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Other Current Assets (Detail) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | --- | ---
Other Assets [Abstract] |  |  |  |
Loans receivable - current | $ 24 | $ 29 |  |
Less: Allowance for loans receivable - current | (24) | (29) | $ (33) | $ (32)
Other receivable | 2 | 374 |  |
Other | 141 | 136 |  |
Other current assets | $ 143 | $ 510 |  |

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