Fair Value of Bitcoin Cash - Changes in Quantity of BCH and Respective Fair Value (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2022 USD ($) BitcoinCash	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($) BitcoinCash	Jun. 30, 2021 USD ($) BitcoinCash	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($) BitcoinCash	Jun. 30, 2022 USD ($) BitcoinCash	Jun. 30, 2021 USD ($) BitcoinCash	Jun. 30, 2020 USD ($) BitcoinCash
Fair Value Disclosures [Abstract]
Investment Owned, Balance | BitcoinCash				298,405.98055893				25,708.08266279	298,405.98055893	25,708.08266279	15,842.58440691
BCH contributed | BitcoinCash									21,839.80475225	278,010.14128724	10,587.83125930
BCH distributed for Sponsor's Fee, related party | BitcoinCash									(7,868.02534640)	(5,312.24339110)	(722.33300342)
Net change in unrealized appreciation (depreciation) on investment in BCH | BitcoinCash									0	0	0
Net realized gain (loss) on investment in BCH | BitcoinCash									0	0	0
Investment Owned, Balance | BitcoinCash	312,377.75996478				298,405.98055893				312,377.75996478	298,405.98055893	25,708.08266279
Investment Owned, at Fair Value | $				$ 155,466				$ 5,685	$ 155,466	$ 5,685	$ 6,559
BCH contributed | $									11,124	92,401	2,779
BCH distributed for Sponsor's Fee, related party | $									(3,330)	(2,782)	(197)
Net change in unrealized (depreciation) appreciation on investment in BCH | $	$ (86,668)	$ (13,699)	$ (24,547)	(7,531)	$ (1,964)	$ 43,931	$ 24,357	(6,783)	(132,445)	59,541	(3,255)
Net realized (loss) gain on investment in BCH | $	(280)	$ (80)	$ 363	$ 395	782	$ 279	$ (355)	$ (85)	398	621	(201)
Investment Owned, at Fair Value | $	$ 31,213				$ 155,466				$ 31,213	$ 155,466	$ 5,685