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Manufacturing Segment Data (Details) (USD $) | 3 Months Ended
--- | ---
Apr. 30, 2013 | Apr. 30, 2012
Net sales | $ 21,736,990 | $ 23,980,711
Sales Revenue, Percentage | 100.00% | 100.00%
Domestic [Member] |  |
Net sales | 11,860,000 | 9,770,000
Sales Revenue, Percentage | 54.56% | 40.75%
International [Member] |  |
Net sales | $ 9,880,000 | $ 14,210,000
Sales Revenue, Percentage | 45.44% | 59.25%

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- Definition Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and 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(a)) -URI http://asc.fasb.org/extlink&oid=6880815&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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- Definition The percentage of net product revenue to total net revenue from the sale of goods as of year end. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
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