Quarterly report pursuant to Section 13 or 15(d)

Stock-based compensation (Details)

v2.4.0.8
Stock-based compensation (Details) (Employee Stock Option [Member], USD $)
 3 Months Ended
Mar. 31, 2014
Employee Stock Option [Member]
  
Number of shares, Converted outstanding options at January 1, 2014 4,402,890
Number of shares, Granted   
Number of shares, Exercised (175,272)
Number of shares, Cancelled (71,606)
Number of shares, Outstanding ending balance 4,156,012
Number of shares, Options exercisable ending 3,652,470
Weighted average exercise price, Converted outstanding options at January 2, 2014 0.11
Weighted average exercise price, Exercised $ 0.11
Weighted average exercise price, Cancelled $ 0.11
Weighted average exercise price, Options exercisable $ 0.10
Aggregate intrinsic value, Outstanding beginning balance   
Aggregate intrinsic value, Converted outstanding options at January 2, 2014 2,038,538
Aggregate intrinsic value, Granted   
Aggregate intrinsic value, Exercised 80,976
Aggregate intrinsic value, Cancelled 32,939
Aggregate intrinsic value, Outstanding ending balance 1,911,766
Aggregate intrinsic value, Options exercisable $ 1,701,827