|
Consolidated Balance Sheets (Parenthetical) (USD $)
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Apr. 30, 2013
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Jul. 31, 2012
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Apr. 30, 2012
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Jul. 31, 2011
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Jun. 24, 2011
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Mar. 02, 2011
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Feb. 28, 2011
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|---|---|---|---|---|---|---|---|
| Consolidated Balance Sheets | |||||||
| Common stock, authorized shares | 3,200,000,000 | 3,200,000,000 | 3,200,000,000 | 3,200,000,000 | 100,000,000 | ||
| Common stock, par value (in dollars per share) | $ 0.0001 | $ 0.0001 | $ 0.0001 | $ 0.0001 | $ 0.0001 | $ 0.001 | |
| Common stock, issued shares | 117,859,000 | 87,856,000 | 56,856,000 | ||||
| Common stock, outstanding shares | 117,859,000 | 87,856,000 | 56,856,000 | 68,480,000 | 2,140,000 | ||
| Warrants issued | 57,783,000 | 42,246,000 | 13,696,000 | ||||
| Warrants outstanding | 57,783,000 | 42,246,000 | 42,246,000 | 13,696,000 |