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Balance Sheet Components - Schedule of Inventories (Detail) - USD ($) $ in Thousands | Mar. 31, 2026 | Dec. 31, 2025
--- | --- | ---
Inventory, Net [Abstract] |  |  |
Finished goods |  | $ 154 | $ 0
Total inventories, current |  | 154 | 0
Inventories, long-term | [1] | 3,843 | 0
Total current and long-term inventories |  | $ 3,997 | $ 0
[1] | Inventories, long-term, are comprised of raw materials and work in process that are expected to be sold beyond the next 12 months.

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