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Statements of Assets and Liabilities (Parenthetical) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Statements of Assets and Liabilities [Abstract]    
Investment in gold at cost $ 979,403 $ 886,514
Common stock, shares authorized unlimited unlimited
Common stock, par value $ 0 $ 0
Net asset value per share $ 112.65 $ 103.64
Common stock, shares issued 8,300,000 7,350,000
Common stock, shares outstanding 8,300,000 7,350,000