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Note 5 - Earnings Per Share | 3 Months Ended
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Mar. 31, 2016
Earnings Per Share [Abstract] |
Earnings Per Share [Text Block] | NOTE 5 - EARNINGS PER SHARE The following information was used in the computation of EPS on a basic and diluted basis:
|  | Three months ended March 31, |
|  | 2016 |  |  | 2015 |
Net income |  | $ | 6,373,489 |  |  | $ | 4,177,889 |
Basic earnings per common share |  | $ | 0.54 |  |  | $ | 0.52 |
Diluted earnings per common share |  | $ | 0.53 |  |  | $ | 0.52 |
Weighted average common shares outstanding |  |  | 11,793,620 |  |  |  | 7,975,910 |
Weighted average common shares issuable upon exercise of stock options and under the employee stock purchase plan |  |  | 160,329 |  |  |  | 121,534 |
Weighted average common and common equivalent shares outstanding |  |  | 11,953,949 |  |  |  | 8,097,444 |

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