Segment Information (Summary Of Net Revenues By Product) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Product Information [Line Items]
Total revenues	$ 35,536		$ 32,301
BioGlue And BioFoam [Member]
Product Information [Line Items]
Total revenues	15,464		13,696
PerClot [Member]
Product Information [Line Items]
Total revenues	864		644
Revascularization Technologies [Member]
Product Information [Line Items]
Total revenues	2,191		2,114
HeRO Graft [Member]
Product Information [Line Items]
Total revenues	1,277
Total Products [Member]
Product Information [Line Items]
Total revenues	19,796		16,454
Cardiac Tissue [Member]
Product Information [Line Items]
Total revenues	6,645		7,080
Vascular Tissue [Member]
Product Information [Line Items]
Total revenues	9,032		8,579
Total Preservation Services [Member]
Product Information [Line Items]
Total revenues	15,677		15,659
Other [Member]
Product Information [Line Items]
Total revenues	$ 63	[1]	$ 188	[1]

[1] For the three months ended March 31, 2013 and 2012 the “Other” designation includes grant revenue.