Segment and Geographic Information (Summary Of Net Revenues By Product And Service) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Product Information [Line Items]
Total revenues	$ 313,789	$ 298,836	$ 253,227
Products
Product Information [Line Items]
Total revenues	230,353	221,597	179,299
Aortic stent grafts
Product Information [Line Items]
Total revenues	92,752	85,387	61,663
Surgical sealants
Product Information [Line Items]
Total revenues	65,379	70,714	62,068
On-X
Product Information [Line Items]
Total revenues	63,904	57,363	48,053
Other
Product Information [Line Items]
Total revenues	8,318	8,133	7,515
Preservation services
Product Information [Line Items]
Total revenues	$ 83,436	$ 77,239	$ 73,928