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Note 11 - Business and Credit Concentrations, Major Customers and Geographic Information (Details Textual) | 3 Months Ended | 12 Months Ended
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Oct. 31, 2015 USD ($) | Jul. 31, 2015 USD ($) | Apr. 30, 2015 USD ($) | Jan. 31, 2015 USD ($) | Oct. 31, 2014 USD ($) | Jul. 31, 2014 USD ($) | Apr. 30, 2014 USD ($) | Jan. 31, 2014 USD ($) | Oct. 31, 2015 USD ($) | Oct. 31, 2014 USD ($) | Oct. 31, 2013 USD ($)
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | Customer One [Member] |  |  |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  |  |  |  |  | 13.60% | 16.80% |
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | Customer Two [Member] |  |  |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  |  |  |  |  | 10.80% |  |
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] |  |  |  |  |  |  |  |  |  |  |
Concentration Risk, Number of Customers |  |  |  |  |  |  |  |  | 2 | 1 |
Geographic Concentration Risk [Member] | Sales Revenue, Net [Member] | UNITED STATES |  |  |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  |  |  |  |  | 78.00% | 79.00% | 70.00%
Geographic Concentration Risk [Member] | Sales Revenue, Net [Member] | Non-US [Member] |  |  |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  |  |  |  |  | 22.00% | 21.00% | 30.00%
Customer One [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue, Net |  |  |  |  |  |  |  |  | $ 10,000,000 | $ 14,000,000 |
Customer Two [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue, Net |  |  |  |  |  |  |  |  | 8,000,000 |  |
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
Centric Solutions Limited Liability Company [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue, Net |  |  |  |  |  |  |  |  | 1,500,000 | 1,400,000 | 1,500,000
Operating Income (Loss) |  |  |  |  |  |  |  |  | (175,000) | (256,000) | (124,000)
Assets | $ 181,000 |  |  |  | $ 220,000 |  |  |  | $ 181,000 | 220,000 |
Number of Reportable Segments |  |  |  |  |  |  |  |  | 1 |  |
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
Concentration Risk, Number of Customers |  |  |  |  |  |  |  |  |  | 1 |
Entity-Wide Payable, Major Customer Percentage |  |  |  |  |  |  |  |  |  | 13.90% |
Operating Income (Loss) |  |  |  |  |  |  |  |  | (2,381,798) | $ 1,332,295 | $ 767,121
Assets | $ 45,028,818 |  |  |  | $ 50,038,614 |  |  |  | $ 45,028,818 | $ 50,038,614 |

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