Statements of Assets and Liabilities (Unaudited) (Parenthetical) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2021	Dec. 31, 2020
Investment Company [Abstract]
Investment in palladium at cost	$ 315,649	$ 224,166
Common stock, shares authorized	Unlimited	Unlimited
Common stock, no par value (in dollars per share)	$ 0	$ 0
Common stock, shares issued	1,850,000	1,625,000
Common stock, shares outstanding	1,850,000	1,625,000
Net asset value per share (in dollars per share)	$ 176.96	$ 219.22

Face amount per share of no-par value common stock.

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Indicates that the number of common shares permitted to be issued by an entity's charter and bylaws is unlimited. The acceptable value is "Unlimited".

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Cost of the investment.

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Net asset value per share or per unit of investments in certain entities that calculate net asset value per share. Includes, but is not limited to, by unit, membership interest, or other ownership interest. Investment includes, but is not limited to, investment in certain hedge funds, venture capital funds, private equity funds, real estate partnerships or funds. Excludes fair value disclosure.

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