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Stock Transactions (Schedule Of Assumptions Used In Valuing The Stock Options) (Details) - Options [Member]
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Assumptions - Binomial Lattice (Suboptimal) Option Pricing Model:    
Expected volatility of stock 500.00% 500.00%
Expected dividend yield 0.00% 0.00%
Suboptimal Exercise Behavior Multiple 2.0 2.0
Number of Steps 150 150
Minimum [Member]    
Assumptions - Binomial Lattice (Suboptimal) Option Pricing Model:    
Risk free interest rate 0.21% 1.53%
Expected term 5 years 5 years
Maximum [Member]    
Assumptions - Binomial Lattice (Suboptimal) Option Pricing Model:    
Risk free interest rate 0.55% 1.73%
Expected term 10 years 10 years