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Property and Equipment - Summary of Property Plant and Equipment (Details) - KRW (₩) ₩ in Millions | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | --- | ---
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |
Property and equipment, net | ₩ 7,695 | ₩ 6,663 | ₩ 1,498 | ₩ 946
Right-of-use Assets |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |
Property and equipment, net | 5,737 | 4,946 |  |
Computer and Other Equipment |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |
Property and equipment, net | 1,380 | 1,057 | 888 | 654
Furniture and Fixtures |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |
Property and equipment, net | 310 | 443 | 484 | 165
Construction in Progress |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |
Property and equipment, net | 128 |  |  |
Leasehold Improvements |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |
Property and equipment, net | 132 | 217 | ₩ 126 | ₩ 127
Vehicles |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |
Property and equipment, net | 8 |  |  |
Accumulated Depreciation |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |
Property and equipment, net | (13,214) | (10,910) |  |
Accumulated Depreciation | Right-of-use Assets |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |
Property and equipment, net | (5,763) | (3,681) |  |
Accumulated Depreciation | Computer and Other Equipment |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |
Property and equipment, net | (4,694) | (4,614) |  |
Accumulated Depreciation | Furniture and Fixtures |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |
Property and equipment, net | (1,728) | (1,541) |  |
Accumulated Depreciation | Leasehold Improvements |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |
Property and equipment, net | (1,028) | (1,074) |  |
Accumulated Depreciation | Vehicles |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |
Property and equipment, net | (1) |  |  |
Acquisition Price |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |
Property and equipment, net | 20,909 | 17,573 |  |
Acquisition Price | Right-of-use Assets |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |
Property and equipment, net | 11,500 | 8,627 |  |
Acquisition Price | Computer and Other Equipment |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |
Property and equipment, net | 6,074 | 5,671 |  |
Acquisition Price | Furniture and Fixtures |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |
Property and equipment, net | 2,038 | 1,984 |  |
Acquisition Price | Construction in Progress |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |
Property and equipment, net | 128 |  |  |
Acquisition Price | Leasehold Improvements |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |
Property and equipment, net | 1,160 | ₩ 1,291 |  |
Acquisition Price | Vehicles |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |
Property and equipment, net | ₩ 9 |  |  |

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- Definition The amount of tangible assets that: (a) are held for use in the production or supply of goods or services, for rental to others, or for administrative purposes; and (b) are expected to be used during more than one period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2020-01-01 -Paragraph 73 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2020-en-r&anchor=para_73_e&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 54 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_a&doctype=Standard -URIDate 2020-01-01 + Details
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