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Inventories And Deferred Preservation Costs | 12 Months Ended
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Dec. 31, 2019
Inventories And Deferred Preservation Costs [Abstract] |
Inventories And Deferred Preservation Costs | 6. Inventories and Deferred Preservation Costs Inventories at December 31, 2019 and 2018 are comprised of the following (in thousands):
| 2019 |  | 2018
Raw materials and supplies | $ | 21,180 |  | $ | 17,381
Work-in-process |  | 5,127 |  |  | 3,858
Finished goods |  | 26,764 |  |  | 24,239
Total inventories | $ | 53,071 |  | $ | 45,478
Deferred preservation costs at December 31, 2019 and 2018 are comprised of the following (in thousands):
| 2019 |  | 2018
Cardiac tissues | $ | 15,365 |  | $ | 15,972
Vascular tissues |  | 17,186 |  |  | 17,202
Total deferred preservation costs | $ | 32,551 |  | $ | 33,174
We maintain consignment inventory of our On-X heart valves at domestic hospital locations and On-X heart valves and JOTEC products at international hospital locations to facilitate usage. We retain title to and control over this consignment inventory until the device is implanted, at which time we invoice the hospital and recognize revenue. As of December 31, 2019 we had $12.0 million in consignment inventory, with approximately 51% in domestic locations and 49% in foreign locations. As of December 31, 2018 we had $11.2 million in consignment inventory, with approximately 55% in domestic locations and 45% in foreign locations.

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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