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Earnings per Share (Tables)
 6 Months Ended
Jun. 30, 2020
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 three and six months ended June 30, 2020 and 2019.
 
Three Months Ended 
 June 30,
Six Months Ended 
 June 30,
 
2020
2019
2020
2019
Basic weighted-average shares
24,668,000

24,187,000

24,633,000

24,182,000

Conversion of unsecured loan notes
—

—

—

—

Unexercised options and unvested RSUs
—

—

—

—

Diluted weighted-average shares
24,668,000

24,187,000

24,633,000

24,182,000