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, 2022	Dec. 31, 2021	Dec. 31, 2020
Realized Gain on Commodity Futures Contracts		$ (43,176,670)	$ 117,839,481	$ 25,091,898
Net Change in Unrealized Depreciation on Commodity Futures Contracts		(33,905,514)	$ (29,744,871)	$ 35,293,415
Hashdex Bitcoin Futures ETF [Member]
Realized Gain on Commodity Futures Contracts	$ (423,794)
Net Change in Unrealized Depreciation on Commodity Futures Contracts	29,152
Bitcoin Futures Contracts [Member]
Realized Gain on Commodity Futures Contracts		(423,794)
Net Change in Unrealized Depreciation on Commodity Futures Contracts		$ 29,152
Bitcoin Futures Contracts [Member] | Hashdex Bitcoin Futures ETF [Member]
Realized Gain on Commodity Futures Contracts	(423,794)
Net Change in Unrealized Depreciation on Commodity Futures Contracts	$ 29,152