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Statements of Changes in Net Assets - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2017
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Statements of Changes in Net Assets [Abstract]        
Opening balance (in Shares)   8,300,000 7,350,000 7,350,000
Creations (in Shares)   300,000   1,650,000
Redemptions (in Shares)   (150,000)   (700,000)
Closing balance (in Shares) 8,450,000 8,450,000   8,300,000
Opening balance   $ 934,952 $ 761,731 $ 761,731
Net investment loss $ (987) (1,946) (1,835) (3,924)
Realized gain (loss) on investment in gold   383   (5,714)
Change in unrealized (loss) / gain on investment in gold (2,639) 66,752 $ 196,580 59,660
Change in unrealized gain on unsettled creations or redemptions       44
Creations   36,198   202,685
Redemptions   (18,182)   (79,530)
Closing balance $ 1,018,157 $ 1,018,157   $ 934,952