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Segment Information (Summary Of Net Revenues By Product And Service) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Product Information [Line Items] |  |  |  |
Total revenues | $ 43,999 | $ 45,252 | $ 136,876 | $ 135,351
BioGlue And BioFoam [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | 15,730 | 15,976 | 48,094 | 47,479
On-X [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | 8,326 | 8,890 | 27,048 | 25,159
CardioGenesis Cardiac Laser Therapy [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | 1,489 | 1,653 | 5,130 | 5,497
PerClot [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | 886 | 950 | 2,641 | 2,983
PhotoFix [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | 598 | 535 | 1,606 | 1,406
HeRO Graft [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues |  |  |  | 2,325
ProCol [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues |  |  |  | 218
Cardiac Tissues [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | 7,932 | 8,279 | 23,911 | 22,255
Vascular Tissues [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | 9,038 | 8,969 | 28,446 | 28,029
Operating Segments [Member] | Total Products [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | 27,029 | 28,004 | 84,519 | 85,067
Operating Segments [Member] | Total Preservation Services [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | $ 16,970 | $ 17,248 | $ 52,357 | $ 50,284

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