Note 3 - Summary of Significant Accounting Policies - Waived Expenses Paid by Sponsor - Hashdex Bitcoin Futures ETF (Details) - USD ($)	4 Months Ended	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Expenses waived by the Sponsor		$ 711,571	$ 1,277,037	$ 2,183,856
Hashdex Bitcoin Futures ETF [Member]
Expenses waived by the Sponsor	$ 75,291	$ 271,380	$ 75,291	$ 0