Annual report pursuant to section 13 and 15(d)

Stock-based compensation (Summary of Status of Company's Stock Option Activity) (Details)

v2.4.0.8
Stock-based compensation (Summary of Status of Company's Stock Option Activity) (Details) (Employee Stock Option [Member], USD $)
12 Months Ended
Dec. 31, 2013
Employee Stock Option [Member]
 
Shares  
Outstanding at December 31, 2012   
Granted 766,578
Exercised   
Cancelled, expired, or forfeited   
Outstanding at December 31, 2013 766,578
Exercisable at December 31, 2013 31,923
Weighted-Average Exercise Price  
Outstanding at December 31, 2012   
Granted $ 5.00
Exercised   
Cancelled, expired, or forfeited   
Outstanding at December 31, 2013 $ 5.00
Exercisable at December 31, 2013 $ 5.00
Weighted-Average Remaining Contractual Term  
Outstanding at December 31, 2013 9 years 9 months 18 days
Exercisable at December 31, 2013 9 years 9 months 18 days
Aggregate Intrinsic Value  
Outstanding at December 31, 2013 $ 574,934
Exercisable at December 31, 2013 $ 23,942