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Sales Of Business Components (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Mar. 18, 2016
Feb. 03, 2016
Mar. 31, 2017
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Proceeds from divestiture of business       $ 740 $ 19,795    
Hancock Jaffe [Member]              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Distribution agreement amount of payment       $ 3,400      
Inventory received $ 1,700            
HeRO Graft Product Line [Member]              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Amount of consideration received from sale of product line   $ 18,500          
Proceeds from divestiture of business     $ 740     $ 17,800  
Pre-tax gain (loss) on sale business components   $ 8,800          
ProCol [Member]              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Proceeds from divestiture of business 2,000            
Pre-tax gain (loss) on sale business components (845)            
Remaining prepayments settled $ 1,700            
HeRO Graft And ProCol Product Lines [Member] | Maximum [Member] | Product Lines Concentration Risk [Member] | Total Revenues [Member]              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Concentration percentage             10.00%
HeRO Graft And ProCol Product Lines [Member] | Maximum [Member] | Product Lines Concentration Risk [Member] | Long-Lived Assets [Member]              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Concentration percentage             10.00%