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Net Income Per Share Net Income Per Share (Schedule of Securities Excluded from Net Income Per Share) (Details) - $ / shares
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Options excluded from diluted net income per share 75,000 200 75,000 200
Warrants excluded from diluted net income per share   250,000   250,000
Exercise price of excluded options $ 5.62   $ 5.62  
Exercise price of excluded warrants   $ 187.50   $ 187.50
Minimum [Member]        
Exercise price of excluded options   283.25   283.25
Maximum [Member]        
Exercise price of excluded options   $ 357.00   $ 357.00