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Note 9 - Stock Split Disclosure | 6 Months Ended
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Jun. 30, 2020
Notes to Financial Statements |
Stock Split Disclosure [Text Block] | NO TE 9 – STOCK SPLIT DISCLOSURE On October 9, 2019, the Board of Directors of Middlefield Banc Corp. authorized a two-for-one stock split. Each shareholder of record at the close of business on October 25, 2019, received one additional share for every outstanding share held on the record date. The additional shares were paid on November 8, 2019. As a result, all share and earnings per share information have been retroactively adjusted to reflect the stock split. With respect to the June 30, 2020 and 2019 financial statements, the effect of the stock split on June 30, 2019 amounts was recognized retroactively in the stockholders’ equity accounts in the Consolidated Balance Sheets, and in all share data in the Consolidated Financial Statements and Management’s Discussion and Analysis of Financial Condition and Results of Operations. The effect of the stock split on per share amounts and weighted average common shares outstanding for the three and six months ended June 30, 2019 is as follows:
|  | For the three months ended |  |  | For the six months ended |
|  | June 30, 2019 |  |  | June 30, 2019 |
Restated net income per common share - basic |  | $ | 0.51 |  |  | $ | 0.97 |
Restated net income per common share - diluted |  | $ | 0.50 |  |  | $ | 0.97 |
Restated weighted-average common shares issued |  |  | 7,286,542 |  |  |  | 7,278,620 |
Restated average treasury stock shares |  |  | 784,034 |  |  |  | 778,214 |
Restated average shares outstanding - basic |  |  | 6,502,508 |  |  |  | 6,500,406 |
Restated stock options and restricted stock |  |  | 12,438 |  |  |  | 12,644 |
Restated average shares outstanding - diluted |  |  | 6,514,946 |  |  |  | 6,513,050 |
Restated period ending shares outstanding |  |  | 6,485,170 |  |  |  | 6,485,170 |
Restated treasury shares outstanding |  |  | 807,824 |  |  |  | 807,824 |

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