Current report filing

Share based compensation - Option Plans (Details)

v3.5.0.2
Share based compensation - Option Plans (Details)
 1 Months Ended 6 Months Ended 10 Months Ended 12 Months Ended 48 Months Ended
Mar. 16, 2015
GBP (£)
plan
item
Dec. 31, 2014
Dec. 31, 2015
shares
Dec. 31, 2015
shares
Jun. 30, 2015
shares
Jun. 30, 2013
shares
Dec. 31, 2009
Dec. 31, 2014
Share based compensation                
Number of option plans | plan 2              
Maximum value of option grants per participant | £ £ 30,000              
Options exercised (in shares)     0   0 0    
Scheme limit, grants as a percentage of fully diluted share capital of the Company immediately following the IPO (as a percent) 8.00%              
Scheme limit, automatic increase percentage (as a percent) 4.00%              
Number of option schemes | item 3              
Options granted in March 2015 and on May 11, 2015                
Share based compensation                
Options exercised (in shares)       0        
Contractual term (in years) 10 years              
Options granted in March 2015 and on May 11, 2015 | First anniversary                
Share based compensation                
Vesting percentage (as a percent) 25.00%              
Vesting period (in years) 1 year              
Options granted in March 2015 and on May 11, 2015 | Monthly installments over the following three years                
Share based compensation                
Vesting percentage (as a percent) 75.00%              
Vesting period (in years) 3 years              
Options granted in 2009                
Share based compensation                
Vesting percentage (as a percent)             100.00%  
Vesting period (in years)             3 years  
Contractual term (in years)             10 years  
Options granted in 2011, 2012, 2013, and April 2014                
Share based compensation                
Contractual term (in years)               10 years
Options granted in 2011, 2012, 2013, and April 2014 | First anniversary                
Share based compensation                
Vesting percentage (as a percent)               25.00%
Vesting period (in years)               1 year
Options granted in 2011, 2012, 2013, and April 2014 | Annual installments over the following three years                
Share based compensation                
Vesting percentage (as a percent)               75.00%
Vesting period (in years)               3 years
Options granted in December 2014                
Share based compensation                
Contractual term (in years)   10 years            
Options granted in December 2014 | First anniversary                
Share based compensation                
Vesting percentage (as a percent)   25.00%            
Vesting period (in years)   1 year            
Options granted in December 2014 | Monthly installments over the following three years                
Share based compensation                
Vesting percentage (as a percent)   75.00%            
Vesting period (in years)   3 years