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Shareholders' Equity (Tables)
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6 Months Ended |
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Feb. 28, 2014
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| Shareholders' Equity [Abstract] |
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| Schedule of Classes of Stock |
| | | As of February 28, | | | As August 31, | | | | | 2014 | | | 2013 | | | Preferred stock, shares authorized | | | 10,000,000 | | | | 10,000,000 | | | Preferred stock, par value | | $ | 0.01 | | | $ | 0.01 | | | Preferred stock, shares issued and outstanding | | nil | | | nil | | | Common stock, shares authorized | | | 100,000,000 | | | | 100,000,000 | | | Common stock, par value | | $ | 0.001 | | | $ | 0.001 | | | Common stock, shares issued and outstanding | | | 76,685,709 | | | | 70,587,723 | | |
| Schedule of Common Stock Issued For Acquisition of Mineral Interests and Services |
| | | For the Six Months Ended February 28, 2014 | | | Number of common shares issued for mineral property leases | | | 243,179 | | | Number of common shares issued for acquisitions | | | 851,857 | | | Total common shares issued | | | 1,095,036 | | | | | | | | | Average price per common share | | $ | 9.24 | | | Aggregate value of shares issued (in thousands) | | $ | 10,122 | |
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| Schedule of Issued and Outstanding Common Stock Warrants |
| Exercise Price | Description | | Number of Shares | | Remaining Contractual Life (in years) | | Exercise Price times Number of Shares (in thousands) | | | | $6.00 | | Series C | | | 3,664,739 | | | | 0.8 | | | | $21,988 | | |
| Schedule of Outstanding Common Stock Warrant Activity |
| | | Number of Warrants | | | Weighted Average Exercise Price | | | Outstanding, August 31, 2013 | | | 8,666,802 | | | $ | 5.92 | | | Granted | | | - | | | $ | - | | | Exercised | | | (5,002,063 | ) | | $ | 5.86 | | | Expired | | | - | | | $ | - | | | Outstanding, February 28, 2014 | | | 3,664,739 | | | $ | 6.00 | |
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