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Interest Expense Associated with Notes Payable (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2013	Jul. 31, 2012
Associated of Interest Expense [Line Items]
Interest expense	$ 170,806	$ 224,906	$ 298,299	$ 448,942
Notes Payable
Associated of Interest Expense [Line Items]
Interest expense	10,675	7,513	20,091	12,631
Amortization of loan fees	27,055	10,310	39,589	22,145
Interest expense, debt	$ 37,730	$ 17,823	$ 59,680	$ 34,776

The net increase(decrease) in interest income during the period representing the allocation of deferred loan origination fees less deferred loan origination costs using the effective interest method over the term of the debt arrangement to which they pertain taking into account the effect of prepayments.

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