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Note 11 - Business and Credit Concentrations, Major Customers and Geographic Information - Revenue Attributed to United States and All Other Countries (Details) - USD ($) | 3 Months Ended | 12 Months Ended
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Oct. 31, 2015 | Jul. 31, 2015 | Apr. 30, 2015 | Jan. 31, 2015 | Oct. 31, 2014 | Jul. 31, 2014 | Apr. 30, 2014 | Jan. 31, 2014 | Oct. 31, 2015 | Oct. 31, 2014 | Oct. 31, 2013
UNITED STATES |  |  |  |  |  |  |  |  |  |  |
Revenue, Net |  |  |  |  |  |  |  |  | $ 57,402,020 | $ 65,457,787 | $ 52,931,288
Non-US [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue, Net |  |  |  |  |  |  |  |  | 16,166,718 | 17,519,945 | 22,334,750
Revenue, Net | $ 16,752,447 | $ 20,781,340 | $ 18,676,107 | $ 17,358,844 | $ 25,247,943 | $ 21,004,130 | $ 20,190,729 | $ 16,534,930 | $ 73,568,738 | $ 82,977,732 | $ 75,266,038

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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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