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Property, Plant, and Equipment - Schedule of Property, plant and equipment (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Total property, plant and equipment | $ 18,753 | $ 18,265
Accumulated depreciation and amortization | (14,407) | (14,114)
Property, Plant and Equipment, Net, Total | 4,346 | 4,151
Lab and build-to-suit equipment |  |
Total property, plant and equipment | 6,344 | 6,257
Office equipment |  |
Total property, plant and equipment | 19 | 19
Furniture and fixtures |  |
Total property, plant and equipment | 134 | 134
Computer equipment |  |
Total property, plant and equipment | 400 | 291
Leasehold improvements |  |
Total property, plant and equipment | 11,409 | 11,409
Construction-in-progress |  |
Total property, plant and equipment | $ 447 | $ 155

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