Segment Information (Summary Of Net Revenues By Product) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Product Information [Line Items]
Total revenues	$ 35,731	$ 35,536
BioGlue And BioFoam [Member]
Product Information [Line Items]
Total revenues	15,240	15,464
PerClot [Member]
Product Information [Line Items]
Total revenues	916	864
Revascularization Technologies [Member]
Product Information [Line Items]
Total revenues	1,684	2,191
HeRO Graft [Member]
Product Information [Line Items]
Total revenues	1,615	1,277
Total Products [Member]
Product Information [Line Items]
Total revenues	19,455	19,796
Cardiac Tissue [Member]
Product Information [Line Items]
Total revenues	7,190	6,645
Vascular Tissue [Member]
Product Information [Line Items]
Total revenues	9,086	9,032
Total Preservation Services [Member]
Product Information [Line Items]
Total revenues	16,276	15,677
Other Segments [Member]
Product Information [Line Items]
Total revenues		$ 63	[1]

[1] The “Other” designation includes grant revenue.