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Stockholders' Equity
12 Months Ended
Dec. 31, 2012
Stockholders' Equity  
Stockholders' Equity

10. Stockholders' Equity

        The Company's Board of Directors may issue an additional series of optional preferred stock and designate the relative rights and preferences of the optional preferred stock when and if issued. Such rights and preferences can include liquidation preferences, redemption rights, voting rights and dividends and shares can be issued in multiple series with different rights and preferences. The Company has no current plans for the issuance of an additional series of optional preferred stock.