Revenue Recognition (Disaggregation Of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Total sources of revenue	$ 76,838	$ 72,207	$ 234,391	$ 219,442
Domestic hospitals
Disaggregation of Revenue [Line Items]
Total sources of revenue	40,842	36,129	117,343	111,291
International hospitals
Disaggregation of Revenue [Line Items]
Total sources of revenue	24,119	25,458	79,768	79,219
International distributors
Disaggregation of Revenue [Line Items]
Total sources of revenue	11,469	10,544	34,685	28,694
CardioGenesis cardiac laser therapy
Disaggregation of Revenue [Line Items]
Total sources of revenue	$ 408	$ 76	$ 2,595	$ 238