Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation (Details 1)

v3.6.0.2
Stock-Based Compensation (Details 1) - Stock Option [Member] - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options, Beginning Balance 8,941,930 5,981,106 3,909,580  
Options, Granted 3,861,425 3,781,666 2,382,500  
Options, Exercised (445,334) (35,008) (6,583)  
Options, Expired (338,529) (483,332)    
Options, Forfeited (383,265) (302,502) (304,391)  
Options, Ending Balance 11,636,227 8,941,930 5,981,106 3,909,580
Options, Exercisable 6,193,649      
Weighted Average Exercise Price, Beginning Balance $ 2.14 $ 2.01 $ 1.78  
Weighted Average Exercise Price, Granted 0.98 2.37 2.36  
Weighted Average Exercise Price, Exercised 1.83 1.16 0.58  
Weighted Average Exercise Price, Expired 1.96 2.48    
Weighted Average Exercise Price, Forfeited 2.26 1.91 1.93  
Weighted Average Exercise Price, Ending Balance 1.77 $ 2.14 $ 2.01 $ 1.78
Weighted Average Exercise Price, Exercisable $ 2.02      
Weighted Average Remaining Contractual Life, Balance Outstanding 5 years 5 months 26 days 5 years 8 months 1 day 5 years 9 months 18 days 5 years 7 months 2 days
Weighted Average Remaining Contractual Life, Exercisable 4 years 5 months 26 days      
Aggregate Intrinsic Value, Beginning Balance $ 2,900,000 $ 685,000 $ 785,000  
Aggregate Intrinsic Value, Exercised 137,488 44,000 8,000  
Aggregate Intrinsic Value, Ending Balance 194,355 2,900,000 $ 685,000 $ 785,000
Aggregate Intrinsic Value, Exercisable 194,355      
Grant date fair value of options granted $ 3,091,000 $ 7,974,000    
Weighted average grant date fair value $ 0.8 $ 2.12