v3.8.0.1
Significant Accounting Policies (Narrative) (Details) - USD ($)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Significant Accounting Policies [Abstract]      
Percentage of palladium held by the Zurich Sub-Custodian 59.00%    
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 $ 357,192 $ 291,896  
Fees payable to Sponsor 117,990   $ 124,409
All other expenses $ 0 $ 0  
[1] Annualized for periods of less than one year.