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Shareholders' Equity (Details 2)
12 Months Ended
Dec. 31, 2019
$ / shares
shares
0.003 [Member]  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Range of exercise prices (Lower Range Limit) $ 0.003
Options Outstanding, Number outstanding at December 31, 2 0 1 9 | shares 320,000
Options Outstanding, Weighted average remaining contractual life (Year) 3 years 7 months 24 days
Options Outstanding, Weighted average exercise price $ 0.003
Options Exercisable, Number exercisable at December 31, 2 0 1 9 | shares 14,000
Options Exercisable, Weighted average remaining contractual life (Years) 2 years
Options Exercisable, Weighted average exercise price $ 0.003
2.425 – 2.688 [Member]  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Range of exercise prices (Lower Range Limit) 2.425
Range of exercise prices (Upper Range Limit) $ 2.688
Options Outstanding, Number outstanding at December 31, 2 0 1 9 | shares 32,000
Options Outstanding, Weighted average remaining contractual life (Year) 1 year 10 months 25 days
Options Outstanding, Weighted average exercise price $ 2.49
Options Exercisable, Number exercisable at December 31, 2 0 1 9 | shares 20,000
Options Exercisable, Weighted average remaining contractual life (Years) 1 year 7 months 21 days
Options Exercisable, Weighted average exercise price $ 2.53