|
Shareholders' Equity (Common Stock Transactions) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified |
6 Months Ended | |
|---|---|---|
|
Feb. 28, 2014
|
Aug. 31, 2013
|
|
| Classes of stock | ||
| Preferred stock, shares authorized | 10,000,000 | 10,000,000 |
| Preferred stock, par value | $ 0.01 | $ 0.01 |
| Preferred stock, shares issued | 0 | 0 |
| Preferred stock, shares outstanding | 0 | 0 |
| Common stock, shares authorized | 100,000,000 | 100,000,000 |
| Common stock, par value | $ 0.001 | $ 0.001 |
| Common stock, shares issued | 76,685,709 | 70,587,723 |
| Common stock, shares outstanding | 76,685,709 | 70,587,723 |
| Common stock issued for acquisition of mineral interests | ||
| 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 | $ 10,122 |