Segment Information (Summary Of Net Revenues By Product And Service) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Product Information [Line Items]
Total revenues	$ 76,838	$ 72,207	$ 234,391	$ 219,442
Products
Product Information [Line Items]
Total revenues	55,248	53,107	171,726	162,528
Aortic stent grafts
Product Information [Line Items]
Total revenues	19,674	20,896	69,013	62,165
Surgical sealants
Product Information [Line Items]
Total revenues	17,374	16,544	49,022	52,236
On-X
Product Information [Line Items]
Total revenues	16,456	14,022	47,082	41,843
Other
Product Information [Line Items]
Total revenues	1,744	1,645	6,609	6,284
Preservation services
Product Information [Line Items]
Total revenues	$ 21,590	$ 19,100	$ 62,665	$ 56,914