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Shareholders' Equity (Details 2) - Stock Option [Member]
12 Months Ended
Dec. 31, 2015
$ / shares
shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options outstanding 238,894
Weighted average remaining contractual life (years) 3 years 5 months 12 days
Options exercisable 88,766
Weighted average Remaining Contractual life of options exercisable (years) 2 years 5 months 9 days
2.237 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price | $ / shares $ 2.237
Options outstanding 26,625
Weighted average remaining contractual life (years) 4 years 9 months 22 days
Options exercisable
Weighted average Remaining Contractual life of options exercisable (years) 0 years
2.96 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price | $ / shares $ 2.96
Options outstanding 83,000
Weighted average remaining contractual life (years) 4 years 3 months 18 days
Options exercisable
Weighted average Remaining Contractual life of options exercisable (years) 0 years
3.23 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price | $ / shares $ 3.23
Options outstanding 375
Weighted average remaining contractual life (years) 1 year 1 month 21 days
Options exercisable 375
Weighted average Remaining Contractual life of options exercisable (years) 1 year 1 month 21 days
3.40 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price | $ / shares $ 3.40
Options outstanding 375
Weighted average remaining contractual life (years) 11 months 19 days
Options exercisable 375
Weighted average Remaining Contractual life of options exercisable (years) 11 months 19 days
3.88 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price | $ / shares $ 3.88
Options outstanding 375
Weighted average remaining contractual life (years) 3 years 10 months 17 days
Options exercisable 125
Weighted average Remaining Contractual life of options exercisable (years) 3 years 10 months 17 days
3.88 One [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price | $ / shares $ 3.88
Options outstanding 90,000
Weighted average remaining contractual life (years) 2 years 10 months 6 days
Options exercisable 59,999
Weighted average Remaining Contractual life of options exercisable (years) 2 years 10 months 6 days
4.02 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price | $ / shares $ 4.02
Options outstanding 5,000
Weighted average remaining contractual life (years) 3 years 6 months 18 days
Options exercisable 1,666
Weighted average Remaining Contractual life of options exercisable (years) 3 years 6 months 18 days
6.67 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price | $ / shares $ 6.67
Options outstanding 10,000
Weighted average remaining contractual life (years) 3 years 3 months 11 days
Options exercisable 3,332
Weighted average Remaining Contractual life of options exercisable (years) 3 years 3 months 11 days
6.67 One [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price | $ / shares $ 6.67
Options outstanding 375
Weighted average remaining contractual life (years) 3 years 3 months 11 days
Options exercisable 125
Weighted average Remaining Contractual life of options exercisable (years) 3 years 3 months 11 days
8.00 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price | $ / shares $ 8.00
Options outstanding 5,749
Weighted average remaining contractual life (years) 3 months
Options exercisable 5,749
Weighted average Remaining Contractual life of options exercisable (years) 3 months
33.60 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price | $ / shares $ 33.60
Options outstanding 3,750
Weighted average remaining contractual life (years) 2 years 2 months 27 days
Options exercisable 3,750
Weighted average Remaining Contractual life of options exercisable (years) 2 years 2 months 27 days
50.40 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price | $ / shares $ 50.40
Options outstanding 13,170
Weighted average remaining contractual life (years) 1 year 3 months 22 days
Options exercisable 13,170
Weighted average Remaining Contractual life of options exercisable (years) 1 year 3 months 22 days
60.00 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price | $ / shares $ 60.00
Options outstanding 100
Weighted average remaining contractual life (years) 2 months 27 days
Options exercisable 100
Weighted average Remaining Contractual life of options exercisable (years) 2 months 27 days