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Segment Information (Revenues, Cost Of Products And Services, And Gross Margins For Operating Segments) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Total revenues	$ 64,598	$ 43,999	$ 195,042	$ 136,876
Total cost of products and preservation services	21,884	14,137	67,249	44,597
Total gross margin	42,714	29,862	127,793	92,279
Operating Segments [Member] | Medical Devices [Member]
Segment Reporting Information [Line Items]
Total revenues	45,152	27,029	138,063	84,519
Total cost of products and preservation services	12,459	6,220	40,166	21,196
Total gross margin	32,693	20,809	97,897	63,323
Operating Segments [Member] | Preservation Services [Member]
Segment Reporting Information [Line Items]
Total revenues	19,446	16,970	56,979	52,357
Total cost of products and preservation services	9,425	7,917	27,083	23,401
Total gross margin	$ 10,021	$ 9,053	$ 29,896	$ 28,956

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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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