Summary of significant accounting policies (Details - Fair value of investments) - USD ($)	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Impairment charges	$ 0	$ 0
Public Common Stock [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Investments owned at cost			$ 28,150,000
Cumulative unrealized gains (losses)	6,552,949
Investments owned at fair value	34,702,949
Public Pre Funded Warrants [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Investments owned at cost			2,850,000
Cumulative unrealized gains (losses)	940,500
Investments owned at fair value	3,790,500
Non Public Warrants [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Investments owned at cost			195,000
Cumulative unrealized gains (losses)	585,000
Investments owned at fair value	780,000
Publicly Held Investments [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Investments owned at cost			$ 31,195,000
Cumulative unrealized gains (losses)	8,078,449
Investments owned at fair value	39,273,449
Common Stock [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Investments owned at cost	12,500,000
Impairment charges	0
Investment owned at cost, adjusted	12,500,000
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
Common And Preferred Stock [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Investments owned at cost	47,500,000
Impairment charges	0
Investment owned at cost, adjusted	$ 47,500,000