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CONSOLIDATED STATEMENTS OF CASH FLOWS - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Cash flows from operating activities      
Cash generated from operations ₩ 81,735 ₩ 37,220 ₩ 42,571
Interest received 1,122 1,605 680
Interest paid (186) (277)  
Income taxes paid (12,815) (12,177) (7,279)
Net cash inflow from operating activities 69,856 26,371 35,972
Cash flows from investing activities      
Decrease(Increase) in short‑term financial instruments (31,500) (30,000) 13,000
Decrease(Increase) in other non-current financial assets (856) (274)  
Decrease(Increase) in other current assets     3
Proceeds from disposal of property and equipment 3 71 69
Proceeds from disposal of intangible assets   20  
Purchase of property and equipment (1,071) (983) (1,141)
Purchase of intangible assets (2,625) (1,360) (1,108)
Net cash inflow(outflow) in investing activities (36,049) (32,526) 10,823
Cash flows from financing activities      
Proceeds from capital contribution from non-controlling interests 362 359  
Repayment of lease liabilities (2,893) (2,034) (197)
Payment of share issuance cost (16) (11)  
Net cash outflow in financing activities (2,547) (1,686) (197)
Effect of exchange rate changes on cash and cash equivalents (56) 1,218 358
Net increase (decrease) in cash and cash equivalents 31,204 (6,623) 46,956
Cash and cash equivalents at beginning of the year 79,428 86,051 39,095
Cash and cash equivalents at end of the year ₩ 110,632 ₩ 79,428 ₩ 86,051