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Equity (Details 2)
12 Months Ended
Dec. 31, 2018
$ / shares
shares
Option Indexed to Issuer's Equity [Line Items]  
Outstanding options, Number 881,867
Exercisable options, Number 855,667
Stock Option Two [Member]  
Option Indexed to Issuer's Equity [Line Items]  
Outstanding options, Average exercise price | $ / shares $ 2.30
Outstanding options, Number 94,000
Outstanding options, Average remaining contractual life (years) 3 years
Exercisable options, Average exercise price | $ / shares $ 2.30
Exercisable options, Number 94,000
Exercisable options, Average remaining contractual life (years) 3 years
Stock Option Three [Member]  
Option Indexed to Issuer's Equity [Line Items]  
Outstanding options, Average exercise price | $ / shares $ 5.31
Outstanding options, Number 131,000
Outstanding options, Average remaining contractual life (years) 4 years 9 months 7 days
Exercisable options, Average exercise price | $ / shares $ 5.31
Exercisable options, Number 104,800
Exercisable options, Average remaining contractual life (years) 4 years 9 months 7 days
Stock Option Four [Member]  
Option Indexed to Issuer's Equity [Line Items]  
Outstanding options, Average exercise price | $ / shares $ 1.64
Outstanding options, Number 159,000
Outstanding options, Average remaining contractual life (years) 5 years 7 months 21 days
Exercisable options, Average exercise price | $ / shares $ 1.64
Exercisable options, Number 159,000
Exercisable options, Average remaining contractual life (years) 5 years 7 months 21 days
Stock Option Five [Member]  
Option Indexed to Issuer's Equity [Line Items]  
Outstanding options, Average exercise price | $ / shares $ 1.88
Outstanding options, Number 390,867
Outstanding options, Average remaining contractual life (years) 6 years 7 months 6 days
Exercisable options, Average exercise price | $ / shares $ 1.88
Exercisable options, Number 390,867
Exercisable options, Average remaining contractual life (years) 6 years 7 months 6 days
Stock Option One [Member]  
Option Indexed to Issuer's Equity [Line Items]  
Outstanding options, Average exercise price | $ / shares $ 1.45
Outstanding options, Number 107,000
Outstanding options, Average remaining contractual life (years) 7 years 2 months 19 days
Exercisable options, Average exercise price | $ / shares $ 1.45
Exercisable options, Number 107,000
Exercisable options, Average remaining contractual life (years) 7 years 2 months 19 days