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Document and Entity Information
 12 Months Ended
Dec. 31, 2021
shares
Document Information [Line Items]  
Document Type 20-F
Document Registration Statement false
Document Annual Report true
Document Transition Report false
Document Shell Company Report false
Amendment Flag false
Document Period End Date Dec. 31, 2021
Document Fiscal Year Focus 2021
Document Fiscal Period Focus FY
Entity File Number 000-51847
Entity Registrant Name Himax Technologies, Inc.
Entity Incorporation, State or Country Code E9
Entity Address, Address Line One NO. 26, ZIH LIAN ROAD
Entity Address, Address Line Two SINSHIH DISTRICT
Entity Address, Postal Zip Code 74148
Entity Address, City or Town TAINAN CITY
Entity Address, Country TW
Entity Central Index Key 0001342338
Current Fiscal Year End Date --12-31
Entity Well-known Seasoned Issuer Yes
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Large Accelerated Filer
Trading Symbol HIMX
Entity Common Stock, Shares Outstanding 348,597,140
Document Accounting Standard International Financial Reporting Standards
Entity Shell Company false
Entity Emerging Growth Company false
Title of 12(b) Security Ordinary Shares, par value $0.3 per ordinary share
Security Exchange Name NASDAQ
ICFR Auditor Attestation Flag false
Auditor Name KPMG
Auditor Firm ID 1026
Auditor Location Hsinchu, Taiwan
Business Contact  
Document Information [Line Items]  
Entity Address, Address Line One No. 15, Zih Lian Road
Entity Address, Address Line Two Sinshih District
Entity Address, Postal Zip Code 74148
Entity Address, City or Town Tainan City
Entity Address, Country TW
Contact Personnel Name Jessica Pan
Contact Personnel Email Address jessica_pan@himax.com.tw