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Inventory
 12 Months Ended
Dec. 31, 2021
Inventory Disclosure [Abstract]  
Inventory Inventory
Inventory consisted of the following:

December 31,
(in thousands)20212020
Raw materials$15,505 $16,000 
Work in process13,042 11,212 
Finished goods6,582 8,532 
Total inventory$35,129 $35,744 
Inventory costs associated with products that have not yet received regulatory approval are capitalized if the Company believes there is probable future commercial use of the product and future economic benefit of the asset. If future commercial use of the product is not probable, then inventory costs associated with such product are expensed during the period the costs are incurred. As of December 31, 2021, the Company had $6.1 million of such product costs included in inventories related to DEFINITY that have been manufactured through the Company’s in-house manufacturing capabilities, which is awaiting regulatory approval.