Annual report pursuant to Section 13 and 15(d)

Share based compensation - Stock Options Outstanding (Details)

v3.10.0.1
Share based compensation - Stock Options Outstanding (Details)
12 Months Ended
Dec. 31, 2018
£ / shares
shares
Share-based compensation  
Outstanding - Total Share Options | shares 87,564,769
Outstanding - Weighted-Average Remaining Contractual Life 7 years 7 months 6 days
Outstanding - Weighted Average Exercise Price £ 0.60
Exercisable - Total Share Options | shares 47,678,481
Exercisable - Weighted-Average Exercise Price £ 0.55
Exercise Price $0  
Share-based compensation  
Exercise price | shares 0
Outstanding - Total Share Options | shares 8,099,412
Outstanding - Weighted-Average Remaining Contractual Life 9 years 2 months 12 days
Outstanding - Weighted Average Exercise Price £ 0.00
Exercise Price $0.01 - $0.25  
Share-based compensation  
Exercise Price, Lower Range Limit 0.01
Exercise Price, Upper Range Limit £ 0.25
Outstanding - Total Share Options | shares 7,268,412
Outstanding - Weighted-Average Remaining Contractual Life 4 years 10 months 24 days
Outstanding - Weighted Average Exercise Price £ 0.12
Exercisable - Total Share Options | shares 7,268,412
Exercisable - Weighted-Average Exercise Price £ 0.12
Exercise Price $0.26 - $0.50  
Share-based compensation  
Exercise Price, Lower Range Limit 0.26
Exercise Price, Upper Range Limit £ 0.50
Outstanding - Total Share Options | shares 16,714,988
Outstanding - Weighted-Average Remaining Contractual Life 6 years 1 month 6 days
Outstanding - Weighted Average Exercise Price £ 0.43
Exercisable - Total Share Options | shares 16,156,497
Exercisable - Weighted-Average Exercise Price £ 0.42
Exercise Price $0.51 - $0.75  
Share-based compensation  
Exercise Price, Lower Range Limit 0.51
Exercise Price, Upper Range Limit £ 0.75
Outstanding - Total Share Options | shares 28,617,051
Outstanding - Weighted-Average Remaining Contractual Life 8 years 2 months 12 days
Outstanding - Weighted Average Exercise Price £ 0.61
Exercisable - Total Share Options | shares 13,465,614
Exercisable - Weighted-Average Exercise Price £ 0.61
Exercise Price $0.76 - $1.00  
Share-based compensation  
Exercise Price, Lower Range Limit 0.76
Exercise Price, Upper Range Limit £ 1.00
Outstanding - Total Share Options | shares 22,317,845
Outstanding - Weighted-Average Remaining Contractual Life 8 years
Outstanding - Weighted Average Exercise Price £ 0.93
Exercisable - Total Share Options | shares 9,323,729
Exercisable - Weighted-Average Exercise Price £ 0.90
Exercise Price $1.01 - $1.50  
Share-based compensation  
Exercise Price, Lower Range Limit 1.01
Exercise Price, Upper Range Limit £ 1.50
Outstanding - Total Share Options | shares 2,751,818
Outstanding - Weighted-Average Remaining Contractual Life 8 years 6 months
Outstanding - Weighted Average Exercise Price £ 1.18
Exercisable - Total Share Options | shares 934,295
Exercisable - Weighted-Average Exercise Price £ 1.04
Exercise Price $1.51 - $2.00  
Share-based compensation  
Exercise Price, Lower Range Limit 1.51
Exercise Price, Upper Range Limit £ 2.00
Outstanding - Total Share Options | shares 1,795,243
Outstanding - Weighted-Average Remaining Contractual Life 8 years 7 months 6 days
Outstanding - Weighted Average Exercise Price £ 1.71
Exercisable - Total Share Options | shares 529,934
Exercisable - Weighted-Average Exercise Price £ 1.82