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Segment And Geographic Information (Revenues, Cost Of Products And Services, And Gross Margins For Operating Segments) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Segment Reporting Information [Line Items] |  |  |
Total revenues | $ 253,227 | $ 276,222 | $ 262,841
Total cost of products and preservation services | 85,443 | 93,209 | 89,857
Total gross margin | 167,784 | 183,013 | 172,984
Medical Devices [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 179,299 | 197,246 | 187,394
Total cost of products and preservation services | 50,128 | 55,022 | 53,772
Total gross margin | 129,171 | 142,224 | 133,622
Preservation Services [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 73,928 | 78,976 | 75,447
Total cost of products and preservation services | 35,315 | 38,187 | 36,085
Total gross margin | $ 38,613 | $ 40,789 | $ 39,362

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- Definition The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 924 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a),(d)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
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