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Note 5 - Related Parties	12 Months Ended
Note 5 - Related Parties	Dec. 31, 2018
Notes to Financial Statements
Related Party Transactions Disclosure [Text Block]	5 - Related Parties The Sponsor, the Trustee and the Advisor are considered to be related parties to the Trust. The Trustee’s and Advisor’s fees are paid by the Sponsor and are not a separate expense of the Trust.