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Note 4 - Earnings Per Share | 3 Months Ended
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Mar. 31, 2018
Notes to Financial Statements |
Earnings Per Share [Text Block] | NOTE 4 - EARNINGS PER SHARE The following information was used in the computation of EPS on a basic and diluted basis:
|  | Three months ended |
|  | March 31, |
|  | 2018 |  |  | 2017 |
Net income |  | $ | 10,549,961 |  |  | $ | 9,184,965 |
Basic EPS |  | $ | 0.76 |  |  | $ | 0.70 |
Diluted EPS |  | $ | 0.74 |  |  | $ | 0.68 |
Weighted average common shares outstanding |  |  | 13,888,661 |  |  |  | 13,133,382 |
Weighted average common shares issuable upon exercise of stock options and under the employee stock purchase plan |  |  | 316,923 |  |  |  | 355,035 |
Weighted average common and common equivalent shares outstanding |  |  | 14,205,584 |  |  |  | 13,488,417 |
The increase in weighted average common shares outstanding when comparing the three months ended March 31, 2018 to March 31, 2017 was primarily due to the common stock issuance discussed in Note 2 to the Consolidated Financial Statements included in the Company’s Annual Report on Form 10 -K for the year ended December 31, 2017.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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