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Stockholders' Equity (Details 2) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended 209 Months Ended 0 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Aug. 02, 2010
Preferred stock
Director
Dec. 31, 2013
Preferred stock
Director
Conversion_rate
Quarter
Dec. 31, 2013
Preferred stock
Minimum
Series
Stockholders' equity              
Preferred stock, shares issued 335,273 335,273 1,213,142     335,273  
Preferred stock, shares outstanding 335,273 335,273 1,213,142     335,273  
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001 $ 0.001     $ 10.00  
Dividend rate (as a percent) 6.00%         6.00%  
Liquidation preference (in dollars per share)           $ 10  
Number of shares to be issued for each preferred stock upon conversion           0.06079  
Conversion price (in dollars per share)           $ 164.50  
Shares reserved for future issuance upon conversion           20,381  
Number of series of Preferred Stock             1
Closing price of stock (in dollars per share)             $ 246.75
Percentage of the closing sales price of the entity's common stock that the conversion price must exceed in order for the preferred stock to be convertible           150.00%  
Number of trading days within 30 trading days in which the closing price of the entity's common stock must exceed the conversion price for the preferred stock to be convertible             20 days
Number of trading days during which the closing price of the entity's common stock must exceed the conversion price for at least 20 days in order for the preferred stock to be convertible           30 days  
Number of trading days prior to notice of automatic conversion           5 days  
Number of quarters in which no preferred stock dividends have been paid           6  
Number of Board of Directors to be elected by Preferred Stock holders if entity fails to pay dividends on Preferred Stock           2  
Number of Board of Directors elected by the Preferred Stock holders when the entity failed to pay dividends on Preferred Stock         2    
Interest rate (as a percent)           6.00%  
Debt principal amount per share, basis for exchange (in dollars per share)           $ 10  
Debt instrument, term           25 years  
Number of shares of Preferred Stock exchanged for common stock     0 0      
Deemed dividends recorded $ 9,027 $ 12,542