Segment And Geographic Information (Summary Of Net Revenues By Product And Service) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Product Information [Line Items]
Total revenues	$ 43,016	$ 33,831
BioGlue And BioFoam [Member]
Product Information [Line Items]
Total revenues	15,316	14,042
On-X [Member]
Product Information [Line Items]
Total revenues	6,715
CardioGenesis Cardiac Laser Therapy [Member]
Product Information [Line Items]
Total revenues	1,984	2,137
PerClot [Member]
Product Information [Line Items]
Total revenues	991	976
PhotoFix [Member]
Product Information [Line Items]
Total revenues	381	172
HeRO Graft [Member]
Product Information [Line Items]
Total revenues	1,413	1,860
ProCol [Member]
Product Information [Line Items]
Total revenues	218	204
Cardiac Tissue [Member]
Product Information [Line Items]
Total revenues	6,428	6,663
Vascular Tissue [Member]
Product Information [Line Items]
Total revenues	9,570	7,777
Operating Segments [Member] | Total Products [Member]
Product Information [Line Items]
Total revenues	27,018	19,391
Operating Segments [Member] | Total Preservation Services [Member]
Product Information [Line Items]
Total revenues	$ 15,998	$ 14,440