Consolidated Financial Highlights - Schedule of Financial Highlights (Details) - USD ($)		9 Months Ended	12 Months Ended
		Sep. 30, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022		Dec. 31, 2021	Dec. 31, 2020		Jun. 30, 2025	Sep. 30, 2024	Jun. 30, 2024
Net asset value at beginning of period (in dollars per share)		$ 0.15	$ 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)	[1]	(0.09)	0.27	0.16	(1.81)		0.44	0.09
Net realized and unrealized losses on investments, before deferred taxes (in dollars per share)		(0.02)	(0.3)	(4.42)	(7.5)		(1.51)	(2.3)
Tax expense (in dollars per share)		0	0	0	0		0	(1.13)
Net realized and unrealized losses on investments, after deferred taxes (in dollars per share)		(0.02)	(0.3)	(4.42)	(7.5)		(1.51)	(3.43)
Total from investment operations (in dollars per share)		(0.11)	(0.03)	(4.26)	(9.31)		(1.07)	(3.34)
Realized capital gains (in dollars per share)		0	0	0	0		0	0
Anti-dilutive effect from capital share transactions (in dollars per share)		0	0	0	0		0	0.46
Net asset value at end of period (in dollars per share)		0.04	0.15	0.18	4.44		13.75	14.82
Market value at end of period (in dollars per share)		$ 0.06	$ 0.06	$ 0.3	$ 0.95		$ 4.01	$ 4.47
Total Return
Based on Net Asset Value	[2]	(73.33%)	(16.67%)	(95.95%)	(67.71%)		(7.22%)	(16.27%)
Based on Market Value	[2]	0.00%	(80.00%)	(68.42%)	(76.31%)		(10.29%)	(30.48%)
Net assets at end of period (millions)		$ 296,547	$ 1,060,679	$ 1,260,371	$ 30,600,000		$ 94,800,000	$ 102,100,000		$ 747,259	$ 1,544,147	$ 1,017,920
Before tax (benefit)/expense	[3]	139.62%	(195.48%)	(7.21%)	4.11%		3.12%	3.10%
Tax expense(2)(3)	[4],[5]	0.00%	14.28%	0.00%	0.00%	[6]	0.00%	8.02%	[6]
Total expenses	[3]	139.62%	(181.20%)	(7.21%)	4.11%		3.12%	11.12%
Total expenses, excluding incentive fees and deferred tax expense	[3]	139.62%	(195.48%)	(7.21%)	4.11%		3.12%	3.10%
Total expenses, excluding incentive fees and deferred tax expense and fee waiver	[3]	139.62%	121.49%	11.91%	4.11%		3.12%	3.10%
Net investment income (loss)	[3]	(107.81%)	206.76%	8.13%	(20.96%)		2.94%	0.64%
Net investment income (loss) before fee waiver	[3]	(107.81%)	(110.22%)	(10.99%)	(20.96%)		2.94%	0.64%
Portfolio turnover rate	[2]	0.00%	0.00%	1.00%	15.00%		16.00%	13.00%

[1] Calculated using average shares outstanding.

[2] Not Annualized.

[3] Annualized.

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

[5] The tax expense and tax benefit are based on average net assets.

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