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Statements of Changes in Net Assets - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Statements of Changes in Net Assets [Abstract]      
Opening balance (in Shares) 7,350,000 7,800,000  
Creations (in Shares) 1,650,000 250,000  
Redemptions (in Shares) (700,000) (700,000)  
Closing balance (in Shares) 8,300,000 7,350,000 7,800,000
Opening balance $ 761,731 $ 916,197  
Net investment loss (3,924) (3,445) $ (4,166)
Realized loss on investment in gold (5,714) (3,504)  
Change in unrealized gain (loss) on investment in gold 59,660 (101,529) (2,266)
Change in unrealized gain (loss) on unsettled creations or redemptions 44 (175)  
Creations 202,685 30,185  
Redemptions (79,530) (75,998)  
Closing balance $ 934,952 $ 761,731 $ 916,197