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Condensed Statements of Assets and Liabilities (Parenthetical) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Condensed Statements of Assets and Liabilities [Abstract]    
Common stock, shares authorized unlimited unlimited
Common stock, par value $ 0 $ 0
Investment in platinum at cost $ 614,675 $ 699,924
Net asset value per share [1] $ 84.12 $ 117.43
Common stock, shares issued 4,750,000 5,200,000
Common stock, shares outstanding 4,750,000 5,200,000
[1] Effective January 1, 2014, the Trust has adopted the provisions of Topic 946. Refer to Note 2.1 for additional information.