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Statements of Cash Flows - Summary of Cash Generated From Operations (Details) - KRW (₩)
₩ in Millions
 12 Months Ended
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