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Share-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2020
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items] |
Schedule of share-based compensation expenses | The amounts of share-based compensation expenses included in applicable costs of sales and expense categories and related tax effects are summarized as follows:
|  | Year ended December 31,
|  | 2018 |  | 2019 |  | 2020
|  | (in thousands)
Cost of revenues |  | $ | 90 |  | 9 |  | 87
Research and development |  |  | 3,165 |  | 339 |  | 4,467
General and administrative |  |  | 387 |  | 50 |  | 368
Sales and marketing |  |  | 544 |  | 59 |  | 603
Total compensation recognized in income |  | $ | 4,186 |  | 457 |  | 5,525
Income tax benefit |  | $ | 894 |  | 89 |  | 1,176
Schedule of RSUs activity under the long-term incentive plan | RSUs activity under the long-term incentive plan during the periods indicated is as follows:
|  | Number of |  | Weighted
|  | Underlying |  | Average Grant
|  | Shares for RSUs |  | Date Fair Value
Balance at January 1, 2018 |  | 92,600 |  | $ | 8.77
Granted |  | 676,273 |  |  | 5.76
Vested |  | (698,427) |  |  | 5.92
Forfeited |  | (10,108) |  |  | 8.55
Balance at December 31, 2018 |  | 60,338 |  |  | 7.98
Vested |  | (38,878) |  |  | 8.29
Forfeited |  | (2,967) |  |  | 7.98
Balance at December 31, 2019 |  | 18,493 |  |  | 7.34
Granted |  | 1,402,714 |  |  | 3.44
Vested |  | (1,392,355) |  |  | 3.47
Forfeited |  | (5,963) |  |  | 6.57
Balance at December 31, 2020 |  | 22,889 |  |  | 3.88
Schedule of allocation of compensation expenses and related tax effects from the RSUs granted to employees under the long-term incentive plan | The allocation of compensation expenses and related tax effects from the RSUs granted to employees under the long-term incentive plan are summarized as follows:
|  | Year ended December 31,
|  | 2018 |  | 2019 |  | 2020
|  | (in thousands)
Cost of revenues |  | $ | 56 |  | - |  | 70
Research and development |  |  | 3,104 |  | 86 |  | 3,924
General and administrative |  |  | 373 |  | 26 |  | 319
Sales and marketing |  |  | 538 |  | 19 |  | 520
Total compensation recognized in income |  | $ | 4,071 |  | 131 |  | 4,833
Income tax benefit |  | $ | 894 |  | 30 |  | 1,044
Schedule of valuation assumptions | The risk-free rates for the expected term of the options are based on the interest rates of 1 years and 1.5 years U.S. Treasury yield at the time of grant.
|  | 2019 plan |
Valuation assumptions: |  |  |
Expected dividend yield |  | 3.5 | %
Expected volatility |  | 51.96%-57.79 | %
Expected term (years) |  | 1-1.5 |
Risk-free interest rate |  | 1.69%-1.75 | %
Schedule of stock option activity | Stock option activity during the periods indicated is as follows:
|  |  |  |  |  | Weighted
|  |  |  | Weighted |  | average
|  |  |  | average |  | remaining
|  | Number |  | exercise |  | contractual
|  | of Units |  | price |  | term
Granted |  | 2,226,690 |  | $ | 2.27 |  | 1.75
Exercised |  | - |  |  | - |  |
Forfeited |  | - |  |  | - |  |
Balance at December 31, 2019 |  | 2,226,690 |  |  | 2.27 |  | 1.5
Granted |  | 163,500 |  |  | 3.05 |  | 0.88
Exercised |  | (1,574,869) |  |  | 2.32 |  |
Forfeited |  | (236,853) |  |  | 2.30 |  |
Balance at December 31, 2020 |  | 578,468 |  |  | 2.36 |  | 0.54
Exercisable at December 31, 2020 |  | 578,468 |  |  | 2.36 |  | 0.54
Himax Imaging [Member] |
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items] |
Schedule of valuation assumptions |
|  | 2016 plan |
Valuation assumptions: |  |  |
Expected dividend yield |  | 0 | %
Expected volatility |  | 38.04 | %
Expected term (years) |  | 3.125 |
Risk-free interest rate |  | 0.50 | %
Schedule of stock option activity | Stock option activity during the periods indicated is as follows:
|  |  |  |  |  |  | Weighted
|  |  |  | Weighted |  | average
|  |  |  | average |  | remaining
|  | Number |  | exercise |  | contractual
|  | of shares |  | price |  | term
Balance at January 1, 2018 |  | 581,000 |  | $ | 0.9139 |  | 2.0
Granted |  | - |  |  | - |  |
Exercised |  | - |  |  | - |  |
Forfeited |  | (35,000) |  |  | 0.9139 |  |
Balance at December 31, 2018 |  | 546,000 |  |  | 0.9139 |  | 1.0
Granted |  | - |  |  | - |  |
Exercised |  | - |  |  | - |  |
Forfeited |  | (25,000) |  |  | 0.9139 |  |
Expired |  | (521,000) |  |  | 0.9139 |  |
Balance at December 31, 2019 |  | - |  |  | - |  | -
Exercisable at December 31, 2019 |  | - |  |  | - |  |
Imaging Taiwan [Member] |
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items] |
Schedule of valuation assumptions | The risk-free rates for the expected term of the options are based on the interest rates of 2 years and 5 years ROC central government bond at the time of grant.
|  | 2016 plan |
Valuation assumptions: |  |  |
Expected dividend yield |  | 0 | %
Expected volatility |  | 38.04 | %
Expected term (years) |  | 3.125 |
Risk-free interest rate |  | 0.50 | %
Schedule of stock option activity | Stock option activity during the periods indicated is as follows:
|  |  |  |  |  |  | Weighted
|  |  |  | Weighted |  | average
|  |  |  | average |  | remaining
|  | Number |  | exercise |  | contractual
|  | of shares |  | price |  | term
Balance at January 1, 2018 |  | 1,509,000 |  | $ | 0.9139 |  | 2.0
Granted |  | - |  |  | - |  |
Exercised |  | - |  |  | - |  |
Forfeited |  | (150,000) |  |  | 0.9139 |  |
Balance at December 31, 2018 |  | 1,359,000 |  |  | 0.9139 |  | 1.0
Granted |  | - |  |  | - |  |
Exercised |  | - |  |  | - |  |
Forfeited |  | (209,000) |  |  | 0.9139 |  |
Expired |  | (1,135,000) |  |  | 0.9139 |  |
Balance at December 31, 2019 |  | 15,000 |  |  | 0.9139 |  | -
Expired |  | (15,000) |  |  | 0.9139 |  |
Balance at December 31, 2020 |  | - |  |  | - |  | -
Exercisable at December 31, 2020 |  | - |  |  | - |  |
Himax Display [Member] |
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items] |
Schedule of valuation assumptions | The risk-free rate for the expected term of the options is based on the interest rates of 2 years and 5 years ROC central government bond at the time of grant.
|  | 2015 plan |
Valuation assumptions: |  |  |
Expected dividend yield |  | 0 | %
Expected volatility |  | 33.52 | %
Expected term (years) |  | 3.125 |
Risk-free interest rate |  | 0.65 | %
Schedule of stock option activity | Stock option activity during the periods indicated is as follows:
|  |  |  |  |  |  | Weighted
|  |  |  | Weighted |  | average
|  |  |  | average |  | remaining
|  | Number |  | exercise |  | contractual
|  | of shares |  | price |  | term
Balance at January 1, 2018 |  | 1,943,000 |  | $ | 1.986 |  | 1.75
Granted |  | - |  |  | - |  |
Exercised |  | - |  |  | - |  |
Forfeited |  | (32,000) |  |  | 1.986 |  |
Balance at December 31, 2018 |  | 1,911,000 |  |  | 1.986 |  | 0.75
Granted |  | - |  |  | - |  |
Exercised |  | - |  |  | - |  |
Forfeited |  | (22,200) |  |  | 1.986 |  |
Expired |  | (1,888,800) |  |  | 1.986 |  |
Balance at December 31, 2019 |  | - |  |  | - |  | -
Exercisable at December 31, 2019 |  | - |  |  | - |  |

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