Segment And Geographic Information (Revenues, Cost Of Products And Services, And Gross Margins For Operating Segments) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($) segment	Mar. 31, 2015 USD ($)
Number of reportable segments | segment	2
Total revenues	$ 43,016	$ 33,831
Total cost of products and preservation services	15,395	14,164
Total gross margin	27,621	19,667
Operating Segments [Member] | Medical Devices [Member]
Total revenues	27,018	19,391
Total cost of products and preservation services	7,003	5,033
Total gross margin	20,015	14,358
Operating Segments [Member] | Preservation Services [Member]
Total revenues	15,998	14,440
Total cost of products and preservation services	8,392	9,131
Total gross margin	$ 7,606	$ 5,309