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Note 7 - Segment Information (Details) - Net Sales for Geographic Areas (USD $) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Geographical | $ 19,417,234 | $ 18,524,604 | $ 58,959,307 | $ 56,735,444
UNITED STATES |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Geographical | 16,219,193 | 15,466,317 | 49,298,035 | 47,404,281
CANADA |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Geographical | 1,908,966 | 1,889,696 | 5,835,776 | 5,728,405
All Other Countries [Member] |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Geographical | $ 1,289,075 | $ 1,168,591 | $ 3,825,496 | $ 3,602,758

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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