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Statement of Assets and Liabilities (Unaudited) (Parenthetical) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Statement of Financial Position [Abstract]    
Investment in palladium at cost $ 370,187 $ 356,585
Common stock, shares authorized Unlimited Unlimited
Common stock, no par value (in dollars per share) $ 0 $ 0
Common stock, shares issued 2,400,000 2,100,000
Common stock, shares outstanding 2,400,000 2,100,000
Net asset value per share (in dollars per share) $ 93.35 $ 104.43