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Earnings per Share (Tables)
3 Months Ended
Mar. 31, 2018
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The following table sets forth the weighted-average shares used in calculating the earnings per share for the months ended March 31, 2018 and 2017.
 
Three Months Ended 
 March 31,
 
2018
 
2017
Basic weighted-average shares
24,146,000

 
23,472,000

Conversion of unsecured loan notes

 

Unexercised options and unvested RSUs

 

Diluted weighted-average shares
24,146,000

 
23,472,000