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Material accounting policies - Calculation of diluted earnings per ordinary share based on treasury stock method (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Material accounting policies |  |  |
Profits attributable to Himax Technologies, Inc. stockholders | $ 50,616 | $ 236,982 | $ 436,896
Denominator for diluted earnings per ordinary share: |  |  |
Weighted average number of ordinary shares outstanding | 348,990 | 349,448 | 349,228
Unvested RSUs | 576 | 187 | 38
Employee stock options | 0 | 0 | 467
Adjusted weighted average number of ordinary shares outstanding | 349,566 | 349,635 | 349,733
Diluted earnings per ordinary share attributable to Himax Technologies, Inc. stockholders | $ 0.14 | $ 0.68 | $ 1.25
Diluted earnings per ADS attributable to Himax Technologies, Inc. stockholders | $ 0.29 | $ 1.36 | $ 2.50
Weighted Average Basic Number of ADS Equivalent Outstanding | 174,495 | 174,724 | 174,614
Weighted Average Diluted Number of ADS Equivalent Outstanding | 174,783 | 174,817 | 174,867

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- Definition The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2023-01-01 -Paragraph 70 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2023-en-r&anchor=para_70_b&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator), divided by the weighted average number of ordinary shares outstanding during the period (the denominator), both adjusted for the effects of all dilutive potential ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2023-01-01 -Paragraph 66 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2023-en-r&anchor=para_66&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2023-01-01 -Paragraph 67 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2023-en-r&anchor=para_67&doctype=Standard -URIDate 2023-03-23 + Details
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