Interest Expense Associated with Notes Payable (Detail) (USD $)	3 Months Ended		9 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013	Oct. 31, 2012
Associated of Interest Expense [Line Items]
Interest expense	$ 178,679	$ 221,239	$ 476,978	$ 670,181
Notes Payable
Associated of Interest Expense [Line Items]
Interest expense	16,810	2,755	36,901	15,386
Amortization of loan fees and discount	49,738	11,401	89,327	33,546
Interest expense, debt	$ 66,548	$ 14,156	$ 126,229	$ 48,932