Inventories, Change in Accounting Estimates and Inventory Adjustments (Details Textual) (USD $)	9 Months Ended
	Oct. 31, 2013	Oct. 31, 2012
Inventory Write-Down	$ 617,890	$ 300,000
Change In Accounting Estimate Inventory Valuation Reserves	353,000
Inventory Valuation Reserves	375,000
Inventory Adjustments Net	1,886,000
Revised Inventory Adjustments Net	810,000
Brazil [Member]
Inventory Write-Down	$ 348,000