Segment And Geographic Information (Summary Of Net Revenues By Product And Service) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Product Information [Line Items]
Total revenues	$ 47,083	$ 35,526	$ 90,099	$ 69,357
BioGlue And BioFoam [Member]
Product Information [Line Items]
Total revenues	16,187	14,519	31,503	28,561
On-X [Member]
Product Information [Line Items]
Total revenues	9,554		16,269
CardioGenesis Cardiac Laser Therapy [Member]
Product Information [Line Items]
Total revenues	1,860	1,943	3,844	4,080
PerClot [Member]
Product Information [Line Items]
Total revenues	1,042	1,036	2,033	2,012
PhotoFix [Member]
Product Information [Line Items]
Total revenues	490	343	871	515
HeRO Graft [Member]
Product Information [Line Items]
Total revenues	912	1,744	2,325	3,604
ProCol [Member]
Product Information [Line Items]
Total revenues		333	218	537
Cardiac Tissue [Member]
Product Information [Line Items]
Total revenues	7,548	6,889	13,976	13,552
Vascular Tissue [Member]
Product Information [Line Items]
Total revenues	9,490	8,719	19,060	16,496
Operating Segments [Member] | Total Products [Member]
Product Information [Line Items]
Total revenues	30,045	19,918	57,063	39,309
Operating Segments [Member] | Total Preservation Services [Member]
Product Information [Line Items]
Total revenues	$ 17,038	$ 15,608	$ 33,036	$ 30,048