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Note 12 - Net Sales for Geographic Areas (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
UNITED STATES |  |  |
Net sales | $ 72,061,009 | $ 69,791,099 | $ 65,371,652
CANADA |  |  |
Net sales | 7,543,468 | 8,342,896 | 8,004,320
All Other Countries [Member] |  |  |
Net sales | 4,556,723 | 5,296,917 | 4,908,613
Net sales | $ 84,161,200 | $ 83,430,912 | $ 78,284,585

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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 + Details
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- Details
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