Segment And Geographic Information (Revenues, Cost Of Products And Services, And Gross Margins For Operating Segments) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) segment	Jun. 30, 2015 USD ($)
Number of reportable segments | segment			2
Total revenues	$ 47,083	$ 35,526	$ 90,099	$ 69,357
Total cost of products and preservation services	16,782	13,972	32,177	28,136
Total gross margin	30,301	21,554	57,922	41,221
Operating Segments [Member] | Medical Devices [Member]
Total revenues	30,045	19,918	57,063	39,309
Total cost of products and preservation services	7,698	4,244	14,701	9,277
Total gross margin	22,347	15,674	42,362	30,032
Operating Segments [Member] | Preservation Services [Member]
Total revenues	17,038	15,608	33,036	30,048
Total cost of products and preservation services	9,084	9,728	17,476	18,859
Total gross margin	$ 7,954	$ 5,880	$ 15,560	$ 11,189