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Equity (Details 1)
12 Months Ended
Dec. 31, 2018
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Options outstanding | shares 220,767
Weighted average remaining contractual life (years) 3 years 9 months 22 days
Weighted average exercise price | $ / shares $ 3.83
Options exercisable | shares 190,767
Weighted average exercise price of exercisable options | $ / shares $ 4.43
0-1 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Options outstanding | shares 30,000
Weighted average remaining contractual life (years) 9 years 5 months 27 days
Weighted average exercise price | $ / shares
Options exercisable | shares
Weighted average exercise price of exercisable options | $ / shares
2.01-3 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Options outstanding | shares 66,000
Weighted average remaining contractual life (years) 1 year 3 months 4 days
Weighted average exercise price | $ / shares $ 2.32
Options exercisable | shares 66,000
Weighted average exercise price of exercisable options | $ / shares $ 2.32
3.01-4 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Options outstanding | shares 73,517
Weighted average remaining contractual life (years) 2 years 9 months 7 days
Weighted average exercise price | $ / shares $ 4.00
Options exercisable | shares 73,517
Weighted average exercise price of exercisable options | $ / shares $ 4.00
5.01-6 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Options outstanding | shares 6,250
Weighted average remaining contractual life (years) 4 years 7 months 10 days
Weighted average exercise price | $ / shares $ 6.00
Options exercisable | shares 6,250
Weighted average exercise price of exercisable options | $ / shares $ 6.00
8.01-9 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Options outstanding | shares 45,000
Weighted average remaining contractual life (years) 5 years 4 months 6 days
Weighted average exercise price | $ / shares $ 8.01
Options exercisable | shares 45,000
Weighted average exercise price of exercisable options | $ / shares $ 8.01