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Commitments and Contingencies - Assets Pledged as Collateral (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Borrowings |  |  |
Borrowings | $ 50,470 | $ 79,856 |
Cash and cash equivalents | 16,122 | 258 | $ 1,398
Accounts receivable | 5,103 | 4,920 | 4,453
Inventory | 1,784 | 1,486 | 3,480
Property and equipment | 644 | 772 | 1,111
KEB Hana Bank | Related party | Assets pledged as collateral | Borrowings |  |  |
Borrowings |  |  |
Borrowings | 6,700 | 7,000 | 7,100
IBK Industrial Bank | Related party | Assets pledged as collateral | Borrowings |  |  |
Borrowings |  |  |
Borrowings | 6,800 | 7,100 | 7,300
Anapass, Inc. | Related party | Assets pledged as collateral | Borrowings |  |  |
Borrowings |  |  |
Borrowings | 9,700 | 10,100 | 10,300
Cash and cash equivalents | 16,122 | 254 | 1,363
Accounts receivable | 5,118 | 4,920 | 4,453
Inventory | 1,784 | 1,486 | 3,480
Property and equipment | 1,988 | 352 | 485
Intangible assets and others | $ 187 | $ 199 | $ 531

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