Consolidated Financial Highlights - Schedule of Financial Highlights (Details) - USD ($)		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022		Dec. 31, 2021		Dec. 31, 2020
Net asset value at beginning of year (in dollars per share)		$ 0.18	$ 4.44	$ 13.75		$ 14.82		$ 17.7
Income from investment operations:
Net investment income (loss), before deferred taxes(1) (in dollars per share)		0.27	0.16	(1.81)	[1]	0.44	[1]	0.09	[1]
Net realized and unrealized losses on investments, before deferred taxes (in dollars per share)		(0.3)	(4.42)	(7.5)		(1.51)		(2.3)
Tax expense (in dollars per share)		0	0	0		0		(1.13)
Net realized and unrealized losses on investments, after deferred taxes (in dollars per share)		(0.3)	(4.42)	(7.5)		(1.51)		(3.43)
Total from investment operations (in dollars per share)		(0.03)	(4.26)	(9.31)		(1.07)		(3.34)
Realized capital gains (in dollars per share)		0	0	0		0		0
Anti-dilutive effect from capital share transactions (in dollars per share)		0	0	0		0		0.46
Net asset value at end of year (in dollars per share)		0.15	0.18	4.44		13.75		14.82
Market value at end of year (in dollars per share)		$ 0.06	$ 0.3	$ 0.95		$ 4.01		$ 4.47
Total Return
Based on Net Asset Value		(16.67%)	(95.95%)	(67.71%)		(7.22%)		(16.27%)
Based on Market Value		(80.00%)	(68.42%)	(76.31%)		(10.29%)		(30.48%)
Net assets at end of year (millions)		$ 1,060,679	$ 1,260,371	$ 30,609,591		$ 94,754,624		$ 102,100,000
Before tax expense		(195.48%)	(7.21%)	4.11%		3.12%		3.10%
Tax expense(2)(3)	[2],[3]	14.28%	0.00%	0.00%		0.00%		8.02%	[4]
Total expenses		(181.20%)	(7.21%)	4.11%		3.12%		11.12%
Total expenses, excluding incentive fees and deferred tax expense		(195.48%)	(7.21%)	4.11%		3.12%		3.10%
Total expenses, excluding incentive fees and deferred tax expense and fee waiver		121.49%	11.91%	4.11%		3.12%		3.10%
Net investment income (loss)		206.76%	8.13%	(20.96%)		2.94%		0.64%
Net investment income before fee waiver		(110.22%)	(10.99%)	(20.96%)		2.94%		0.64%
Portfolio turnover rate		0.00%	1.00%	15.00%		16.00%		13.00%

[1] Calculated using average shares outstanding.

[2] Tax expense estimate is derived from net investment income (loss), and realized and unrealized gains (losses).

[3] The tax expense is based on average net assets.

[4] As restated to reflect the removal of parenthetical notation to appropriately present ratio as tax expense.