Accounts Receivable, net - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts Receivable, net
Loss Allowance Accounts Receivable Ending Balance	$ 190	$ 190	$ 290
Charges to Earnings Accounts Receivable	$ 0	67	$ 290
Gross carrying amount not reasonably expected to be recovered		$ 190

Represents amount of loss allowance in accordance with trade and other receivable

No definition available.

Name:	himx_LossAllowanceTradeAndOtherReceivableEndingBalance
Namespace Prefix:	himx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant