XML 99 R76.htm IDEA: XBRL DOCUMENT v3.21.1

Other income (Tables)

12 Months Ended

Dec. 31, 2020

Text block [abstract]

Summary of Other income

		Year ended December 31,
		2018				2019				2020
		NT$000				NT$000				NT$000
Rental income			7,819				9,249				10,260
Dividend income			571				585				3,229
Grant income			—				925				7,668
			8,390				10,759				21,157

X

- Definition

Disclosure of detailed information about other non operating income expenses.

+ References

No definition available.

+ Details

Name:	imos_DisclosureOfDetailedInformationAboutOtherNonOperatingIncomeExpensesTextBlock
Namespace Prefix:	imos_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Text block [abstract]

+ References

No definition available.

+ Details

Name:	imos_TextBlockAbstract
Namespace Prefix:	imos_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration