Segment And Geographic Information (Summary Of Net Revenues By Product And Service) (Details) - USD ($) $ in Thousands		3 Months Ended												12 Months Ended
		Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	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, 2015	Dec. 31, 2014	Dec. 31, 2013
Product Information [Line Items]
Total revenues		$ 39,838	$ 36,703	$ 35,526	$ 33,831	$ 37,151	$ 37,069	$ 34,690	$ 35,731	$ 35,457	$ 36,250	$ 33,520	$ 35,536	$ 145,898	$ 144,641	$ 140,763
BioGlue And BioFoam [Member]
Product Information [Line Items]
Total revenues														59,332	62,091	58,004
PerClot [Member]
Product Information [Line Items]
Total revenues														4,083	4,289	3,494
CardioGenesis Cardiac Laser Therapy [Member]
Product Information [Line Items]
Total revenues														9,419	8,225	8,965
HeRO Graft [Member]
Product Information [Line Items]
Total revenues														7,546	7,131	5,731
ProCol [Member]
Product Information [Line Items]
Total revenues														1,305	147
PhotoFix [Member]
Product Information [Line Items]
Total revenues														1,396
Cardiac Tissue [Member]
Product Information [Line Items]
Total revenues														28,059	29,437	29,523
Vascular Tissue [Member]
Product Information [Line Items]
Total revenues														34,758	33,321	34,975
Other Segments [Member]
Product Information [Line Items]
Total revenues	[1]															71
Operating Segments [Member] | Medical Devices [Member]
Product Information [Line Items]
Total revenues														83,081	81,883	76,194
Operating Segments [Member] | Preservation Services [Member]
Product Information [Line Items]
Total revenues														$ 62,817	$ 62,758	$ 64,498

[1] For the year ended December 31, 2013 the "Other" designation included grant revenue.