Financial Highlights Per Share Performance (Tables)

12 Months Ended

Jun. 30, 2022

Investment Company, Financial Highlights [Abstract]

Summary of Per Share Data

	Years Ended June 30,
	2022			2021			2020
Per Share Data:
Net asset value, beginning of year	$	4.79		$	2.09		$	4.00
Net (decrease) increase in net assets from investment operations:
Net investment loss		(0.10	)		(0.12	)		(0.07	)
Net realized and unrealized (loss) gain		(3.79	)		2.82			(1.84	)
Net (decrease) increase in net assets resulting from operations		(3.89	)		2.70			(1.91	)
Net asset value, end of year	$	0.90		$	4.79		$	2.09
Total return		-81.21	%		129.19	%		-47.75	%
Ratios to average net assets:
Net investment loss		-2.50	%		-2.50	%		-2.50	%
Expenses		-2.50	%		-2.50	%		-2.50	%