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Business Combination, Significant Transaction and Sale of Business (Details Textual) - USD ($)
$ in Thousands
1 Months Ended
Jul. 11, 2016
Apr. 14, 2015
Oct. 31, 2016
Jul. 31, 2016
Jun. 30, 2015
Dec. 31, 2018
Dec. 31, 2017
Business Combination, Significant Transaction and Sale of Business (Textual)              
Business combination consideration paid transferred           $ 588 $ 1,050
Roshtov Software Industries Ltd [Member]              
Business Combination, Significant Transaction and Sale of Business (Textual)              
Business acquired consideration $ 20,550            
Business acquisition, remaining ownership percentage 40.00%            
Ownership interest acquired 60.00%            
Redeemable non-controlling interest $ 14,012         14,408  
Comblack IT Ltd. [Member]              
Business Combination, Significant Transaction and Sale of Business (Textual)              
Business combination consideration paid transferred   $ 1,821          
Payments upon closing of the business acquisition   1,523          
Contingent payment upon operational targets   $ 298          
Business acquisition, remaining ownership percentage   30.00%          
Ownership interest acquired   70.00%          
Redeemable non-controlling interest   $ 989          
Comblack IT Ltd. [Member] | Seller [Member]              
Business Combination, Significant Transaction and Sale of Business (Textual)              
Redeemable non-controlling interest             7,245
Infinigy Solutions LLC [Member]              
Business Combination, Significant Transaction and Sale of Business (Textual)              
Business combination consideration paid transferred         $ 6,527    
Payments upon closing of the business acquisition         5,600    
Contingent payment upon operational targets         $ 927    
Business acquisition, remaining ownership percentage         30.00%    
Ownership interest acquired         70.00%    
Redeemable non-controlling interest         $ 3,590 3,886  
Infinigy Solutions LLC [Member] | Seller [Member]              
Business Combination, Significant Transaction and Sale of Business (Textual)              
Business acquired consideration       $ 534      
Shavit Software Ltd [Member]              
Business Combination, Significant Transaction and Sale of Business (Textual)              
Business combination consideration paid transferred     $ 6,836        
Payments upon closing of the business acquisition     $ 4,699        
Ownership interest acquired     100.00%        
Business acquisition, deferred payment     $ 2,137        
Shavit Software Ltd [Member] | Seller [Member]              
Business Combination, Significant Transaction and Sale of Business (Textual)              
Business acquisition, deferred payment           $ 2,535 $ 924