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Note 16 - Geographical Sales (Tables) | 3 Months Ended
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Mar. 31, 2016
Segment Reporting [Abstract] |
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block] | Geographical distribution of sales consisted of the following for the three months ended March 31, 2016 and 2015:
Geographical Areas |  | March 31, 2016 |  |  | March 31, 2015 |
China* |  | $ | 4,615,080 |  |  | $ | 3,766,315 |
North America |  |  | 17,223,375 |  |  |  | 15,118,508 |
Asia** |  |  | 452,780 |  |  |  | 668,210 |
Europe |  |  | 3,898,885 |  |  |  | 2,421,143 |
Australia |  |  | 774,155 |  |  |  | 26,758 |
Hong Kong |  |  | 19,683 |  |  |  | 5,675 |
Other countries |  |  | 100,129 |  |  |  | 25,869 |
|  | $ | 27,084,087 |  |  | $ | 22,032,478 |
* excluding Hong Kong
** excluding China

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- Definition Tabular disclosure of the names of foreign countries from which revenue is material and the amount of revenue from external customers attributed to those countries. An entity may also provide subtotals of geographic information about groups of countries. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e9038-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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