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Financial Highlights (USD $)
 12 Months Ended
Dec. 31, 2014
Per Share Performance (for a Share outstanding throughout the entire period)  
Net asset value per Share at beginning of year $ 69.42pall_NetAssetValuePerShare [1]
Income from investment operations:  
Net investment loss $ (0.47)pall_NetInvestmentIncomLossPerShare [1]
Total realized gain and change in unrealized gain on investment in palladium $ 8.49pall_NetRealizedAndUnrealizedGainsAndLossesOnInvestmentInBullionPerShare [1]
Change in net assets from operations $ 8.02pall_ChangeInNetAssetsFromOperationsPerShare [1]
Net asset value per Share at end of year $ 77.44pall_NetAssetValuePerShare [1]
Weighted average number of shares 6,346,438us-gaap_WeightedAverageNumberOfSharesOutstandingBasic [1]
Expense Ratio  
Sponsor's Fee per Share 0.60%pall_AnnualizedRateOfSponsorsFee [1]
Net Investment Loss Ratio  
Net investment loss ratio (0.60%)pall_AnnualizedNetInvestmentIncomeLossRatio [1]
Total Return 11.55%pall_NonAnnualizedTotalReturn [1]
[1] Effective January 1, 2014, the Trust has adopted the provisions of Topic 946, Investment Companies, and follows specialized accounting. Refer to Note 2.1 for additional information.