Annual report pursuant to Section 13 and 15(d)

INVESTMENTS (Details 1)

v3.22.1
INVESTMENTS (Details 1)
₩ / shares in Units, ₩ in Billions
 12 Months Ended
Dec. 31, 2021
$ / shares
Dec. 31, 2020
$ / shares
Dec. 31, 2021
KRW (₩)
₩ / shares
Dec. 31, 2020
KRW (₩)
₩ / shares
Jun. 29, 2020
$ / shares
Schedule Of Investments [Line Items]          
Stock price         $ 1.67
Conversion Price [Member]          
Schedule Of Investments [Line Items]          
Conversion price $ 2.39 $ 5.54      
Valuation Technique Binomial Monte-Carlo Cliquet Option Pricing Model [Member]          
Schedule Of Investments [Line Items]          
Principal outstanding (South Korean won) | ₩     ₩ 30 ₩ 30  
Stock price | (per share)   1.23 ₩ 2,925 ₩ 6,060  
Conversion price   $ 2.00      
Valuation Technique Binomial Monte-Carlo Cliquet Option Pricing Model [Member] | Expected Life (in years) [Member]          
Schedule Of Investments [Line Items]          
Expected life (in years) 8 years 9 months 14 days 9 years 9 months 14 days      
Valuation Technique Binomial Monte-Carlo Cliquet Option Pricing Model [Member] | Selected Yield [Member]          
Schedule Of Investments [Line Items]          
Investment in convertible bonds, measurement input     10.50 10.50  
Valuation Technique Binomial Monte-Carlo Cliquet Option Pricing Model [Member] | Expected Volatility (Telcon common stock) [Member]          
Schedule Of Investments [Line Items]          
Investment in convertible bonds, measurement input     81.31 85.80  
Valuation Technique Binomial Monte-Carlo Cliquet Option Pricing Model [Member] | Risk-free Interest Rate (South Korea government bond) [Member]          
Schedule Of Investments [Line Items]          
Investment in convertible bonds, measurement input     2.19 1.72  
Valuation Technique Binomial Monte-Carlo Cliquet Option Pricing Model [Member] | Expected Dividend Yield [Member]          
Schedule Of Investments [Line Items]          
Investment in convertible bonds, measurement input     0.00 0.00  
Valuation Technique Binomial Monte-Carlo Cliquet Option Pricing Model [Member] | Conversion Price [Member]          
Schedule Of Investments [Line Items]          
Conversion price | ₩ / shares     ₩ 2,847 ₩ 6,028