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Segment Information - Summary Revenue from External Customers by Country (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure of geographical areas [line items] |  |  |
Revenue | ₩ 725,516 | ₩ 463,618 | ₩ 413,938
Korea |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 86,058 | 46,719 | 73,751
Taiwan |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 176,071 | 175,664 | 77,462
Japan |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 18,999 | 26,133 | 40,259
The United States of America |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 22,702 | 33,697 | 20,894
Thailand |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 136,874 | 75,498 | 94,475
The Philippines |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 102,595 | 26,003 | 20,173
Indonesia |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 58,763 | 5,472 | 10,723
Hong Kong |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 22,656 | 24,397 | 7,648
Malaysia |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 58,553 | 24,830 | 30,422
Others |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | ₩ 42,245 | ₩ 25,205 | ₩ 38,131

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- Definition The amount of revenue from contracts with customers. A customer is a party that has contracted with an entity to obtain goods or services that are an output of the entity’s ordinary activities in exchange for consideration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2023-01-01 -Paragraph 114 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2023-en-r&anchor=para_114&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2023-01-01 -Paragraph 113 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2023-en-r&anchor=para_113_a&doctype=Standard -URIDate 2023-03-23 + Details
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