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Segment And Geographic Information (Summary Of Net Revenues By Product And Service) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | [1] | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | [1] | Sep. 30, 2017 | [1] | Jun. 30, 2017 | [1] | Mar. 31, 2017 | [1] | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues | $ 69,697 | $ 67,881 | $ 71,139 | $ 67,505 | $ 67,799 | $ 64,598 | $ 68,496 | $ 61,948 | $ 52,826 | $ 43,999 | $ 47,818 | $ 45,059 | $ 276,222 | $ 262,841 | $ 189,702
BioGlue [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  |  |  |  | 68,611 | 66,660 | 65,939
JOTEC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  |  |  |  | 64,974 | 63,341 | 4,136
On-X [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  |  |  |  | 50,096 | 44,832 | 37,041
CardioGenesis Cardiac Laser Therapy [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  |  |  |  | 6,016 | 6,217 | 6,866
PerClot [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  |  |  |  | 3,795 | 3,767 | 3,533
PhotoFix [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  |  |  |  | 3,754 | 2,577 | 2,116
Cardiac Tissue [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  |  |  |  | 40,879 | 35,683 | 32,510
Vascular Tissue [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  |  |  |  | 38,097 | 39,764 | 37,561
Preservation Services [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  |  |  |  | 78,976 | 75,447 | 70,071
Operating Segments [Member] | Medical Devices [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  |  |  |  | 197,246 | 187,394 | 119,631
Operating Segments [Member] | Preservation Services [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  |  |  |  | $ 78,976 | $ 75,447 | $ 70,071
[1] | In December 2017 we completed our acquisition of JOTEC, which is operated as a wholly-owned subsidiary of CryoLife.

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