Convertible Notes - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended				6 Months Ended	12 Months Ended	6 Months Ended	12 Months Ended		1 Months Ended	6 Months Ended			1 Months Ended	6 Months Ended			1 Months Ended	3 Months Ended		6 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012	Jul. 31, 2011	Jan. 31, 2012	Oct. 16, 2009	Jul. 31, 2012 Derivative liability	Jan. 31, 2012 Derivative liability	Jul. 31, 2012 Warrant	Jan. 31, 2012 Warrant	Jan. 31, 2010 Warrant	Oct. 16, 2009 10% Senior Subordinated Convertible Notes due January 31, 2013	Jul. 31, 2012 10% Senior Subordinated Convertible Notes due January 31, 2013	Jan. 31, 2012 10% Senior Subordinated Convertible Notes due January 31, 2013	Jul. 31, 2011 10% Senior Subordinated Convertible Notes due January 31, 2013	Oct. 16, 2009 10% Senior Subordinated Convertible Notes due January 31, 2013 Placement Agent	Jul. 31, 2012 10% Senior Subordinated Convertible Notes due January 31, 2013 Placement Agent	Oct. 16, 2009 10% Senior Subordinated Convertible Notes due January 31, 2013 Subordinated Units	Oct. 16, 2009 10% Senior Subordinated Convertible Notes due January 31, 2013 Warrant	Sep. 01, 2011 8% Senior Subordinated Convertible Notes due February 1, 2015	Jul. 31, 2012 8% Senior Subordinated Convertible Notes due February 1, 2015	Jul. 31, 2011 8% Senior Subordinated Convertible Notes due February 1, 2015	Jul. 31, 2012 8% Senior Subordinated Convertible Notes due February 1, 2015	Jan. 31, 2012 8% Senior Subordinated Convertible Notes due February 1, 2015	Jul. 31, 2011 8% Senior Subordinated Convertible Notes due February 1, 2015
Debt Instrument [Line Items]
Convertible notes	$ 1,073,282		$ 1,073,282		$ 746,366							$ 1,250,000	$ 923,282	$ 596,366						$ 150,000	$ 150,000		$ 150,000	$ 150,000
Proceeds from issuance of convertible notes payable												1,100,000
Convertible notes, interest rate												10.00%	10.00%	10.00%						8.00%	8.00%		8.00%	8.00%
Convertible notes payable, interest payment terms												The notes bear interest at a rate of 10% annually, payable semi annually on January 31 and July 31.								The notes bear interest at a rate of 8% annually, payable semi annually on December 31 and June 30.
Convertible notes, maturity date												Jan. 31, 2013	Jan. 31, 2013	Jan. 31, 2013						Feb. 01, 2015			Feb. 01, 2015	Feb. 01, 2015
Debt, face amount													1,250,000					25,000	25,000
Common shares which could be purchased upon exercise of warrants																250,000			25,000
Warrant term period	5 years		5 years													5 years			5 years
Gross proceeds from issuance of convertible notes payable												1,250,000
Placement of subordinate debt, commission paid												125,000
Placement of subordinate debt, other direct expenses												25,000
Warrant exercise price	0.125		0.125		0.11485	0.11485										0.25
Restricted shares granted to agent																100,000
Prepaid financing cost, amortization period																40 months
Financing cost	19,685	9,375	40,895	18,750						120,000		25,000				4,000
Number of common shares issuable up on conversion of note per $25,000 principal amount															200,000					100,000
Debt conversion, price per share of common stock													$ 0.125		$ 0.125					$ 0.25
Debt conversion, percentage of stock price													110.00%
Minimum conversion price per share													5.00%
Minimum conversion price per cash EPS multiplier													$ 8
Debt redemption notice period															60 days
Convertible debt, redemption price as a percentage of principal amount															102.00%						108.00%		108.00%
Earliest redemption date convertible debt															Jan. 31, 2012								Jun. 30, 2014
Derivative liability, debt discount								653,026
Reset of Change in conversion price								$ 0.11485
Black-Scholes option-pricing model assumptions, expected Life							1 year		5 years	2 years 9 months							5 years
Black-Scholes option-pricing model assumptions, stock price volatility							80.00%		80.00%	30.00%							48.00%
Black-Scholes option-pricing model assumptions, risk-free interest rate							0.30%		2.16%	0.30%							2.16%
Warrant expiration date	Oct. 31, 2014		Oct. 31, 2014			Oct. 31, 2014
Fair value of warrants									2,653		2,418						2,200
Warrants issued to purchase common stock																	250,000
Warrants issued to purchase common stock, exercise price per share																	$ 0.25
Warrant expiration period after issuance date																	5 years
Warrant liability	454,585		454,585		120,000
Debt conversion description																							The Company may require the holders of the 8% Notes to convert to common stock at the then applicable conversion rate at any time after June 30, 2013 if i) our 10% Notes have been fully repaid or converted and ii) the closing price of our common stock has exceeded 150% of the then applicable Conversion Price for no less than 30 consecutive trading days prior to giving notice.
Interest expense	205,221	31,603	408,047	63,177																	34,250	31,603	68,500		63,177
Amortization expense of debt discount																					$ 163,458	$ 0	$ 326,916		$ 0