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Weighted Average Common Shares | 12 Months Ended
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Dec. 31, 2012
Weighted Average Common Shares [Abstract] |
Weighted Average Common Shares | 11. Weighted Average Common Shares
|  | At December 31,
|  | 2012 |  | 2011
Basic common shares |  | 74,351,065 |  | 68,457,885
Effect of dilutive stock-based awards |  | - |  | 637,081
Effect of dilutive warrants |  | - |  | 200,981
Diluted common shares |  | 74,351,065 |  | 69,295,947
Stock option s to purchase 3,102,500 and 1,81 0,000 Common Shares and warrants to purchase 19,977,743 and 15,219,802 Common Shares were outstanding at December 31, 2012 and 2011, respectively, but were not included in the computation of diluted weighted average Common Shares outstanding because their effect would have been anti-dilutive.

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations. + References No definition available. + Details
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