Segment Information (Revenues, Cost Of Products And Services, And Gross Margins For Operating Segments) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Total revenues	$ 66,429	$ 67,505
Total cost of products and preservation services	22,258	23,232
Total gross margin	44,171	44,273
Goodwill	184,014		$ 186,697
Operating Segments [Member] | Medical Devices [Member]
Segment Reporting Information [Line Items]
Total revenues	46,420	48,401
Total cost of products and preservation services	13,040	13,826
Total gross margin	33,380	34,575
Operating Segments [Member] | Preservation Services [Member]
Segment Reporting Information [Line Items]
Total revenues	20,009	19,104
Total cost of products and preservation services	9,218	9,406
Total gross margin	$ 10,791	$ 9,698