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Note 2 - Acquisitions and Divestitures - Assets Acquired and Liabilities Assumed (Details)
€ in Thousands, $ in Thousands
Dec. 31, 2019
USD ($)
Oct. 11, 2019
USD ($)
Jul. 12, 2019
USD ($)
Dec. 31, 2018
USD ($)
Oct. 22, 2018
EUR (€)
Sep. 20, 2018
USD ($)
Dec. 31, 2017
USD ($)
Goodwill $ 39,951     $ 29,868     $ 23,844
Goodwill $ 39,951     $ 29,868     $ 23,844
CardioCel and VascuCel Biologic Patches [Member]              
Inventory and other   $ 1,343          
Intangible assets   8,725          
Goodwill   7,344          
Purchase price   17,412          
Intangible assets   8,725          
Goodwill   $ 7,344          
Tru-Incise Valve Cutter [Member]              
Intangible assets     $ 4,844        
Goodwill     2,748        
Purchase price     7,938        
Inventory     276        
Equipmentand supplies     70        
Intangible assets     4,844        
Goodwill     $ 2,748        
Cardial [Member]              
Intangible assets | €         € 623    
Purchase price | €         1,940    
Inventory | €         2,419    
Equipmentand supplies | €         94    
Intangible assets | €         623    
Land and building | €         750    
Bargain purchase gain | €         € (1,946)    
Applied Medical [Member]              
Intangible assets           $ 6,527  
Goodwill           6,361  
Purchase price           14,043  
Inventory           739  
Equipmentand supplies           416  
Intangible assets           6,527  
Goodwill           $ 6,361