Balance Sheet Components - Property and Equipment, Net (Details) - USD ($) $ in Thousands |
Jun. 30, 2022 |
Dec. 31, 2021 |
|---|---|---|
| Property and Equipment, Net | ||
| Property and equipment, gross | $ 21,172 | $ 15,958 |
| Less: Accumulated depreciation and amortization | (8,362) | (6,966) |
| Property and equipment, net | 12,810 | 8,992 |
| Machinery and equipment | ||
| Property and Equipment, Net | ||
| Property and equipment, gross | 12,721 | 10,573 |
| Construction in progress | ||
| Property and Equipment, Net | ||
| Property and equipment, gross | 5,604 | 3,657 |
| Construction in progress, surgical placement instrument set | ||
| Property and Equipment, Net | ||
| Property and equipment, gross | 3,800 | |
| Computer and office equipment | ||
| Property and Equipment, Net | ||
| Property and equipment, gross | 909 | 916 |
| Leasehold improvements | ||
| Property and Equipment, Net | ||
| Property and equipment, gross | 1,631 | 503 |
| Furniture and fixtures | ||
| Property and Equipment, Net | ||
| Property and equipment, gross | $ 307 | $ 309 |