Segment Information And Geographic (Tables)	12 Months Ended
	Dec. 31, 2021
Segment And Geographic Information [Abstract]
Revenues, Cost Of Products And Services, And Gross Margins For Operating Segments	2021 2020 2019Revenues: Medical devices$ 221,597 $ 179,299 $ 197,246Preservation services 77,239 73,928 78,976Total revenues 298,836 253,227 276,222 Cost of products and preservation services: Medical devices 65,196 50,128 55,022Preservation services 36,126 35,315 38,187Total cost of products and preservation services 101,322 85,443 93,209 Gross margin: Medical devices 156,401 129,171 142,224Preservation services 41,113 38,613 40,789Total gross margin$ 197,514 $ 167,784 $ 183,013
Summary Of Net Revenues By Product And Service	2021 2020 2019Products: Aortic stents and stent grafts$ 85,387 $ 61,663 $ 64,974Surgical sealants 70,714 62,068 68,611On-X 57,363 48,053 50,096Other 8,133 7,515 13,565Total products 221,597 179,299 197,246 Preservation services: 77,239 73,928 78,976Total revenues$ 298,836 $ 253,227 $ 276,222
Schedule Of Net Revenues By Geographic Location	2021 2020 2019US$ 151,151 $ 138,274 $ 150,553International 147,685 114,953 125,669Total revenues$ 298,836 $ 253,227 $ 276,222