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Shareholders' Equity - Schedule of Stock Options Outstanding and Exercisable (Details) - $ / shares
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Options Outstanding 389,687 390,525 2,343,022 2,276,079
Exercise price range, Lower range $ 0.72      
Exercise price range, Upper range 30.24      
Weighted Average [1] $ 8.05 $ 20.64 $ 3.44 $ 3.78
Remaining Contractual Term (Years) 6 years 8 months 12 days      
Options Exercisable 274,132 376,084 2,194,022  
Weighted Average Exercisable [1] $ 10.79 $ 20.79 $ 3.53  
Exercise Price One [Member]        
Options Outstanding 56,786      
Exercise price range, Lower range $ 9.00      
Exercise price range, Upper range 9.00      
Weighted Average $ 9.00      
Remaining Contractual Term (Years) 7 years      
Options Exercisable 51,231      
Weighted Average Exercisable $ 9.00      
Exercise Price Two [Member]        
Options Outstanding 49,504      
Exercise price range, Lower range $ 12.48      
Exercise price range, Upper range 12.48      
Weighted Average $ 12.48      
Remaining Contractual Term (Years) 5 years 6 months      
Options Exercisable 49,504      
Weighted Average Exercisable $ 12.48      
Exercise Price Three [Member]        
Options Outstanding 98,396      
Exercise price range, Lower range $ 13.92      
Exercise price range, Upper range 17.10      
Weighted Average $ 15.01      
Remaining Contractual Term (Years) 1 year 9 months 18 days      
Options Exercisable 98,396      
Weighted Average Exercisable $ 15.01      
Exercise Price Four [Member]        
Options Outstanding 15,001      
Exercise price range, Lower range $ 22.62      
Exercise price range, Upper range 30.24      
Weighted Average $ 24.03      
Remaining Contractual Term (Years) 5 years 6 months      
Options Exercisable 15,001      
Weighted Average Exercisable $ 24.03      
Exercise Price Five [Member]        
Options Outstanding 60,000      
Exercise price range, Lower range $ 0.72      
Exercise price range, Upper range 0.72      
Weighted Average $ 0.72      
Remaining Contractual Term (Years) 9 years 7 months 6 days      
Options Exercisable 60,000      
Weighted Average Exercisable $ 0.72      
Exercise Price Six [Member]        
Options Outstanding 110,000      
Exercise price range, Lower range $ 1.16      
Exercise price range, Upper range 1.16      
Weighted Average $ 1.16      
Remaining Contractual Term (Years) 9 years 10 months 25 days      
Options Exercisable      
Weighted Average Exercisable      
[1] Represents the weighted average price.