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Himax Technologies, Inc. (the Parent Company only) - Condensed Statements of Profit or Loss (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
IFRS Statement [Line Items] |  |  |
Revenues | $ 887,282 | $ 671,835 | $ 723,605
Costs and expenses | 829,356 | 690,142 | 720,220
Operating loss | 57,926 | (18,307) | 3,385
Interest income | 967 | 2,013 | 2,429
Changes in fair value of financial assets at fair value through profit or loss | 472 | 3,746 | 2,036
Foreign currency exchange gains (losses), net | (327) | (546) | (369)
Finance costs | (1,705) | (2,325) | (1,232)
Profit (loss) before income taxes | 56,872 | (15,768) | 7,020
Income tax expense | 11,712 | 416 | 994
Profit (loss) for the year | 45,160 | (16,184) | 6,026
Equity attributable to owners of parent [member] |  |  |
IFRS Statement [Line Items] |  |  |
Revenues | 0 | 0 | 0
Costs and expenses | 704 | 1,206 | 273
Operating loss | (704) | (1,206) | (273)
Interest income | 126 | 162 | 200
Changes in fair value of financial assets at fair value through profit or loss | 427 | 3,755 | 2,094
Foreign currency exchange gains (losses), net | 356 | (69) | (257)
Finance costs | (3,629) | (4,165) | (3,491)
Share of profits (loss) of subsidiaries and affiliates | 50,558 | (12,091) | 10,296
Profit (loss) before income taxes | 47,134 | (13,614) | 8,569
Income tax expense | 0 | 0 | 0
Profit (loss) for the year | $ 47,134 | $ (13,614) | $ 8,569

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