Note 5 - Customer and Supplier Concentrations (Detail) (USD $)	3 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Fair Value, Concentration of Risk, Total Product Costs	$ 400,000	$ 654,000
Cost of Revenue	1,120,000	1,869,000
Cost of Goods, Total [Member]
Cost of Revenue	$ 1,000,000	$ 1,500,000