Earnings per Share - Schedule of Components of Basic Earnings Per Share (Details) - KRW (₩) ₩ / shares in Units, ₩ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Basic earnings per share [abstract]
Profit attributable to owners of the Parent	₩ 65,947	₩ 62,703	₩ 39,876
Weighted average outstanding shares of common shares (in shares)	6,948,900	6,948,900	6,948,900
Basic earnings per share (in korean won per share)	₩ 9,490	₩ 9,023	₩ 5,738

The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator) divided by the weighted average number of ordinary shares outstanding during the period (the denominator).

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The profit (loss) attributable to ordinary equity holders of the parent entity. [Refer: Profit (loss)]

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The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor.

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