Balance Sheet Components - Summary of Property and Equipment, Net (Details) - USD ($) $ in Thousands |
Mar. 31, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Property Plant And Equipment [Line Items] | ||
| Property and equipment, gross | $ 4,066 | $ 4,011 |
| Less: Accumulated depreciation | (2,448) | (2,401) |
| Property and equipment, net | 1,618 | 1,610 |
| Tools and Equipment | ||
| Property Plant And Equipment [Line Items] | ||
| Property and equipment, gross | 2,208 | 2,215 |
| Computer Equipment and Software | ||
| Property Plant And Equipment [Line Items] | ||
| Property and equipment, gross | 37 | 37 |
| Furniture and Fixtures | ||
| Property Plant And Equipment [Line Items] | ||
| Property and equipment, gross | 457 | 461 |
| Leasehold Improvements | ||
| Property Plant And Equipment [Line Items] | ||
| Property and equipment, gross | 38 | 38 |
| Construction In Process | ||
| Property Plant And Equipment [Line Items] | ||
| Property and equipment, gross | $ 1,326 | $ 1,260 |