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Segment Information (Summary Of Net Revenues By Product And Service) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Product Information [Line Items] |  |  |  |
Total revenues | $ 47,818 | $ 47,083 | $ 92,877 | $ 90,099
BioGlue And BioFoam [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | 16,683 | 16,187 | 32,364 | 31,503
On-X [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | 9,862 | 9,554 | 18,722 | 16,269
CardioGenesis Cardiac Laser Therapy [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | 2,056 | 1,860 | 3,641 | 3,844
PerClot [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | 936 | 1,042 | 1,755 | 2,033
PhotoFix [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | 557 | 490 | 1,008 | 871
HeRO Graft [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues |  | 912 |  | 2,325
ProCol [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues |  |  |  | 218
Cardiac Tissues [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | 8,477 | 7,548 | 15,979 | 13,976
Vascular Tissues [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | 9,247 | 9,490 | 19,408 | 19,060
Operating Segments [Member] | Total Products [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | 30,094 | 30,045 | 57,490 | 57,063
Operating Segments [Member] | Total Preservation Services [Member] |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | $ 17,724 | $ 17,038 | $ 35,387 | $ 33,036

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