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Intangible Assets, Net - Components of Identifiable Intangible Assets (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Finite-Lived Intangible Assets, Net [Abstract] |  |
Intangible assets, gross | $ 4,367 | $ 4,367
Less: accumulated amortization | (4,367) | (4,367)
Intangible assets, net | 0 | 0
Purchased intangible |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Intangible assets, gross | 3,858 | 3,858
Purchased patent |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Intangible assets, gross | $ 509 | $ 509

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