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ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables) | 12 Months Ended
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Dec. 31, 2023
Equity [Abstract] |
Accumulated Balances of Other Comprehensive Income (Loss) | The accumulated balances for each component of other comprehensive income (loss) are as follows:
(in US$ thousands) |  | Foreign currency items |  |  | Unrealized gain (loss) on securities |  |  | Pension and post retirement benefit plans |  |  | Accumulated other comprehensive loss |
Balance as of January 1, 2021 |  | $ | (21,956 | ) |  | $ | (351 | ) |  | $ | (94 | ) |  | $ | (22,401 | )
Foreign currency translation adjustment |  |  | 203 |  |  |  | — |  |  |  | — |  |  |  | 203 |
Pension and post retirement benefit adjustment |  |  | — |  |  |  | — |  |  |  | 14 |  |  |  | 14 |
Unrealized holding loss arising during period |  |  | — |  |  |  | (124 | ) |  |  | — |  |  |  | (124 | )
Reclassification adjustment for loss included in net income |  |  | — |  |  |  | 97 |  |  |  | — |  |  |  | 97 |
Other |  |  | — |  |  |  | (10 | ) |  |  | — |  |  |  | (10 | )
Balance as of December 31, 2021 |  |  | (21,753 | ) |  |  | (388 | ) |  |  | (80 | ) |  |  | (22,221 | )
Foreign currency translation adjustment |  |  | (190 | ) |  |  | — |  |  |  | — |  |  |  | (190 | )
Pension and post retirement benefit adjustment |  |  | — |  |  |  | — |  |  |  | 76 |  |  |  | 76 |
Unrealized holding loss arising during period |  |  | — |  |  |  | 620 |  |  |  | — |  |  |  | 620 |
Balance as of December 31, 2022 |  |  | (21,943 | ) |  |  | 232 |  |  |  | (4 | ) |  |  | (21,715 | )
Foreign currency translation adjustment |  |  | (144 | ) |  |  | 15 |  |  |  | — |  |  |  | (129 | )
Pension and post retirement benefit adjustment |  |  | — |  |  |  | — |  |  |  | (11 | ) |  |  | (11 | )
Unrealized holding loss arising during period |  |  | — |  |  |  | (1,453 | ) |  |  | — |  |  |  | (1,453 | )
Reclassification adjustments for loss included in net income |  |  |  |  |  | (76 | ) |  |  |  |  |  | (76 | )
Balance as of December 31, 2023 |  | $ | (22,087 | ) |  | $ | (1,282 | ) |  | $ | (15 | ) |  | $ | (23,384 | )

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-14A Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481674/830-30-50-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481694/830-30-45-20 + Details
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