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, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Total revenues	$ 298,836	$ 253,227	$ 276,222
Total cost of products and preservation services	101,322	85,443	93,209
Total gross margin	197,514	167,784	183,013
Medical Devices [Member]
Segment Reporting Information [Line Items]
Total revenues	221,597	179,299	197,246
Total cost of products and preservation services	65,196	50,128	55,022
Total gross margin	156,401	129,171	142,224
Preservation Services [Member]
Segment Reporting Information [Line Items]
Total revenues	77,239	73,928	78,976
Total cost of products and preservation services	36,126	35,315	38,187
Total gross margin	$ 41,113	$ 38,613	$ 40,789