Quarterly report pursuant to Section 13 or 15(d)

Earnings (loss) per share - Antidilutive Securities (Details)

v3.5.0.2
Earnings (loss) per share - Antidilutive Securities (Details) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Share options        
Antidilutive securities        
Potentially dilutive equity instruments excluded from the diluted loss per share (in shares) 46,127,274 31,473,477 46,127,274 31,473,477