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Note 5 - Derivative Instruments and Hedging Activities - Summary of Gains (Losses) on Derivative Instruments - Hashdex Bitcoin Futures ETF (Details) - USD ($)	3 Months Ended			6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	[1]	Jun. 30, 2023	Jun. 30, 2022	[1]
Realized Gain on Commodity Futures Contracts	$ (15,950,119)	$ 26,913,430		$ (42,541,244)	$ 88,611,840
Net Change in Unrealized Depreciation on Commodity Futures Contracts	(8,646,874)	$ (112,660,860)		(14,470,153)	$ (127,795,433)
Hashdex Bitcoin Futures ETF [Member]
Realized Gain on Commodity Futures Contracts	71,236			700,787
Net Change in Unrealized Depreciation on Commodity Futures Contracts	(30,948)			97,520
Bitcoin Futures Contracts [Member]
Realized Gain on Commodity Futures Contracts	71,236			700,787
Net Change in Unrealized Depreciation on Commodity Futures Contracts	(30,948)			97,520
Bitcoin Futures Contracts [Member] | Hashdex Bitcoin Futures ETF [Member]
Realized Gain on Commodity Futures Contracts	71,236			700,787
Net Change in Unrealized Depreciation on Commodity Futures Contracts	$ (30,948)			$ 97,520
[1] The Hashdex Bitcoin Futures ETF commenced operations on September 15, 2022.

X

- Definition

The difference between the book value and the sale price of agreements to purchase or sell mineral resources, energy, and agricultural products at some future point. This element refers to the gain (loss) included in earnings and not to the cash proceeds.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-28

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(7)(a)(8))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1

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X

- Definition

The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of open agreements to purchase or sell mineral resources, energy, and agricultural products at some future point held at each balance sheet date, that was included in earnings for the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-28

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(7)(c)(8))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1

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