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Manufacturing Segment Data (Details) (USD $) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 31, 2012 | Oct. 31, 2011 | Oct. 31, 2012 | Oct. 31, 2011
Domestic Sales, Value | $ 9,800,000 | $ 12,700,000 | $ 28,700,000 | $ 41,000,000
International Sales, Value | 14,400,000 | 12,000,000 | 43,000,000 | 35,200,000
Total Sales, Value | $ 24,238,573 | $ 24,744,033 | $ 71,718,608 | $ 76,162,356
Domestic Sales, Percentage | 41.00% | 51.00% | 40.00% | 53.00%
International Sales, Percentage | 59.00% | 49.00% | 60.00% | 47.00%
Total Sales, Percentage | 100.00% | 100.00% | 100.00% | 100.00%

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