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Stockholders' Equity, Broker Dealer Warrants (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2011
Broker Dealer Warrants [Abstract]    
Exercise price for warrant (in dollars per share)   $ 10.50
Number of shares of common stock that can be purchased per warrant (in shares) 1  
Exercise period for warrant from date of issuance 3 years  
Number of warrants earned at close of private placement (in shares)   451,235
Exercise price of warrant, adjusted for stock dividends, minimum (in dollars per share) $ 9.52  
Exercise price of warrant, adjusted for stock dividends, maximum (in dollars per share) $ 10.50  
Weighted average exercise price of warrant, adjusted for stock dividends (in dollars per share) $ 9.63