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Property, Plant and Equipment, Net
 6 Months Ended
Jun. 30, 2024
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment, Net Property, Plant and Equipment, Net
Property, plant and equipment, net consisted of the following (in thousands):
June 30,December 31,
20242023
Production equipment$6,868 $6,253 
Lab equipment2,536 2,502 
Leasehold improvements11,199 11,152 
Furniture, fixtures and other equipment385 376 
Construction in progress14,064 10,527 
Property, plant and equipment, at cost35,052 30,810 
Less: accumulated depreciation and amortization(11,103)(9,050)
Property, plant and equipment, net$23,949 $21,760 
Depreciation and amortization expense was $1.1 million and $2.1 million during the three and six months ended June 30, 2024, respectively, and $0.5 million and $0.9 million during the three and six months ended June 30, 2023, respectively.