Segment And Geographic Information (Summary Of Net Revenues By Product) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Product Information [Line Items]
Total revenues	$ 131,718		$ 119,626		$ 116,645
Cardiac Tissue [Member]
Product Information [Line Items]
Total revenues	29,756		26,618		27,997
Vascular Tissue [Member]
Product Information [Line Items]
Total revenues	33,847		33,175		31,727
Total Preservation Services [Member]
Product Information [Line Items]
Total revenues	63,603		59,793		59,724
BioGlue And BioFoam [Member]
Product Information [Line Items]
Total revenues	53,211		49,455		47,383
PerClot [Member]
Product Information [Line Items]
Total revenues	3,078		2,528		264
HemoStase [Member]
Product Information [Line Items]
Total revenues			1,699		8,793
Revascularization Technologies [Member]
Product Information [Line Items]
Total revenues	8,092		5,705
HeRO Graft [Member]
Product Information [Line Items]
Total revenues	3,115
Other Medical Devices [Member]
Product Information [Line Items]
Total revenues					(70)
Total Products [Member]
Product Information [Line Items]
Total revenues	67,496		59,387		56,370
Other [Member]
Product Information [Line Items]
Total revenues	$ 619	[1]	$ 446	[1]	$ 551	[1]

[1] For the years ended December 31, 2012, 2011, and 2010 the “Other” designation includes grant revenue.