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Sales Of Business Components (Narrative) (Details) - USD ($) $ in Thousands |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Mar. 18, 2016 | Feb. 03, 2016 | Mar. 31, 2017 | Sep. 30, 2017 | Sep. 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%

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