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Note 2 - Acquisitions and Divestitures - Assets Acquired and Liabilities Assumed (Details)
€ in Thousands, $ in Thousands
Dec. 31, 2020
USD ($)
Jun. 22, 2020
USD ($)
Dec. 31, 2019
USD ($)
Oct. 11, 2019
USD ($)
Jul. 12, 2019
USD ($)
Dec. 31, 2018
USD ($)
Oct. 22, 2018
EUR (€)
Sep. 20, 2018
USD ($)
Goodwill $ 65,945   $ 39,951     $ 29,868    
Artegraft Inc [Member]                
Inventory   $ 3,859            
Accounts receivable   1,789            
Equipment and supplies   1,140            
Accounts payable and other   53            
Intangible assets   39,056            
Goodwill   27,115            
Purchase price   $ 72,906            
CardioCel and VascuCel Biologic Patches [Member]                
Intangible assets       $ 8,725        
Goodwill       7,344        
Purchase price       17,412        
Inventory and other       $ 1,343        
Tru-Incise Valve Cutter [Member]                
Inventory         $ 276      
Equipment and supplies         70      
Intangible assets         4,844      
Goodwill         2,748      
Purchase price         $ 7,938      
Cardial [Member]                
Inventory | €             € 2,419  
Equipment and supplies | €             94  
Intangible assets | €             623  
Purchase price | €             1,940  
Land and building | €             750  
Bargain purchase gain | €             € (1,946)  
Applied Medical [Member]                
Inventory               $ 739
Equipment and supplies               416
Intangible assets               6,527
Goodwill               6,361
Purchase price               $ 14,043