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Fair Value Measurements (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Assets:    
Corporate bonds $ 5,488 $ 8,757
Convertible bonds 1,112 1,156
Total financial assets 6,600 9,913
Liabilities:    
Contingent consideration 5,964 414
Total financials liabilities 5,964 414
Level 1 [Member]    
Assets:    
Corporate bonds
Convertible bonds
Total financial assets
Liabilities:    
Contingent consideration
Total financials liabilities
Level 2 [Member]    
Assets:    
Corporate bonds 5,488 8,757
Convertible bonds 1,112 1,156
Total financial assets 6,600 9,913
Liabilities:    
Contingent consideration
Total financials liabilities
Level 3 [Member]    
Assets:    
Corporate bonds
Convertible bonds
Total financial assets
Liabilities:    
Contingent consideration 5,964 414
Total financials liabilities $ 5,964 $ 414