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Property, Plant and Equipment, Net
 3 Months Ended
Mar. 31, 2026
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):
March 31,December 31,
20262025
Production equipment$2,839 $2,839 
Lab equipment1,032 1,032 
Leasehold improvements11,162 11,163 
Furniture, fixtures and other equipment219 219 
Construction in progress6,168 4,340 
Property, plant and equipment, at cost21,420 19,593 
Less: accumulated depreciation and amortization(10,674)(9,913)
Property, plant and equipment, net$10,746 $9,680 
Construction in progress consists primarily of production and other equipment that have not been placed in service as of March 31, 2026 and December 31, 2025.
Depreciation and amortization expense was $0.8 million and $0.9 million during the three months ended March 31, 2026 and 2025, respectively.
As reflected in the balance as of December 31, 2025, we recorded a $4.7 million impairment loss related to construction-in-progress assets for our manufacturing facility in Brighton, Colorado, in connection with our decision to terminate the lease; and a $3.5 million loss related to the retirement of production equipment at our Fremont, California facility that was no longer expected to generate future economic benefit.