Revenue Recognition (Tables)

12 Months Ended

Dec. 31, 2020

Revenue Recognition [Abstract]

Disaggregation Of Revenue

		2020		2019		2018
Domestic hospitals	$	137,810		144,538	$	138,432
International hospitals		80,524		85,241		81,203
International distributors		34,429		40,427		36,989
CardioGenesis cardiac laser therapy		464		6,016		6,217
Total sources of revenue	$	253,227	$	276,222	$	262,841