Note 5 - Derivative Instruments and Hedging Activities - Summary of Gains (Losses) on Derivative Instruments - Hashdex Bitcoin Futures ETF (Details) - USD ($)	4 Months Ended	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Realized Gain on Commodity Futures Contracts		$ (94,248,842)	$ (43,176,670)	$ 117,839,481
Net Change in Unrealized Depreciation on Commodity Futures Contracts		12,703,858	(33,905,514)	$ (29,744,871)
Hashdex Bitcoin Futures ETF [Member]
Realized Gain on Commodity Futures Contracts	$ (423,794)	1,308,803
Net Change in Unrealized Depreciation on Commodity Futures Contracts	29,152	48,991
Bitcoin Futures Contracts [Member]
Realized Gain on Commodity Futures Contracts		1,308,803	(423,794)
Net Change in Unrealized Depreciation on Commodity Futures Contracts		48,991	$ 29,152
Bitcoin Futures Contracts [Member] | Hashdex Bitcoin Futures ETF [Member]
Realized Gain on Commodity Futures Contracts	(423,794)	1,308,803
Net Change in Unrealized Depreciation on Commodity Futures Contracts	$ 29,152	$ 48,991