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Inventories And Deferred Preservation Costs
 12 Months Ended
Dec. 31, 2017
Inventories And Deferred Preservation Costs [Abstract]  
Inventories And Deferred Preservation Costs

10.  Inventories and Deferred Preservation Costs



Inventories at December 31, 2017 and 2016 are comprised of the following (in thousands):



 

 

 

 

 



2017

 

2016

Raw materials and supplies

$

 16,328 

 

$

 9,321 

Work-in-process

 

 5,504 

 

 

 3,321 

Finished goods

 

 24,852 

 

 

 13,651 

Total inventories

$

 46,684 

 

$

 26,293 



Deferred preservation costs at December 31, 2017 and 2016 are comprised of the following (in thousands):







 

 

 

 

 



2017

 

2016

Cardiac tissues

$

 16,988 

 

$

 15,768 

Vascular tissues

 

 18,683 

 

 

 14,920 

Total deferred preservation costs

$

 35,671 

 

$

 30,688 



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 this consignment inventory until the device is implanted, at which time we invoice the hospital.  As of December 31, 2017 we had $9.3 million in consignment inventory, with approximately 58% in domestic locations and 42% in foreign locations.    As of December 31, 2016 we had $4.9 million in consignment inventory, with approximately 80% in domestic locations and 20% in foreign locations.