Middlefield Banc (MBCN) 10-K 4 Mar 20 2019 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Mar. 04, 2020	Jun. 30, 2019
Document Information [Line Items]
Entity Registrant Name	Middlefield Banc Corp.
Entity Central Index Key	0000836147
Trading Symbol	mbcn
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Emerging Growth Company	false
Entity Small Business	true
Entity Interactive Data Current	Yes
Entity Common Stock, Shares Outstanding (in shares)		6,427,667
Entity Public Float			$ 123.9
Entity Shell Company	false
Document Type	10-K
Document Period End Date	Dec. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Amendment Flag	false
Title of 12(b) Security	Common Stock, Without Par Value

Consolidated Balance Sheet

Consolidated Balance Sheet - USD ($)	Dec. 31, 2019	Dec. 31, 2018
ASSETS
Cash and cash equivalents	$ 35,113,000	$ 107,933,000
Equity securities, at fair value	710,000	616,000
Investment securities available for sale, at fair value	105,733,000	98,322,000
Loans held for sale	1,220,000	597,000
Loans:
Loans	984,258,000	992,109,000
Less allowance for loan and lease losses	6,768,000	7,428,000
Net loans	977,490,000	984,681,000
Premises and equipment, net	17,874,000	13,003,000
Goodwill	15,071,000	15,071,000
Core deposit intangibles	2,056,000	2,397,000
Bank-owned life insurance	16,511,000	16,080,000
Accrued interest receivable and other assets	10,697,000	9,698,000
TOTAL ASSETS	1,182,475,000	1,248,398,000
LIABILITIES
Noninterest-bearing demand	191,370,000	203,410,000
Interest-bearing demand	107,844,000	92,104,000
Money market	160,826,000	196,685,000
Savings	192,003,000	222,954,000
Time	368,800,000	300,914,000
Total deposits	1,020,843,000	1,016,067,000
Short-term borrowings:
Federal funds purchased	75,000	398,000
Federal Home Loan Bank advances	5,000,000	90,000,000
Total short-term borrowings	5,075,000	90,398,000
Other borrowings	12,750,000	8,803,000
Accrued interest payable and other liabilities	6,032,000	4,840,000
TOTAL LIABILITIES	1,044,700,000	1,120,108,000
STOCKHOLDERS' EQUITY
Common stock, no par value; 10,000,000 shares authorized, 7,294,792 and 7,260,994 shares issued; 6,423,630 and 6,488,664 shares outstanding	86,617,000	85,925,000
Retained earnings	65,063,000	56,037,000
Accumulated other comprehensive income (loss)	1,842,000	(154,000)
Treasury stock, at cost; 871,162 and 772,330 shares	(15,747,000)	(13,518,000)
TOTAL STOCKHOLDERS' EQUITY	137,775,000	128,290,000
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	1,182,475,000	1,248,398,000
Commercial And Industrial [Member]
Loans:
Loans	89,527,000	83,857,000
Less allowance for loan and lease losses	456,000	969,000
Real Estate Construction Porfolio Segment [Member]
Loans:
Loans	63,246,000	56,731,000
Less allowance for loan and lease losses	97,000	100,000
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member]
Loans:
Loans	347,047,000	336,487,000
Less allowance for loan and lease losses	1,658,000	1,581,000
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member]
Loans:
Loans	470,027,000	498,247,000
Less allowance for loan and lease losses	4,529,000	4,651,000
Consumer Portfolio Segment [Member]
Loans:
Loans	14,411,000	16,787,000
Less allowance for loan and lease losses	$ 28,000	$ 127,000

Consolidated Balance Sheet (Par

Consolidated Balance Sheet (Parentheticals) - $ / shares $ / shares in Thousands	Dec. 31, 2019	Dec. 31, 2018
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	10,000,000	10,000,000
Common stock, shares issued (in shares)	7,294,792	7,260,994
Common stock, shares outstanding (in shares)	6,423,630	6,488,664
Treasury stock, shares (in shares)	871,162	772,330

Consolidated Statement of Incom

Consolidated Statement of Income - USD ($)		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
INTEREST AND DIVIDEND INCOME
Interest and fees on loans		$ 50,390,000	$ 46,576,000
Interest-earning deposits in other institutions		673,000	558,000
Federal funds sold		78,000	46,000
Investment securities:
Taxable interest		796,000	688,000
Tax-exempt interest		2,392,000	2,262,000
Dividends on stock		196,000	227,000
Total interest and dividend income		54,525,000	50,357,000
INTEREST EXPENSE
Deposits		12,409,000	8,631,000
Short-term borrowings		368,000	842,000
Other borrowings		363,000	436,000
Total interest expense		13,140,000	9,909,000
NET INTEREST INCOME		41,385,000	40,448,000
Provision for loan losses		890,000	840,000
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES		40,495,000	39,608,000
NONINTEREST INCOME
Investment securities gains on sale, net	[1]	194,000
Gain (loss) on equity securities	[1]	94,000	(9,000)
Earnings on bank-owned life insurance	[1]	431,000	428,000
Gain on sale of loans	[1]	433,000	231,000
Total noninterest income		4,841,000	3,728,000
NONINTEREST EXPENSE
Salaries and employee benefits		16,523,000	15,749,000
Occupancy expense		2,164,000	1,933,000
Equipment expense		1,040,000	969,000
Data processing costs		2,208,000	1,806,000
Ohio state franchise tax		1,044,000	823,000
Federal deposit insurance expense		230,000	550,000
Professional fees		1,683,000	1,482,000
Advertising expense		733,000	921,000
Software amortization expense		638,000	605,000
Core deposit intangible amortization		341,000	352,000
Other expense		3,429,000	3,553,000
Total noninterest expense		30,033,000	28,743,000
Income before income taxes		15,303,000	14,593,000
Income taxes		2,592,000	2,162,000
NET INCOME		$ 12,711,000	$ 12,431,000
EARNINGS PER SHARE
Basic (in dollars per share)		$ 1.96	$ 1.92
Diluted (in dollars per share)		$ 1.95	$ 1.91
Deposit Account [Member]
NONINTEREST INCOME
Noninterest income revenue		$ 2,186,000	$ 1,914,000
Financial Service, Other [Member]
NONINTEREST INCOME
Noninterest income revenue		$ 1,503,000	$ 1,164,000
[1]	Not within scope of ASC 606

Consolidated Statement of Compr

Consolidated Statement of Comprehensive Income - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Net income	$ 12,711,000	$ 12,431,000
Net unrealized holding gain (loss) on available- for-sale investment securities	2,720,000	(1,636,000)
Tax effect	(571,000)	345,000
Reclassification adjustment for investment securities gains included in net income	(194,000)
Tax effect	41,000	0
Total other comprehensive income (loss)	1,996,000	(1,291,000)
Comprehensive income	$ 14,707,000	$ 11,140,000

Consolidated Statement of Chang

Consolidated Statement of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock [Member]	Total
Balance (in shares) at Dec. 31, 2017	7,207,762
Balance at Dec. 31, 2017	$ 84,859	$ 47,431	$ 1,091	$ (13,518)	$ 119,863
Change in accounting principle, ASC 2016-01		141	(141)
Change in accounting principle, ASC 2018-02		(187)	187
Net income		12,431			12,431
Other comprehensive income (loss)			(1,291)		(1,291)
Dividend reinvestment and purchase plan (in shares)	24,512
Dividend reinvestment and purchase plan	$ 618				$ 618
Stock options exercised (in shares)	17,600				24,600
Stock options exercised	$ 168				$ 168
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture, Total	11,120
Stock-based compensation	$ 280				280
Cash dividends		(3,779)			$ (3,779)
Balance (in shares) at Dec. 31, 2018	7,260,994				6,488,664
Balance at Dec. 31, 2018	$ 85,925	56,037	(154)	(13,518)	$ 128,290
Net income		12,711			12,711
Other comprehensive income (loss)			1,996		1,996
Dividend reinvestment and purchase plan (in shares)	17,866
Dividend reinvestment and purchase plan	$ 372				$ 372
Stock options exercised (in shares)	400				400
Stock options exercised	$ 4				$ 4
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture, Total	15,532
Stock-based compensation	$ 316				316
Cash dividends		(3,685)			(3,685)
Treasury shares acquired				(2,229)	$ (2,229)
Balance (in shares) at Dec. 31, 2019	7,294,792				6,423,630
Balance at Dec. 31, 2019	$ 86,617	$ 65,063	$ 1,842	$ (15,747)	$ 137,775

Consolidated Statement of Cha_2

Consolidated Statement of Changes in Stockholders' Equity (Parentheticals) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Retained Earnings [Member]
Cash dividends per share (in dollars per share)		$ 0.59
Cash dividends per share (in dollars per share)	$ 0.57
Treasury acquired, shares (in shares)	98,832

Consolidated Statement of Cash

Consolidated Statement of Cash Flows - USD ($)		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
OPERATING ACTIVITIES
Net income		$ 12,711,000	$ 12,431,000
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses		890,000	840,000
Investment securities gains on sale, net	[1]	(194,000)
(Gain) loss on equity securities	[1]	(94,000)	9,000
Depreciation and amortization of premises and equipment, net		1,039,000	951,000
Software amortization expense		638,000	605,000
Financing lease amortization expense		360,000
Amortization of premium and discount on investment securities, net		259,000	419,000
Accretion of deferred loan fees, net		(753,000)	(868,000)
Amortization of core deposit intangibles		341,000	352,000
Stock-based compensation expense		644,000	467,000
Origination of loans held for sale		(19,845,000)	(13,196,000)
Proceeds from sale of loans		19,655,000	13,293,000
Gain on sale of loans		(433,000)	(231,000)
Earnings on bank-owned life insurance	[1]	(431,000)	(428,000)
Deferred income tax		327,000	(241,000)
Net gain on other real estate owned		(123,000)	(55,000)
Decrease (increase) in accrued interest receivable		162,000	(345,000)
Increase in accrued interest payable		173,000	166,000
Other, net		(1,867,000)	112,000
Net cash provided by operating activities		13,459,000	14,281,000
INVESTING ACTIVITIES
Proceeds from repayments and maturities		17,687,000	7,280,000
Proceeds from sale of securities		12,324,000	0
Purchases		(34,961,000)	(12,999,000)
Decrease (increase) in loans, net		6,932,000	(68,796,000)
Proceeds from the sale of other real estate owned		360,000	163,000
Purchase of premises and equipment		(1,897,000)	(2,101,000)
Purchase of restricted stock		(169,000)	(90,000)
Net cash provided by (used in) investing activities		276,000	(76,543,000)
FINANCING ACTIVITIES
Net increase in deposits		4,776,000	137,873,000
(Decrease) increase in short-term borrowings, net		(85,323,000)	15,691,000
Net repayment of other borrowings		(426,000)	(20,262,000)
Restricted stock cash portion		(44,000)
Stock options exercised		4,000	168,000
Proceeds from dividend reinvestment and purchase plan		372,000	618,000
Repurchase of treasury shares		(2,229,000)
Cash dividends		(3,685,000)	(3,779,000)
Net cash (used in) provided by financing activities		(86,555,000)	130,309,000
(Decrease) increase in cash and cash equivalents		(72,820,000)	68,047,000
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR		107,933,000	39,886,000
CASH AND CASH EQUIVALENTS AT END OF YEAR		35,113,000	107,933,000
Cash paid during the year for:
Interest on deposits and borrowings		12,967,000	9,743,000
Income taxes		2,705,000	2,125,000
Noncash operating transactions:
Operating lease assets added to other, net		(1,071,000)
Operating lease liabilities added to other, net		1,071,000
Noncash investing transactions:
Transfers from loans to other real estate owned		122,000	166,000
Transfer of equity securities from investment securities available for sale, at fair value			(625,000)
Finance lease assets added to premises and equipment		(4,373,000)
Noncash financing transactions:
Finance lease liabilities added to borrowed funds		$ 4,373,000
[1]	Not within scope of ASC 606

Note 1 - Summary of Significant

Note 1 - Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Significant Accounting Policies [Text Block]	1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES A summary of the significant accounting and reporting policies applied in the presentation of the accompanying financial statements follows: Nature of Operations and Basis of Presenta tion Middlefield Banc Corp. (the “Company”) is an Ohio corporation organized to become the holding company of The Middlefield Banking Company (“MBC”). MBC is a state-chartered bank located in Ohio, whose consolidated financial statements also include the accounts of MBC’s subsidiary, Middlefield Investments, Inc. (MI), established March 13, 2019. October 23, 2009, sixteen The consolidated financial statements of the Company include its wholly owned subsidiaries, MBC and EMORECO, Inc. Significant intercompany items have been eliminated in preparing the consolidated financial statements. The financial statements have been prepared in conformity with U.S. Generally Accepted Accounting Principles. In preparing the financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the balance sheet date and revenues and expenses for the period. Actual results could differ from those estimates. Investment and Equity Securities Investment securities are classified at the time of purchase, based on management’s intention and ability, as securities held to maturity or securities available for sale. Debt securities acquired with the intent and ability to hold to maturity are stated at cost adjusted for amortization of premium and accretion of discount, which are computed using a level yield method and recognized as adjustments of interest income. Certain other debt securities have been classified as available for sale to serve principally as a source of liquidity. Unrealized holding gains and losses for available-for-sale securities are reported as a separate component of stockholders’ equity, net of tax, until realized. Realized security gains and losses are computed using the specific identification method. Interest and dividends on investment securities are recognized as income when earned. For 2019 2018, Securities are evaluated on at least a quarterly basis and more frequently when economic or market conditions warrant such an evaluation to determine whether a decline in their value is other than temporary. For debt securities, management considers whether the present value of cash flows expected to be collected is less than the security’s amortized cost basis (the difference defined as the credit loss), the magnitude and duration of the decline, the reasons underlying the decline and the Bank’s intent to sell the security or whether it is more likely than not not not not one not Restricted Stock Common stock of the Federal Home Loan Bank (“FHLB”) represents ownership in an institution that is wholly owned by other financial institutions. This equity security is accounted for at cost and classified with other assets. The FHLB of Cincinnati has reported profits for 2019 2018, not December 31, 2019 2018. Mortgage Banking Activities Mortgage loans originated and intended for sale in the secondary market are carried at fair value. The Bank sells the loans on a servicing retained basis. Servicing rights are initially recorded at fair value with the income statement effect recorded in gains on sales of loans. The Bank measures servicing assets using the amortization method. Fair value is based on market prices for comparable mortgage servicing contracts, when available, or alternatively, is based on a valuation model that calculates the present value of estimated future net servicing income. Loan servicing rights are amortized in proportion to and over the period of estimated net future servicing revenue. The expected period of the estimated net servicing income is based in part on the expected prepayment of the underlying mortgages. The unamortized balance of mortgage servicing rights is included in accrued interest and other assets on the Consolidated Balance Sheet. Mortgage servicing rights are periodically evaluated for impairment. Impairment represents the excess of amortized cost over its estimated fair value. Impairment is determined by stratifying rights into tranches based on predominant risk characteristics, such as interest rate and original time to maturity. Any impairment is reported as a valuation allowance for an individual tranche. If the Company later determines that all or a portion of the impairment no Servicing fee income is recorded for fees earned for servicing loans. The fees are based on a contractual percentage of outstanding principal and are recorded as income when earned. The amortization of mortgage servicing rights is netted against loan servicing fee income. Late fees and ancillary fees related to loan servicing are not $70.8 $59.4 December 31, 2019 2018, Loans Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff generally are reported at their outstanding unpaid principal balances net of the allowance for loan and lease losses. Interest income is recognized as income when earned on the accrual method. The accrual of interest is discontinued on a loan when management believes, after considering economic and business conditions, the borrower’s financial condition is such that collection of interest is doubtful. Interest received on nonaccrual loans is recorded as income or applied against principal according to management’s judgment as to the collectability of such principal. Loan origination fees and certain direct loan origination costs are being deferred and the net amount amortized as an adjustment of the related loan’s yield. Management is amortizing these amounts over the contractual life of the related loans. Allowance for Loan and Lease Losses The allowance for loan and lease losses represents the amount which management estimates is adequate to provide for probable loan losses inherent in the loan portfolio. The allowance method is used in providing for loan losses. Accordingly, all loan losses are charged to the allowance, and all recoveries are credited to it. The allowance for loan and lease losses is established through a provision for loan losses which is charged to operations. The provision is based on management’s periodic evaluation of the adequacy of the allowance for loan and lease losses, which encompasses the overall risk characteristics of the various portfolio segments, past experience with losses, the impact of economic conditions on borrowers, and other relevant factors. The estimates used in determining the adequacy of the allowance for loan and lease losses, including the amounts and timing of future cash flows expected on impaired loans, are particularly susceptible to significant change in the near term. A loan is considered impaired when it is probable the borrower will not 89 not not first Mortgage loans secured by one four Loans Acquired Loans acquired, including loans that have evidence of deterioration of credit quality since origination and for which it is probable, at acquisition, that the Company will be unable to collect all contractually required payments receivable, are initially recorded at fair value (as determined by the present value of expected future cash flows) with no not For purchased loans acquired that are not Premises and Equipment Land is carried at cost. Premises and equipment are stated at cost net of accumulated depreciation. Depreciation is computed on the straight-line method over the estimated useful lives of the assets, which range from 3 20 3 40 Leases The Company has operating and financing leases for several branch locations and office space. Generally, the underlying lease agreements do not may may one Most leases include one As most of our leases do not Goodwill The Company accounts for goodwill using a two No Intangible Assets Intangible assets include core deposit intangibles, which are a measure of the value of consumer demand and savings deposits acquired in business combinations accounted for as purchases. The core deposit intangibles are being amortized to their estimated residual values over their expected useful lives, commonly of ten Bank-Owned Life Insurance (“BOLI”) The Company owns insurance on the lives of a certain group of key employees. The policies were purchased to help offset the increase in the costs of various fringe benefit plans including healthcare. The cash surrender value of these policies is included as an asset on the Consolidated Balance Sheet and any increases in the cash surrender value are recorded as noninterest income on the Consolidated Statement of Income. In the event of the death of an insured individual under these policies, the Company would receive a death benefit, which would be recorded as tax-free noninterest income. Other Real Estate Owned Real estate properties acquired through foreclosure are initially recorded at fair value at the date of foreclosure, establishing a new cost basis. After foreclosure, management periodically performs valuations and the real estate is carried at the lower of cost or fair value less estimated cost to sell. Revenue and expenses from operations of the properties, gains or losses on sales and additions to the valuation allowance are included in operating results. Income Taxes The Company and its subsidiaries file a consolidated federal income tax return. Deferred tax assets and liabilities are reflected at currently enacted income tax rates applicable to the period in which the deferred tax assets or liabilities are expected to be realized or settled. As changes in tax laws or rates are enacted, deferred tax assets and liabilities are adjusted through the provision for income taxes. Earnings Per Share The Company provides dual presentation of basic and diluted earnings per share. Basic earnings per share is calculated utilizing net income as reported in the numerator and average shares outstanding in the denominator. The computation of diluted earnings per share differs in that the dilutive effects of any stock options, warrants, and convertible securities are adjusted in the denominator. Earnings and dividends per share are restated for all stock splits and stock dividends through the date of issuance of the financial statements. (See Note 20 Stock-Based Compensation The Company accounts for stock compensation based on the grant date fair value of all share-based payment awards that are expected to vest, including employee share options to be recognized as employee compensation expense over the requisite service period. Compensation cost is recognized for restricted stock issued to employees based on the fair value of these awards at the date of grant. The market price of the Company’s common shares at the date of grant is used to estimate the fair value of restricted stock and stock awards. Compensation cost is recognized over the required service period, generally defined as the vesting period, and is recorded in "Salaries and employee benefits" expense. (See Note 14 Cash Flow Information The Company has defined cash and cash equivalents as those amounts included in the Consolidated Balance Sheet captions as “Cash and due from banks” and “Federal funds sold” with original maturities of less than 90 Advertising Costs Advertising costs are expensed as incurred. Reclassification of Comparative Amounts Certain comparative amounts for prior years have been reclassified to conform to current-year presentations. Such reclassifications did not Recently Adopted Accounting Pronouncements - In May 2014, 2014 09, Revenue from Contracts with Customers not not 606. January 1, 2018, 2. In January 2016, 2016 01, Financial Instruments – Overall (Subtopic 825 10 not January 1, 2018, 2016 01 $141,000 18 December 31, 2019 2018. In February 2016, 2016 02, Leases (Topic 842 one 12 not may January 1, 2019, 2016 02 $ 3.8 $ 1.1 15 In March 2017, 2017 08, Receivables – Nonrefundable Fees and Other Costs (Subtopic 310 20 not not In February 2018, 2018 02, Income Statement – Reporting Comprehensive Income (Topic 220 January 1, 2018, $187,000 In June 2018, 2018 07, Compensation – Stock Compensation (Topic 718 718 not Recently Issued Accounting Pronouncements - In June 2016, 2016 13, Financial Instruments – Credit Losses: Measurement of Credit Losses on Financial Instruments (“CECL”) 2016 13 December 15, 2019, December 15, 2018. first November 2019, 2019 10, Financial Instruments ‒ Credit Losses (Topic 326 815 Leases (Topic 842 2016 13 December 15, 2022, In January 2017, 2017 04, Simplifying the Test for Goodwill Impairment 2 2, not December 15, 2019. not December 15, 2020. not December 15, 2021. November 2019, 2019 10, Financial Instruments ‒ Credit Losses (Topic 326 Derivatives and Hedging (Topic 815 Leases (Topic 842 350, Intangibles – Goodwill and Other December 15, 2022, not In August 2018, 2018 13, Fair Value Measurement (Topic 820 December 15, 2019. In November 2019, 2019 11, Codification Improvements to Topic 326, 326, 2019 10. In December 2019, 2019 12, Income Taxes (Topic 740 not not December 15, 2020. December 15, 2021, December 15, 2022.

Note 2 - Revenue Recognition

Note 2 - Revenue Recognition	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Revenue from Contract with Customer [Text Block]	2. REVENUE RECOGNITION In accordance with ASC Topic 606, not 606. 92.2% The main types of noninterest income within the scope of the standard are as follows: Service charges on deposit accounts Gains (losses) on sale of other real estate owned (“OREO” ) not The following table depicts the disaggregation of revenue derived from contracts with customers to depict the nature, amount, timing, and uncertainty of revenue and cash flows for the years ended December 31, Noninterest Income 2019 2018 (Dollar amounts in thousands) Service charges on deposit accounts: Overdraft fees $ 841 $ 798 ATM banking fees 932 867 Service charges and other fees 413 249 Investment securities gains on sale, net (a) 194 - Gain (loss) on equity securities (a) 94 (9 ) Earnings on bank-owned life insurance (a) 431 428 Gain on sale of loans (a) 433 231 Revenue from investment services 528 385 Other income 975 779 Total noninterest income $ 4,841 $ 3,728 Net gain (loss) on other real estate owned $ (123 ) $ (55 ) (a) Not 606

Note 3 - Earnings Per Share

Note 3 - Earnings Per Share	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Earnings Per Share [Text Block]	3. EARNINGS PER SHARE There are no December 31: 2019 2018 Weighted-average common shares issued 7,286,554 7,232,238 Average treasury stock shares (816,146 ) (772,330 ) Weighted-average common shares and common stock equivalents used to calculate basic earnings per share 6,470,408 6,459,908 Additional common stock equivalents (stock options and restricted stock) used to calculate diluted earnings per share 32,398 27,906 Weighted-average common shares and common stock equivalents used to calculate diluted earnings per share 6,502,806 6,487,814 Options to purchase 14,500 $8.78 December 31, 2019. 61,040 None Options to purchase 14,900 $8.78 December 31, 2018. 42,350 None When shares recognized as equity are repurchased, the amount of the consideration paid, which includes directly attributable costs, is recognized as a deduction from equity. Repurchased shares are classified as treasury shares and are presented in the treasury share reserve. The reserve for the Company’s treasury shares comprises the cost of the Company’s shares held by the Company. As of December 31, 2019, 871,162 98,832 twelve December 31, 2019, 772,330 December 31, 2018.

Note 4 - Investment and Equity

Note 4 - Investment and Equity Securities	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]	4. INVESTME NT AND EQUITY SECURITIES The amortized cost, gross gains and losses and fair values of securities available for sale are as follows: December 31, 2019 Gross Gross Amortized Unrealized Unrealized Fair (Dollar amounts in thousands) Cost Gains Losses Value Subordinated debt $ 4,000 $ 126 $ - $ 4,126 Obligations of states and political subdivisions: Taxable 500 1 - 501 Tax-exempt 80,436 2,065 (25 ) 82,476 Mortgage-backed securities in government-sponsored entities 18,465 274 (109 ) 18,630 Total $ 103,401 $ 2,466 $ (134 ) $ 105,733 December 31, 2018 Gross Gross Amortized Unrealized Unrealized Fair (Dollar amounts in thousands) Cost Gains Losses Value U.S. government agency securities $ 7,442 $ 90 $ (61 ) $ 7,471 Obligations of states and political subdivisions: Taxable 502 10 - 512 Tax-exempt 72,387 667 (473 ) 72,581 Mortgage-backed securities in government-sponsored entities 18,185 88 (515 ) 17,758 Total $ 98,516 $ 855 $ (1,049 ) $ 98,322 On January 1, 2018, $625,000 2016 01. $710,000 $616,000 December 31, 2019 2018, $94,000 $9,000 December 31, 2019 2018, No The amortized cost and fair value of debt securities at December 31, 2019, may Amortized Fair (Dollar amounts in thousands) Cost Value Due in one year or less $ 148 $ 149 Due after one year through five years 1,324 1,345 Due after five years through ten years 16,613 16,908 Due after ten years 85,316 87,331 Total $ 103,401 $ 105,733 Investment securities with an approximate carrying value of $55.6 $63.5 December 31, 2019 2018, There were no December 31, 2018. December 31, 2019, 2019 2018 Proceeds from sales $ 12,324 $ - Gross realized gains 227 - Gross realized losses (33 ) - The tax expense related to the net realized gains above was $41,000, $0 December 31, 2019 2018, The following tables show the Company’s gross unrealized losses and fair value, aggregated by investment category and length of time that the individual securities have been in a continuous unrealized loss position. December 31, 2019 Less than Twelve Months Twelve Months or Greater Total Gross Gross Gross Fair Unrealized Fair Unrealized Fair Unrealized (Dollar amounts in thousands) Value Losses Value Losses Value Losses Obligations of states and political subdivisions Tax-exempt $ 4,324 $ (25 ) $ - $ - $ 4,324 $ (25 ) Mortgage-backed securities in government-sponsored entities 1,409 (2 ) 8,223 (107 ) 9,632 (109 ) Total $ 5,733 $ (27 ) $ 8,223 $ (107 ) $ 13,956 $ (134 ) December 31, 2018 Less than Twelve Months Twelve Months or Greater Total Gross Gross Gross Fair Unrealized Fair Unrealized Fair Unrealized (Dollar amounts in thousands) Value Losses Value Losses Value Losses U.S. government agency securities $ - $ - $ 4,105 $ (61 ) $ 4,105 $ (61 ) Obligations of states and political subdivisions Tax-exempt 20,451 (286 ) 11,053 (187 ) 31,504 (473 ) Mortgage-backed securities in government-sponsored entities 2,068 (9 ) 12,257 (506 ) 14,325 (515 ) Total $ 22,519 $ (295 ) $ 27,415 $ (754 ) $ 49,934 $ (1,049 ) There were 17 December 31, 2019. On a quarterly basis, the Company performs an assessment to determine whether there have been any events or economic circumstances indicating that a security with an unrealized loss has suffered other-than-temporary impairment (“OTTI”). A debt security is considered impaired if the fair value is less than its amortized cost basis at the reporting date. The accounting literature requires the Company to assess whether the unrealized loss is other than temporary. For equity securities where the fair value has been significantly below cost for one not The Company has asserted that at December 31, 2019 2018, not not may not not Debt securities issued by U.S. government agencies, U.S. government-sponsored enterprises, and state and political subdivisions accounted for 96.1% December 31, 2019, no ● The length of time and the extent to which the fair value has been less than the amortized cost basis. ● Changes in the near term prospects of the underlying collateral of a security such as changes in default rates, loss severity given default and significant changes in prepayment assumptions. ● The level of cash flows generated from the underlying collateral supporting the principal and interest payments of the debt securities. ● Any adverse change to the credit conditions and liquidity of the issuer, taking into consideration the latest information available about the overall financial condition of the issuer, credit ratings, recent legislation, and government actions affecting the issuer’s industry and actions taken by the issuer to deal with the present economic climate.

Note 5 - Loans and Related Allo

Note 5 - Loans and Related Allowance for Loan and Lease Losses	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]	5. LOANS AND RELATED ALL OWANCE FOR LOAN AND LEASE LOSSES The Company’s primary business activity is with loan customers located within its local Northeastern Ohio trade area, eastern Geauga County, and contiguous counties to the north, east, and south. The Company also serves the central Ohio market with offices in Dublin, Sunbury, Powell, Plain City and Westerville, Ohio. The Northeastern Ohio trade area includes locations in Beachwood, Twinsburg, and Solon, Ohio. Commercial, residential, consumer, and agricultural loans are granted. Although the Company has a diversified loan portfolio at December 31, 2019 2018, The following tables summarize the primary segments of the loan portfolio and the allowance for loan and lease losses (in thousands): Real Estate-Mortgage December 31, 2019 Commercial and industrial Real estate- construction Residential Commercial Consumer installment Total Loans: Individually evaluated for impairment $ 882 $ - $ 1,628 $ 10,559 $ 1 $ 13,070 Collectively evaluated for impairment 88,645 63,246 345,419 459,468 14,410 971,188 Total loans $ 89,527 $ 63,246 $ 347,047 $ 470,027 $ 14,411 $ 984,258 Real estate-Mortgage December 31, 2018 Commercial and industrial Real estate- construction Residential Commercial Consumer installment Total Loans: Individually evaluated for impairment $ 2,570 $ - $ 1,970 $ 9,533 $ 2 $ 14,075 Collectively evaluated for impairment 81,287 56,731 334,517 488,714 16,785 978,034 Total loans $ 83,857 $ 56,731 $ 336,487 $ 498,247 $ 16,787 $ 992,109 The amounts above include net deferred loan origination costs of $1.3 $1.6 December 31, 2019 December 31, 2018, Real Estate-Mortgage December 31, 2019 Commercial and industrial Real estate- construction Residential Commercial Consumer installment Total Allowance for loan and lease losses: Ending allowance balance attributable to loans: Individually evaluated for impairment $ 3 $ - $ 30 $ 627 $ - $ 660 Collectively evaluated for impairment 453 97 1,628 3,902 28 6,108 Total ending allowance balance $ 456 $ 97 $ 1,658 $ 4,529 $ 28 $ 6,768 Real Estate-Mortgage December 31, 2018 Commercial and industrial Real estate- construction Residential Commercial Consumer installment Total Allowance for loan and lease losses: Ending allowance balance attributable to loans: Individually evaluated for impairment $ 667 $ - $ 43 $ 643 $ 1 $ 1,354 Collectively evaluated for impairment 302 100 1,538 4,008 126 6,074 Total ending allowance balance $ 969 $ 100 $ 1,581 $ 4,651 $ 127 $ 7,428 The Company’s loan portfolio is segmented to a level that allows management to monitor risk and performance. The portfolio is segmented into Commercial and Industrial (“C&I”), Real Estate Construction, Real Estate - Mortgage which is further segmented into Residential and Commercial real estate, and Consumer Installment Loans. The C&I loan segment consists of loans made for the purpose of financing the activities of commercial customers. The residential mortgage loan segment consists of loans made for the purpose of financing the activities of residential homeowners. The commercial mortgage loan segment consists of loans made for the purpose of financing the activities of commercial real estate owners and operators. The consumer loan segment consists primarily of installment loans and overdraft lines of credit connected with customer deposit accounts. Management evaluates individual loans in all of the commercial segments for possible impairment based on guidance established by the Board of Directors. Loans are considered to be impaired when, based on current information and events, it is probable that the Company will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Factors considered by management in evaluating impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. 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. The Company does not Once the determination has been made that a loan is impaired, the determination of whether a specific allocation of the allowance is necessary is measured by comparing the recorded investment in the loan to the fair value of the loan using one three not The following tables present impaired loans by class, segregated by those for which a specific allowance was required and those for which a specific allowance was not December 31, 2019 Impaired Loans Recorded Unpaid Principal Related Investment Balance Allowance With no related allowance recorded: Commercial and industrial $ 747 $ 1,524 $ - Real estate - mortgage: Residential 979 1,057 - Commercial 5,617 5,617 - Consumer installment 1 1 - Total $ 7,344 $ 8,199 $ - With an allowance recorded: Commercial and industrial $ 135 $ 135 $ 3 Real estate - mortgage: Residential 649 700 30 Commercial 4,942 4,952 627 Total $ 5,726 $ 5,787 $ 660 Total: Commercial and industrial $ 882 $ 1,659 $ 3 Real estate - mortgage: Residential 1,628 1,757 30 Commercial 10,559 10,569 627 Consumer installment 1 1 - Total $ 13,070 $ 13,986 $ 660 December 31, 2018 Impaired Loans Recorded Unpaid Principal Related Investment Balance Allowance With no related allowance recorded: Commercial and industrial $ 207 $ 413 $ - Real estate - mortgage: Residential 1,306 1,462 - Commercial 1,867 2,186 - Total $ 3,380 $ 4,061 $ - With an allowance recorded: Commercial and industrial $ 2,363 $ 3,013 $ 667 Real estate - mortgage: Residential 664 715 43 Commercial 7,666 7,676 643 Consumer installment 2 2 1 Total $ 10,695 $ 11,406 $ 1,354 Total: Commercial and industrial $ 2,570 $ 3,426 $ 667 Real estate - mortgage: Residential 1,970 2,177 43 Commercial 9,533 9,862 643 Consumer installment 2 2 1 Total $ 14,075 $ 15,467 $ 1,354 The tables above include troubled debt restructuring totaling $3.6 $4.4 December 31, 2019 2018, The following table presents interest income by class, recognized on impaired loans (in thousands): As of December 31, 2019 As of December 31, 2018 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized Commercial and industrial $ 1,770 $ 141 $ 4,210 $ 172 Real estate - construction 648 - 9 - Real estate - mortgage: Residential 1,803 51 2,531 57 Commercial 10,366 375 6,805 377 Consumer installment 2 - 3 - Total $ 14,589 $ 567 $ 13,558 $ 606 Troubled Debt Restructuring (TDR) describes loans on which the bank has granted concessions for reasons related to the customer’s financial difficulties. Such concessions may one ● reduction in the interest rate to below market rates ● extension of repayment requirements beyond normal terms ● reduction of the principal amount owed ● reduction of accrued interest due ● acceptance of other assets in full or partial payment of a debt In each case the concession is made due to deterioration in the borrower’s financial condition, and the new terms are less stringent than those required on a new loan with similar risk. The total impact on the ALLL for 2019 2018 $33,000 $459,000, The following tables present the number of loan modifications by class, the corresponding recorded investment, and the subsequently defaulted modifications (in thousands) for the years ended: December 31, 2019 Number of Contracts Pre-Modification Post-Modification Troubled Debt Restructurings Term Modification Other Total Outstanding Recorded Investment Outstanding Recorded Investment Commercial and industrial 3 - 3 $ 488 $ 490 Residential real estate 4 2 6 294 354 $ 782 $ 844 December 31, 2018 Number of Contracts Pre-Modification Post-Modification Troubled Debt Restructurings Term Modification Other Total Outstanding Recorded Investment Outstanding Recorded Investment Commercial and industrial 1 - 1 $ 44 $ 44 Residential real estate 3 2 5 286 286 Commercial real estate 1 - 1 94 94 $ 424 $ 424 December 31, 2018 Troubled Debt Restructurings Number of Recorded subsequently defaulted Contracts Investment Residential real estate 1 $ 19 One loan with a book balance of $36,000 2019 December 31, 2019. no December 31, 2019. Management uses a nine first five not not not 90 To help ensure that risk ratings are accurate and reflect the present and future capacity of borrowers to repay a loan as agreed, the Company has a structured loan-rating process with several layers of internal and external oversight. Generally, consumer and residential mortgage loans are included in the Pass categories unless a specific action, such as bankruptcy, repossession, or death, occurs to raise awareness of a possible credit event. The Company’s Commercial Loan Officers are responsible for the timely and accurate risk rating of the loans in their portfolios at origination and on an ongoing basis. The Credit Department performs an annual review of all commercial relationships with loan balances of $500,000 $250,000 $125,000. The following tables present the classes of the loan portfolio summarized by the aggregate Pass rating and the criticized categories of Special Mention, Substandard, and Doubtful within the internal risk rating system (in thousands): Special Total December 31, 2019 Pass Mention Substandard Doubtful Loans Commercial and industrial $ 84,136 $ 3,619 $ 1,772 $ - $ 89,527 Real estate - construction 63,246 - - - 63,246 Real estate - mortgage: Residential 342,988 420 3,639 - 347,047 Commercial 453,170 6,989 9,868 - 470,027 Consumer installment 14,399 - 12 - 14,411 Total $ 957,939 $ 11,028 $ 15,291 $ - $ 984,258 Special Total December 31, 2018 Pass Mention Substandard Doubtful Loans Commercial and industrial $ 77,002 $ 4,572 $ 2,283 $ - $ 83,857 Real estate - construction 55,397 1,334 - - 56,731 Real estate - mortgage: Residential 332,475 553 3,459 - 336,487 Commercial 483,516 6,617 8,114 - 498,247 Consumer installment 16,776 - 11 - 16,787 Total $ 965,166 $ 13,076 $ 13,867 $ - $ 992,109 Management further monitors the performance and credit quality of the loan portfolio by analyzing the age of the portfolio as determined by the length of time a recorded payment is past due. The following tables present the classes of the loan portfolio summarized by the aging categories of loans and nonaccrual loans (in thousands): 30-59 Days 60-89 Days 90 Days+ Total Total December 31, 2019 Current Past Due Past Due Past Due Past Due Loans Commercial and industrial $ 88,965 $ 190 $ 66 $ 306 $ 562 89,527 Real estate - construction 63,246 - - - - 63,246 Real estate - mortgage: Residential 344,311 1,713 63 960 2,736 347,047 Commercial 465,666 63 - 4,298 4,361 470,027 Consumer installment 13,378 623 216 194 1,033 14,411 Total $ 975,566 $ 2,589 $ 345 $ 5,758 $ 8,692 $ 984,258 30-59 Days 60-89 Days 90 Days+ Total Total December 31, 2018 Current Past Due Past Due Past Due Past Due Loans Commercial and industrial $ 82,770 $ 288 $ 213 $ 586 $ 1,087 83,857 Real estate - construction 56,731 - - - - 56,731 Real estate - mortgage: Residential 331,379 2,612 1,083 1,413 5,108 336,487 Commercial 496,597 664 - 986 1,650 498,247 Consumer installment 16,768 19 - - 19 16,787 Total $ 984,245 $ 3,583 $ 1,296 $ 2,985 $ 7,864 992,109 The following tables present the classes of the loan portfolio summarized by nonaccrual loans and loans 90 December 31, 2019 Nonaccrual 90+ Days Past Due and Accruing Commercial and industrial $ 946 $ - Real estate - mortgage: Residential 3,285 - Commercial 4,451 - Consumer installment 197 - Total $ 8,879 $ - December 31, 2018 Nonaccrual 90+ Days Past Due and Accruing Commercial and industrial $ 996 $ 91 Real estate - mortgage: Residential 2,731 754 Commercial 2,864 100 Consumer installment 4 - Total $ 6,595 $ 945 Interest income that would have been recorded had these loans not $342,000 2019 $456,000 2018. An allowance for loan and lease losses (“ALLL”) is maintained to absorb losses from the loan portfolio. The ALLL is based on management’s continuing evaluation of the risk characteristics and credit quality of the loan portfolio, assessment of current economic conditions, diversification and size of the portfolio, adequacy of collateral, past and anticipated loss experience, and the amount of nonperforming loans. The Company’s methodology for determining the ALLL is based on the requirements of ASC Section 310 10 35 450 20 two may Loans that are collectively evaluated for impairment are analyzed, with general allowances being made as appropriate. For general allowances, historical loss trends are used in the estimation of losses in the current portfolio. These historical loss amounts are modified by other qualitative factors. The classes described above, which are based on the purpose code assigned to each loan, provide the starting point for the ALLL analysis. Management tracks the historical net charge-off activity at the purpose code level. A historical charge-off factor is calculated utilizing the last twelve Management has identified a number of additional qualitative factors which it uses to supplement the historical charge-off factor, because these factors are likely to cause estimated credit losses associated with the existing loan pools to differ from historical loss experience. The additional factors that are evaluated quarterly and updated using information obtained from internal, regulatory, and governmental sources are: national and local economic trends and conditions; levels of and trends in delinquency rates and nonaccrual loans; trends in volumes and terms of loans; effects of changes in lending policies; experience, ability, and depth of lending staff; value of underlying collateral; and concentrations of credit from a loan type, industry, and/or geographic standpoint. Management reviews the loan portfolio on a quarterly basis using a defined, consistently applied process in order to make appropriate and timely adjustments to the ALLL. When information confirms all or part of specific loans to be uncollectible, these amounts are promptly charged off against the ALLL. The following tables summarize the primary segments of the loan portfolio (in thousands): Commercial and industrial Real estate- construction Real estate- residential mortgage Real estate- commercial mortgage Consumer installment Total ALLL balance at December 31, 2018 $ 969 $ 100 $ 1,581 $ 4,651 $ 127 $ 7,428 Charge-offs (519 ) - (523 ) (32 ) (735 ) (1,809 ) Recoveries 82 74 78 17 8 259 Provision (76 ) (77 ) 522 (107 ) 628 890 ALLL balance at December 31, 2019 $ 456 $ 97 $ 1,658 $ 4,529 $ 28 $ 6,768 Commercial and industrial Real estate- construction Real estate- residential mortgage Real estate- commercial mortgage Consumer installment Total ALLL balance at December 31, 2017 $ 999 $ 313 $ 1,760 $ 4,036 $ 82 $ 7,190 Charge-offs (610 ) - (177 ) (111 ) (220 ) (1,118 ) Recoveries 287 63 128 - 38 516 Provision 293 (276 ) (130 ) 726 227 840 ALLL balance at December 31, 2018 $ 969 $ 100 $ 1,581 $ 4,651 $ 127 $ 7,428 The provision fluctions during the the year ended December 31, 2019 ● commercial and industrial loans are due to the charge-offs of two $438,000, 2018. ● residential portfolio are due to the charge-off of two $360,000 ● commercial real estate loans are due to a small charge-off and a declining portfolio balance. ● consumer installments are due to charge-offs in the student loan portfolio totaling $566,000. The provision fluctions during the the year ended December 31, 2018 ● real estate construction loans are due to the historical loss rate for the real estate construction pool changing to - 0.127% 0.775% first 2018 no ● residential real estate are due to a continued decline in historical losses and consistent decreases in the ratio of nonperforming loans to toal loans in this segment over the past few years resulting in a decrease in the reserves required. ● consumer installment loans are primarily due to increases in historical losses for this segment over the prior year.

Note 6 - Premises and Equipment

Note 6 - Premises and Equipment	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Property, Plant and Equipment Disclosure [Text Block]	6. PREMISES AND EQUIPMENT Major classifications of premises and equipment at December 31: (Dollar amounts in thousands) 2019 2018 Land and land improvements $ 2,920 $ 2,920 Building and leasehold improvements 15,836 15,377 Furniture, fixtures, and equipment 9,357 8,011 Financing right-of-use assets 4,012 - Total premises and equipment 32,125 26,308 Less accumulated depreciation and amortization 14,251 13,305 Total premises and equipment, net $ 17,874 $ 13,003 Depreciation expense charged to operations was $1.0 2019 $951,000 2018.

Note 7 - Goodwill and Intangibl

Note 7 - Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Goodwill and Intangible Assets Disclosure [Text Block]	7. GOODWILL AND INTANGIBLE ASSETS Goodwill totaled $ 15.1 December 31, 2019, 2018. $2.1 $2.4 December 31, 2019, 2018, $1.4 $1.0 December 31, 2019, 2018. $341,000 $352,000 2019 2018, Core deposit intangible assets are amortized to their estimated residual values over their expected useful lives, commonly of ten December 31, 2019 2020 $ 332 2021 321 2022 309 2023 296 2024 281 Thereafter 517 Total $ 2,056

Note 8 - Accrued Interest Recei

Note 8 - Accrued Interest Receivable and Other Assets	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Other Assets Disclosure [Text Block]	8. ACCRUED INTEREST RECEIVABLE AND OTHER ASSETS The components of accrued interest receivable and other assets at the years ended December 31: (Dollar amounts in thousands) 2019 2018 Restricted stock $ 3,848 $ 3,679 Accrued interest receivable on investment securities 753 794 Accrued interest receivable on loans 2,718 2,839 Deferred tax asset, net 374 1,232 Other real estate owned 155 270 Operating right-of-use assets 903 - Other 1,946 884 Total $ 10,697 $ 9,698

Note 9 - Deposits

Note 9 - Deposits	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Deposit Liabilities Disclosures [Text Block]	9. DEPOSITS Time deposits that meet or exceed the FDIC Insurance limit of $250,000 December 31, 2019 2018, $126.6 $75.8 Scheduled maturities of time deposits as of December 31, 2019 (Dollar amounts in thousands) 2020 $ 251,291 2021 62,523 2022 25,195 2023 16,868 2024 12,923 Total $ 368,800

Note 10 - Short-term Borrowings

Note 10 - Short-term Borrowings	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Short-term Debt [Text Block]	10. SHORT-TERM BORROWINGS For the year ended December 31, (Dollar amounts in thousands) 2019 2018 2017 Balance at year-end $ 5,075 $ 90,398 $ 74,707 Average balance outstanding 14,808 42,231 63,910 Maximum month-end balance 92,000 101,857 114,025 Weighted-average rate at year-end 1.66 % 2.53 % 1.36 % Weighted-average rate during the year 2.49 % 1.99 % 1.18 % Average balances outstanding during the year represent daily average balances, and average interest rates represent interest expense divided by the related average balance. The Company maintains a $6.0 5.00%, $10.0 4.93%, $4.0 5.51%. December 31, 2019, 2018, no $87.0 $27.0 December 31, 2019 2018,

Note 11 - Other Borrowings

Note 11 - Other Borrowings	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Other Borrowings [Text Block]	11. OTHER BORROWINGS Other borrowings consist of advances from the FHLB and subordinated debt as follows: Weighted- Stated interest (Dollar amounts in thousands) Maturity range average rate range Description from to interest rate from to 2019 2018 Fixed-rate amortizing 07/01/25 10/01/28 4.06 % 4.02 % 4.47 % $ 404 $ 555 Finance lease liabilities 12/31/21 06/01/40 3.29 % 2.70 % 3.51 % 4,098 - Junior subordinated debt 12/21/37 12/21/37 4.10 % 3.61 % 4.42 % 8,248 8,248 Total $ 12,750 $ 8,803 The scheduled maturities of other borrowings are as follows: (Dollar amounts in thousands) Weighted- Year Ending December 31, Amount Average Rate 2020 $ 445 3.36 % 2021 442 3.36 % 2022 434 3.36 % 2023 433 3.36 % 2024 430 3.36 % Beyond 2024 10,566 3.87 % Total $ 12,750 3.84 % Fixed-rate amortizing advances from the FHLB require monthly principal and interest payments and an annual 20 20 first $273.4 December 31, 2019. December 31, 2019, $10.0 January 23, 2020. December 31, 2019, no The Company formed a special purpose entity (“Entity”) to issue $8.0 $248,000 1.67%. may December 2006 $8.3 December 2037, On January 1, 2019, 2016 02 $3.8 15

Note 12 - Accrued Interest Paya

Note 12 - Accrued Interest Payable and Other Liabilities	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Other Liabilities Disclosure [Text Block]	12. ACCRUED INTEREST PAYABLE AND OTHER LIABILITIES The components of accrued interest payable and other liabilities are as follows at December 31: 2019 2018 (Dollar amounts in thousands) Accrued interest payable $ 917 $ 744 Accrued directors' benefits 1,470 1,346 Accrued salary and benefits expense 1,451 1,058 Operating lease liabilities 906 - Other 1,288 1,692 Total $ 6,032 $ 4,840

Note 13 - Income Taxes

Note 13 - Income Taxes	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Income Tax Disclosure [Text Block]	13. INCOME TAXES The provision for federal income taxes for the years ended December 31, (Dollar amounts in thousands) 2019 2018 Current payable $ 2,265 $ 2,403 Deferred 327 (241 ) Total provision $ 2,592 $ 2,162 The tax effects of deductible and taxable temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities are as follows at December 31: (Dollar amounts in thousands) 2019 2018 Deferred tax assets: Allowance for loan and lease losses $ 1,288 $ 1,327 Supplemental retirement plan 469 454 Investment security basis adjustment 18 18 Nonaccrual interest income 297 389 Accrued compensation 244 222 Deferred origination fees, net 30 - Net unrealized loss on AFS securities - 41 Lease liability 1,051 - Gross deferred tax assets 3,397 2,451 Deferred tax liabilities: Premises and equipment 583 328 Net unrealized gain on AFS securities 490 - Net unrealized gain on equity securities 62 1 FHLB stock dividends 139 139 Intangibles 378 342 Mortgage servicing rights 82 75 Deferred origination fees, net - 13 Acquisition fair value adjustments 253 275 Right of use assets 1,032 - Other 4 5 Gross deferred tax liabilities 3,023 1,178 Net deferred tax assets $ 374 $ 1,273 No December 31, 2019 2018, The reconciliation between the federal statutory rate and the Company’s effective consolidated income tax rate for the years ended December 31, (Dollar amounts in thousands) 2019 2018 % of % of Pretax Pretax Amount Income Amount Income Provision at statutory rate $ 3,214 21.0 % $ 3,065 21.0 % Tax-exempt income (647 ) (4.2 )% (622 ) (4.3 )% Nondeductible interest expense 32 0.2 % 27 0.2 % Stock-based compensation - - % (37 ) (0.3 )% Other (7 ) (0.1 )% (271 ) (1.8 )% Actual tax expense and effective rate $ 2,592 16.9 % $ 2,162 14.8 % ASC 740 10 not not 50 not first no not first no At December 31, 2019 December 31, 2018, no 740 10 not 12 The Company and the Bank are subject to U.S. federal income tax as well as an income tax in the states of Ohio and Florida, and the Bank is subject to a capital-based franchise tax in the state of Ohio. The Company and the Bank are no December 31, 2016.

Note 14 - Employee Benefits

Note 14 - Employee Benefits	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Compensation and Employee Benefit Plans [Text Block]	14. EMPLOYEE BENEFITS Employee Retirement Plan The Bank maintains section 401 21 50% 6% December 31, 2019 2018. six second 20% 3 2019 2018 $319,000 $306,000, Executive Deferred Compensation Plan s The Company maintains executive deferred compensation plans to provide post-retirement payments to members of senior management. The plan agreements are noncontributory, defined contribution arrangements that provide supplemental retirement income benefits to several officers, with contributions made solely by the Bank. Accrued executive deferred compensation amounted to $615,000 $504,000 December 31, 2019 2018, 2019 2018, $85,000 $98,000, Stock Option and Restricted Stock Plan In 2007, 2007 “2007 320,000 2007 ten 2007 2017, 14,500 2007 not In 2017, 2017 “2017 2017 May 10, 2017. 448,000 2017 ten not 386,188 December 31, 2019. The following table presents share data related to the outstanding options: Shares Weighted- average Exercise Price Per Share Outstanding, January 1, 2019 14,900 $ 8.78 Exercised (400 ) 8.78 Outstanding, December 31, 2019 14,500 $ 8.78 Exercisable, December 31, 2019 14,500 $ 8.78 The total intrinsic value of outstanding in-the-money exercisable stock options was $251,068 $185,356 December 31, 2019 2018, No December 31, 2019 2018. For the years ended December 31, 2019 2018, $265,000 $215,000, December 31, 2019, no For the years ended December 31, 2019 2018, 400 24,600 $0 $85,000, During 2019 2018, 29,130 22,702 $184,000 $191,000 2019 2018, third three 10.00% 2019 8.00% 2018. The Company recognized restricted stock forfeitures in the period they occur. The following table presents the activity during 2019 Units Weighted- average Grant Date Fair Value Per Unit Nonvested at January 1, 2019 42,350 $ 20.98 Granted 29,130 20.95 Vested (10,440 ) 16.56 Nonvested at December 31, 2019 61,040 $ 21.72 Expected to vest at December 31, 2019 41,136 $ 20.57 As of December 31, 2019, $715,000 1.83 December 31, 2019 2018 $265,000, $205,000,

Note 15 - Commitments

Note 15 - Commitments	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Lease Disclosure [Text Block]	15. C OMMITMENTS In the normal course of business, there are various outstanding commitments and certain contingent liabilities which are not December 31: (Dollar amounts in thousands) 2019 2018 Commitments to extend credit $ 260,579 $ 228,427 Standby letters of credit 1,616 1,656 Total $ 262,195 $ 230,083 These instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the Consolidated Balance Sheet. The Company’s exposure to credit loss, in the event of nonperformance by the other parties to the financial instruments, is represented by the contractual amounts as disclosed. The Company minimizes its exposure to credit loss under these commitments by subjecting them to credit approval and review procedures and collateral requirements as deemed necessary. Commitments generally have fixed expiration dates within one Standby letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third one Leasing Commitments The Company leases seven one December 31, 2019, $4.9 1 20 December 31, 2019, $4.0 $903,000. December 31, 2019, $4.1 $906,000. On April 17, 2019, December 31, 2019. 2020, not 12 not December 31, 2019. Lease costs incurred are as follows: For the Twelve Months Ended December 31, 2019 Lease Costs: Finance lease cost: Amortization of right-of-use asset $ 360 Interest Expense 132 Other 57 Operating lease cost 245 Total lease cost $ 794 The following table displays the weighted-average term and discount rates for both operating and finance leases outstanding as of December 31, 2019: Operating Finance Weighted-average term (years) 6.5 13.7 Weighted-average discount rate 2.9 % 3.3 % The following table displays the undiscounted cash flows due related to operating and finance leases as of December 31, 2019, December 31, 2019 Operating Finance Undiscounted cash flows due within: 2020 $ 185 $ 458 2021 169 476 2022 169 478 2023 169 478 2024 133 478 2025 and thereafter 174 2,749 Total undiscounted cash flows 999 5,117 Impact of present value discount (93 ) (1,019 ) Amount reported on balance sheet $ 906 $ 4,098

Note 16 - Regulatory Restrictio

Note 16 - Regulatory Restrictions	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Banking and Thrift Disclosure [Text Block]	16. REGULATORY RESTRICTIONS The Company is subject to the regulatory requirements of the Federal Reserve System as a bank holding company. The bank is subject to regulations of the Federal Deposit Insurance Corporation (“FDIC”) and the State of Ohio, Division of Financial Institutions. Cash Requirements The Federal Reserve Bank of Cleveland requires the Company to maintain certain average reserve balances. As of December 31, 2019 2018, $16.5 $17.3 Loans Federal law prevents the Company from borrowing from the Bank unless the loans are secured by specific obligations. Further, such secured loans are limited in amount of 10% Dividends MBC is subject to dividend restrictions that generally limit the amount of dividends that can be paid by an Ohio state-chartered bank. Under the Ohio Banking Code, cash dividends may not two 2019 $20.5 2020

Note 17 - Regulatory Capital

Note 17 - Regulatory Capital	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Regulatory Capital Requirements under Banking Regulations [Text Block]	17. REGULATORY CAPITAL The Bank and Company are subject to regulatory capital requirements administered by banking agencies. Capital adequacy guidelines and 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 about components, risk weightings, and other factors and the regulators can lower classifications in certain cases. Failure to meet various capital requirements can initiate regulatory action that could have a direct material effect on the financial statements. As of December 31, 2019, The prompt corrective action regulations provide five not may The capital conservation buffer is designed to absorb losses during periods of economic stress. Banking institutions with a ratio of Common Equity Tier 1 The following tables present actual and required capital ratios as of December 31, 2019 2018, As of December 31, 2019 Leverage Tier 1 Risk Based Common Equity Tier 1 Total Risk Based The Middlefield Banking Company 10.35 % 12.12 % 12.12 % 12.79 % Middlefield Banc Corp. 10.23 % 12.56 % 11.77 % 13.23 % Adequately capitalized ratio 4.00 % 6.00 % 4.50 % 8.00 % Adequately capitalized ratio plus fully phased-in capital conservation buffer 4.00 % 8.50 % 7.00 % 10.50 % Well-capitalized ratio (Bank only) 5.00 % 8.00 % 6.50 % 10.00 % As of December 31, 2018 Leverage Tier 1 Risk Based Common Equity Tier 1 Total Risk Based The Middlefield Banking Company 9.60 % 11.09 % 11.09 % 11.83 % Middlefield Banc Corp. 10.35 % 11.83 % 11.04 % 12.57 % Adequately capitalized ratio 4.00 % 6.00 % 4.50 % 8.00 % Adequately capitalized ratio plus fully phased-in capital conservation buffer 4.00 % 8.50 % 7.00 % 10.50 % Well-capitalized ratio (Bank only) 5.00 % 8.00 % 6.50 % 10.00 %

Note 18 - Fair Value Disclosure

Note 18 - Fair Value Disclosure Measurements	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Fair Value Disclosures [Text Block]	18. FAIR VALUE DISCLOSURE MEASUREMENTS The following disclosures show the hierarchal disclosure framework associated with the level of pricing observations utilized in measuring assets and liabilities at fair value. The three Level I: Quoted prices are available in active markets for identical assets or liabilities as of the reported date. Level II: Pricing inputs are other than the quoted prices in active markets, which are either directly or indirectly observable as of the reported date. The nature of these assets and liabilities includes items for which quoted prices are available but traded less frequently and items that are fair-valued using other financial instruments, the parameters of which can be directly observed. Level III: Assets and liabilities that have little to no not two This hierarchy requires the use of observable market data when available. The following tables present the assets measured on a recurring basis on the Consolidated Balance Sheet at their fair value by level within the fair value hierarchy. Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. December 31, 2019 (Dollar amounts in thousands) Level I Level II Level III Total Assets measured on a recurring basis: Subordinated debt $ - $ 4,126 $ - $ 4,126 Obligations of states and political subdivisions - 82,977 - 82,977 Mortgage-backed securities in government- sponsored entities - 18,630 - 18,630 Total debt securities - 105,733 - 105,733 Equity securities in financial institutions 710 - - 710 Total $ 710 $ 105,733 $ - $ 106,443 December 31, 2018 (Dollar amounts in thousands) Level I Level II Level III Total Assets measured on a recurring basis: U.S. government agency securities $ - $ 7,471 $ - $ 7,471 Obligations of states and political subdivisions - 73,093 - 73,093 Mortgage-backed securities in government- sponsored entities - 17,758 - 17,758 Total debt securities - 98,322 - 98,322 Equity securities in financial institutions 616 - - 616 Total $ 616 $ 98,322 $ - $ 98,938 Investment Securities Available for Sale Equity Securities no not The following tables present the assets measured on a non-recurring basis on the Consolidated Balance Sheet at their fair value by level within the fair value hierarchy. Collateral-dependent impaired loans are carried at fair value if they have been charged down to fair value or if a specific valuation allowance has been established. A new cost basis is established at the time a property is initially recorded in OREO. OREO properties are carried at fair value if a devaluation has been taken to the property’s value subsequent to the initial measurement. No December 31, 2019. December 31, 2019 (Dollar amounts in thousands) Level I Level II Level III Total Assets measured on a non-recurring basis: Impaired loans $ - $ - $ 5,166 $ 5,166 December 31, 2018 (Dollar amounts in thousands) Level I Level II Level III Total Assets measured on a non-recurring basis: Impaired loans $ - $ - $ 1,075 $ 1,075 Impaired Loans third may not not $2.1 $492,000 December 31, 2019 2018, The following tables present additional quantitative information about assets measured at fair value on a non-recurring basis and for which the Company uses Level III inputs to determine fair value: Quantitative Information about Level III Fair Value Measurements (Dollar amounts in thousands) Fair Value Estimate Valuation Techniques Unobservable Input Range (Weighted Average) December 31, 2019 Impaired loans $ 5,166 Appraisal of collateral (1) Appraisal adjustments (2) 40.3% to 47.4% (41.8%) Quantitative Information about Level III Fair Value Measurements (Dollar amounts in thousands) Fair Value Estimate Valuation Techniques Unobservable Input Range (Weighted Average) December 31, 2018 Impaired loans $ 1,075 Appraisal of collateral (1) Appraisal adjustment (2) 0.0% to 100.0% (40.6%) ( 1 Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various level III inputs which are not ( 2 Appraisals may The estimated fair value of the Company’s financial instruments not December 31, 2019 Carrying Total Value Level I Level II Level III Fair Value (in thousands) Financial assets: Cash and cash equivalents $ 35,113 $ 35,113 $ - $ - $ 35,113 Loans held for sale 1,220 - 1,220 - 1,220 Net loans 977,490 - - 974,213 974,213 Bank-owned life insurance 16,511 16,511 - - 16,511 Federal Home Loan Bank stock 3,848 3,848 - - 3,848 Accrued interest receivable 3,471 3,471 - - 3,471 Financial liabilities: Deposits $ 1,020,843 $ 652,043 $ - $ 371,193 $ 1,023,236 Short-term borrowings 5,075 5,075 - - 5,075 Other borrowings 12,750 - - 12,783 12,783 Accrued interest payable 917 917 - - 917 December 31, 2018 Carrying Total Value Level I Level II Level III Fair Value (in thousands) Financial assets: Cash and cash equivalents $ 107,933 $ 107,933 $ - $ - $ 107,933 Loans held for sale 597 - 597 - 597 Net loans 984,681 - - 973,124 973,124 Bank-owned life insurance 16,080 16,080 - - 16,080 Federal Home Loan Bank stock 3,679 3,679 - - 3,679 Accrued interest receivable 3,633 3,633 - - 3,633 Financial liabilities: Deposits $ 1,016,067 $ 715,153 $ - $ 298,891 $ 1,014,044 Short-term borrowings 90,398 90,398 - - 90,398 Other borrowings 8,803 - - 8,827 8,827 Accrued interest payable 744 744 - - 744 All financial instruments included in the above tables, with the exception of net loans, deposits, and other borrowings, are carried at cost, which approximates the fair value of the instruments.

Note 19 - Accumulated Other Com

Note 19 - Accumulated Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Comprehensive Income (Loss) Note [Text Block]	19. ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) The following table presents the changes in accumulated other comprehensive income (loss) by component net of tax: Unrealized gains/(losses) on available-for-sale (Dollars in thousands) securities (a) Balance as of December 31, 2017 $ 1,091 Other comprehensive loss (1,291 ) Change in accounting principle, ASC 2016-01 (b) (141 ) Change in accounting principle, ASC 2018-02 (b) 187 Period change (1,245 ) Balance at December 31, 2018 $ (154 ) Balance as of December 31, 2018 $ (154 ) Other comprehensive income 2,149 Amount reclassified from accumulated other comprehensive income (153 ) Period change 1,996 Balance at December 31, 2019 $ 1,842 (a) All amounts are net of tax. Amounts in parentheses indicate debits to accumulated other comprehensive income. (b) Reclassifications are the result of the adoption of ASUs 2016 01 2018 02 January 1, 2018. The following table presents significant amounts reclassified out of each component of accumulated other comprehensive income for the year ended December 31, 2019: Amount Reclassified from Affected Line Item in Accumulated Other the Statement Where (Dollars in thousands) Comprehensive Income Net Income is Details about other comprehensive income December 31, 2019 Presented Unrealized gains on available-for-sale securities (a) $ 194 Investment securities gains on sale, net (41 ) Income taxes $ 153 (a) Amounts in parentheses indicate expenses and other amounts indicate income. There were no December 31, 2018.

Note 20 - Stock Split Disclosur

Note 20 - Stock Split Disclosure	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Stock Split Disclosure [Text Block]	20. STOCK SPLIT DISCLOSURE On October 9, 2019, two one October 25, 2019, one November 8, 2019. With respect to the December 31, 2019 2018 December 31, 2018 December 31, 2018 For the year ended December 31, 2018 Restated net income per common share - basic $ 1.92 Restated net income per common share - diluted $ 1.91 Restated weighted-average common shares issued 7,232,238 Restated average treasury stock shares (772,330 ) Restated average shares outstanding - basic 6,459,908 Restated stock options and restricted stock 27,906 Restated average shares outstanding - diluted 6,487,814 Restated period ending shares oustanding 6,488,664 Restated treasury shares outstanding 772,330

Note 21 - Parent Company

Note 21 - Parent Company	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Condensed Financial Information of Parent Company Only Disclosure [Text Block]	21. PARENT COMPANY Following are condensed financial statements for the Company. CONDENSED BALANCE SHEET (Dollar amounts in thousands) December 31, 2019 2018 ASSETS Cash and due from banks $ 2,577 $ 1,582 Equity securities, at fair value 710 616 Investment in nonbank subsidiary 1,400 2,364 Investment in subsidiary bank 141,104 128,366 Other assets 977 4,080 TOTAL ASSETS $ 146,768 $ 137,008 LIABILITIES Trust preferred debt $ 8,248 $ 8,248 Other liabilities 745 470 TOTAL LIABILITIES 8,993 8,718 STOCKHOLDERS' EQUITY 137,775 128,290 TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY $ 146,768 $ 137,008 CONDENSED STATEMENT OF COMPREHENSIVE INCOME Year Ended December 31, (Dollar amounts in thousands) 2019 2018 INCOME Dividends from subsidiary bank $ 4,450 $ 4,650 Dividends from nonbank subsidiary 1,000 - Gain (loss) on equity securities 94 (9 ) Other 12 9 Total income 5,556 4,650 EXPENSES Interest expense 343 325 Other 2,949 2,119 Total expenses 3,292 2,444 Income before income tax benefit 2,264 2,206 Income tax benefit (669 ) (513 ) Income before equity in undistributed net income of subsidiaries 2,933 2,719 Equity in undistributed net income of subsidiaries 9,778 9,712 NET INCOME $ 12,711 $ 12,431 Comprehensive Income $ 14,707 $ 11,140 CONDENSED STATEMENT OF CASH FLOWS Year Ended December 31, (Dollar amounts in thousands) 2019 2018 OPERATING ACTIVITIES Net income $ 12,711 $ 12,431 Adjustments to reconcile net income to net cash provided by operating activities: Equity in undistributed net income of Middlefield Banking Company (10,742 ) (9,711 ) Equity in undistributed net loss of EMORECO 964 (1 ) Stock-based compensation 548 371 (Gain) loss on equity securities (94 ) 9 Other, net 3,095 (382 ) Net cash provided by operating activities 6,482 2,717 FINANCING ACTIVITIES Proceeds from issuance of common stock 95 92 Restricted stock cash portion (44 ) - Stock options exercised 4 168 Proceeds from dividend reinvestment plan 372 618 Repurchase of treasury shares (2,229 ) - Cash dividends (3,685 ) (3,779 ) Net cash (used in) financing activities (5,487 ) (2,901 ) Increase (decrease) in cash 995 (184 ) CASH AT BEGINNING OF YEAR 1,582 1,766 CASH AT END OF YEAR $ 2,577 $ 1,582 SUPPLEMENTAL INFORMATION Increase in common stock through increase in other, net $ 265 $ 183

Note 22 - Selected Quarterly Fi

Note 22 - Selected Quarterly Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Quarterly Financial Information [Text Block]	22. SELECTED QUARTERLY FINANCIAL DATA (Unaudited) (Dollar amounts in thousands) Three Months Ended March 31, June 30, September 30, December 31, 2019 2019 2019 2019 Total interest and dividend income $ 13,484 $ 13,720 $ 13,885 $ 13,436 Total interest expense 3,254 3,451 3,307 3,128 Net interest income 10,230 10,269 10,578 10,308 Provision for loan losses 240 110 80 460 Net interest income after provision for loan losses 9,990 10,159 10,498 9,848 Total noninterest income 1,132 1,299 1,105 1,305 Total noninterest expense 7,500 7,482 7,673 7,378 Income before income taxes 3,622 3,976 3,930 3,775 Income taxes 611 686 661 634 Net income $ 3,011 $ 3,290 $ 3,269 $ 3,141 Per share data: Net income Basic $ 0.46 $ 0.51 $ 0.51 $ 0.48 Diluted 0.46 0.50 0.50 0.49 Average shares outstanding: Basic 6,498,278 6,502,508 6,458,258 6,423,543 Diluted 6,510,568 6,514,946 6,479,066 6,455,387 (Dollar amounts in thousands) Three Months Ended March 31, June 30, September 30, December 31, 2018 2018 2018 2018 Total interest and dividend income $ 11,940 $ 12,129 $ 12,829 $ 13,459 Total interest expense 2,040 2,287 2,584 2,998 Net interest income 9,900 9,842 10,245 10,461 Provision for loan losses 210 210 210 210 Net interest income after provision for loan losses 9,690 9,632 10,035 10,251 Total noninterest income 788 1,009 954 977 Total noninterest expense 7,345 7,063 7,092 7,243 Income before income taxes 3,133 3,578 3,897 3,985 Income taxes 528 481 593 560 Net income $ 2,605 $ 3,097 $ 3,304 $ 3,425 Per share data: Net income Basic $ 0.41 $ 0.48 $ 0.51 $ 0.53 Diluted 0.40 0.48 0.51 0.53 Average shares outstanding: Basic 6,440,524 6,451,452 6,468,786 6,478,360 Diluted 6,476,138 6,480,658 6,496,652 6,500,298

Significant Accounting Policies

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	Nature of Operations and Basis of Presenta tion Middlefield Banc Corp. (the “Company”) is an Ohio corporation organized to become the holding company of The Middlefield Banking Company (“MBC”). MBC is a state-chartered bank located in Ohio, whose consolidated financial statements also include the accounts of MBC’s subsidiary, Middlefield Investments, Inc. (MI), established March 13, 2019. October 23, 2009, sixteen The consolidated financial statements of the Company include its wholly owned subsidiaries, MBC and EMORECO, Inc. Significant intercompany items have been eliminated in preparing the consolidated financial statements. The financial statements have been prepared in conformity with U.S. Generally Accepted Accounting Principles. In preparing the financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the balance sheet date and revenues and expenses for the period. Actual results could differ from those estimates.
Marketable Securities, Policy [Policy Text Block]	Investment and Equity Securities Investment securities are classified at the time of purchase, based on management’s intention and ability, as securities held to maturity or securities available for sale. Debt securities acquired with the intent and ability to hold to maturity are stated at cost adjusted for amortization of premium and accretion of discount, which are computed using a level yield method and recognized as adjustments of interest income. Certain other debt securities have been classified as available for sale to serve principally as a source of liquidity. Unrealized holding gains and losses for available-for-sale securities are reported as a separate component of stockholders’ equity, net of tax, until realized. Realized security gains and losses are computed using the specific identification method. Interest and dividends on investment securities are recognized as income when earned. For 2019 2018, Securities are evaluated on at least a quarterly basis and more frequently when economic or market conditions warrant such an evaluation to determine whether a decline in their value is other than temporary. For debt securities, management considers whether the present value of cash flows expected to be collected is less than the security’s amortized cost basis (the difference defined as the credit loss), the magnitude and duration of the decline, the reasons underlying the decline and the Bank’s intent to sell the security or whether it is more likely than not not not not one not
Stockholders' Equity, Policy [Policy Text Block]	Restricted Stock Common stock of the Federal Home Loan Bank (“FHLB”) represents ownership in an institution that is wholly owned by other financial institutions. This equity security is accounted for at cost and classified with other assets. The FHLB of Cincinnati has reported profits for 2019 2018, not December 31, 2019 2018.
Mortgage Banking Activity [Policy Text Block]	Mortgage Banking Activities Mortgage loans originated and intended for sale in the secondary market are carried at fair value. The Bank sells the loans on a servicing retained basis. Servicing rights are initially recorded at fair value with the income statement effect recorded in gains on sales of loans. The Bank measures servicing assets using the amortization method. Fair value is based on market prices for comparable mortgage servicing contracts, when available, or alternatively, is based on a valuation model that calculates the present value of estimated future net servicing income. Loan servicing rights are amortized in proportion to and over the period of estimated net future servicing revenue. The expected period of the estimated net servicing income is based in part on the expected prepayment of the underlying mortgages. The unamortized balance of mortgage servicing rights is included in accrued interest and other assets on the Consolidated Balance Sheet. Mortgage servicing rights are periodically evaluated for impairment. Impairment represents the excess of amortized cost over its estimated fair value. Impairment is determined by stratifying rights into tranches based on predominant risk characteristics, such as interest rate and original time to maturity. Any impairment is reported as a valuation allowance for an individual tranche. If the Company later determines that all or a portion of the impairment no Servicing fee income is recorded for fees earned for servicing loans. The fees are based on a contractual percentage of outstanding principal and are recorded as income when earned. The amortization of mortgage servicing rights is netted against loan servicing fee income. Late fees and ancillary fees related to loan servicing are not $70.8 $59.4 December 31, 2019 2018,
Financing Receivable [Policy Text Block]	Loans Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff generally are reported at their outstanding unpaid principal balances net of the allowance for loan and lease losses. Interest income is recognized as income when earned on the accrual method. The accrual of interest is discontinued on a loan when management believes, after considering economic and business conditions, the borrower’s financial condition is such that collection of interest is doubtful. Interest received on nonaccrual loans is recorded as income or applied against principal according to management’s judgment as to the collectability of such principal. Loan origination fees and certain direct loan origination costs are being deferred and the net amount amortized as an adjustment of the related loan’s yield. Management is amortizing these amounts over the contractual life of the related loans.
Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block]	Allowance for Loan and Lease Losses The allowance for loan and lease losses represents the amount which management estimates is adequate to provide for probable loan losses inherent in the loan portfolio. The allowance method is used in providing for loan losses. Accordingly, all loan losses are charged to the allowance, and all recoveries are credited to it. The allowance for loan and lease losses is established through a provision for loan losses which is charged to operations. The provision is based on management’s periodic evaluation of the adequacy of the allowance for loan and lease losses, which encompasses the overall risk characteristics of the various portfolio segments, past experience with losses, the impact of economic conditions on borrowers, and other relevant factors. The estimates used in determining the adequacy of the allowance for loan and lease losses, including the amounts and timing of future cash flows expected on impaired loans, are particularly susceptible to significant change in the near term. A loan is considered impaired when it is probable the borrower will not 89 not not first Mortgage loans secured by one four
Certain Loans and Debt Securities Acquired in Transfer, Recognizing Interest Income on Impaired Loans, Policy [Policy Text Block]	Loans Acquired Loans acquired, including loans that have evidence of deterioration of credit quality since origination and for which it is probable, at acquisition, that the Company will be unable to collect all contractually required payments receivable, are initially recorded at fair value (as determined by the present value of expected future cash flows) with no not For purchased loans acquired that are not
Property, Plant and Equipment, Policy [Policy Text Block]	Premises and Equipment Land is carried at cost. Premises and equipment are stated at cost net of accumulated depreciation. Depreciation is computed on the straight-line method over the estimated useful lives of the assets, which range from 3 20 3 40
Lessee, Leases [Policy Text Block]	Leases The Company has operating and financing leases for several branch locations and office space. Generally, the underlying lease agreements do not may may one Most leases include one As most of our leases do not
Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]	Goodwill The Company accounts for goodwill using a two No
Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block]	Intangible Assets Intangible assets include core deposit intangibles, which are a measure of the value of consumer demand and savings deposits acquired in business combinations accounted for as purchases. The core deposit intangibles are being amortized to their estimated residual values over their expected useful lives, commonly of ten
Life Insurance Corporate or Bank Owned [Policy Text Block]	Bank-Owned Life Insurance (“BOLI”) The Company owns insurance on the lives of a certain group of key employees. The policies were purchased to help offset the increase in the costs of various fringe benefit plans including healthcare. The cash surrender value of these policies is included as an asset on the Consolidated Balance Sheet and any increases in the cash surrender value are recorded as noninterest income on the Consolidated Statement of Income. In the event of the death of an insured individual under these policies, the Company would receive a death benefit, which would be recorded as tax-free noninterest income.
Real Estate, Policy [Policy Text Block]	Other Real Estate Owned Real estate properties acquired through foreclosure are initially recorded at fair value at the date of foreclosure, establishing a new cost basis. After foreclosure, management periodically performs valuations and the real estate is carried at the lower of cost or fair value less estimated cost to sell. Revenue and expenses from operations of the properties, gains or losses on sales and additions to the valuation allowance are included in operating results.
Income Tax, Policy [Policy Text Block]	Income Taxes The Company and its subsidiaries file a consolidated federal income tax return. Deferred tax assets and liabilities are reflected at currently enacted income tax rates applicable to the period in which the deferred tax assets or liabilities are expected to be realized or settled. As changes in tax laws or rates are enacted, deferred tax assets and liabilities are adjusted through the provision for income taxes.
Earnings Per Share, Policy [Policy Text Block]	Earnings Per Share The Company provides dual presentation of basic and diluted earnings per share. Basic earnings per share is calculated utilizing net income as reported in the numerator and average shares outstanding in the denominator. The computation of diluted earnings per share differs in that the dilutive effects of any stock options, warrants, and convertible securities are adjusted in the denominator. Earnings and dividends per share are restated for all stock splits and stock dividends through the date of issuance of the financial statements. (See Note 20
Share-based Payment Arrangement [Policy Text Block]	Stock-Based Compensation The Company accounts for stock compensation based on the grant date fair value of all share-based payment awards that are expected to vest, including employee share options to be recognized as employee compensation expense over the requisite service period. Compensation cost is recognized for restricted stock issued to employees based on the fair value of these awards at the date of grant. The market price of the Company’s common shares at the date of grant is used to estimate the fair value of restricted stock and stock awards. Compensation cost is recognized over the required service period, generally defined as the vesting period, and is recorded in "Salaries and employee benefits" expense. (See Note 14
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash Flow Information The Company has defined cash and cash equivalents as those amounts included in the Consolidated Balance Sheet captions as “Cash and due from banks” and “Federal funds sold” with original maturities of less than 90
Advertising Cost [Policy Text Block]	Advertising Costs Advertising costs are expensed as incurred.
Reclassification, Policy [Policy Text Block]	Reclassification of Comparative Amounts Certain comparative amounts for prior years have been reclassified to conform to current-year presentations. Such reclassifications did not
New Accounting Pronouncements, Policy [Policy Text Block]	Recently Adopted Accounting Pronouncements - In May 2014, 2014 09, Revenue from Contracts with Customers not not 606. January 1, 2018, 2. In January 2016, 2016 01, Financial Instruments – Overall (Subtopic 825 10 not January 1, 2018, 2016 01 $141,000 18 December 31, 2019 2018. In February 2016, 2016 02, Leases (Topic 842 one 12 not may January 1, 2019, 2016 02 $3.8 $1.1 15 In March 2017, 2017 08, Receivables – Nonrefundable Fees and Other Costs (Subtopic 310 20 not not In February 2018, 2018 02, Income Statement – Reporting Comprehensive Income (Topic 220 January 1, 2018, $187,000 In June 2018, 2018 07, Compensation – Stock Compensation (Topic 718 718 not Recently Issued Accounting Pronouncements - In June 2016, 2016 13, Financial Instruments – Credit Losses: Measurement of Credit Losses on Financial Instruments (“CECL”) 2016 13 December 15, 2019, December 15, 2018. first November 2019, 2019 10, Financial Instruments ‒ Credit Losses (Topic 326 815 Leases (Topic 842 2016 13 December 15, 2022, In January 2017, 2017 04, Simplifying the Test for Goodwill Impairment 2 2, not December 15, 2019. not December 15, 2020. not December 15, 2021. November 2019, 2019 10, Financial Instruments ‒ Credit Losses (Topic 326 Derivatives and Hedging (Topic 815 Leases (Topic 842 350, Intangibles – Goodwill and Other December 15, 2022, not In August 2018, 2018 13, Fair Value Measurement (Topic 820 December 15, 2019. In November 2019, 2019 11, Codification Improvements to Topic 326, 326, 2019 10. In December 2019, 2019 12, Income Taxes (Topic 740 not not December 15, 2020. December 15, 2021, December 15, 2022.

Note 2 - Revenue Recognition (T

Note 2 - Revenue Recognition (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Disaggregation of Revenue [Table Text Block]	Noninterest Income 2019 2018 (Dollar amounts in thousands) Service charges on deposit accounts: Overdraft fees $ 841 $ 798 ATM banking fees 932 867 Service charges and other fees 413 249 Investment securities gains on sale, net (a) 194 - Gain (loss) on equity securities (a) 94 (9 ) Earnings on bank-owned life insurance (a) 431 428 Gain on sale of loans (a) 433 231 Revenue from investment services 528 385 Other income 975 779 Total noninterest income $ 4,841 $ 3,728 Net gain (loss) on other real estate owned $ (123 ) $ (55 )

Note 3 - Earnings Per Share (Ta

Note 3 - Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Schedule of Weighted Average Number of Shares [Table Text Block]	2019 2018 Weighted-average common shares issued 7,286,554 7,232,238 Average treasury stock shares (816,146 ) (772,330 ) Weighted-average common shares and common stock equivalents used to calculate basic earnings per share 6,470,408 6,459,908 Additional common stock equivalents (stock options and restricted stock) used to calculate diluted earnings per share 32,398 27,906 Weighted-average common shares and common stock equivalents used to calculate diluted earnings per share 6,502,806 6,487,814

Note 4 - Investment and Equit_2

Note 4 - Investment and Equity Securities (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Schedule of Available-for-sale Securities Reconciliation [Table Text Block]	December 31, 2019 Gross Gross Amortized Unrealized Unrealized Fair (Dollar amounts in thousands) Cost Gains Losses Value Subordinated debt $ 4,000 $ 126 $ - $ 4,126 Obligations of states and political subdivisions: Taxable 500 1 - 501 Tax-exempt 80,436 2,065 (25 ) 82,476 Mortgage-backed securities in government-sponsored entities 18,465 274 (109 ) 18,630 Total $ 103,401 $ 2,466 $ (134 ) $ 105,733 December 31, 2018 Gross Gross Amortized Unrealized Unrealized Fair (Dollar amounts in thousands) Cost Gains Losses Value U.S. government agency securities $ 7,442 $ 90 $ (61 ) $ 7,471 Obligations of states and political subdivisions: Taxable 502 10 - 512 Tax-exempt 72,387 667 (473 ) 72,581 Mortgage-backed securities in government-sponsored entities 18,185 88 (515 ) 17,758 Total $ 98,516 $ 855 $ (1,049 ) $ 98,322
Investments Classified by Contractual Maturity Date [Table Text Block]	Amortized Fair (Dollar amounts in thousands) Cost Value Due in one year or less $ 148 $ 149 Due after one year through five years 1,324 1,345 Due after five years through ten years 16,613 16,908 Due after ten years 85,316 87,331 Total $ 103,401 $ 105,733
Realized Gain (Loss) on Investments [Table Text Block]	2019 2018 Proceeds from sales $ 12,324 $ - Gross realized gains 227 - Gross realized losses (33 ) -
Schedule of Unrealized Loss on Investments [Table Text Block]	December 31, 2019 Less than Twelve Months Twelve Months or Greater Total Gross Gross Gross Fair Unrealized Fair Unrealized Fair Unrealized (Dollar amounts in thousands) Value Losses Value Losses Value Losses Obligations of states and political subdivisions Tax-exempt $ 4,324 $ (25 ) $ - $ - $ 4,324 $ (25 ) Mortgage-backed securities in government-sponsored entities 1,409 (2 ) 8,223 (107 ) 9,632 (109 ) Total $ 5,733 $ (27 ) $ 8,223 $ (107 ) $ 13,956 $ (134 ) December 31, 2018 Less than Twelve Months Twelve Months or Greater Total Gross Gross Gross Fair Unrealized Fair Unrealized Fair Unrealized (Dollar amounts in thousands) Value Losses Value Losses Value Losses U.S. government agency securities $ - $ - $ 4,105 $ (61 ) $ 4,105 $ (61 ) Obligations of states and political subdivisions Tax-exempt 20,451 (286 ) 11,053 (187 ) 31,504 (473 ) Mortgage-backed securities in government-sponsored entities 2,068 (9 ) 12,257 (506 ) 14,325 (515 ) Total $ 22,519 $ (295 ) $ 27,415 $ (754 ) $ 49,934 $ (1,049 )

Note 5 - Loans and Related Al_2

Note 5 - Loans and Related Allowance for Loan and Lease Losses (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Schedule Of Financing Receivable By Segment [Table Text Block]	Real Estate-Mortgage December 31, 2019 Commercial and industrial Real estate- construction Residential Commercial Consumer installment Total Loans: Individually evaluated for impairment $ 882 $ - $ 1,628 $ 10,559 $ 1 $ 13,070 Collectively evaluated for impairment 88,645 63,246 345,419 459,468 14,410 971,188 Total loans $ 89,527 $ 63,246 $ 347,047 $ 470,027 $ 14,411 $ 984,258 Real estate-Mortgage December 31, 2018 Commercial and industrial Real estate- construction Residential Commercial Consumer installment Total Loans: Individually evaluated for impairment $ 2,570 $ - $ 1,970 $ 9,533 $ 2 $ 14,075 Collectively evaluated for impairment 81,287 56,731 334,517 488,714 16,785 978,034 Total loans $ 83,857 $ 56,731 $ 336,487 $ 498,247 $ 16,787 $ 992,109
Financing Receivable, Current, Allowance for Credit Loss [Table Text Block]	Real Estate-Mortgage December 31, 2019 Commercial and industrial Real estate- construction Residential Commercial Consumer installment Total Allowance for loan and lease losses: Ending allowance balance attributable to loans: Individually evaluated for impairment $ 3 $ - $ 30 $ 627 $ - $ 660 Collectively evaluated for impairment 453 97 1,628 3,902 28 6,108 Total ending allowance balance $ 456 $ 97 $ 1,658 $ 4,529 $ 28 $ 6,768 Real Estate-Mortgage December 31, 2018 Commercial and industrial Real estate- construction Residential Commercial Consumer installment Total Allowance for loan and lease losses: Ending allowance balance attributable to loans: Individually evaluated for impairment $ 667 $ - $ 43 $ 643 $ 1 $ 1,354 Collectively evaluated for impairment 302 100 1,538 4,008 126 6,074 Total ending allowance balance $ 969 $ 100 $ 1,581 $ 4,651 $ 127 $ 7,428 Commercial and industrial Real estate- construction Real estate- residential mortgage Real estate- commercial mortgage Consumer installment Total ALLL balance at December 31, 2018 $ 969 $ 100 $ 1,581 $ 4,651 $ 127 $ 7,428 Charge-offs (519 ) - (523 ) (32 ) (735 ) (1,809 ) Recoveries 82 74 78 17 8 259 Provision (76 ) (77 ) 522 (107 ) 628 890 ALLL balance at December 31, 2019 $ 456 $ 97 $ 1,658 $ 4,529 $ 28 $ 6,768 Commercial and industrial Real estate- construction Real estate- residential mortgage Real estate- commercial mortgage Consumer installment Total ALLL balance at December 31, 2017 $ 999 $ 313 $ 1,760 $ 4,036 $ 82 $ 7,190 Charge-offs (610 ) - (177 ) (111 ) (220 ) (1,118 ) Recoveries 287 63 128 - 38 516 Provision 293 (276 ) (130 ) 726 227 840 ALLL balance at December 31, 2018 $ 969 $ 100 $ 1,581 $ 4,651 $ 127 $ 7,428
Impaired Financing Receivables [Table Text Block]	December 31, 2019 Impaired Loans Recorded Unpaid Principal Related Investment Balance Allowance With no related allowance recorded: Commercial and industrial $ 747 $ 1,524 $ - Real estate - mortgage: Residential 979 1,057 - Commercial 5,617 5,617 - Consumer installment 1 1 - Total $ 7,344 $ 8,199 $ - With an allowance recorded: Commercial and industrial $ 135 $ 135 $ 3 Real estate - mortgage: Residential 649 700 30 Commercial 4,942 4,952 627 Total $ 5,726 $ 5,787 $ 660 Total: Commercial and industrial $ 882 $ 1,659 $ 3 Real estate - mortgage: Residential 1,628 1,757 30 Commercial 10,559 10,569 627 Consumer installment 1 1 - Total $ 13,070 $ 13,986 $ 660 December 31, 2018 Impaired Loans Recorded Unpaid Principal Related Investment Balance Allowance With no related allowance recorded: Commercial and industrial $ 207 $ 413 $ - Real estate - mortgage: Residential 1,306 1,462 - Commercial 1,867 2,186 - Total $ 3,380 $ 4,061 $ - With an allowance recorded: Commercial and industrial $ 2,363 $ 3,013 $ 667 Real estate - mortgage: Residential 664 715 43 Commercial 7,666 7,676 643 Consumer installment 2 2 1 Total $ 10,695 $ 11,406 $ 1,354 Total: Commercial and industrial $ 2,570 $ 3,426 $ 667 Real estate - mortgage: Residential 1,970 2,177 43 Commercial 9,533 9,862 643 Consumer installment 2 2 1 Total $ 14,075 $ 15,467 $ 1,354
Schedule of Additional Information Related to Impaired Loans [Table Text Block]	As of December 31, 2019 As of December 31, 2018 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized Commercial and industrial $ 1,770 $ 141 $ 4,210 $ 172 Real estate - construction 648 - 9 - Real estate - mortgage: Residential 1,803 51 2,531 57 Commercial 10,366 375 6,805 377 Consumer installment 2 - 3 - Total $ 14,589 $ 567 $ 13,558 $ 606
Financing Receivable, Troubled Debt Restructuring [Table Text Block]	December 31, 2019 Number of Contracts Pre-Modification Post-Modification Troubled Debt Restructurings Term Modification Other Total Outstanding Recorded Investment Outstanding Recorded Investment Commercial and industrial 3 - 3 $ 488 $ 490 Residential real estate 4 2 6 294 354 $ 782 $ 844 December 31, 2018 Number of Contracts Pre-Modification Post-Modification Troubled Debt Restructurings Term Modification Other Total Outstanding Recorded Investment Outstanding Recorded Investment Commercial and industrial 1 - 1 $ 44 $ 44 Residential real estate 3 2 5 286 286 Commercial real estate 1 - 1 94 94 $ 424 $ 424
Financing Receivable Credit Quality Indicators [Table Text Block]	Special Total December 31, 2019 Pass Mention Substandard Doubtful Loans Commercial and industrial $ 84,136 $ 3,619 $ 1,772 $ - $ 89,527 Real estate - construction 63,246 - - - 63,246 Real estate - mortgage: Residential 342,988 420 3,639 - 347,047 Commercial 453,170 6,989 9,868 - 470,027 Consumer installment 14,399 - 12 - 14,411 Total $ 957,939 $ 11,028 $ 15,291 $ - $ 984,258 Special Total December 31, 2018 Pass Mention Substandard Doubtful Loans Commercial and industrial $ 77,002 $ 4,572 $ 2,283 $ - $ 83,857 Real estate - construction 55,397 1,334 - - 56,731 Real estate - mortgage: Residential 332,475 553 3,459 - 336,487 Commercial 483,516 6,617 8,114 - 498,247 Consumer installment 16,776 - 11 - 16,787 Total $ 965,166 $ 13,076 $ 13,867 $ - $ 992,109
Financing Receivable, Past Due [Table Text Block]	30-59 Days 60-89 Days 90 Days+ Total Total December 31, 2019 Current Past Due Past Due Past Due Past Due Loans Commercial and industrial $ 88,965 $ 190 $ 66 $ 306 $ 562 89,527 Real estate - construction 63,246 - - - - 63,246 Real estate - mortgage: Residential 344,311 1,713 63 960 2,736 347,047 Commercial 465,666 63 - 4,298 4,361 470,027 Consumer installment 13,378 623 216 194 1,033 14,411 Total $ 975,566 $ 2,589 $ 345 $ 5,758 $ 8,692 $ 984,258 30-59 Days 60-89 Days 90 Days+ Total Total December 31, 2018 Current Past Due Past Due Past Due Past Due Loans Commercial and industrial $ 82,770 $ 288 $ 213 $ 586 $ 1,087 83,857 Real estate - construction 56,731 - - - - 56,731 Real estate - mortgage: Residential 331,379 2,612 1,083 1,413 5,108 336,487 Commercial 496,597 664 - 986 1,650 498,247 Consumer installment 16,768 19 - - 19 16,787 Total $ 984,245 $ 3,583 $ 1,296 $ 2,985 $ 7,864 992,109
Financing Receivable, Nonaccrual [Table Text Block]	December 31, 2019 Nonaccrual 90+ Days Past Due and Accruing Commercial and industrial $ 946 $ - Real estate - mortgage: Residential 3,285 - Commercial 4,451 - Consumer installment 197 - Total $ 8,879 $ - December 31, 2018 Nonaccrual 90+ Days Past Due and Accruing Commercial and industrial $ 996 $ 91 Real estate - mortgage: Residential 2,731 754 Commercial 2,864 100 Consumer installment 4 - Total $ 6,595 $ 945
Subsequently Defaulted [Member]
Notes Tables
Financing Receivable, Troubled Debt Restructuring [Table Text Block]	December 31, 2018 Troubled Debt Restructurings Number of Recorded subsequently defaulted Contracts Investment Residential real estate 1 $ 19

Note 6 - Premises and Equipme_2

Note 6 - Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Property, Plant and Equipment [Table Text Block]	(Dollar amounts in thousands) 2019 2018 Land and land improvements $ 2,920 $ 2,920 Building and leasehold improvements 15,836 15,377 Furniture, fixtures, and equipment 9,357 8,011 Financing right-of-use assets 4,012 - Total premises and equipment 32,125 26,308 Less accumulated depreciation and amortization 14,251 13,305 Total premises and equipment, net $ 17,874 $ 13,003

Note 7 - Goodwill and Intangi_2

Note 7 - Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	2020 $ 332 2021 321 2022 309 2023 296 2024 281 Thereafter 517 Total $ 2,056

Note 8 - Accrued Interest Rec_2

Note 8 - Accrued Interest Receivable and Other Assets (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Schedule of Other Assets [Table Text Block]	(Dollar amounts in thousands) 2019 2018 Restricted stock $ 3,848 $ 3,679 Accrued interest receivable on investment securities 753 794 Accrued interest receivable on loans 2,718 2,839 Deferred tax asset, net 374 1,232 Other real estate owned 155 270 Operating right-of-use assets 903 - Other 1,946 884 Total $ 10,697 $ 9,698

Note 9 - Deposits (Tables)

Note 9 - Deposits (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Time Deposit Maturities [Table Text Block]	(Dollar amounts in thousands) 2020 $ 251,291 2021 62,523 2022 25,195 2023 16,868 2024 12,923 Total $ 368,800

Note 10 - Short-term Borrowin_2

Note 10 - Short-term Borrowings (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Schedule of Short-term Debt [Table Text Block]	(Dollar amounts in thousands) 2019 2018 2017 Balance at year-end $ 5,075 $ 90,398 $ 74,707 Average balance outstanding 14,808 42,231 63,910 Maximum month-end balance 92,000 101,857 114,025 Weighted-average rate at year-end 1.66 % 2.53 % 1.36 % Weighted-average rate during the year 2.49 % 1.99 % 1.18 %

Note 11 - Other Borrowings (Tab

Note 11 - Other Borrowings (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Schedule of Debt [Table Text Block]	Weighted- Stated interest (Dollar amounts in thousands) Maturity range average rate range Description from to interest rate from to 2019 2018 Fixed-rate amortizing 07/01/25 10/01/28 4.06 % 4.02 % 4.47 % $ 404 $ 555 Finance lease liabilities 12/31/21 06/01/40 3.29 % 2.70 % 3.51 % 4,098 - Junior subordinated debt 12/21/37 12/21/37 4.10 % 3.61 % 4.42 % 8,248 8,248 Total $ 12,750 $ 8,803
Schedule of Maturities of Long-term Debt [Table Text Block]	(Dollar amounts in thousands) Weighted- Year Ending December 31, Amount Average Rate 2020 $ 445 3.36 % 2021 442 3.36 % 2022 434 3.36 % 2023 433 3.36 % 2024 430 3.36 % Beyond 2024 10,566 3.87 % Total $ 12,750 3.84 %

Note 12 - Accrued Interest Pa_2

Note 12 - Accrued Interest Payable and Other Liabilities (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Other Liabilities [Table Text Block]	2019 2018 (Dollar amounts in thousands) Accrued interest payable $ 917 $ 744 Accrued directors' benefits 1,470 1,346 Accrued salary and benefits expense 1,451 1,058 Operating lease liabilities 906 - Other 1,288 1,692 Total $ 6,032 $ 4,840

Note 13 - Income Taxes (Tables)

Note 13 - Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	(Dollar amounts in thousands) 2019 2018 Current payable $ 2,265 $ 2,403 Deferred 327 (241 ) Total provision $ 2,592 $ 2,162
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	(Dollar amounts in thousands) 2019 2018 Deferred tax assets: Allowance for loan and lease losses $ 1,288 $ 1,327 Supplemental retirement plan 469 454 Investment security basis adjustment 18 18 Nonaccrual interest income 297 389 Accrued compensation 244 222 Deferred origination fees, net 30 - Net unrealized loss on AFS securities - 41 Lease liability 1,051 - Gross deferred tax assets 3,397 2,451 Deferred tax liabilities: Premises and equipment 583 328 Net unrealized gain on AFS securities 490 - Net unrealized gain on equity securities 62 1 FHLB stock dividends 139 139 Intangibles 378 342 Mortgage servicing rights 82 75 Deferred origination fees, net - 13 Acquisition fair value adjustments 253 275 Right of use assets 1,032 - Other 4 5 Gross deferred tax liabilities 3,023 1,178 Net deferred tax assets $ 374 $ 1,273
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	(Dollar amounts in thousands) 2019 2018 % of % of Pretax Pretax Amount Income Amount Income Provision at statutory rate $ 3,214 21.0 % $ 3,065 21.0 % Tax-exempt income (647 ) (4.2 )% (622 ) (4.3 )% Nondeductible interest expense 32 0.2 % 27 0.2 % Stock-based compensation - - % (37 ) (0.3 )% Other (7 ) (0.1 )% (271 ) (1.8 )% Actual tax expense and effective rate $ 2,592 16.9 % $ 2,162 14.8 %

Note 14 - Employee Benefits (Ta

Note 14 - Employee Benefits (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Share-based Payment Arrangement, Option, Activity [Table Text Block]	Shares Weighted- average Exercise Price Per Share Outstanding, January 1, 2019 14,900 $ 8.78 Exercised (400 ) 8.78 Outstanding, December 31, 2019 14,500 $ 8.78 Exercisable, December 31, 2019 14,500 $ 8.78
Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]	Units Weighted- average Grant Date Fair Value Per Unit Nonvested at January 1, 2019 42,350 $ 20.98 Granted 29,130 20.95 Vested (10,440 ) 16.56 Nonvested at December 31, 2019 61,040 $ 21.72 Expected to vest at December 31, 2019 41,136 $ 20.57

Note 15 - Commitments (Tables)

Note 15 - Commitments (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Other Commitments [Table Text Block]	(Dollar amounts in thousands) 2019 2018 Commitments to extend credit $ 260,579 $ 228,427 Standby letters of credit 1,616 1,656 Total $ 262,195 $ 230,083
Lease, Cost [Table Text Block]	For the Twelve Months Ended December 31, 2019 Lease Costs: Finance lease cost: Amortization of right-of-use asset $ 360 Interest Expense 132 Other 57 Operating lease cost 245 Total lease cost $ 794
Lease, Term and Discount Rate [Table Text Block]	Operating Finance Weighted-average term (years) 6.5 13.7 Weighted-average discount rate 2.9 % 3.3 %
Operating and Finance Lease, Liability, Maturity [Table Text Block]	Operating Finance Undiscounted cash flows due within: 2020 $ 185 $ 458 2021 169 476 2022 169 478 2023 169 478 2024 133 478 2025 and thereafter 174 2,749 Total undiscounted cash flows 999 5,117 Impact of present value discount (93 ) (1,019 ) Amount reported on balance sheet $ 906 $ 4,098

Note 17 - Regulatory Capital (T

Note 17 - Regulatory Capital (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]	As of December 31, 2019 Leverage Tier 1 Risk Based Common Equity Tier 1 Total Risk Based The Middlefield Banking Company 10.35 % 12.12 % 12.12 % 12.79 % Middlefield Banc Corp. 10.23 % 12.56 % 11.77 % 13.23 % Adequately capitalized ratio 4.00 % 6.00 % 4.50 % 8.00 % Adequately capitalized ratio plus fully phased-in capital conservation buffer 4.00 % 8.50 % 7.00 % 10.50 % Well-capitalized ratio (Bank only) 5.00 % 8.00 % 6.50 % 10.00 % As of December 31, 2018 Leverage Tier 1 Risk Based Common Equity Tier 1 Total Risk Based The Middlefield Banking Company 9.60 % 11.09 % 11.09 % 11.83 % Middlefield Banc Corp. 10.35 % 11.83 % 11.04 % 12.57 % Adequately capitalized ratio 4.00 % 6.00 % 4.50 % 8.00 % Adequately capitalized ratio plus fully phased-in capital conservation buffer 4.00 % 8.50 % 7.00 % 10.50 % Well-capitalized ratio (Bank only) 5.00 % 8.00 % 6.50 % 10.00 %

Note 18 - Fair Value Disclosu_2

Note 18 - Fair Value Disclosure Measurements (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Fair Value, Assets Measured on Recurring Basis [Table Text Block]	December 31, 2019 (Dollar amounts in thousands) Level I Level II Level III Total Assets measured on a recurring basis: Subordinated debt $ - $ 4,126 $ - $ 4,126 Obligations of states and political subdivisions - 82,977 - 82,977 Mortgage-backed securities in government- sponsored entities - 18,630 - 18,630 Total debt securities - 105,733 - 105,733 Equity securities in financial institutions 710 - - 710 Total $ 710 $ 105,733 $ - $ 106,443 December 31, 2018 (Dollar amounts in thousands) Level I Level II Level III Total Assets measured on a recurring basis: U.S. government agency securities $ - $ 7,471 $ - $ 7,471 Obligations of states and political subdivisions - 73,093 - 73,093 Mortgage-backed securities in government- sponsored entities - 17,758 - 17,758 Total debt securities - 98,322 - 98,322 Equity securities in financial institutions 616 - - 616 Total $ 616 $ 98,322 $ - $ 98,938
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques [Table Text Block]	December 31, 2019 (Dollar amounts in thousands) Level I Level II Level III Total Assets measured on a non-recurring basis: Impaired loans $ - $ - $ 5,166 $ 5,166 December 31, 2018 (Dollar amounts in thousands) Level I Level II Level III Total Assets measured on a non-recurring basis: Impaired loans $ - $ - $ 1,075 $ 1,075
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]	Quantitative Information about Level III Fair Value Measurements (Dollar amounts in thousands) Fair Value Estimate Valuation Techniques Unobservable Input Range (Weighted Average) December 31, 2019 Impaired loans $ 5,166 Appraisal of collateral (1) Appraisal adjustments (2) 40.3% to 47.4% (41.8%) Quantitative Information about Level III Fair Value Measurements (Dollar amounts in thousands) Fair Value Estimate Valuation Techniques Unobservable Input Range (Weighted Average) December 31, 2018 Impaired loans $ 1,075 Appraisal of collateral (1) Appraisal adjustment (2) 0.0% to 100.0% (40.6%)
Fair Value, by Balance Sheet Grouping [Table Text Block]	December 31, 2019 Carrying Total Value Level I Level II Level III Fair Value (in thousands) Financial assets: Cash and cash equivalents $ 35,113 $ 35,113 $ - $ - $ 35,113 Loans held for sale 1,220 - 1,220 - 1,220 Net loans 977,490 - - 974,213 974,213 Bank-owned life insurance 16,511 16,511 - - 16,511 Federal Home Loan Bank stock 3,848 3,848 - - 3,848 Accrued interest receivable 3,471 3,471 - - 3,471 Financial liabilities: Deposits $ 1,020,843 $ 652,043 $ - $ 371,193 $ 1,023,236 Short-term borrowings 5,075 5,075 - - 5,075 Other borrowings 12,750 - - 12,783 12,783 Accrued interest payable 917 917 - - 917 December 31, 2018 Carrying Total Value Level I Level II Level III Fair Value (in thousands) Financial assets: Cash and cash equivalents $ 107,933 $ 107,933 $ - $ - $ 107,933 Loans held for sale 597 - 597 - 597 Net loans 984,681 - - 973,124 973,124 Bank-owned life insurance 16,080 16,080 - - 16,080 Federal Home Loan Bank stock 3,679 3,679 - - 3,679 Accrued interest receivable 3,633 3,633 - - 3,633 Financial liabilities: Deposits $ 1,016,067 $ 715,153 $ - $ 298,891 $ 1,014,044 Short-term borrowings 90,398 90,398 - - 90,398 Other borrowings 8,803 - - 8,827 8,827 Accrued interest payable 744 744 - - 744

Note 19 - Accumulated Other C_2

Note 19 - Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	Unrealized gains/(losses) on available-for-sale (Dollars in thousands) securities (a) Balance as of December 31, 2017 $ 1,091 Other comprehensive loss (1,291 ) Change in accounting principle, ASC 2016-01 (b) (141 ) Change in accounting principle, ASC 2018-02 (b) 187 Period change (1,245 ) Balance at December 31, 2018 $ (154 ) Balance as of December 31, 2018 $ (154 ) Other comprehensive income 2,149 Amount reclassified from accumulated other comprehensive income (153 ) Period change 1,996 Balance at December 31, 2019 $ 1,842
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]	Amount Reclassified from Affected Line Item in Accumulated Other the Statement Where (Dollars in thousands) Comprehensive Income Net Income is Details about other comprehensive income December 31, 2019 Presented Unrealized gains on available-for-sale securities (a) $ 194 Investment securities gains on sale, net (41 ) Income taxes $ 153

Note 20 - Stock Split Disclos_2

Note 20 - Stock Split Disclosure (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Effect of Stock Split [Table Text Block]	For the year ended December 31, 2018 Restated net income per common share - basic $ 1.92 Restated net income per common share - diluted $ 1.91 Restated weighted-average common shares issued 7,232,238 Restated average treasury stock shares (772,330 ) Restated average shares outstanding - basic 6,459,908 Restated stock options and restricted stock 27,906 Restated average shares outstanding - diluted 6,487,814 Restated period ending shares oustanding 6,488,664 Restated treasury shares outstanding 772,330

Note 21 - Parent Company (Table

Note 21 - Parent Company (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Condensed Balance Sheet [Table Text Block]	(Dollar amounts in thousands) December 31, 2019 2018 ASSETS Cash and due from banks $ 2,577 $ 1,582 Equity securities, at fair value 710 616 Investment in nonbank subsidiary 1,400 2,364 Investment in subsidiary bank 141,104 128,366 Other assets 977 4,080 TOTAL ASSETS $ 146,768 $ 137,008 LIABILITIES Trust preferred debt $ 8,248 $ 8,248 Other liabilities 745 470 TOTAL LIABILITIES 8,993 8,718 STOCKHOLDERS' EQUITY 137,775 128,290 TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY $ 146,768 $ 137,008
Condensed Income Statement [Table Text Block]	Year Ended December 31, (Dollar amounts in thousands) 2019 2018 INCOME Dividends from subsidiary bank $ 4,450 $ 4,650 Dividends from nonbank subsidiary 1,000 - Gain (loss) on equity securities 94 (9 ) Other 12 9 Total income 5,556 4,650 EXPENSES Interest expense 343 325 Other 2,949 2,119 Total expenses 3,292 2,444 Income before income tax benefit 2,264 2,206 Income tax benefit (669 ) (513 ) Income before equity in undistributed net income of subsidiaries 2,933 2,719 Equity in undistributed net income of subsidiaries 9,778 9,712 NET INCOME $ 12,711 $ 12,431 Comprehensive Income $ 14,707 $ 11,140
Condensed Cash Flow Statement [Table Text Block]	Year Ended December 31, (Dollar amounts in thousands) 2019 2018 OPERATING ACTIVITIES Net income $ 12,711 $ 12,431 Adjustments to reconcile net income to net cash provided by operating activities: Equity in undistributed net income of Middlefield Banking Company (10,742 ) (9,711 ) Equity in undistributed net loss of EMORECO 964 (1 ) Stock-based compensation 548 371 (Gain) loss on equity securities (94 ) 9 Other, net 3,095 (382 ) Net cash provided by operating activities 6,482 2,717 FINANCING ACTIVITIES Proceeds from issuance of common stock 95 92 Restricted stock cash portion (44 ) - Stock options exercised 4 168 Proceeds from dividend reinvestment plan 372 618 Repurchase of treasury shares (2,229 ) - Cash dividends (3,685 ) (3,779 ) Net cash (used in) financing activities (5,487 ) (2,901 ) Increase (decrease) in cash 995 (184 ) CASH AT BEGINNING OF YEAR 1,582 1,766 CASH AT END OF YEAR $ 2,577 $ 1,582 SUPPLEMENTAL INFORMATION Increase in common stock through increase in other, net $ 265 $ 183

Note 22 - Selected Quarterly _2

Note 22 - Selected Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Quarterly Financial Information [Table Text Block]	(Dollar amounts in thousands) Three Months Ended March 31, June 30, September 30, December 31, 2019 2019 2019 2019 Total interest and dividend income $ 13,484 $ 13,720 $ 13,885 $ 13,436 Total interest expense 3,254 3,451 3,307 3,128 Net interest income 10,230 10,269 10,578 10,308 Provision for loan losses 240 110 80 460 Net interest income after provision for loan losses 9,990 10,159 10,498 9,848 Total noninterest income 1,132 1,299 1,105 1,305 Total noninterest expense 7,500 7,482 7,673 7,378 Income before income taxes 3,622 3,976 3,930 3,775 Income taxes 611 686 661 634 Net income $ 3,011 $ 3,290 $ 3,269 $ 3,141 Per share data: Net income Basic $ 0.46 $ 0.51 $ 0.51 $ 0.48 Diluted 0.46 0.50 0.50 0.49 Average shares outstanding: Basic 6,498,278 6,502,508 6,458,258 6,423,543 Diluted 6,510,568 6,514,946 6,479,066 6,455,387 (Dollar amounts in thousands) Three Months Ended March 31, June 30, September 30, December 31, 2018 2018 2018 2018 Total interest and dividend income $ 11,940 $ 12,129 $ 12,829 $ 13,459 Total interest expense 2,040 2,287 2,584 2,998 Net interest income 9,900 9,842 10,245 10,461 Provision for loan losses 210 210 210 210 Net interest income after provision for loan losses 9,690 9,632 10,035 10,251 Total noninterest income 788 1,009 954 977 Total noninterest expense 7,345 7,063 7,092 7,243 Income before income taxes 3,133 3,578 3,897 3,985 Income taxes 528 481 593 560 Net income $ 2,605 $ 3,097 $ 3,304 $ 3,425 Per share data: Net income Basic $ 0.41 $ 0.48 $ 0.51 $ 0.53 Diluted 0.40 0.48 0.51 0.53 Average shares outstanding: Basic 6,440,524 6,451,452 6,468,786 6,478,360 Diluted 6,476,138 6,480,658 6,496,652 6,500,298

Note 1 - Summary of Significa_2

Note 1 - Summary of Significant Accounting Policies (Details Textual)	Jan. 01, 2018USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Jan. 01, 2019USD ($)
Number of Branches		16
Servicing Asset at Fair Value, Amount, Ending Balance		$ 70,800,000	$ 59,400,000
Goodwill, Impairment Loss		0	0
Finance Lease, Right-of-Use Asset		4,012,000
Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect	$ 187,000
Finance Lease, Liability, Total		4,098,000
Operating Lease, Right-of-Use Asset		$ 903,000
Accounting Standards Update 2016-01 [Member]
Reclassification of AOCI and Retained Earnings	$ 141,000
Accounting Standards Update 2016-02 [Member]
Finance Lease, Right-of-Use Asset				$ 3,800,000
Operating Lease, Liability, Total				1,100,000
Finance Lease, Liability, Total				3,800,000
Operating Lease, Right-of-Use Asset				$ 1,100,000
Core Deposits [Member]
Finite-Lived Intangible Asset, Useful Life		10 years
Furniture and Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life		3 years
Furniture and Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life		20 years
Building and Building Improvements [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life		3 years
Building and Building Improvements [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life		40 years

Note 2 - Revenue Recognition (D

Note 2 - Revenue Recognition (Details Textual)	12 Months Ended
	Dec. 31, 2019
Revenue from Interest Income and Noninterest Income, Percent	92.20%

Note 2 - Revenue Recognition -

Note 2 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($)		3 Months Ended								12 Months Ended
		Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Investment securities gains on sale, net	[1]									$ 194,000
Gain on equity securities	[1]									94,000	(9,000)
Earnings on bank-owned life insurance	[1]									431,000	428,000
Gain on sale of loans	[1]									433,000	231,000
Revenue from investment services										528,000	385,000
Other income										975,000	779,000
Total noninterest income		$ 1,305,000	$ 1,105,000	$ 1,299,000	$ 1,132,000	$ 977,000	$ 954,000	$ 1,009,000	$ 788,000	4,841,000	3,728,000
Net gain (loss) on other real estate owned										(123,000)	(55,000)
Overdraft Fees [Member]
Noninterest income revenue										841,000	798,000
ATM Banking Fees [Member]
Noninterest income revenue										932,000	867,000
Service Charge and Other Fees [Member]
Noninterest income revenue										$ 413,000	$ 249,000
[1]	Not within scope of ASC 606

Note 3 - Earnings Per Share (De

Note 3 - Earnings Per Share (Details Textual) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance	14,500	14,900
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Ending Balance	$ 8.78	$ 8.78	$ 8.78
Treasury Stock, Shares, Ending Balance	871,162	772,330
Treasury Stock, Shares, Acquired	98,832
Employee Stock Option and Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0	0
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance	61,040	42,350

Note 3 - Earnings Per Share - S

Note 3 - Earnings Per Share - Shares Used in Calculation of Earnings Per Share (Details) - shares	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Weighted-average common shares issued (in shares)									7,286,554	7,232,238
Average treasury stock shares (in shares)									(816,146)	(772,330)
Weighted-average common shares and common stock equivalents used to calculate basic earnings per share (in shares)	6,423,543	6,458,258	6,502,508	6,498,278	6,478,360	6,468,786	6,451,452	6,440,524	6,470,408	6,459,908
Additional common stock equivalents (stock options and restricted stock) used to calculate diluted earnings per share (in shares)									32,398	27,906
Weighted-average common shares and common stock equivalents used to calculate diluted earnings per share (in shares)	6,455,387	6,479,066	6,514,946	6,510,568	6,500,298	6,496,652	6,480,658	6,476,138	6,502,806	6,487,814

Note 4 - Investment and Equit_3

Note 4 - Investment and Equity Securities (Details Textual) - USD ($)		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Equity Securities, FV-NI		$ 710,000	$ 616,000
Equity Securities, FV-NI, Unrealized Gain (Loss), Total	[1]	94,000	(9,000)
Equity Securities, FV-NI, Realized Gain (Loss), Total		0	0
Security Owned and Pledged as Collateral, Fair Value, Total		55,600,000	63,500,000
Proceeds from Sale of Debt Securities, Available-for-sale		12,324,000	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax, Total		$ 41,000	0
Available-for-sale Securities, Percentage of Portfolio		96.10%
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held, Ending Balance		$ 0
Accounting Standards Update 2016-01 [Member]
Reclassification of Investment Securities Available for Sale to Equity Securities			$ 625,000
[1]	Not within scope of ASC 606

Note 4 - Investment and Equit_4

Note 4 - Investment and Equity Securities - Amortized Cost and Fair Values of Securities Available for Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Amortized cost	$ 103,401	$ 98,516
Gross unrealized gains	2,466	855
Gross unrealized losses	(134)	(1,049)
Investment securities available for sale, at fair value	105,733	98,322
Subordinated Debt Securities [Member]
Amortized cost	4,000
Gross unrealized gains	126
Gross unrealized losses
Investment securities available for sale, at fair value	4,126
US Government Agencies Debt Securities [Member]
Amortized cost		7,442
Gross unrealized gains		90
Gross unrealized losses		(61)
Investment securities available for sale, at fair value		7,471
Taxable Municipal Bonds [Member]
Amortized cost	500	502
Gross unrealized gains	1	10
Gross unrealized losses
Investment securities available for sale, at fair value	501	512
Nontaxable Municipal Bonds [Member]
Amortized cost	80,436	72,387
Gross unrealized gains	2,065	667
Gross unrealized losses	(25)	(473)
Investment securities available for sale, at fair value	82,476	72,581
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Amortized cost	18,465	18,185
Gross unrealized gains	274	88
Gross unrealized losses	(109)	(515)
Investment securities available for sale, at fair value	$ 18,630	$ 17,758

Note 4 - Investment and Equit_5

Note 4 - Investment and Equity Securities - Amortized Cost and Fair Value of Debt Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Due in one year or less, amortized costs	$ 148
Due in one year or less, fair value	149
Due after one year through five years, amortized costs	1,324
Due after one year through five years, fair value	1,345
Due after five years through ten years, amortized costs	16,613
Due after five years through ten years, fair value	16,908
Due after ten years, amortized costs	85,316
Due after ten years, fair value	87,331
Amortized costs	103,401	$ 98,516
Fair Value	$ 105,733	$ 98,322

Note 4 - Investment and Equit_6

Note 4 - Investment and Equity Securities - Sales of Available for Sale Securities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Proceeds from Sale of Debt Securities, Available-for-sale	$ 12,324,000	$ 0
Gross realized gains	227,000
Gross realized losses	$ (33,000)

Note 4 - Investment and Equit_7

Note 4 - Investment and Equity Securities - Gross Unrealized Losses and Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Less than Twelve Months, Fair Value	$ 5,733	$ 22,519
Less than Twelve Months, Gross Unrealized Losses	(27)	(295)
Twelve Months or Greater, Fair Value	8,223	27,415
Twelve Months or Greater, Gross Unrealized Losses	(107)	(754)
Total, Fair Value	13,956	49,934
Total, Gross Unrealized Losses	(134)	(1,049)
US Government Agencies Debt Securities [Member]
Less than Twelve Months, Fair Value
Less than Twelve Months, Gross Unrealized Losses
Twelve Months or Greater, Fair Value		4,105
Twelve Months or Greater, Gross Unrealized Losses		(61)
Total, Fair Value		4,105
Total, Gross Unrealized Losses		(61)
Nontaxable Municipal Bonds [Member]
Less than Twelve Months, Fair Value	4,324	20,451
Less than Twelve Months, Gross Unrealized Losses	(25)	(286)
Twelve Months or Greater, Fair Value		11,053
Twelve Months or Greater, Gross Unrealized Losses		(187)
Total, Fair Value	4,324	31,504
Total, Gross Unrealized Losses	(25)	(473)
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Less than Twelve Months, Fair Value	1,409	2,068
Less than Twelve Months, Gross Unrealized Losses	(2)	(9)
Twelve Months or Greater, Fair Value	8,223	12,257
Twelve Months or Greater, Gross Unrealized Losses	(107)	(506)
Total, Fair Value	9,632	14,325
Total, Gross Unrealized Losses	$ (109)	$ (515)

Note 5 - Loans and Related Al_3

Note 5 - Loans and Related Allowance for Loan and Lease Losses (Details Textual)	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017
Loans and Leases Receivable, Deferred Income, Total		$ 1,300,000	$ 1,600,000
Financing Receivable, Troubled Debt Restructuring		3,600,000	4,400,000
Financing Receivable, Allowance for Credit Loss, Writeoff		33,000	$ 459,000
Financing Receivable, Troubled Debt Restructuring, Subsequent Default		$ 36,000
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts		0	0
Number of Days Past Due		90 days
Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans		$ 342,000	$ 456,000
Allowance for Loan and Lease Losses, Write-offs		1,809,000	1,118,000
Commercial And Industrial [Member]
Allowance for Loan and Lease Losses, Write-offs		519,000	610,000
Consumer Portfolio Segment [Member]
Allowance for Loan and Lease Losses, Write-offs		735,000	220,000
Real Estate Construction Porfolio Segment [Member]
Allowance for Loan and Lease Losses, Write-offs
Loans and Leases Receivable, Historical Loss Rate	(0.127%)			0.775%
Threshold For Loans Evaluated For Impairment [Member]
Loans and Leases Receivable, before Fees, Gross		500,000
Threshold For Loans Evaluated For Impairment [Member] | Outside Consultant [Member]
Loans and Leases Receivable, before Fees, Gross		250,000
Threshold For Loans Evaluated For Impairment [Member] | Criticized Relationships [Member]
Loans and Leases Receivable, before Fees, Gross		125,000
Provision Fluctuation [Member] | Commercial And Industrial [Member]
Allowance for Loan and Lease Losses, Write-offs		438,000
Provision Fluctuation [Member] | Real Estate Mortgage Portfolio Segment [Member]
Allowance for Loan and Lease Losses, Write-offs		360,000
Provision Fluctuation [Member] | Consumer Portfolio Segment [Member]
Allowance for Loan and Lease Losses, Write-offs		$ 566,000

Note 5 - Loans and Related Al_4

Note 5 - Loans and Related Allowance for Loan and Lease Losses - Primary Segments of the Loan Portfolio (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Individually evaluated for impairment	$ 13,070	$ 14,075
Collectively evaluated for impairment	971,188	978,034
Total loans	984,258	992,109
Commercial And Industrial [Member]
Individually evaluated for impairment	882	2,570
Collectively evaluated for impairment	88,645	81,287
Total loans	89,527	83,857
Real Estate Construction Porfolio Segment [Member]
Individually evaluated for impairment
Collectively evaluated for impairment	63,246	56,731
Total loans	63,246	56,731
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member]
Individually evaluated for impairment	1,628	1,970
Collectively evaluated for impairment	345,419	334,517
Total loans	347,047	336,487
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member]
Individually evaluated for impairment	10,559	9,533
Collectively evaluated for impairment	459,468	488,714
Total loans	470,027	498,247
Consumer Portfolio Segment [Member]
Individually evaluated for impairment	1	2
Collectively evaluated for impairment	14,410	16,785
Total loans	$ 14,411	$ 16,787

Note 5 - Loans and Related Al_5

Note 5 - Loans and Related Allowance for Loan and Lease Losses - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Individually evaluated for impairment			$ 660	$ 1,354
Collectively evaluated for impairment			6,108	6,074
Less allowance for loan and lease losses	$ 7,428	$ 7,190	6,768	7,428
ALLL balance, period start	7,428	7,190
Charge-offs	(1,809)	(1,118)
Recoveries	259	516
Provision	890	840
ALLL balance, period end	6,768	7,428
Commercial And Industrial [Member]
Individually evaluated for impairment			3	667
Collectively evaluated for impairment			453	302
Less allowance for loan and lease losses	969	999	456	969
ALLL balance, period start	969	999
Charge-offs	(519)	(610)
Recoveries	82	287
Provision	(76)	293
ALLL balance, period end	456	969
Real Estate Construction Porfolio Segment [Member]
Individually evaluated for impairment
Collectively evaluated for impairment			97	100
Less allowance for loan and lease losses	100	313	97	100
ALLL balance, period start	100	313
Charge-offs
Recoveries	74	63
Provision	(77)	(276)
ALLL balance, period end	97	100
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member]
Individually evaluated for impairment			30	43
Collectively evaluated for impairment			1,628	1,538
Less allowance for loan and lease losses	1,581	1,760	1,658	1,581
ALLL balance, period start	1,581	1,760
Charge-offs	(523)	(177)
Recoveries	78	128
Provision	522	(130)
ALLL balance, period end	1,658	1,581
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member]
Individually evaluated for impairment			627	643
Collectively evaluated for impairment			3,902	4,008
Less allowance for loan and lease losses	4,651	4,036	4,529	4,651
ALLL balance, period start	4,651	4,036
Charge-offs	(32)	(111)
Recoveries	17
Provision	(107)	726
ALLL balance, period end	4,529	4,651
Consumer Portfolio Segment [Member]
Individually evaluated for impairment				1
Collectively evaluated for impairment			28	126
Less allowance for loan and lease losses	127	82	$ 28	$ 127
ALLL balance, period start	127	82
Charge-offs	(735)	(220)
Recoveries	8	38
Provision	628	227
ALLL balance, period end	$ 28	$ 127

Note 5 - Loans and Related Al_6

Note 5 - Loans and Related Allowance for Loan and Lease Losses - Impaired Loans by Class (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Recorded investment, with no related allowance	$ 7,344	$ 3,380
Unpaid principal balance, with no related allowance	8,199	4,061
Recorded investment, with related allowance	5,726	10,695
Unpaid principal balance, with related allowance	5,787	11,406
Related allowance	660	1,354
Recorded investment	13,070	14,075
Unpaid principal balance	13,986	15,467
Commercial Loans [Member]
Recorded investment, with related allowance	4,942
Unpaid principal balance, with related allowance	4,952
Related allowance	627
Commercial And Industrial [Member]
Recorded investment, with no related allowance	747	207
Unpaid principal balance, with no related allowance	1,524	413
Recorded investment, with related allowance	135	2,363
Unpaid principal balance, with related allowance	135	3,013
Related allowance	3	667
Recorded investment	882	2,570
Unpaid principal balance	1,659	3,426
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member]
Recorded investment, with no related allowance	979	1,306
Unpaid principal balance, with no related allowance	1,057	1,462
Recorded investment, with related allowance		664
Unpaid principal balance, with related allowance		715
Related allowance	30	43
Recorded investment	1,628	1,970
Unpaid principal balance	1,757	2,177
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member]
Recorded investment, with no related allowance	5,617	1,867
Unpaid principal balance, with no related allowance	5,617	2,186
Recorded investment, with related allowance		7,666
Unpaid principal balance, with related allowance		7,676
Related allowance	627	643
Recorded investment	10,559	9,533
Unpaid principal balance	10,569	9,862
Consumer Portfolio Segment [Member]
Recorded investment, with no related allowance	1
Unpaid principal balance, with no related allowance	1
Recorded investment, with related allowance		2
Unpaid principal balance, with related allowance		2
Related allowance		1
Recorded investment	1	2
Unpaid principal balance	1	$ 2
Real Estate Construction Porfolio Segment [Member] | Residential Loan [Member]
Recorded investment, with related allowance	649
Unpaid principal balance, with related allowance	700
Related allowance	$ 30

Note 5 - Loans and Related Al_7

Note 5 - Loans and Related Allowance for Loan and Lease Losses - Additional Information on Impaired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Average recorded investment	$ 14,589	$ 13,558
Interest income recognized	567	606
Commercial And Industrial [Member]
Average recorded investment	1,770	4,210
Interest income recognized	141	172
Real Estate Construction Porfolio Segment [Member]
Average recorded investment	648	9
Interest income recognized
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member]
Average recorded investment	1,803	2,531
Interest income recognized	51	57
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member]
Average recorded investment	10,366	6,805
Interest income recognized	375	377
Consumer Portfolio Segment [Member]
Average recorded investment	2	3
Interest income recognized

Note 5 - Loans and Related Al_8

Note 5 - Loans and Related Allowance for Loan and Lease Losses - Troubled Debt Restructurings (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Number of contracts
Pre-modification outstanding recorded investment	$ 782	$ 424
Post-modification outstanding recorded investment	$ 844	$ 424
Commercial And Industrial [Member]
Number of contracts	3	1
Pre-modification outstanding recorded investment	$ 488	$ 44
Post-modification outstanding recorded investment	$ 490	$ 44
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member]
Number of contracts	6	5
Pre-modification outstanding recorded investment	$ 294	$ 286
Post-modification outstanding recorded investment	$ 354	$ 286
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member]
Number of contracts		1
Pre-modification outstanding recorded investment		$ 94
Post-modification outstanding recorded investment		$ 94
Extended Maturity [Member]
Number of contracts
Extended Maturity [Member] | Commercial And Industrial [Member]
Number of contracts	3	1
Extended Maturity [Member] | Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member]
Number of contracts	4	3
Extended Maturity [Member] | Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member]
Number of contracts		1
Other Restructurings [Member]
Number of contracts
Other Restructurings [Member] | Commercial And Industrial [Member]
Number of contracts
Other Restructurings [Member] | Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member]
Number of contracts	2	2
Other Restructurings [Member] | Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member]
Number of contracts

Note 5 - Loans and Related Al_9

Note 5 - Loans and Related Allowance for Loan and Lease Losses - Troubled Debt Restructurings Subsequently Defaulted (Details)	12 Months Ended
	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Number of contracts, subsequently defaulted	0	0
Recorded investment, subsequently defaulted	$ 36,000
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member]
Number of contracts, subsequently defaulted		1
Recorded investment, subsequently defaulted		$ 19,000

Note 5 - Loans and Related A_10

Note 5 - Loans and Related Allowance for Loan and Lease Losses - Classes of the Loan Portfolio Summarized by Credit Quality (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Loans	$ 984,258	$ 992,109
Commercial And Industrial [Member]
Loans	89,527	83,857
Real Estate Construction Porfolio Segment [Member]
Loans	63,246	56,731
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member]
Loans	347,047	336,487
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member]
Loans	470,027	498,247
Consumer Portfolio Segment [Member]
Loans	14,411	16,787
Pass [Member]
Loans	957,939	965,166
Pass [Member] | Commercial And Industrial [Member]
Loans	84,136	77,002
Pass [Member] | Real Estate Construction Porfolio Segment [Member]
Loans	63,246	55,397
Pass [Member] | Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member]
Loans	342,988	332,475
Pass [Member] | Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member]
Loans	453,170	483,516
Pass [Member] | Consumer Portfolio Segment [Member]
Loans	14,399	16,776
Special Mention [Member]
Loans	11,028	13,076
Special Mention [Member] | Commercial And Industrial [Member]
Loans	3,619	4,572
Special Mention [Member] | Real Estate Construction Porfolio Segment [Member]
Loans		1,334
Special Mention [Member] | Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member]
Loans	420	553
Special Mention [Member] | Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member]
Loans	6,989	6,617
Substandard [Member]
Loans	15,291	13,867
Substandard [Member] | Commercial And Industrial [Member]
Loans	1,772	2,283
Substandard [Member] | Real Estate Construction Porfolio Segment [Member]
Loans
Substandard [Member] | Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member]
Loans	3,639	3,459
Substandard [Member] | Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member]
Loans	9,868	8,114
Substandard [Member] | Consumer Portfolio Segment [Member]
Loans	12	11
Doubtful [Member]
Loans
Doubtful [Member] | Commercial And Industrial [Member]
Loans
Doubtful [Member] | Real Estate Construction Porfolio Segment [Member]
Loans
Doubtful [Member] | Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member]
Loans
Doubtful [Member] | Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member]
Loans

Note 5 - Loans and Related A_11

Note 5 - Loans and Related Allowance for Loan and Lease Losses - Past Due Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Loans, current balance	$ 975,566	$ 984,245
Loans, past due	8,692	7,864
Loans	984,258	992,109
Financial Asset, 30 to 59 Days Past Due [Member]
Loans, past due	2,589	3,583
Financial Asset, 60 to 89 Days Past Due [Member]
Loans, past due	345	1,296
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans, past due	5,758	2,985
Commercial And Industrial [Member]
Loans, current balance	88,965	82,770
Loans, past due	562	1,087
Loans	89,527	83,857
Commercial And Industrial [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans, past due	190	288
Commercial And Industrial [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans, past due	66	213
Commercial And Industrial [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans, past due	306	586
Real Estate Construction Porfolio Segment [Member]
Loans, current balance	63,246	56,731
Loans, past due
Loans	63,246	56,731
Real Estate Construction Porfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans, past due
Real Estate Construction Porfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans, past due
Real Estate Construction Porfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans, past due	0	0
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member]
Loans, current balance	344,311	331,379
Loans, past due	2,736	5,108
Loans	347,047	336,487
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member]
Loans, current balance	465,666	496,597
Loans, past due	4,361	1,650
Loans	470,027	498,247
Real Estate Mortgage Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Residential Loan [Member]
Loans, past due	1,713	2,612
Real Estate Mortgage Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Loans [Member]
Loans, past due	63	664
Real Estate Mortgage Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Residential Loan [Member]
Loans, past due	63	1,083
Real Estate Mortgage Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Loans [Member]
Loans, past due
Real Estate Mortgage Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Residential Loan [Member]
Loans, past due	960	1,413
Real Estate Mortgage Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Loans [Member]
Loans, past due	4,298	986
Consumer Portfolio Segment [Member]
Loans, current balance	13,378	16,768
Loans, past due	1,033	19
Loans	14,411	16,787
Consumer Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans, past due	623	19
Consumer Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans, past due	216
Consumer Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans, past due	$ 194	$ 0

Note 5 - Loans and Related A_12

Note 5 - Loans and Related Allowance for Loan and Lease Losses - Nonaccrual Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Loans, nonacrrual status	$ 8,879	$ 6,595
Loans, 90+ days past due and accruing	0	945
Commercial And Industrial [Member]
Loans, nonacrrual status	946	996
Loans, 90+ days past due and accruing	0	91
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member]
Loans, nonacrrual status	3,285	2,731
Loans, 90+ days past due and accruing	0	754
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member]
Loans, nonacrrual status	4,451	2,864
Loans, 90+ days past due and accruing	0	100
Consumer Portfolio Segment [Member]
Loans, nonacrrual status	197	4
Loans, 90+ days past due and accruing	$ 0	$ 0

Note 6 - Premises and Equipme_3

Note 6 - Premises and Equipment (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Depreciation, Total	$ 1,000,000	$ 951,000

Note 6 - Premises and Equipme_4

Note 6 - Premises and Equipment - Major Classifications of Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Land and land improvements	$ 2,920	$ 2,920
Building and leasehold improvements	15,836	15,377
Furniture, fixtures, and equipment	9,357	8,011
Financing right-of-use assets	4,012
Total premises and equipment	32,125	26,308
Less accumulated depreciation and amortization	14,251	13,305
Total premises and equipment, net	$ 17,874	$ 13,003

Note 7 - Goodwill and Intangi_3

Note 7 - Goodwill and Intangible Assets (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Goodwill, Ending Balance	$ 15,071,000	$ 15,071,000
Finite-Lived Core Deposits, Gross	2,100,000	2,400,000
Amortization of Intangible Assets, Total	341,000	352,000
Core Deposits [Member]
Finite-Lived Intangible Assets, Accumulated Amortization	$ 1,400,000	$ 1,000,000
Finite-Lived Intangible Asset, Useful Life	10 years

Note 7 - Goodwill and Intangi_4

Note 7 - Goodwill and Intangible Assets - Estimated Aggregate Future Amortization Expense for Core Deposit Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
2023	$ 296
2024	281
Total	2,056	$ 2,397
Core Deposits [Member]
2020	332
2021	321
2022	309
Thereafter	$ 517

Note 8 - Accrued Interest Rec_3

Note 8 - Accrued Interest Receivable and Other Assets - Components of Accrued Interest Receivable and Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Restricted stock	$ 3,848	$ 3,679
Deferred tax asset, net	374	1,232
Other real estate owned	155	270
Operating right-of-use assets	903
Other	1,946	884
Total	10,697	9,698
Investment Securities [Member]
Accrued interest	753	794
Loans [Member]
Accrued interest	$ 2,718	$ 2,839

Note 9 - Deposits (Details Text

Note 9 - Deposits (Details Textual) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Time Deposits, at or Above FDIC Insurance Limit	$ 126.6	$ 75.8

Note 9 - Deposits (Details)

Note 9 - Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
2020	$ 251,291
2021	62,523
2022	25,195
2023	16,868
2024	12,923
Total	$ 368,800	$ 300,914

Note 10 - Short-term Borrowin_3

Note 10 - Short-term Borrowings (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Long-term Line of Credit, Total	$ 0	$ 0
Federal Home Loan Bank Advances, Additional Borrowing Capacity	87,000	$ 27,000
Line of Credit 1 [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 6,000
Line of Credit Facility, Interest Rate During Period	5.00%
Line of Credit 2 [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 10,000
Line of Credit Facility, Interest Rate During Period	4.93%
Line of Credit 3 [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 4,000
Line of Credit Facility, Interest Rate During Period	5.51%

Note 10 - Short-term Borrowin_4

Note 10 - Short-term Borrowings - Outstanding Balances and Related Information of Short-term Borrowings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Balance at year-end	$ 5,075	$ 90,398	$ 74,707
Average balance outstanding	14,808	42,231	63,910
Maximum month-end balance	$ 92,000	$ 101,857	$ 114,025
Weighted-average rate at year-end	1.66%	2.53%	1.36%
Weighted-average rate during the year	2.49%	1.99%	1.18%

Note 11 - Other Borrowings (Det

Note 11 - Other Borrowings (Details Textual) - USD ($)	1 Months Ended	12 Months Ended
	Dec. 31, 2006	Dec. 31, 2019	Jan. 01, 2019
Annual Paydown of Principal Required		20.00%
Federal Home Loan Bank, Advances, General Debt Obligations, Amount of Available, Unused Funds		$ 273,400,000
Stock Issued During Period, Value, New Issues	$ 248,000
Notes Payable, Total	$ 8,300,000
Finance Lease, Liability, Total		4,098,000
Accounting Standards Update 2016-02 [Member]
Finance Lease, Liability, Total			$ 3,800,000
London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	1.67%
Mandatorily Redeemable Securities [Member] | Special Purpose Entity [Member]
Securities Sold under Agreements to Repurchase, Total	$ 8,000,000
Letter of Credit [Member]
Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available		10,000,000
Advances from Federal Home Loan Banks, Total		$ 0

Note 11 - Other Borrowings - Ot

Note 11 - Other Borrowings - Other Borrowings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Maturity range, maximum
Other borrowings	$ 12,750	$ 8,803
Minimum [Member]
Stated interest rate
Maximum [Member]
Stated interest rate
Fixed Rate Amortizing [Member]
Maturity range, minimum	Jul. 1, 2025
Maturity range, maximum	Oct. 1, 2028
Weighted-average interest rate	4.06%
Other borrowings	$ 404	555
Fixed Rate Amortizing [Member] | Minimum [Member]
Stated interest rate	4.02%
Fixed Rate Amortizing [Member] | Maximum [Member]
Stated interest rate	4.47%
Finance Lease Liabilities [Member]
Maturity range, minimum	Dec. 31, 2021
Maturity range, maximum	Jun. 1, 2040
Weighted-average interest rate	3.29%
Other borrowings	$ 4,098
Finance Lease Liabilities [Member] | Minimum [Member]
Stated interest rate	2.70%
Finance Lease Liabilities [Member] | Maximum [Member]
Stated interest rate	3.51%
Junior Subordinated Debt [Member]
Maturity range, minimum	Dec. 21, 2037
Maturity range, maximum	Dec. 21, 2037
Weighted-average interest rate	4.10%
Other borrowings	$ 8,248	$ 8,248
Junior Subordinated Debt [Member] | Minimum [Member]
Stated interest rate	3.61%
Junior Subordinated Debt [Member] | Maximum [Member]
Stated interest rate	4.42%

Note 11 - Other Borrowings - Ma

Note 11 - Other Borrowings - Maturities of Other Borrowings (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
2020, amount	$ 445
2020, weighted-average interest rate	3.36%
2021, amount	$ 442
2021, weighted-average interest rate	3.36%
2022, amount	$ 434
2022, weighted-average interest rate	3.36%
2023, amount	$ 433
2023, weighted-average interest rate	3.36%
2024	$ 430
2024	3.36%
Beyond 2023, amount	$ 10,566
Beyond 2023, weighted-average interest rate	3.87%
Total, amount	$ 12,750	$ 8,803
Total, weighted-average interest rate	3.84%

Note 12 - Accrued Interest Pa_3

Note 12 - Accrued Interest Payable and Other Liabilities - Components of Accrued Interest Payable and Other Liabilities (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Accrued interest payable	$ 917,000	$ 744,000
Accrued directors' benefits	1,470,000	1,346,000
Accrued salary and benefits expense	1,451,000	1,058,000
Other	1,288,000	1,692,000
Total	6,032,000	4,840,000
Accrued Interest Payable and Other Liabilities [Member]
Operating lease liabilities	$ 906,000

Note 13 - Income Taxes (Details

Note 13 - Income Taxes (Details Textual) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred Tax Assets, Valuation Allowance, Total	$ 0	$ 0

Note 13 - Income Taxes - The Pr

Note 13 - Income Taxes - The Provision (Benefit) for Federal Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Current payable									$ 2,265	$ 2,403
Deferred income tax									327	(241)
Total provision	$ 634	$ 661	$ 686	$ 611	$ 560	$ 593	$ 481	$ 528	$ 2,592	$ 2,162

Note 13 - Income Taxes - Deferr

Note 13 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Allowance for loan and lease losses	$ 1,288	$ 1,327
Supplemental retirement plan	469	454
Investment security basis adjustment	18	18
Nonaccrual interest income	297	389
Accrued compensation	244	222
Deferred origination fees, net	30
Net unrealized loss on AFS securities		41
Lease liability	1,051
Gross deferred tax assets	3,397	2,451
Deferred tax liabilities:
Premises and equipment	583	328
Net unrealized gain on AFS securities	490
Net unrealized gain on equity securities	62	1
FHLB stock dividends	139	139
Intangibles	378	342
Mortgage servicing rights	82	75
Deferred origination fees, net		13
Acquisition fair value adjustments	253	275
Right of use assets	1,032
Other	4	5
Gross deferred tax liabilities	3,023	1,178
Net deferred tax assets	$ 374	$ 1,273

Note 13 - Income Taxes - Tax Ra

Note 13 - Income Taxes - Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Provision at statutory rate, amount									$ 3,214	$ 3,065
Provision at statutory rate, percent									21.00%	21.00%
Tax-exempt income, amount									$ (647)	$ (622)
Tax-exempt income, percent									(4.20%)	(4.30%)
Nondeductible interest expense, amount									$ 32	$ 27
Nondeductible interest expense, percent									0.20%	0.20%
Stock-based compensation, amount										$ (37)
Stock-based compensation, percent										(0.30%)
Other, amount									$ (7)	$ (271)
Other, percent									(0.10%)	(1.80%)
Total provision	$ 634	$ 661	$ 686	$ 611	$ 560	$ 593	$ 481	$ 528	$ 2,592	$ 2,162
Actual tax expense and effective rate, percent									16.90%	14.80%

Note 14 - Employee Benefits (De

Note 14 - Employee Benefits (Details Textual) - USD ($)	May 10, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2007
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value		$ 251,068	$ 185,356
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount		$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period		400	24,600
Share-based Payment Arrangement, Option [Member]
Payments For Stock Options Exercised		$ 0	$ 85,000
Restricted Stock [Member]
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture, Total		29,130	22,702
Share-based Payment Arrangement, Expense		$ 184,000	$ 191,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Average Total Shareholder Annual Return, Percentage		10.00%	8.00%
Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount		$ 715,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition		1 year 302 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value		$ 265,000	$ 205,000
Retirement Plan [Member]
Defined Contribution Plan Employer Voluntary Matching Bank Contribution		50.00%	50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay		6.00%	6.00%
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		6 years
Defined Benefit Plan, Plan Assets, Contributions by Employer		$ 319,000	$ 306,000
Retirement Plan [Member] | Middlefield Banking Company [Member]
Defined Contribution Plan Annual Vesting Percentage		20.00%
Retirement Plan [Member] | Liberty Bank, N.A. [Member]
Deferred Compensation Arrangement with Individual, Requisite Service Period		3 years
Executive Deferred Compensation Plan [Member] | Middlefield Banking Company [Member]
Deferred Compensation Arrangement with Individual, Recorded Liability		$ 615,000	504,000
Defined Contribution Plan, Employer Discretionary Contribution Amount		$ 85,000	$ 98,000
Stock Option and Restricted Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized				320,000
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term				10 years
Shares, Outstanding, Ending Balance		14,500
The 2017 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	448,000
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant		386,188
Omnibus Equity Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross		0	0
Share-based Payment Arrangement, Expensed and Capitalized, Amount, Total		$ 265,000	$ 215,000

Note 14 - Employee Benefits - S

Note 14 - Employee Benefits - Stock Option Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Outstanding (in shares)	14,900
Outstanding, weighted average exercise price (in dollars per share)	$ 8.78	$ 8.78
Exercised (in shares)	(400)
Exercised, weighted average exercise price (in dollars per share)		$ 8.78
Outstanding (in shares)	14,500	14,900
Outstanding, weighted average exercise price (in dollars per share)	$ 8.78	$ 8.78
Exercisable (in shares)	14,500
Exercisable, weighted average exercise price (in dollars per share)		$ 8.78

Note 14 - Employee Benefits - A

Note 14 - Employee Benefits - Activity Related to Restricted Stock Units Awarded (Details) - Restricted Stock [Member] - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Nonvested (in shares)	42,350
Nonvested, weighted average grant date fair value per share (in dollars per share)	$ 21.72	$ 20.98
Granted (in shares)	29,130
Granted, weighted average grant date fair value per share (in dollars per share)		20.95
Vested (in shares)	(10,440)
Vested, weighted average grant date fair value per share (in dollars per share)		$ 16.56
Nonvested (in shares)	61,040	42,350
Nonvested, weighted average grant date fair value per share (in dollars per share)		$ 21.72
Expected to vest at December 31, 2019 (in shares)	41,136
Expected to vest at December 31, 2019 (in dollars per share)		$ 20.57

Note 15 - Commitments (Details

Note 15 - Commitments (Details Textual)	12 Months Ended
	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Number of Branch Locations by Utilized Leases	7
Number of Production Offices by Utilized Leases	1
Lease, Right-of-Use Asset, Net	$ 4,900,000
Finance Lease, Right-of-Use Asset	4,012,000
Operating Lease, Right-of-Use Asset	903,000
Finance Lease, Liability, Total	4,098,000
Premises and Equipment, Net [Member]
Finance Lease, Right-of-Use Asset	4,000,000
Accrued Interest Receivable and Other Assets [Member]
Operating Lease, Right-of-Use Asset	903,000
Other Borrowings [Member]
Finance Lease, Liability, Total	4,100,000
Accrued Interest Payable and Other Liabilities [Member]
Operating Lease, Liability, Total	$ 906,000
Minimum [Member]
Lessee, Operating Lease, Remaining Term	1 year
Maximum [Member]
Lessee, Operating Lease, Remaining Term	20 years

Note 15 - Commitments - Outstan

Note 15 - Commitments - Outstanding Commitments and Contingent Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Commitments	$ 262,195	$ 230,083
Commitments to Extend Credit [Member]
Commitments	260,579	228,427
Financial Standby Letter of Credit [Member]
Commitments	$ 1,616	$ 1,656

Note 15 - Commitments - Leases

Note 15 - Commitments - Leases Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Finance lease cost, Amortization of right-of-use asset	$ 360
Finance lease cost, Interest Expense	132
Finance lease cost, Other	57
Operating lease cost	245
Total lease cost	$ 794

Note 15 - Commitments - Weighte

Note 15 - Commitments - Weighted Average Remaining Lease Term and Discount Rate Information (Details)	Dec. 31, 2019
Weighted-average term (years), Operating Lease (Year)	6 years 182 days
Weighted-average term (years), Fiance Lease (Year)	13 years 255 days
Weighted-average discount rate), Operating Lease	2.90%
Weighted-average discount rate, Fiance Lease	3.30%

Note 15 - Commitments - Maturit

Note 15 - Commitments - Maturities of Lease liabilities (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
2020	$ 185,000
2020	458,000
2021	169,000
2021	476,000
2022	169,000
2022	478,000
2023	169,000
2023	478,000
2024	133,000
2024	478,000
2025 and thereafter	174,000
2025 and thereafter	2,749,000
Total undiscounted cash flows	999,000
Total undiscounted cash flows	5,117,000
Impact of present value discount	(93,000)
Impact of present value discount	(1,019,000)
Finance Lease, Liability, Total	4,098,000
Accrued Interest Payable and Other Liabilities [Member]
Operating Lease, Liability, Total	$ 906,000

Note 16 - Regulatory Restrict_2

Note 16 - Regulatory Restrictions (Details Textual) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Reserves Required by Federal Reserve Bank	$ 16.5	$ 17.3
Percent of Common Stock		10.00%
Amount Available for Payment of Dividends	$ 20.5

Note 17 - Regulatory Capital -

Note 17 - Regulatory Capital - Capital Ratios (Details)	Dec. 31, 2019	Dec. 31, 2018
Leverage capital, adequately capitalized, ratio	4.00%	4.00%
Tier 1 risk based capital, adequately capitalized, ratio	6.00%	6.00%
Common equity tier 1 capital, adequately capitalized, ratio	4.50%	4.50%
Total risk based capital, adequately capitalized, ratio	8.00%	8.00%
Leverage capital, adequately capitalized plus capital conservation buffer, ratio	4.00%	4.00%
Tier 1 risk based capital, adequately capitalized plus capital conservation buffer, ratio	8.50%	8.50%
Common equity tier 1 capital, adequately capitalized plus capital conservation buffer, ratio	7.00%	7.00%
Total risk based capital, adequately capitalized plus capital conservation buffer, ratio	10.50%	10.50%
Middlefield Banking Company [Member]
Leverage capital, actual, ratio	10.35%	9.60%
Tier 1 risk based capital, actual, ratio	12.12%	11.09%
Common equity tier 1 capital, actual, ratio	12.12%	11.09%
Total risk based capital, actual, ratio	12.79%	11.83%
Leverage capital, well-capitalized, ratio (bank only)	5.00%	5.00%
Tier 1 risk based capital, well-capitalized, ratio (bank only)	8.00%	8.00%
Common equity tier 1 capital, well-capitalized, ratio (bank only)	6.50%	6.50%
Total risk based capital, well-capitalized, ratio (bank only)	10.00%	10.00%
Middlefield Banc Corp [Member]
Leverage capital, actual, ratio	10.23%	10.35%
Tier 1 risk based capital, actual, ratio	12.56%	11.83%
Common equity tier 1 capital, actual, ratio	11.77%	11.04%
Total risk based capital, actual, ratio	13.23%	12.57%

Note 18 - Fair Value Disclosu_3

Note 18 - Fair Value Disclosure Measurements (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Estimated Selling Costs of Impaired Loans	$ 2,100,000	$ 492,000

Note 18 - Fair Value Disclosu_4

Note 18 - Fair Value Disclosure Measurements - Assets Measured on a Recurring Basis (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Total debt securities	$ 105,733,000	$ 98,322,000
Equity securities in financial institutions	710,000	616,000
Subordinated Debt Securities [Member]
Total debt securities	4,126,000
US Government Agencies Debt Securities [Member]
Total debt securities		7,471,000
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Total debt securities	18,630,000	17,758,000
Fair Value, Recurring [Member]
Total debt securities	105,733,000	98,322,000
Equity securities in financial institutions	710,000	616,000
Total	106,443,000	98,938,000
Fair Value, Recurring [Member] | Subordinated Debt Securities [Member]
Total debt securities	4,126,000
Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member]
Assets measured on a recurring basis		7,471,000
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member]
Total debt securities	82,977,000	73,093,000
Fair Value, Recurring [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Total debt securities	18,630,000	17,758,000
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Total debt securities
Equity securities in financial institutions	710,000	616,000
Total	710,000	616,000
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Subordinated Debt Securities [Member]
Total debt securities
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | US Government Agencies Debt Securities [Member]
Assets measured on a recurring basis
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | US States and Political Subdivisions Debt Securities [Member]
Total debt securities
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Total debt securities
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Total debt securities	105,733,000	98,322,000
Equity securities in financial institutions
Total	105,733,000	98,322,000
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Subordinated Debt Securities [Member]
Total debt securities	4,126,000
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US Government Agencies Debt Securities [Member]
Assets measured on a recurring basis		7,471,000
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US States and Political Subdivisions Debt Securities [Member]
Total debt securities	82,977,000	73,093,000
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Total debt securities	18,630,000	17,758,000
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Total debt securities
Equity securities in financial institutions
Total
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Subordinated Debt Securities [Member]
Total debt securities
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | US Government Agencies Debt Securities [Member]
Assets measured on a recurring basis
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | US States and Political Subdivisions Debt Securities [Member]
Total debt securities
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Total debt securities

Note 18 - Fair Value Disclosu_5

Note 18 - Fair Value Disclosure Measurements - Assets Measured on a Nonrecurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Impaired loans	$ 13,070	$ 14,075
Fair Value, Nonrecurring [Member]
Impaired loans	5,166	1,075
Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member]
Impaired loans
Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member]
Impaired loans
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member]
Impaired loans	$ 5,166	$ 1,075

Note 18 - Fair Value Disclosu_6

Note 18 - Fair Value Disclosure Measurements - Additional Quantitative Information About Assets Measured at Fair Value on Non-recurring Basis (Details) - Fair Value, Nonrecurring [Member] - Fair Value, Inputs, Level 3 [Member] - Appraisal of Collateral [Member] $ in Thousands		Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Impaired loans, fair value estimate	[1]	$ 5,166	$ 1,075
Minimum [Member] | Measurement Input, Discount Rate [Member]
Impaired loans, discount rate	[2]	0.403	0
Impaired loans, discount rate	[2]	0.403	0
Maximum [Member] | Measurement Input, Discount Rate [Member]
Impaired loans, discount rate	[2]	0.474	1
Impaired loans, discount rate	[2]	0.474	1
Weighted Average [Member] | Measurement Input, Discount Rate [Member]
Impaired loans, discount rate	[2]	(0.418)	(0.406)
Impaired loans, discount rate	[2]	(0.418)	(0.406)
[1]	Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various level III inputs which are not identifiable, less any associated allowance.
[2]	Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses. The range and weighted average of liquidation expenses and other appraisal adjustments are presented as a percent of the appraisal.

Note 18 - Fair Value Disclosu_7

Note 18 - Fair Value Disclosure Measurements - Estimated Fair Value of the Company's Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Reported Value Measurement [Member]
Financial assets:
Cash and cash equivalents	$ 35,113	$ 107,933
Loans held for sale	1,220	597
Net loans	977,490	984,681
Bank-owned life insurance	16,511	16,080
Federal Home Loan Bank stock	3,848	3,679
Accrued interest receivable	3,471	3,633
Financial liabilities:
Deposits	1,020,843	1,016,067
Short-term borrowings	5,075	90,398
Other borrowings	12,750	8,803
Accrued interest payable	917	744
Estimate of Fair Value Measurement [Member]
Financial assets:
Cash and cash equivalents	35,113	107,933
Loans held for sale	1,220	597
Net loans	974,213	973,124
Bank-owned life insurance	16,511	16,080
Federal Home Loan Bank stock	3,848	3,679
Accrued interest receivable	3,471	3,633
Financial liabilities:
Deposits	1,023,236	1,014,044
Short-term borrowings	5,075	90,398
Other borrowings	12,783	8,827
Accrued interest payable	917	744
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Financial assets:
Cash and cash equivalents	35,113	107,933
Loans held for sale
Net loans
Bank-owned life insurance	16,511	16,080
Federal Home Loan Bank stock	3,848	3,679
Accrued interest receivable	3,471	3,633
Financial liabilities:
Deposits	652,043	715,153
Short-term borrowings	5,075	90,398
Other borrowings
Accrued interest payable	917	744
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Financial assets:
Cash and cash equivalents
Loans held for sale	1,220	597
Net loans
Bank-owned life insurance
Federal Home Loan Bank stock
Accrued interest receivable
Financial liabilities:
Deposits
Short-term borrowings
Other borrowings
Accrued interest payable
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Financial assets:
Cash and cash equivalents
Loans held for sale
Net loans	974,213	973,124
Bank-owned life insurance
Federal Home Loan Bank stock
Accrued interest receivable
Financial liabilities:
Deposits	371,193	298,891
Short-term borrowings
Other borrowings	12,783	8,827
Accrued interest payable

Note 19 - Accumulated Other C_3

Note 19 - Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Income (Loss) by Component, Net of Tax (Details) - USD ($)		Jan. 01, 2018	Dec. 31, 2019	Dec. 31, 2018
Balance		$ 119,863,000	$ 128,290,000	$ 119,863,000
Change in accounting principle, ASC 2016-01
Change in accounting principle, ASC 2018-02		187,000
Period change			1,996,000	(1,291,000)
Balance			137,775,000	128,290,000
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Balance	[1]	$ 1,091,000	(154,000)	1,091,000
Other comprehensive income (loss) before reclassification	[1]		2,149,000	(1,291,000)
Change in accounting principle, ASC 2016-01	[1],[2]			(141,000)
Change in accounting principle, ASC 2018-02	[1],[2]			187,000
Period change	[1]		1,996,000	(1,245,000)
Amount reclassified from accumulated other comprehensive income	[1]		(153,000)
Balance	[1]		$ 1,842,000	$ (154,000)
[1]	All amounts are net of tax. Amounts in parentheses indicate debits to accumulated other comprehensive income.
[2]	Reclassifications are the result of the adoption of ASUs 2016-01 and 2018-02 effective for the Company beginning January 1, 2018. The reclassifications are presented within the Consolidated Statement of Changes in Stockholders' Equity for the affected transitional periods.

Note 19 - Accumulated Other C_4

Note 19 - Accumulated Other Comprehensive Income (Loss) - Significant Amounts Reclassified Out of Each Component of Accumulated Other Comprehensive Income (Loss) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)
Investment securities gains on sale, net	$ 194	[1]
Income taxes	(41)	[1]
Net of tax	$ 153
[1]	Amounts in parentheses indicate expenses and other amounts indicate income.

Note 20 - Stock Split Disclos_3

Note 20 - Stock Split Disclosure (Details Textual)	Oct. 09, 2019
Stockholders' Equity Note, Stock Split, Conversion Ratio	2

Note 20 - Stock Split Disclos_4

Note 20 - Stock Split Disclosure - Effect of Stock Split (Details) - $ / shares	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Restated net income per common share - basic (in dollars per share)	$ 0.48	$ 0.51	$ 0.51	$ 0.46	$ 0.53	$ 0.51	$ 0.48	$ 0.41	$ 1.96	$ 1.92
Restated net income per common share - diluted (in dollars per share)	$ 0.49	$ 0.50	$ 0.50	$ 0.46	$ 0.53	$ 0.51	$ 0.48	$ 0.40	$ 1.95	$ 1.91
Restated weighted-average common shares issued (in shares)									7,286,554	7,232,238
Restated average treasury stock shares (in shares)									816,146	772,330
Restated average shares outstanding - basic (in shares)	6,423,543	6,458,258	6,502,508	6,498,278	6,478,360	6,468,786	6,451,452	6,440,524	6,470,408	6,459,908
Restated stock options and restricted stock (in shares)									32,398	27,906
Restated average shares outstanding - diluted (in shares)	6,455,387	6,479,066	6,514,946	6,510,568	6,500,298	6,496,652	6,480,658	6,476,138	6,502,806	6,487,814
Restated period ending shares oustanding (in shares)	6,423,630				6,488,664				6,423,630	6,488,664
Restated treasury shares outstanding (in shares)	871,162				772,330				871,162	772,330

Note 21 - Parent Company - Cond

Note 21 - Parent Company - Condensed Balance Sheet (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Equity Securities, FV-NI	$ 710,000	$ 616,000
Other assets	10,697,000	9,698,000
TOTAL ASSETS	1,182,475,000	1,248,398,000
Trust preferred debt	8,248,000	8,248,000
TOTAL LIABILITIES	1,044,700,000	1,120,108,000
STOCKHOLDERS' EQUITY	137,775,000	128,290,000	$ 119,863,000
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	1,182,475,000	1,248,398,000
Parent Company [Member]
Cash and due from banks	2,577,000	1,582,000
Equity Securities, FV-NI	710,000	616,000
Other assets	977,000	4,080,000
TOTAL ASSETS	146,768,000	137,008,000
Other liabilities	745,000	470,000
TOTAL LIABILITIES	8,993,000	8,718,000
STOCKHOLDERS' EQUITY	137,775,000	128,290,000
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	146,768,000	137,008,000
Parent Company [Member] | Non Bank Subsidiary [Member]
Equity method investments	1,400,000	2,364,000
Parent Company [Member] | Subsidiary Banks [Member]
Equity method investments	$ 141,104,000	$ 128,366,000

Note 21 - Parent Company - Co_2

Note 21 - Parent Company - Condensed Statement of Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Total income	$ 13,436	$ 13,885	$ 13,720	$ 13,484	$ 13,459	$ 12,829	$ 12,129	$ 11,940	$ 54,525	$ 50,357
Interest expense	3,128	3,307	3,451	3,254	2,998	2,584	2,287	2,040	13,140	9,909
Income before income tax benefit	3,775	3,930	3,976	3,622	3,985	3,897	3,578	3,133	15,303	14,593
Income tax benefit	634	661	686	611	560	593	481	528	2,592	2,162
NET INCOME	$ 3,141	$ 3,269	$ 3,290	$ 3,011	$ 3,425	$ 3,304	$ 3,097	$ 2,605	12,711	12,431
Comprehensive Income									14,707	11,140
Parent Company [Member]
Gain (loss) on equity securities									94	(9)
Other									12	9
Total income									5,556	4,650
Interest expense									343	325
Other									2,949	2,119
Total expenses									3,292	2,444
Income before income tax benefit									2,264	2,206
Income tax benefit									(669)	(513)
Income before equity in undistributed net income of subsidiaries									2,933	2,719
Equity in undistributed net income of subsidiaries									9,778	9,712
NET INCOME									12,711	12,431
Comprehensive Income									14,707	11,140
Parent Company [Member] | Subsidiary Banks [Member]
Dividends from subsidiary									4,450	4,650
Parent Company [Member] | Non Bank Subsidiary [Member]
Dividends from subsidiary									$ 1,000

Note 21 - Parent Company - Co_3

Note 21 - Parent Company - Condensed Statement of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Net income	$ 3,141	$ 3,269	$ 3,290	$ 3,011	$ 3,425	$ 3,304	$ 3,097	$ 2,605	$ 12,711	$ 12,431
Other, net									(1,867)	112
Net cash provided by operating activities									13,459	14,281
Stock options exercised									4	168
Repurchase of treasury shares									(2,229)
Cash dividends									3,685	3,779
Net cash (used in) financing activities									(86,555)	130,309
Increase (decrease) in cash									(72,820)	68,047
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR				107,933				39,886	107,933	39,886
CASH AND CASH EQUIVALENTS AT END OF YEAR	35,113				107,933				35,113	107,933
Parent Company [Member]
Net income									12,711	12,431
Equity method investments, income (loss)									(9,778)	(9,712)
Stock-based compensation									548	371
(Gain) loss on equity securities									(94)	9
Other, net									3,095	(382)
Net cash provided by operating activities									6,482	2,717
Proceeds from issuance of common stock									95	92
Restricted stock cash portion									(44)
Stock options exercised									4	168
Proceeds from dividend reinvestment plan									372	618
Repurchase of treasury shares									(2,229)
Cash dividends									(3,685)	(3,779)
Net cash (used in) financing activities									(5,487)	(2,901)
Increase (decrease) in cash									995	(184)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR				$ 1,582				$ 1,766	1,582	1,766
CASH AND CASH EQUIVALENTS AT END OF YEAR	$ 2,577				$ 1,582				2,577	1,582
Increase in common stock through increase in other, net									265	183
Parent Company [Member] | Middlefield Banking Company [Member]
Equity method investments, income (loss)									(10,742)	(9,711)
Parent Company [Member] | EMORECO [Member]
Equity method investments, income (loss)									$ 964	$ (1)

Note 22 - Selected Quarterly _3

Note 22 - Selected Quarterly Financial Data (Unaudited) - Selected Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Total income	$ 13,436	$ 13,885	$ 13,720	$ 13,484	$ 13,459	$ 12,829	$ 12,129	$ 11,940	$ 54,525	$ 50,357
Interest expense	3,128	3,307	3,451	3,254	2,998	2,584	2,287	2,040	13,140	9,909
Net interest income	10,308	10,578	10,269	10,230	10,461	10,245	9,842	9,900	41,385	40,448
Provision for loan losses	460	80	110	240	210	210	210	210
Net interest income after provision for loan losses	9,848	10,498	10,159	9,990	10,251	10,035	9,632	9,690	40,495	39,608
Total noninterest income	1,305	1,105	1,299	1,132	977	954	1,009	788	4,841	3,728
Total noninterest expense	7,378	7,673	7,482	7,500	7,243	7,092	7,063	7,345	30,033	28,743
Income before income tax benefit	3,775	3,930	3,976	3,622	3,985	3,897	3,578	3,133	15,303	14,593
Income tax benefit	634	661	686	611	560	593	481	528	2,592	2,162
Net income	$ 3,141	$ 3,269	$ 3,290	$ 3,011	$ 3,425	$ 3,304	$ 3,097	$ 2,605	$ 12,711	$ 12,431
Net income, basic (in dollars per share)	$ 0.48	$ 0.51	$ 0.51	$ 0.46	$ 0.53	$ 0.51	$ 0.48	$ 0.41	$ 1.96	$ 1.92
Net income, diluted (in dollars per share)	$ 0.49	$ 0.50	$ 0.50	$ 0.46	$ 0.53	$ 0.51	$ 0.48	$ 0.40	$ 1.95	$ 1.91
Weighted-average common shares and common stock equivalents used to calculate basic earnings per share (in shares)	6,423,543	6,458,258	6,502,508	6,498,278	6,478,360	6,468,786	6,451,452	6,440,524	6,470,408	6,459,908
Weighted-average common shares and common stock equivalents used to calculate diluted earnings per share (in shares)	6,455,387	6,479,066	6,514,946	6,510,568	6,500,298	6,496,652	6,480,658	6,476,138	6,502,806	6,487,814