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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
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Mar. 31, 2015
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Dec. 31, 2014
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| Statement of Financial Position [Abstract] | ||
| Common stock, par value (in dollars per share) | $ 0.001us-gaap_CommonStockParOrStatedValuePerShare | $ 0.001us-gaap_CommonStockParOrStatedValuePerShare |
| Common stock, shares authorized | 100,000,000us-gaap_CommonStockSharesAuthorized | 100,000,000us-gaap_CommonStockSharesAuthorized |
| Common stock, shares outstanding | 75,672,087us-gaap_CommonStockSharesOutstanding | 75,405,410us-gaap_CommonStockSharesOutstanding |
| X | ||||||||||
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- Definition
Face amount or stated value per share of common stock. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The maximum number of common shares permitted to be issued by an entity's charter and bylaws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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