The Company and Summary of Significant Accounting Policies - Autonomous Security Robots, net (Details) - Autonomous Security Robots, net - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
|
| Research and development expense | ||
| Autonomous Security Robots, net | ||
| Depreciation expense of finished ASRs | $ 66 | $ 82 |
| Sales and marketing expense | ||
| Autonomous Security Robots, net | ||
| Depreciation expense of finished ASRs | 46 | 71 |
| Cost of revenue, net | ||
| Autonomous Security Robots, net | ||
| Depreciation expense of finished ASRs | $ 1,400 | $ 1,400 |
| Minimum | ||
| Autonomous Security Robots, net | ||
| Estimated expected lives | 3 years | |
| Maximum | ||
| Autonomous Security Robots, net | ||
| Estimated expected lives | 5 years | |