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Inventory, Net
3 Months Ended
Mar. 31, 2024
Inventory Disclosure [Abstract]  
Inventory, Net Inventory, Net
All of the Company's inventory relates to the manufacturing of MARGENZA. The following table sets forth the Company's net inventory (in thousands):
March 31, 2024December 31, 2023
Work in process$209 $261 
Finished goods1,039 960 
Total inventory, net$1,248 $1,221 
Prior to FDA approval of MARGENZA in December 2020, the cost of materials and expenses associated with the manufacturing of MARGENZA were recorded as research and development expense. Subsequent to FDA approval, the Company began capitalizing inventory costs related to the manufacture of MARGENZA. The inventory balance as of March 31, 2024 and December 31, 2023 is net of a reserve of $1.3 million and $3.1 million, respectively, for unsaleable inventory. These reserves are reflected in cost of product sales during the period they are recorded.