The Company and its Significant Accounting Policies - Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| The Company and its Significant Accounting Policies | ||
| Amount of cash insured | $ 0 | |
| Excess of the federal deposit insurance corporation | 250,000 | |
| China | ||
| The Company and its Significant Accounting Policies | ||
| Cash uninsured | 700,000 | $ 1,300,000 |
| United Kingdom | ||
| The Company and its Significant Accounting Policies | ||
| Cash uninsured | 1,400,000 | 400,000 |
| Hong Kong | ||
| The Company and its Significant Accounting Policies | ||
| Cash uninsured | $ 38,000 | $ 12,000 |