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Segment And Geographic Information (Revenues, Cost Of Products And Services, And Gross Margins For Operating Segments) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | [2] | Jun. 30, 2017 | [2] | Mar. 31, 2017 | [2] | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues | $ 67,799 | [1] | $ 64,598 | $ 68,496 | $ 61,948 | $ 52,826 | [2] | $ 43,999 | $ 47,818 | $ 45,059 | $ 45,029 | $ 45,252 | $ 47,083 | $ 43,016 | $ 262,841 | $ 189,702 | $ 180,380
Total cost of products and preservation services |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 89,857 | 61,060 | 61,481
Total gross margin | 45,191 | [1] | $ 42,714 | $ 45,851 | $ 39,228 | 36,363 | [2] | $ 29,862 | $ 32,905 | $ 29,512 | 31,195 | $ 29,782 | $ 30,301 | $ 27,621 | 172,984 | 128,642 | 118,899
Goodwill | 188,781 |  |  |  |  | 188,305 |  |  |  |  | $ 78,294 |  |  |  | 188,781 | 188,305 | 78,294
Medical Devices [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill | 188,800 |  |  |  |  | 188,300 |  |  |  |  |  |  |  |  | 188,800 | 188,300 |
Operating Segments [Member] | Medical Devices [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 187,394 | 119,631 | 113,992
Total cost of products and preservation services |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 53,772 | 29,798 | 28,033
Total gross margin |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 133,622 | 89,833 | 85,959
Operating Segments [Member] | Preservation Services [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 75,447 | 70,071 | 66,388
Total cost of products and preservation services |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 36,085 | 31,262 | 33,448
Total gross margin |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 39,362 | 38,809 | 32,940
Domestic [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 144,651 | $ 135,102 | $ 131,727
Domestic [Member] | Long-Lived Assets [Member] | Geographic Concentration Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 57.00% | 60.00% |
GERMANY |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-lived assets | $ 13,100 |  |  |  |  | $ 13,300 |  |  |  |  |  |  |  |  | $ 13,100 | $ 13,300 |
GERMANY | Long-Lived Assets [Member] | Geographic Concentration Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 98.00% | 99.00% |
[1] | In December 2017 we completed our acquisition of JOTEC, which is also being operated as a wholly-owned subsidiary of CryoLife.
[2] | In January 2016 we completed our acquisition of On-X Life Technologies Holdings, Inc., which is being operated as a wholly-owned subsidiary of CryoLife. In 2016 we also sold our HeRO Graft product line and our ProCol product line, and ceased sales of these products during 2016.

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