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Note 14 - Stockholders' Equity (Tables) | 3 Months Ended
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Mar. 31, 2015
Stockholders' Equity Note [Abstract] |
Schedule of Stockholders Equity [Table Text Block] |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Accumulated |  |  |  |  |
|  |  |  |  |  |  |  |  |  | Additional |  |  |  |  |  |  | other |  |  | Total |
|  | Common stock |  |  | paid in |  |  |  |  |  |  | comprehensive |  |  | stockholders |
|  | Number |  |  | Amount |  |  | capital |  |  | Deficit |  |  | income |  |  | equity |
Balance, December 31, 2014 |  |  | 11,329,732 |  |  | $ | 14,130,059 |  |  | $ | 29,090,058 |  |  | $ | (6,955,283 | ) |  | $ | (622,441 | ) |  | $ | 35,642,393 |
Exercise of stock options |  |  | 74,997 |  |  |  | 360,949 |  |  |  | (112,966 | ) |  |  | - |  |  |  | - |  |  |  | 247,983 |
Repurchase and retirement of shares |  |  | (407,996 | ) |  |  | (516,003 | ) |  |  | (7,196,142 | ) |  |  | - |  |  |  | - |  |  |  | (7,712,145 | )
Stock-based compensation |  |  | - |  |  |  | - |  |  |  | 125,048 |  |  |  | - |  |  |  | - |  |  |  | 125,048 |
Income tax effect related to stock options exercised |  |  | - |  |  |  | - |  |  |  | 412,642 |  |  |  | - |  |  |  | - |  |  |  | 412,642 |
Net income for the period |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 2,833,943 |  |  |  | - |  |  |  | 2,833,943 |
Unrealized loss on foreign currency forward contracts treated as hedges |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | (960,866 | ) |  |  | (960,866 | )
Reclassification to net income due to settlement of foreign currency forward contracts treated as hedges |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 416,074 |  |  |  | 416,074 |
Balance, March 31, 2015 |  |  | 10,996,733 |  |  | $ | 13,975,005 |  |  | $ | 22,318,640 |  |  | $ | (4,121,340 | ) |  | $ | (1,167,233 | ) |  | $ | 31,005,072 |

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- Definition Tabular disclosure of changes in the separate accounts comprising stockholders' equity (in addition to retained earnings) and of the changes in the number of shares of equity securities during at least the most recent annual fiscal period and any subsequent interim period presented is required to make the financial statements sufficiently informative if both financial position and results of operations are presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 + Details
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