Fair Value of Bitcoin Cash - Changes in Quantity of BCH and Respective Fair Value (Detail) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2022 USD ($) BitcoinCash	Mar. 31, 2021 USD ($)	Mar. 31, 2022 USD ($) BitcoinCash	Mar. 31, 2021 USD ($) BitcoinCash	Jun. 30, 2021 USD ($) BitcoinCash
Fair Value Disclosures [Abstract]
Investment Owned, Balance | BitcoinCash			298,405.98055893	25,708.08266279	25,708.08266279
BCH contributed | BitcoinCash			21,839.80475225		278,010.14128724
BCH distributed for Sponsor's Fee, related party | BitcoinCash			(5,914.86581319)		(5,312.24339110)
Net change in unrealized appreciation on investment in BCH | BitcoinCash			0		0
Net realized gain on investment in BCH | BitcoinCash			0		0
Investment Owned, Balance | BitcoinCash	314,330.91949799		314,330.91949799		298,405.98055893
Investment Owned, at Fair Value | $			$ 155,466	$ 5,685	$ 5,685
BCH contributed | $			11,124		92,401
BCH distributed for Sponsor's Fee, related party | $			(2,881)		(2,782)
Net change in unrealized (depreciation) appreciation on investment in Bitcoin Cash | $	$ (13,699)	$ 43,931	(45,777)	61,505	59,541
Net realized gain on investment in BCH | $	(80)	$ 279	678	$ (161)	621
Investment Owned, at Fair Value | $	$ 118,610		$ 118,610		$ 155,466