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Consolidated Balance Sheets (Parenthetical) - USD ($)
Dec. 31, 2019
Dec. 31, 2018
Assets    
Other investments, related party investment fund, cost $ 891,850 $ 1,564,850
Debt securities, trading, at fair value (cost - $129,330; 2018 - $252,362) $ 129,330 $ 252,362
Shareholders’ equity    
Preference shares, par value (in dollars per share) $ 0.10 $ 0.10
Preference shares, shares authorized (in shares) 30,000,000 30,000,000
Preference shares, shares issued (in shares) 0 0
Preference shares, shares outstanding (in shares) 0 0
Common Stock, Par or Stated Value Per Share $ 0.10 $ 0.10
Common share, shares authorized (in shares) 300,000,000 300,000,000
Common share, shares issued (in shares) 94,225,498 93,639,610
Common share, shares outstanding (in shares) 94,225,498 93,639,610
Treasury Stock, Shares 0 0