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The Company and its Significant Accounting Policies - Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) | 12 Months Ended |
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Dec. 31, 2023 | Dec. 31, 2022
The Company and its Significant Accounting Policies |  |
Amount of cash insured | $ 94,000 | $ 8,400,000
Excess of the federal deposit insurance corporation | 250,000 |
China |  |
The Company and its Significant Accounting Policies |  |
Cash uninsured | 1,100,000 | 700,000
Singapore |  |
The Company and its Significant Accounting Policies |  |
Cash uninsured | 132,000 | 168,000
Hong Kong |  |
The Company and its Significant Accounting Policies |  |
Cash uninsured | 40,000 | $ 63,000
United Kingdom |  |
The Company and its Significant Accounting Policies |  |
Cash uninsured | $ 1,100,000 |

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- Definition The amount of cash deposited in financial institutions as of the balance sheet date that is insured by the Federal Deposit Insurance Corporation. + References No definition available. + Details
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