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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
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Total revenues	$ 67,505	$ 61,948
Total cost of products and preservation services	23,232	22,720
Total gross margin	44,273	39,228
Goodwill	186,706		$ 188,781
Operating Segments [Member] | Medical Devices [Member]
Segment Reporting Information [Line Items]
Total revenues	48,401	43,598
Total cost of products and preservation services	13,826	14,157
Total gross margin	34,575	29,441
Operating Segments [Member] | Preservation Services [Member]
Segment Reporting Information [Line Items]
Total revenues	19,104	18,350
Total cost of products and preservation services	9,406	8,563
Total gross margin	$ 9,698	$ 9,787

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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.

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