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Inventories and Deferred Preservation Costs
 6 Months Ended
Jun. 30, 2025
Inventory Disclosure [Abstract]  
Inventories and Deferred Preservation Costs Inventories and Deferred Preservation Costs
Inventories consist of the following (in thousands):
June 30,
2025		December 31,
2024
Raw materials and supplies$36,246 $35,295 
Work-in-process17,821 13,926 
Finished goods32,656 30,545 
Inventories$86,723 $79,766 
To facilitate product usage, we maintain consignment inventory On-X heart valves at domestic hospital locations and On-X heart valves, aortic stent grafts, and AMDS products at international hospital locations. We retain title and control over this consignment inventory until we receive a notification of implantation, at which time we invoice the hospital and recognize revenue. As of June 30, 2025 we had $12.6 million in consignment inventory, with approximately 35% in domestic locations and 65% in international locations. As of December 31, 2024 we had $12.2 million in consignment inventory, with approximately 39% in domestic locations and 61% in foreign locations.
Total deferred preservation costs were $52.8 million and $51.7 million as of June 30, 2025 and December 31, 2024, respectively.