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Note 4 - Earnings Per Share | 6 Months Ended
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Jun. 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 |  |  | Six months ended |
|  | June 30, |  |  | June 30, |
|  | 2017 |  |  | 2016 |  |  | 2017 |  |  | 2016 |
Net income |  | $ | 8,766,017 |  |  | $ | 6,676,467 |  |  | $ | 17,950,982 |  |  | $ | 13,049,956 |
Basic EPS |  | $ | 0.67 |  |  | $ | 0.54 |  |  | $ | 1.36 |  |  | $ | 1.08 |
Diluted EPS |  | $ | 0.65 |  |  | $ | 0.53 |  |  | $ | 1.33 |  |  | $ | 1.07 |
Weighted average common shares outstanding |  |  | 13,170,283 |  |  |  | 12,335,077 |  |  |  | 13,151,833 |  |  |  | 12,064,349 |
Weighted average common shares issuable upon exercise of stock options and under the employee stock purchase plan |  |  | 346,309 |  |  |  | 181,397 |  |  |  | 350,672 |  |  |  | 170,863 |
Weighted average common and common equivalent shares outstanding |  |  | 13,516,592 |  |  |  | 12,516,474 |  |  |  | 13,502,505 |  |  |  | 12,235,212 |
The increase in weighted average common shares outstanding from June 30, 2016 to June 30, 2017 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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