Segment And Geographic Information (Summary Of Net Revenues By Product) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended												12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2014	Dec. 31, 2013		Dec. 31, 2012
Product Information [Line Items]
Total revenues	$ 37,151	$ 37,069	$ 34,690	$ 35,731	$ 35,457	$ 36,250	$ 33,520	$ 35,536	$ 32,800	$ 33,429	$ 33,188	$ 32,301	$ 144,641	$ 140,763		$ 131,718
BioGlue And BioFoam [Member]
Product Information [Line Items]
Total revenues													62,091	58,004		53,211
PerClot [Member]
Product Information [Line Items]
Total revenues													4,289	3,494		3,078
CardioGenesis Cardiac Laser Therapy [Member]
Product Information [Line Items]
Total revenues													8,225	8,965		8,092
HeRO Graft [Member]
Product Information [Line Items]
Total revenues													7,131	5,731		3,115
ProCol [Member]
Product Information [Line Items]
Total revenues													147
Medical Devices [Member]
Product Information [Line Items]
Total revenues													81,883	76,194		67,496
Cardiac Tissue [Member]
Product Information [Line Items]
Total revenues													29,437	29,523		29,756
Vascular Tissue [Member]
Product Information [Line Items]
Total revenues													33,321	34,975		33,847
Preservation Services [Member]
Product Information [Line Items]
Total revenues													62,758	64,498		63,603
Other Segments [Member]
Product Information [Line Items]
Total revenues														$ 71	[1]	$ 619	[1]

[1] For the years ended December 31, 2013 and 2012 the “Other” designation includes grant revenue.