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Revenue Recognition
 3 Months Ended
Mar. 31, 2023
Revenue from Contract with Customer [Abstract]  
Revenue Recognition 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 three months ended March 31, 2023 and 2022 the sources of revenue were as follows (in thousands):
Three Months Ended
March 31,
20232022
Domestic hospitals$40,883$36,993
International hospitals28,95728,414
International distributors12,93911,064
CardioGenesis cardiac laser therapy450742
Total sources of revenue$83,229$77,213
Also see segment disaggregation information in Note 12 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 March 31, 2023 and 2022.
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 March 31, 2023 and 2022 was not material.