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Income Taxes (Narrative) (Details) - USD ($)
12 Months Ended
Jan. 31, 2018
Jan. 01, 2018
Jan. 01, 2017
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Operating Loss Carryforwards       $ 94,147      
Corporate tax rate   23.00%   23.00% 23.00% 24.00% 25.00%
Federal Statutory Income Tax Rate     7.50%       9.00%
Federal Statutory Income Tax Rate, Preferred Enterprises Located in Other Than Development Area, Percent     16.00%        
Federal Statutory Income Tax Rate, Preferred Technological Enterprise Income, Percent             12.00%
Income tax rate for US federal corporate tax according to the Tax Cuts and Jobs Act       21 35    
Percentage of net operating loss deduction to taxable income 80.00%            
Maximum              
Tax benefit period, commencement       12 years      
Tax benefit period, approval       14 years      
Israel              
Corporate tax rate       23.00% 23.00%    
Israel | Minimum              
Open tax year       2014      
Israel | Maximum              
Open tax year       2018      
US              
Tax exempted period       2 years      
US | Minimum              
Reduced corporate tax rate company will be liable in years three to eight, based on the percentage of foreign ownership       10.00%      
Open tax year       2016      
US | Maximum              
Reduced corporate tax rate company will be liable in years three to eight, based on the percentage of foreign ownership       25.00%      
Open tax year       2018      
US | Income tax according to statutory tax rules outside of Israel              
Operating Loss Carryforwards       $ 10,313