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Note 14 - Stockholders' Equity (Details) - Stockholders' Equity Transactions - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Note 14 - Stockholders' Equity (Details) - Stockholders' Equity Transactions [Line Items] |  |  |  |
Balance | $ 34,222,427 |  | $ 35,642,393 |
Exercise of stock options | $ 189,913 |  | $ 737,368 |
Exercise of stock options (in Shares) | 41,404 | 134,199 | 229,057 | 474,220
Repurchase and retirement of shares | $ (9,977,495) |  | $ (18,179,176) |
Stock-based compensation | 128,575 |  | 378,228 |
Income tax effect related to stock options exercised | 312,092 |  | 1,400,794 |
Net income for the period | 3,159,457 | $ 2,690,905 | 8,278,395 | $ 4,514,926
Increase to reflect the present value of Redeemable non-controlling interest | (12,199) |  | (24,349) |
Unrealized loss on foreign currency forward contracts treated as hedges | (724,336) |  | (1,723,248) |
Reclassification to net income due to settlement of foreign currency forward contracts treated as hedges | 364,330 | $ 57,701 | 1,152,359 | $ 437,893
Balance | 27,662,764 |  | 27,662,764 |
Common Stock [Member] |  |  |  |
Note 14 - Stockholders' Equity (Details) - Stockholders' Equity Transactions [Line Items] |  |  |  |
Balance | $ 14,411,616 |  | $ 14,130,059 |
Balance (in Shares) | 11,083,976 |  | 11,329,732 |
Exercise of stock options | $ 272,269 |  | $ 1,102,612 |
Exercise of stock options (in Shares) | 41,404 |  | 229,057 |
Repurchase and retirement of shares | $ (523,696) |  | $ (1,072,482) |
Repurchase and retirement of shares (in Shares) | (398,000) |  | (831,409) |
Balance | $ 14,160,189 |  | $ 14,160,189 |
Balance (in Shares) | 10,727,380 |  | 10,727,380 |
Additional Paid-in Capital [Member] |  |  |  |
Note 14 - Stockholders' Equity (Details) - Stockholders' Equity Transactions [Line Items] |  |  |  |
Balance | $ 22,492,630 |  | $ 29,090,058 |
Exercise of stock options | (82,356) |  | (365,244) |
Repurchase and retirement of shares | (9,453,799) |  | (17,106,694) |
Stock-based compensation | 128,575 |  | 378,228 |
Income tax effect related to stock options exercised | 312,092 |  | 1,400,794 |
Balance | 13,397,142 |  | 13,397,142 |
Retained Earnings [Member] |  |  |  |
Note 14 - Stockholders' Equity (Details) - Stockholders' Equity Transactions [Line Items] |  |  |  |
Balance | (1,848,495) |  | (6,955,283) |
Net income for the period | 3,159,457 |  | 8,278,395 |
Increase to reflect the present value of Redeemable non-controlling interest | (12,199) |  | (24,349) |
Balance | 1,298,763 |  | 1,298,763 |
AOCI Attributable to Parent [Member] |  |  |  |
Note 14 - Stockholders' Equity (Details) - Stockholders' Equity Transactions [Line Items] |  |  |  |
Balance | (833,324) |  | (622,441) |
Unrealized loss on foreign currency forward contracts treated as hedges | (724,336) |  | (1,723,248) |
Reclassification to net income due to settlement of foreign currency forward contracts treated as hedges | 364,330 |  | 1,152,359 |
Balance | $ (1,193,330) |  | $ (1,193,330) |

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- Definition Amount after tax, before reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6915805&loc=d3e32211-110900 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (a-c) -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669646-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e637-108580 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6915805&loc=d3e32022-110900 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6915805&loc=d3e32157-110900 + Details
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