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Sales Of Business Components (Details) - USD ($)
 1 Months Ended 3 Months Ended 12 Months Ended
Mar. 18, 2016
Feb. 03, 2016
May 16, 2012
Jan. 31, 2015
Dec. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                  
Fair value of contingent consideration     $ 1,800,000           $ 0
Gain (loss) on revaluation of contingent consideration             $ 0 $ 0 1,900,000
Contingent consideration liability             0 0  
Proceeds from divestiture of business             19,795,000    
Payments to acquire distribution rights             $ 1,226,000    
Inventory received $ 1,700,000                
Hemosphere [Member]                  
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                  
Total purchase price     22,000,000            
Cash acquired from acquisition     3,200,000            
Maximum amount of future consideration payment     $ 4,500,000            
Hancock Jaffe [Member]                  
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                  
Distribution agreement amount of payment 3,400,000     $ 576,000   $ 1,200,000   $ 1,200,000 $ 1,700,000
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   $ 18,500,000              
Proceeds from divestiture of business   17,800,000              
Pre-tax gain (loss) on sale business components   $ 8,800,000              
HeRO Graft Product Line [Member] | Scenario, Forecast [Member]                  
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                  
Proceeds from divestiture of business         $ 740,000        
ProCol [Member]                  
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                  
Proceeds from divestiture of business 2,000,000                
Pre-tax gain (loss) on sale business components (845,000)                
Remaining prepayments settled $ 1,700,000                
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%