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Significant accounting policies - Additional information (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021
Statement [line items] |  |
Plant And Equipment Useful Life | 3 years |
Driver IC CGU |  |
Statement [line items] |  |
Annual discount rate | 11.98% | 8.05%
WLO CGU |  |
Statement [line items] |  |
Annual discount rate | 15.34% | 13.33%
Growth rate used to extrapolate cash flow projections | 2.18% | 2.46%
Period for average Taiwan economic growth rate | 5 years |
CMOS CGU |  |
Statement [line items] |  |
Annual discount rate |  | 11.40%
Technology |  |
Statement [line items] |  |
Assets Acquired Useful Life | 7 years |
Patent | Bottom of range |  |
Statement [line items] |  |
Assets Acquired Useful Life | 12 years |
Patent | Top of range |  |
Statement [line items] |  |
Assets Acquired Useful Life | 15 years |
Intellectual Properties |  |
Statement [line items] |  |
Assets Acquired Useful Life | 10 years |
Himax semi conductor |  |
Statement [line items] |  |
Goodwill recognised as of acquisition date | $ 26,846 |
Himax Display (USA) Inc. |  |
Statement [line items] |  |
Goodwill recognised as of acquisition date | $ 1,292 |
Buildings |  |
Statement [line items] |  |
Useful Life Of Tangible Assets | 25 years |
Building and improvements | Bottom of range |  |
Statement [line items] |  |
Useful Life Of Tangible Assets | 4 years |
Building and improvements | Top of range |  |
Statement [line items] |  |
Useful Life Of Tangible Assets | 16 years |
Machinery | Bottom of range |  |
Statement [line items] |  |
Useful Life Of Tangible Assets | 4 years |
Machinery | Top of range |  |
Statement [line items] |  |
Useful Life Of Tangible Assets | 10 years |
Research and development equipment | Bottom of range |  |
Statement [line items] |  |
Useful Life Of Tangible Assets | 2 years |
Research and development equipment | Top of range |  |
Statement [line items] |  |
Useful Life Of Tangible Assets | 6 years |
Office furniture and equipment [Member] | Bottom of range |  |
Statement [line items] |  |
Useful Life Of Tangible Assets | 3 years |
Office furniture and equipment [Member] | Top of range |  |
Statement [line items] |  |
Useful Life Of Tangible Assets | 8 years |
Other property, plant and equipment [member] | Bottom of range |  |
Statement [line items] |  |
Useful Life Of Tangible Assets | 2 years |
Other property, plant and equipment [member] | Top of range |  |
Statement [line items] |  |
Useful Life Of Tangible Assets | 10 years |
Software |  |
Statement [line items] |  |
Growth rate used to extrapolate cash flow projections |  | 2.46%
Period for average Taiwan economic growth rate | 5 years |
Software | Bottom of range |  |
Statement [line items] |  |
Assets Acquired Useful Life | 2 years |
Useful Life Of Tangible Assets | 2 years |
Software | Top of range |  |
Statement [line items] |  |
Assets Acquired Useful Life | 10 years |
Useful Life Of Tangible Assets | 10 years |

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