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Shareholders' Equity (Options Outstanding and Exercisable) (Details) - $ / shares
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
$1.00 - $7.99 [Member]    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Range of exercise prices - lower range (in dollars per share) $ 1.00  
Range of exercise prices - upper range (in dollars per share) $ 7.99  
Options outstanding, number of shares   47,419
Options outstanding, weighted average remaining contractual life 7 years 3 months 15 days  
Options outstanding, weighted average exercise price (in usd per share)   $ 7.86
Options exercisable, number of shares   23,588
Options exercisable, weighted average remaining contractual life 7 years 3 months 15 days  
Options exercisable, weighted average exercise price (in usd per share)   $ 7.86
$8.00 - $15.99 [Member]    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Range of exercise prices - lower range (in dollars per share) $ 8  
Range of exercise prices - upper range (in dollars per share) $ 15.99  
Options outstanding, number of shares   96,067
Options outstanding, weighted average remaining contractual life 8 years 11 months 27 days  
Options outstanding, weighted average exercise price (in usd per share)   $ 10.58
Options exercisable, number of shares   7,832
Options exercisable, weighted average remaining contractual life 8 years 4 months 13 days  
Options exercisable, weighted average exercise price (in usd per share)   $ 9.92
$16.00 - $16.99 [Member]    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Range of exercise prices - lower range (in dollars per share) $ 16  
Range of exercise prices - upper range (in dollars per share) $ 16.99  
Options outstanding, number of shares   438,788
Options outstanding, weighted average remaining contractual life 9 years 2 months 1 day  
Options outstanding, weighted average exercise price (in usd per share)   $ 16.00
Options exercisable, number of shares   36,563
Options exercisable, weighted average remaining contractual life 8 years 9 months  
Options exercisable, weighted average exercise price (in usd per share)   $ 16.00
$1,590.00 - $1,800.00 [Member]    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Range of exercise prices - lower range (in dollars per share) $ 1,590  
Range of exercise prices - upper range (in dollars per share) $ 1,800  
Options outstanding, number of shares   40
Options outstanding, weighted average remaining contractual life 1 year 4 months 13 days  
Options outstanding, weighted average exercise price (in usd per share)   $ 1,668.75
Options exercisable, number of shares   40
Options exercisable, weighted average remaining contractual life 1 year 8 months 19 days  
Options exercisable, weighted average exercise price (in usd per share)   $ 1,668.75