Summary of significant accounting policies (Details - Fair value of investments)	9 Months Ended
	Sep. 30, 2026 USD ($)
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Investment Owned, Balance, Principal Amount	$ 63,694,998
Cumulative unrealized gains (losses)	(10,303,231)
Investments owned at fair value	53,391,766
Investments owned at cost	45,000,000
Impairment charges	0
Investment owned at cost, adjusted	45,000,000
Common Stock [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Investment Owned, Balance, Principal Amount	60,649,998
Cumulative unrealized gains (losses)	(11,684,231)
Investments owned at fair value	48,965,766
Investments owned at cost	10,000,000
Impairment charges	0
Investment owned at cost, adjusted	10,000,000
Pre Funded Warrants [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Investment Owned, Balance, Principal Amount	2,850,000
Cumulative unrealized gains (losses)	836,000
Investments owned at fair value	3,686,000
Investments owned at cost	30,000,000
Impairment charges	0
Investment owned at cost, adjusted	30,000,000
Non Public Warrants [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Investment Owned, Balance, Principal Amount	195,000
Cumulative unrealized gains (losses)	545,000
Investments owned at fair value	740,000
Preferred Stock [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Investments owned at cost	5,000,000
Impairment charges	0
Investment owned at cost, adjusted	$ 5,000,000