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Statements of Cash Flows - Summary of Cash Generated From Operations (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure Of Cash Flow Statement [Abstract] |  |  |
Profit for the year | ₩ 131,982 | ₩ 83,058 | ₩ 65,880
Depreciation expense | 5,252 | 5,145 | 4,570
Amortization expense | 2,406 | 1,917 | 1,748
Bad debt expenses | 1,402 | 701 | 933
Unrealized foreign currency loss | 1,595 | 1,311 | 211
Interest expense | 162 | 127 | 115
Loss on disposal of property and equipment | 0 | 0 | 57
Impairment loss on intangible assets | 1,531 | 293 | 281
Impairment loss on other non-current assets | 0 | 177 | 1,087
Post-employment benefit expense | 23 | 66 | 23
Income tax expense | 36,717 | 26,824 | 33,421
Unrealized foreign currency gain | (1,417) | (689) | (134)
Interest income | (11,492) | (4,501) | (1,383)
Gain on disposal of property and equipment | (20) | (15) | (7)
Reversal of allowance for doubtful accounts | 0 | 0 | (132)
Others | 6 | 6 | (214)
Change in accounts receivable | 2,365 | (38,199) | 5,530
Change in other receivables | (3,770) | 899 | (1,082)
Change in prepaid expenses | 397 | (104) | (3,296)
Change in prepayment | (1) | (1,641) | 2,165
Change in other current assets | (696) | 34 | 243
Change in other non-current assets | (3,486) | 218 | 144
Change in accounts payable | (13,837) | 43,900 | (8,512)
Change in deferred revenue | (1,292) | 4,915 | 1,185
Change in withholdings | (262) | (631) | 686
Change in accrued expenses | 255 | 547 | 118
Change in other current liabilities | 165 | 301 | 34
Change in other non-current liabilities | 2,247 | 15 | (99)
Total | ₩ 150,232 | ₩ 124,674 | ₩ 103,572

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