Schedule of Share-based Payment Award, Warrant Liability, Valuation Assumptions (Details)	9 Months Ended
	Oct. 31, 2012 Y
Fair Value Of Financial Instruments Schedule Of Share-based Payment Award, Warrant Liability, Valuation Assumptions 1	135.00%
Fair Value Of Financial Instruments Schedule Of Share-based Payment Award, Warrant Liability, Valuation Assumptions 2	0.00%
Fair Value Of Financial Instruments Schedule Of Share-based Payment Award, Warrant Liability, Valuation Assumptions 3	3.83
Fair Value Of Financial Instruments Schedule Of Share-based Payment Award, Warrant Liability, Valuation Assumptions 4	0.49%
Fair Value Of Financial Instruments Schedule Of Share-based Payment Award, Warrant Liability, Valuation Assumptions 5	127.60%
Fair Value Of Financial Instruments Schedule Of Share-based Payment Award, Warrant Liability, Valuation Assumptions 6	0.00%
Fair Value Of Financial Instruments Schedule Of Share-based Payment Award, Warrant Liability, Valuation Assumptions 7	4.59
Fair Value Of Financial Instruments Schedule Of Share-based Payment Award, Warrant Liability, Valuation Assumptions 8	0.71%