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Inventories and Deferred Preservation Costs
 3 Months Ended
Mar. 31, 2025
Inventory Disclosure [Abstract]  
Inventories and Deferred Preservation Costs Inventories and Deferred Preservation Costs
Inventories consist of the following (in thousands):
March 31,
2025		December 31,
2024
Raw materials and supplies$34,494 $35,295 
Work-in-process16,278 13,926 
Finished goods31,155 30,545 
Total inventories, net $81,927 $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 March 31, 2025 we had $11.7 million in consignment inventory, with approximately 38% in domestic locations and 62% 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 $52.4 million and $51.7 million as of March 31, 2025 and December 31, 2024, respectively.