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Income Taxes- Expiration period for unrecognized deferred tax assets (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 USD ($)
IFRS Statement [Line Items] |
Unrecognized deferred tax assets | $ 49,555
Taiwan [Member] | Expiration Year 2021 To 2025 [Member] |
IFRS Statement [Line Items] |
Deductible amount | 102,259
Unrecognized deferred tax assets | $ 20,452
Expiration year | 2021~2025
Taiwan [Member] | Expiration Year 2026 To 2030 [Member] |
IFRS Statement [Line Items] |
Deductible amount | $ 108,708
Unrecognized deferred tax assets | $ 21,742
Expiration year | 2026~2030
Hong Kong [Member] |
IFRS Statement [Line Items] |
Deductible amount | $ 1,828
Unrecognized deferred tax assets | $ 151
Expiration year | Indefinitely
U.S. [Member] | Expiration Year 2024 To 2040 [Member] |
IFRS Statement [Line Items] |
Deductible amount | $ 12,458
Unrecognized deferred tax assets | $ 3,503
Expiration year | 2024~2040
Israel [Member] |
IFRS Statement [Line Items] |
Deductible amount | $ 16,118
Unrecognized deferred tax assets | $ 3,707
Expiration year | Indefinitely

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