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Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
|
Mar. 31, 2015
|
Dec. 31, 2014
|
|---|---|---|
| Statement of Financial Position [Abstract] | ||
| Common stock par value (in usd per share) | $ 0.001 | $ 0.001 |
| Common stock shares authorized | 300,000,000 | 300,000,000 |
| Common stock shares issued | 94,188,225 | 93,944,742 |
| Common stock shares outstanding | 94,143,451 | 93,899,968 |
| Preferred stock par value (in usd per share) | $ 0.001 | $ 0.001 |
| Preferred stock shares authorized | 10,000,000 | 10,000,000 |
| Preferred stock, shares issued | 0 | 0 |
| Preferred stock, shares outstanding | 0 | 0 |