Convertible Notes (Parenthetical) (Detail) (USD $)	1 Months Ended		9 Months Ended	12 Months Ended	1 Months Ended	9 Months Ended	12 Months Ended
	Oct. 29, 2012 10% Senior Subordinated Convertible Notes due January 31, 2016	Oct. 16, 2009 10% Senior Subordinated Convertible Notes due January 31, 2016	Oct. 31, 2012 10% Senior Subordinated Convertible Notes due January 31, 2016	Jan. 31, 2012 10% Senior Subordinated Convertible Notes due January 31, 2016	Sep. 01, 2011 8% Senior Subordinated Convertible Notes due February 1, 2015	Oct. 31, 2012 8% Senior Subordinated Convertible Notes due February 1, 2015	Jan. 31, 2012 8% Senior Subordinated Convertible Notes due February 1, 2015
Debt Instrument [Line Items]
Convertible notes, interest rate	10.00%	10.00%	10.00%	10.00%	8.00%	8.00%	8.00%
Convertible notes, debt discount			$ 363,712	$ 653,026
Convertible notes, maturity date	Jan. 31, 2016	Jan. 31, 2013	Jan. 31, 2016	Jan. 31, 2016	Feb. 01, 2015	Feb. 01, 2015	Feb. 01, 2015