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Share-Based Compensation - Valuation assumptions (Details) | 12 Months Ended
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Dec. 31, 2020
Stock Option 2019 Plan [Member] |
Valuation assumptions: |
Expected dividend yield | 3.50%
Stock Option 2019 Plan [Member] | Minimum [Member] |
Valuation assumptions: |
Expected volatility | 51.96%
Expected term (years) | 1 year
Risk-free interest rate | 1.69%
Stock Option 2019 Plan [Member] | Maximum [Member] |
Valuation assumptions: |
Expected volatility | 57.79%
Expected term (years) | 1 year 6 months
Risk-free interest rate | 1.75%
Imaging Cayman [Member] | Stock Option 2016 Plan [Member] |
Valuation assumptions: |
Expected dividend yield | 0.00%
Expected volatility | 38.04%
Expected term (years) | 3 years 1 month 15 days
Risk-free interest rate | 0.50%
Imaging Taiwan [Member] | Stock Option 2016 Plan [Member] |
Valuation assumptions: |
Expected dividend yield | 0.00%
Expected volatility | 38.04%
Expected term (years) | 3 years 1 month 15 days
Risk-free interest rate | 0.50%
Himax Display [Member] | Stock Option 2015 Plan [Member] |
Valuation assumptions: |
Expected dividend yield | 0.00%
Expected volatility | 33.52%
Expected term (years) | 3 years 1 month 15 days
Risk-free interest rate | 0.65%

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- Definition The expected volatility of the share price used to calculate the fair value of the share options granted. Expected volatility is a measure of the amount by which a price is expected to fluctuate during a period. The measure of volatility used in option pricing models is the annualised standard deviation of the continuously compounded rates of return on the share over a period of time. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2020-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_47_a_i&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The implied yield currently available on zero-coupon government issues of the country in whose currency the exercise price for share options granted is expressed, with a remaining term equal to the expected term of the option being valued (based on the option's remaining contractual life and taking into account the effects of expected early exercise). [Refer: Government [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2020-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_47_a_i&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The percentage of an expected dividend used to calculate the fair value of share options granted. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2020-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_47_a_i&doctype=Standard -URIDate 2020-01-01 + Details
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