Revenue Recognition (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Total sources of revenue	$ 313,789	$ 298,836	$ 253,227
Domestic hospitals
Disaggregation of Revenue [Line Items]
Total sources of revenue	158,129	150,301	137,810
International hospitals
Disaggregation of Revenue [Line Items]
Total sources of revenue	105,072	106,639	80,524
International distributors
Disaggregation of Revenue [Line Items]
Total sources of revenue	47,604	41,046	34,429
CardioGenesis cardiac laser therapy
Disaggregation of Revenue [Line Items]
Total sources of revenue	$ 2,984	$ 850	$ 464