Statements of Assets and Liabilities (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Statement of Financial Position [Abstract]
Investment in ETC, at fair value (cost $84,533 and $85,055 as of March 31, 2025 and December 31, 2024, respectively)	$ 84,008	$ 85,055

Cost of the investment.

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