities:
Deposit	817,655,673	773,071,521
FHLB Advances	10,000,000	25,000,000
Accrued interest payable	557,559	423,239
Level 3
Financial Assets:
Loans receivable, net	779,565,863	731,436,572
Accrued interest receivable	$ 2,326,114	$ 2,274,481

Regulatory Capital Matters - Ad

Regulatory Capital Matters - Additional Information (Details)	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Capital conservation buffer				1.25%	0.625%	0.00%
Capital conservation buffer description	The capital conservation buffer is being phased in from 0.0% for 2015 to 2.50% by 2019. The capital conservation buffers for 2016, 2017 and 2018 are 0.625%, 1.25% and 1.875%, respectively.
Scenario Forecast
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Capital conservation buffer		2.50%	1.875%

Regulatory Capital Matters - Su

Regulatory Capital Matters - Summary of Actual and Required Capital Amounts and Ratios, Exclusive of Capital Conservation Buffer (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Capital conservation buffer		1.25%	0.625%	0.00%
Consolidated
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total capital (to risk-weighted assets), Actual Amount	$ 127,461	$ 100,713
Tier 1 capital (to risk-weighted assets), Actual Amount	117,681	91,510
Common equity Tier 1 capital (to risk-weighted assets), Actual Amount	117,681	91,510
Tier 1 capital (to average assets), Actual Amount	$ 117,681	$ 91,510
Total capital (to risk-weighted assets), Actual Ratio	16.17%	13.49%
Tier 1 capital (to risk-weighted assets), Actual Ratio	14.93%	12.26%
Common equity Tier 1 capital (to risk-weighted assets), Actual Ratio	14.93%	12.26%
Tier 1 capital (to average assets), Actual Ratio	13.09%	10.46%
Total capital (to risk-weighted assets), Amount, Required for Capital Adequacy Purposes	$ 63,057	$ 59,729
Tier 1 capital (to risk-weighted assets), Amount, Required for Capital Adequacy Purposes	47,292	44,797
Common equity Tier 1 capital (to risk-weighted assets), Amount, Required for Capital Adequacy Purposes	35,469	33,597
Tier 1 capital (to average assets), Amount, Required for Capital Adequacy Purposes	$ 35,962	$ 35,009
Capital conservation buffer	8.00%	8.00%
Tier 1 capital (to risk-weighted assets), Ratio, Required for Capital Adequacy Purposes	6.00%	6.00%
Common equity Tier 1 capital (to risk-weighted assets), Ratio, Required for Capital Adequacy Purposes	4.50%	4.50%
Tier 1 capital (to average assets), Ratio, Required for Capital Adequacy Purposes	4.00%	4.00%
Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total capital (to risk-weighted assets), Actual Amount	$ 127,394	$ 100,648
Tier 1 capital (to risk-weighted assets), Actual Amount	117,614	91,445
Common equity Tier 1 capital (to risk-weighted assets), Actual Amount	117,614	91,445
Tier 1 capital (to average assets), Actual Amount	$ 117,614	$ 91,445
Total capital (to risk-weighted assets), Actual Ratio	16.16%	13.48%
Tier 1 capital (to risk-weighted assets), Actual Ratio	14.92%	12.25%
Common equity Tier 1 capital (to risk-weighted assets), Actual Ratio	14.92%	12.25%
Tier 1 capital (to average assets), Actual Ratio	13.09%	10.45%
Total capital (to risk-weighted assets), Amount, Required for Capital Adequacy Purposes	$ 63,051	$ 59,726
Tier 1 capital (to risk-weighted assets), Amount, Required for Capital Adequacy Purposes	47,288	44,795
Common equity Tier 1 capital (to risk-weighted assets), Amount, Required for Capital Adequacy Purposes	35,466	33,596
Tier 1 capital (to average assets), Amount, Required for Capital Adequacy Purposes	$ 35,950	$ 35,007
Capital conservation buffer	8.00%	8.00%
Tier 1 capital (to risk-weighted assets), Ratio, Required for Capital Adequacy Purposes	6.00%	6.00%
Common equity Tier 1 capital (to risk-weighted assets), Ratio, Required for Capital Adequacy Purposes	4.50%	4.50%
Tier 1 capital (to average assets), Ratio, Required for Capital Adequacy Purposes	4.00%	4.00%
Total capital (to risk-weighted assets), Amount, Minimum To be Considered "Well Capitalized"	$ 78,814	$ 74,658
Tier 1 capital (to risk-weighted assets), Amount, Minimum To be Considered "Well Capitalized"	63,051	59,726
Common equity Tier 1 capital (to risk-weighted assets), Amount, Minimum To be Considered "Well Capitalized"	51,229	48,528
Tier 1 capital (to average assets), Amount, Minimum To be Considered "Well Capitalized"	$ 44,938	$ 43,759
Total capital (to risk-weighted assets), Ratio, Minimum To be Considered "Well Capitalized"	10.00%	10.00%
Tier 1 capital (to risk-weighted assets), Ratio, Minimum To be Considered "Well Capitalized"	8.00%	8.00%
Common equity Tier 1 capital (to risk-weighted assets), Ratio, Minimum To be Considered "Well Capitalized"	6.50%	6.50%
Tier 1 capital (to average assets), Ratio, Minimum To be Considered "Well Capitalized"	5.00%	5.00%

Earnings Per Share - Computatio

Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Basic
Net income	$ 3,215,935	$ 2,145,687
Undistributed earnings allocated to participating securities	(106,101)	(98,007)
Net income allocated to common shares	$ 3,109,834	$ 2,047,680
Weighted average common shares outstanding	13,292,083	12,925,946
Basic earnings per common share	$ 0.23	$ 0.16
Diluted
Net income allocated to common shares	$ 3,109,834	$ 2,047,680
Weighted average common shares outstanding	13,292,083	12,925,946
Add: Dilutive effects of assumed exercises of stock options	534,873	415,349
Average shares and dilutive potential common shares	13,826,956	13,341,295
Diluted earnings per common share	$ 0.22	$ 0.15

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Details) - shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive shares of common stock excluded from computation of earnings per share	0
Stock Options and Restricted Stock Awards
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive shares of common stock excluded from computation of earnings per share		525,000