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Statements of Assets and Liabilities (Parenthetical) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Common stock, shares authorized unlimited unlimited
Common stock, par value $ 0 $ 0
Investment in bullion at cost $ 188,277 $ 242,403
Common stock, shares issued 3,100,000 3,850,000
Common stock, shares outstanding 3,100,000 3,850,000
Net asset value per Share $ 52.18 $ 61.60
Gold [Member]    
Investment in bullion at cost $ 105,233 $ 133,156
Silver [Member]    
Investment in bullion at cost 56,260 73,612
Platinum [Member]    
Investment in bullion at cost 14,204 19,160
Palladium [Member]    
Investment in bullion at cost $ 12,580 $ 16,475