XML 27 R16.htm IDEA: XBRL DOCUMENT v3.7.0.1
Significant Accounting Policies (Narrative) (Details) - USD ($)
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Bullion [Line Items]      
Basket of shares 50,000    
Fair value transfers $ 0   $ 0
Reserve for uncertain tax positions $ 0   0
Annualized rate of Sponsors Fee [1] 0.60% 0.60%  
Sponsor Fees $ 430,339 $ 241,202  
Fees payable to Sponsor 154,561   $ 129,462
All other expenses $ 0 $ 0  
Silver [Member]      
Bullion [Line Items]      
Percentage of assets help by Zurich Sub-Custodian 0.00%    
Platinum [Member]      
Bullion [Line Items]      
Percentage of assets help by Zurich Sub-Custodian 2.00%    
Palladium [Member]      
Bullion [Line Items]      
Percentage of assets help by Zurich Sub-Custodian 2.00%    
Gold [Member]      
Bullion [Line Items]      
Percentage of assets help by Zurich Sub-Custodian 0.00%    
[1] Annualized for periods of less than one year.