|
Private Placements and Public Offering (Details 2) (USD $)
|
1 Months Ended | 12 Months Ended | 54 Months Ended | 1 Months Ended | 12 Months Ended | 12 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Jun. 30, 2011
|
Mar. 31, 2011
|
Jul. 31, 2012
|
Jul. 31, 2011
|
Jul. 31, 2012
|
Mar. 28, 2012
|
Jun. 24, 2011
|
Mar. 31, 2012
Warrants
|
Jul. 31, 2012
Warrants
|
Jul. 31, 2011
Warrants
|
Mar. 28, 2012
Warrants
|
Jul. 31, 2012
Warrants issued with March 2011 Private Placement
|
|
| Derivative Liabilities | ||||||||||||
| Estimated fair value of derivative liabilities | $ 657,604 | $ 3,808,590 | ||||||||||
| Total proceeds of private placement | 3,000,000 | 1,092,000 | 3,000,000 | |||||||||
| Fair value of derivative liabilities in excess of proceeds | (808,590) | (808,590) | 808,590 | |||||||||
| Adjustments to fair value of derivative liabilities | $ 4,192,781 | $ (1,041,795) | $ 3,150,986 | $ 4,192,781 | $ (1,041,795) | |||||||
| Derivative liabilities valuation assumptions using Monte Carlo valuation model | ||||||||||||
| Closing price per share of common stock (in dollars per share) | $ 0.25 | $ 0.75 | $ 0.93 | $ 0.22 | ||||||||
| Exercise price per share (in dollars per share) | $ 1.20 | $ 0.50 | ||||||||||
| Expected volatility (as a percent) | 125.00% | 91.60% | ||||||||||
| Risk-free interest rate (as a percent) | 1.05% | 1.35% | ||||||||||
| Floor price (in dollars per share) | $ 0.50 | $ 0.50 | ||||||||||
| Remaining expected term of underlying securities | 4 years 2 months 26 days | 4 years 10 months 24 days | ||||||||||