Segment Information (Summary Of Net Revenues By Product) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Product Information [Line Items]
Total revenues	$ 37,069	$ 36,250	$ 107,490	$ 105,306
BioGlue And BioFoam [Member]
Product Information [Line Items]
Total revenues	15,116	14,232	45,745	43,238
PerClot [Member]
Product Information [Line Items]
Total revenues	998	882	3,057	2,686
Revascularization Technologies [Member]
Product Information [Line Items]
Total revenues	2,306	2,353	6,074	6,837
HeRO Graft [Member]
Product Information [Line Items]
Total revenues	1,984	1,366	5,304	4,063
Other Products [Member]
Product Information [Line Items]
Total revenues	1		30
Medical Devices [Member]
Product Information [Line Items]
Total revenues	20,405	18,833	60,210	56,824
Cardiac Tissue [Member]
Product Information [Line Items]
Total revenues	8,337	8,572	21,981	22,035
Vascular Tissue [Member]
Product Information [Line Items]
Total revenues	8,327	8,845	25,299	26,376
Preservation Services [Member]
Product Information [Line Items]
Total revenues	16,664	17,417	47,280	48,411
Other Segments [Member]
Product Information [Line Items]
Total revenues				$ 71	[1]

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