Financial Highlights Per Share Performance - Summary of Per Share Data (Details) - $ / shares	3 Months Ended		9 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Per Share Data:
Net asset value, beginning of period	$ 0.86	$ 3.82	$ 0.90	$ 4.79
Net ncrease (decrease) in net assets from investment operations:
Net investment loss	(0.01)	(0.02)	(0.02)	(0.08)
Net realized and unrealized gain (loss)	0.24	(0.39)	(0.21)	(1.30)
Net increase (decrease) in net assets resulting from operations	0.23	(0.41)	(0.19)	(1.38)
Net asset value, end of period	$ 1.09	$ 3.41	$ 1.09	$ 3.41
Total return	26.74%	(10.73%)	21.11%	(28.81%)
Ratios to average net assets:
Net investment loss	(2.50%)	(2.50%)	(2.50%)	(2.50%)
Expenses	(2.50%)	(2.50%)	(2.50%)	(2.50%)