Interest Expense on Convertible Notes (Detail) (USD $)	3 Months Ended		9 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013	Oct. 31, 2012
Schedule Of Debt Instrument Interest Expense [Line Items]
Amortization of debt discount			$ 125,883	$ 490,374
Convertible Notes Payable
Schedule Of Debt Instrument Interest Expense [Line Items]
Interest expense	59,030	34,250	170,830	102,750
Amortization of loan fees	17,711	9,375	73,752	28,125
Amortization of debt discount	35,390	163,458	106,167	490,374
Interest expense, debt	$ 112,131	$ 207,083	$ 350,749	$ 621,249