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Note 6 - Segment Information (Details) - Net Sales for Geographic Areas (USD $) | 3 Months Ended
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Mar. 31, 2014 | Mar. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Geographic locations | $ 19,838,466 | $ 19,237,827
UNITED STATES |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Geographic locations | 16,645,886 | 16,196,394
CANADA |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Geographic locations | 1,913,512 | 1,919,723
All Other Countries [Member] |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Geographic locations | $ 1,279,068 | $ 1,121,710

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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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