Revenue Recognition

12 Months Ended

Dec. 31, 2020

Revenue Recognition [Abstract]

Revenue Recognition

13. Revenue Recognition

Sources of Revenue

We have identified the following revenues disaggregated by revenue source:

Domestic Hospitals – direct sales of products and preservation services.

International Hospitals – direct sales of products and preservation services.

International Distributors – generally these contracts specify a geographic area that the distributor will service, terms and conditions of the relationship, and purchase targets for the next calendar year.

CardioGenesis Cardiac Laser Console Trials and Sales – CardioGenesis cardiac trialed laser consoles are delivered under separate agreements.

For the years ended December 31, 2020, 2019, and 2018 the sources of revenue were as follows (in thousands):

		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

Also see segment and geographic disclosure in Note 17 below.

Contract Balances

We may generate contract assets during the pre-delivery design and manufacturing stage of E-xtra DESIGN ENGINEERING product order fulfillment. We assess the balance related to any arrangements in process and determine if the enforceable right to payment creates a material contract asset requiring disclosure. No material arrangements in process existed as of December 31, 2020 and 2019.

We also incur contract obligations on general customer purchase orders that have been accepted but unfulfilled. Due to the short duration of time between order acceptance and delivery of the related product or service, we have determined that the balance related to these contract obligations is generally immaterial at any point in time. We monitor the value of orders accepted but unfulfilled at the close of each reporting period to determine if disclosure is appropriate. The value of orders accepted but unfulfilled as of December 31, 2020 and 2019 was not material.