Quarterly report pursuant to Section 13 or 15(d)

5. Stock-based compensation (Details 1)

v3.5.0.2
5. Stock-based compensation (Details 1)
9 Months Ended
Sep. 30, 2016
$ / shares
shares
Number of Options  
Balance at December 31, 2015 | shares 1,158,251
Shares granted during the period | shares 86,050
Shares exercised during the period | shares
Shares forfeited during the period | shares (67,235)
Shares expired during the period | shares (19,554)
Shares outstanding at September 30, 2016 | shares 1,157,512
Shares exercisable at September 30, 2016 | shares 421,673
Weighted Average Exercise Price  
Balance at December 31, 2015 | $ / shares $ 4.96
Shares granted during the period | $ / shares 1.79
Shares exercised during the period | $ / shares
Shares forfeited during the period | $ / shares 2.50
Shares expired during the period | $ / shares 72.11
Shares outstanding at September 30, 2016 | $ / shares 3.73
Shares exercisable at September 30, 2016 | $ / shares $ 5.77