Quarterly report pursuant to Section 13 or 15(d)

NOTES PAYABLE (Details 5)

v3.21.2
NOTES PAYABLE (Details 5) - Valuation Technique Binomial Monte-Carlo Cliquet Option Pricing Model [Member]
12 Months Ended
Dec. 31, 2020
$ / shares
Jun. 30, 2021
₩ / shares
Dec. 31, 2020
₩ / shares
Debt Instrument [Line Items]      
Stock price | (per share) $ 1.23 ₩ 4,580 ₩ 6,060
Conversion price $ 2.00    
Selected Yield [Member]      
Debt Instrument [Line Items]      
Selected yield 10.48   10.48
Expected Volatility (Telcon common stock) [Member]      
Debt Instrument [Line Items]      
Selected yield 95   95
Expected Life (in years) [Member]      
Debt Instrument [Line Items]      
Expected life (in years) 8 months 1 day   8 months 1 day
Risk-free Interest Rate (South Korea government bond) [Member]      
Debt Instrument [Line Items]      
Risk-free rate Term structure