STATEMENTS OF CHANGES IN NET ASSETS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Jun. 30, 2022
Increase (decrease) in net assets from operations:
Net investment loss	$ (238)	$ (646)	$ (692)	$ (2,881)
Net realized (loss) gain on investment in BCH	(470)	(80)	(1,477)	678	$ 398
Net change in unrealized appreciation (depreciation) on investment in BCH	8,650	(13,699)	9,004	(45,777)	(132,445)
Net increase (decrease) in net assets resulting from operations	7,942	(14,425)	6,835	(47,980)
Increase in net assets from capital share transactions:
Shares issued	0	0	0	11,124
Net increase in net assets resulting from capital share transactions	0	0	0	11,124
Total increase (decrease) in net assets from operations and capital share transactions	7,942	(14,425)	6,835	(36,856)
Net assets:
Beginning of period	30,106	133,035	31,213	155,466	155,466
End of period	$ 38,048	$ 118,610	$ 38,048	$ 118,610	$ 31,213
Change in Shares outstanding:
Shares outstanding at beginning of period	34,812,900	34,812,900	34,812,900	32,434,700	32,434,700
Shares issued	0	0	0	2,378,200
Net increase in Shares	0	0	0	2,378,200
Shares outstanding at end of period	34,812,900	34,812,900	34,812,900	34,812,900	34,812,900