XML 34 R11.htm IDEA: XBRL DOCUMENT
v3.21.1

Cash and cash equivalents | 12 Months Ended
--- | ---
Dec. 31, 2020
Text block [abstract] |
Cash and cash equivalents |
6. | Cash and cash equivalents
|  | December 31, 2019 |  |  | December 31, 2020 |
|  | NT$000 |  |  | NT$000 |
Cash on hand and petty cash |  |  | 470 |  |  |  | 470 |
Checking accounts and demand deposits |  |  | 915,134 |  |  |  | 2,609,421 |
Time deposits |  |  | 3,788,480 |  |  |  | 1,503,760 |
|  |  | 4,704,084 |  |  |  | 4,113,651 |
| a) | The Group transacts with a variety of financial institutions all with high credit quality to disperse credit risk, so it expects that the probability of counterparty default is remote.
| b) | No cash and cash equivalents of the Group were pledged to others.

X
- Definition The disclosure of cash and cash equivalents. [Refer: Cash and cash equivalents] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_10_e&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_DisclosureOfCashAndCashEquivalentsExplanatory
Namespace Prefix: | ifrs-full_
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