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Related Party Transactions (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023 | Dec. 31, 2022
Related Party Transactions |  |  |  |
Other | $ 107 |  | $ 72 | $ 104
Interest expense | 2,082 | $ 935 | 6,246 | 3,364
Related party | Anapass |  |  |  |
Related Party Transactions |  |  |  |
Borrowings | 9,653 |  | 10,082 | 10,257
Other | 106 |  | 212 | 11
Interest expense | 100 | 100 | 548 | 389
Related party | Kyeongho Lee |  |  |  |
Related Party Transactions |  |  |  |
Borrowings | 824 |  | 1,474 | 1,690
Other | 87 |  | 182 | 150
Interest expense | $ 22,000 | $ 26,000 | $ 110 | $ 140

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