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Property, Plant and Equipment, Net | 9 Months Ended
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Sep. 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):
| September 30, |  | December 31,
| 2024 |  | 2023
Production equipment | $ | 6,959 |  |  | $ | 6,253 |
Lab equipment | 2,536 |  |  | 2,502 |
Leasehold improvements | 11,217 |  |  | 11,152 |
Furniture, fixtures and other equipment | 385 |  |  | 376 |
Construction in progress | 14,838 |  |  | 10,527 |
Property, plant and equipment, at cost | 35,935 |  |  | 30,810 |
Less: accumulated depreciation and amortization | (11,967) |  |  | (9,050) |
Property, plant and equipment, net | $ | 23,968 |  |  | $ | 21,760 |
Construction in progress consists primarily of production equipment that we purchased but have not yet placed in service, as well as pre-construction costs related to the planning of our GWh-scale manufacturing facility in Brighton, Colorado. Depreciation and amortization expense was $0.8 million and $2.9 million during the three and nine months ended September 30, 2024, respectively, and $0.4 million and $1.3 million during the three and nine months ended September 30, 2023, respectively.

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/360/tableOfContent Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 6 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477798/958-360-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477798/958-360-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 7 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477798/958-360-50-7 + Details
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