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Interest Expense Associated with Notes Payable (Detail) (USD $)	3 Months Ended								12 Months Ended
	Jan. 31, 2014	Oct. 31, 2013	Jul. 31, 2013	Apr. 30, 2013	Jan. 31, 2013	Oct. 31, 2012	Jul. 31, 2012	Apr. 30, 2012	Jan. 31, 2014	Jan. 31, 2013
Associated of Interest Expense [Line Items]
Interest expense	$ 202,206	$ 178,679	$ 170,806	$ 127,493	$ 259,995	$ 221,239	$ 224,906	$ 224,036	$ 679,184	$ 930,176
Amortization of loan fees									161,091	83,331
Interest expense, debt									$ 229,725	$ 111,290

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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