Annual report pursuant to section 13 and 15(d)

Stock-based compensation (Narrative) (Details)

v2.4.0.8
Stock-based compensation (Narrative) (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Issuance of stock-based compensation $ 55,546   
Stock Options [Member]
   
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Authorized shares 4,773,992  
Expected life in years 6 years 6 months  
Dividend rate 0.00%  
Risk free interest rate 1.41%  
Volatility 32.00%  
Options granted, weighted-average grant date fair value $ 1.74  
Option vesting period 5 years  
Contractual term 10 years  
Unrecognized compensation cost related to unvested stock-based awards 2,612,144  
Unrecognized compensation cost, recognition period 4 years 10 months 24 days  
Stock Options [Member] | Restricted Stock [Member]
   
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Issuance of stock-based compensation $ 295,000  
Stock based compensation, options granted 59,000  
Stock Options [Member] | Segel [Member]
   
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Exercise price $ 5.00  
Stock based compensation, options granted 1,022,104  
Vesting rate 50.00%  
Option vesting terms 50% will vest based on the achievement of targeted annual milestones which have not yet been set by the board of directors  
Stock Options [Member] | Goldfinger [Member]
   
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Exercise price $ 5.00  
Stock based compensation, options granted 511,052  
Vesting rate 50.00%  
Option vesting terms 50% will vest based on the achievement of targeted annual milestones which have not yet been set by the board of directors.