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Net Income Per Share Net Income Per Share (Schedule of Securities Excluded from Net Income Per Share) (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Options excluded from diluted net income per share 1,000 111,000 125,000
Warrants excluded from diluted net income per share 250,000 250,000 250,000
Exercise price of excluded warrants $ 187.50 $ 187.50 $ 187.50
Minimum [Member]
      
Exercise price of excluded options $ 177.50 $ 93.00 $ 93.00
Maximum [Member]
      
Exercise price of excluded options $ 357.00 $ 357.00 $ 357.00