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Stockholders' Equity (Details) - Employee Stock Option [Member] - $ / shares
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of Shares, Balance at beginning of the period (in shares) 1,528,737  
Number of Shares, Options granted (in shares) 301,500 337,689
Number of Shares, Options exercised (in shares) (98,574)  
Number of Shares, Options forfeited (in shares) (8,555)  
Number of Shares, Options cancelled (in shares) (556)  
Number of Shares, Balance at end of the period (in shares) 1,722,552 1,528,737
Number of Shares, Options exercisable (in shares) 1,238,423  
Weighted average exercise price, Balance at beginning of the period (in dollars per share) $ 4.20  
Weighted average exercise price, Options granted (in dollars per share) 9.60  
Weighted average exercise price, Options exercised (in dollars per share) 2.81  
Weighted average exercise price, Options forfeited (in dollars per share) 6.29  
Weighted average exercise price, Options cancelled (in dollars per share) 18.34  
Weighted average exercise price, Balance at end of the period (in dollars per share) 5.21 $ 4.20
Weighted average exercise price, Options exercisable (in dollars per share) $ 3.72