Document And Entity Information [Abstract] Statement [Table] Statement [Line Items] Document Type Amendment Flag Document Period End Date Document Fiscal Year Focus Document Fiscal Period Focus Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Entity Filer Category Entity Common Stock, Shares Outstanding Statements of Assets and Liabilities [Abstract] ASSETS [Abstract] ASSETS Investment in Physical Commodities Closing balance Opening balance Investment in platinum (cost: March 31, 2016: $629,783; December 31, 2015: $614,675) Assets Total assets LIABILITIES [Abstract] LIABILITIES Accounts Payable, Related Parties, Current Fees payable to Sponsor Fees payable to Sponsor Amount of bullion payable at market value as of the reporting date. Bullion payable at market value Platinum payable Liabilities Total liabilities Assets, Net Net assets The maximum number of common stock shares which the Trust is authorised to issue. Common stock, shares authorised Common stock, shares authorized Common Stock, No Par Value Common stock, par value Investment Owned, at Cost Investment in platinum at cost Cost Net asset value per Share Net asset value per Share Net asset value per Share at end of year Net asset value per Share at beginning of year Net asset value per share Common stock, shares issued Common stock, shares outstanding Schedule of Investments [Abstract] Schedule of Investments [Table] Investment Holdings [Line Items] Investment Owned, Balance, Other Measure Closing balance (in Ounces) Opening balance (in Ounces) Investment in Platinum (oz) Investment Owned, at Fair Value Fair Value Investment Owned, Percent of Net Assets % of Net Assets Non Investment Assets Less Non Investment Liabilities Less liabilities Investment Related Liabilities, As Percentage Of Net Assets Investment Related Liabilities, As Percentage Of Net Assets Less liabilities, % of Net Assets Assets Net, Percentage Of Net Assets Assets Net, Percentage Of Net Assets Net assets, % of Net Assets Statements of Operations [Abstract] EXPENSES [Abstract] EXPENSES Sponsor's Fee Sponsor Fees Operating Expenses Total expenses Net investment gain (loss) Net investment gain (loss) Net investment loss Net investment loss Gain (Loss) on Investments, Realized and Unrealized Alternative [Abstract] REALIZED AND UNREALIZED GAINS / (LOSSES) Gain (Loss) on Sale of Trust Assets to Pay Expenses Realized loss on platinum transferred to pay expenses Realized (loss) / gain on platinum transferred to pay expenses Realized gain or loss during the period on bullion distributed for the redemption of Shares. Realized gains or losses are calculated on a trade date basis using average cost. Realized Gain Loss On Bullion Distributed For Redemption Of Shares Realized (loss) / gain on platinum distributed for the redemption of Shares Change in unrealized gain (loss) on investment in Bullion Change in unrealized gain (loss) on investment in Bullion Change in unrealized gain / (loss) on investment in platinum Change in unrealized gain / (loss) on investment in platinum The net gain or loss in the period on bullion. Total gain (loss) on bullion Total gain / (loss) on platinum Net loss from operations Change in net assets from operations Net (loss) / gain per Share (in Dollars per share) Net increase / (decrease) in net assets per Share Weighted average number of Shares (in Shares) Weighted average number of shares Statements of Changes in Net Assets [Abstract] Shares, Outstanding Closing balance (in Shares) Opening balance (in Shares) Stock Issued During Period, Shares, New Issues Creations (in Shares) Stock Repurchased During Period, Shares Redemptions (in Shares) Stockholders' Equity Attributable to Parent Closing balance Opening balance Realized Investment Gains (Losses) Realized loss on investment in platinum Change in unrealized gain on unsettled creations or redemptions Change in unrealized gain on unsettled creations or redemptions Stock Issued During Period, Value, New Issues Creations Stock Redeemed or Called During Period, Value Redemptions Financial Highlights [Abstract] Financial Highlights [Abstract] Per Share Performance (for a Share outstanding throughout the entire period) [Abstract] Per Share Performance (for a Share outstanding throughout the entire period) [Abstract] Per Share Performance (for a Share outstanding throughout the entire period) Income from investment operations: [Abstract] Income from investment operations: [Abstract] Income from investment operations: Net investment incom (loss) per share Net investment incom (loss) per share Net investment loss Net realized and unrealized gains and losses on investment in Bullion per share Net realized and unrealized gains and losses on investment in Bullion per share Total realized and unrealized gains or losses on investment in platinum Change in net assets from operations per share Change in net assets from operations per share Change in net assets from operations Annualized rate of sponsors fee. Annualized Rate Of Sponsors Fee Expense ratio Expense ratio Annualized net investment income (loss) ratio Annualized net investment income (loss) ratio Net investment loss ratio Total return, at net asset value Total return, at net asset value Organization [Abstract] Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Organization Significant Accounting Policies [Abstract] Significant Accounting Policies [Text Block] Significant Accounting Policies Related Parties [Abstract] Related Party Transactions Disclosure [Text Block] Related Parties Concentration Of Risk [Abstract] Concentration Risk Disclosure [Text Block] Concentration Of Risk Indemnification [Abstract] Commitments and Contingencies Disclosure [Text Block] Indemnification Basis of Accounting, Policy [Policy Text Block] Basis Of Accounting Disclosure of valuation of bullion policy. Valuation Of Bullion [Policy Text Block] Valuation Of Platinum Disclosure of bullion receivable and payable policy. Receivable And Payable Policy Text Block Platinum Receivable And Payable Disclosure of creation and redemptions of shares policy. Creations And Redemptions Of Shares Policy Text Block Creations And Redemptions Of Shares Income Tax, Policy [Policy Text Block] Income Taxes Investment, Policy [Policy Text Block] Investment In Platinum Disclosure of expenses policy. Expenses Policy Text Block Expenses / Realized Gains / Losses Subsequent Events, Policy [Policy Text Block] Subsequent Events Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Categorization Of The Trust's Assets Tabular disclosure of movement in the investment in bullion in the Trust. Investments In Bullion Table Text Block Schedule Of Investment In Platinum The minimum block of shares that can be created or redeemed against bullion deposits or distributions. Minimum Block Of Shares Issued Redeemed Against Bullion Minimum block of shares issued redeemed against platinum Fair Value, Transfers Between All Levels, Amount Fair Value, Transfers Between All Levels, Amount Fair value transfers Liability for Uncertain Tax Positions, Noncurrent Reserve for uncertain tax positions Other Cost and Expense, Operating All other expenses Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Hierarchy [Axis] Fair Value Measurements Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Fair Value Inputs Level2 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Investment in Physical Commodities, Fair Value Disclosure Investment in platinum Ounces of bullion received into the Trust's account in respect of creations. Creations Ounces Of Bullion Creations (in Ounces) Ounces of bullion paid out of the Trust's account in respect of redemptions. Redemptions Ounces Of Bullion Redemptions (in Ounces) Ounces of bullion transferred to pay Trust's expenses. Transfers Of Bullion Ounces Transfers of platinum to pay expenses (in Ounces) Amount of creations of bullion in investment. Creations value of bullion Creations Value of bullion distributed at average cost for the redemption of Shares excluding bullion payable. Value Of Bullion Distributed For Redemption Of Shares Excluding Bullion Payable Redemptions Cost of Bullion transferred to pay Trust's expenses. Cost Of Bullion Transferred To Pay Expenses Transfers of platinum to pay expenses