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Note 4 - Earnings Per Share | 9 Months Ended
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Sep. 30, 2017
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 |  |  | Nine months ended |
|  | September 30, |  |  | September 30, |
|  | 2017 |  |  | 2016 |  |  | 2017 |  |  | 2016 |
Net income |  | $ | 7,853,935 |  |  | $ | 6,107,501 |  |  | $ | 25,804,917 |  |  | $ | 19,157,457 |
Basic EPS |  | $ | 0.60 |  |  | $ | 0.47 |  |  | $ | 1.96 |  |  | $ | 1.55 |
Diluted EPS |  | $ | 0.58 |  |  | $ | 0.46 |  |  | $ | 1.91 |  |  | $ | 1.52 |
Weighted average common shares outstanding* |  |  | 13,151,350 |  |  |  | 13,066,777 |  |  |  | 13,151,672 |  |  |  | 12,398,491 |
Weighted average common shares issuable upon exercise of stock options and under the employee stock purchase plan |  |  | 356,605 |  |  |  | 202,926 |  |  |  | 357,894 |  |  |  | 181,551 |
Weighted average common and common equivalent shares outstanding |  |  | 13,507,955 |  |  |  | 13,269,703 |  |  |  | 13,509,566 |  |  |  | 12,580,042 |
The increase in weighted average common shares outstanding when comparing the nine months ended September 30, 2017 to September 30, 2016 was primarily due to the common stock issuance discussed in Note 2 of the Company’s Annual Report on Form 10 -K for the year ended December 31, 2016.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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