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Capital management (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | --- | ---
Capital management |  |  |  |
Total liabilities | $ 424,619 | $ 387,237 |  |
Less: cash and cash equivalents | 184,938 | 101,055 | $ 106,437 | $ 138,023
Total liabilities less current assets | 239,681 | 286,182 |  |
Equity attributable to owners of Himax Technologies, Inc. | $ 480,176 | $ 432,987 |  |

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