Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Equity (Narrative) (Details)

v3.8.0.1
Equity (Narrative) (Details)
$ / shares in Units, € in Thousands, $ in Thousands
1 Months Ended 12 Months Ended
Aug. 31, 2015
USD ($)
shares
Aug. 31, 2015
EUR (€)
shares
Mar. 18, 2015
Aug. 31, 2013
$ / shares
shares
Dec. 31, 2017
USD ($)
shares
Dec. 31, 2016
shares
Dec. 31, 2015
shares
Dec. 31, 2017
EUR (€)
shares
May 31, 2017
EUR (€)
Jun. 30, 2015
shares
May 31, 2015
EUR (€)
Disclosure of classes of share capital [line items]                      
Number of ordinary shares exercise of employee share options         3,000 3,000 3,000        
Maximum dividend paid     33.00%   0.00% 0.00%          
Ordinary Shares [Member]                      
Disclosure of classes of share capital [line items]                      
Treasury shares         258,046 256,184 254,666 258,046      
Warrant issued to purchase ordinary shares                   15,335  
Fair value of exercise of employee share options | $ $ 1,201                    
Number of ordinary shares exercise of employee share options 140,193 140,193                  
Repurchase of ordinary shares         172,391     172,391      
Amount of ordinary shares repurchased | $         $ 1,477            
Ordinary Shares [Member] | Euro [Member]                      
Disclosure of classes of share capital [line items]                      
Fair value of exercise of employee share options | €   € 1,070                  
Amount of ordinary shares repurchased | €               € 1,332      
Ordinary Shares [Member] | Mr. Zohar Zisapel [Member]                      
Disclosure of classes of share capital [line items]                      
Warrant issued to purchase ordinary shares       308,427              
Exercise price of warrant | $ / shares       $ 7.97              
Exercise warrant period       12 month              
Proportion of ownership interest       4.99%              
Ordinary Shares [Member] | Director [Member]                      
Disclosure of classes of share capital [line items]                      
Amount of ordinary shares repurchased | €                     € 3,000
Ordinary Shares [Member] | Director [Member] | Euro [Member]                      
Disclosure of classes of share capital [line items]                      
Amount of ordinary shares repurchased | €                 € 2,700