CONSOLIDATED SCHEDULE OF PORTFOLIO INVESTMENTS (Schedule of Percentage of Total Investments)	Dec. 31, 2025	Dec. 31, 2024
Schedule of Investments [Line Items]
Percentage of Total Investments (at fair value)	100.00%	100.00%
Professional and Business Services
Schedule of Investments [Line Items]
Percentage of Total Investments (at fair value)	35.40%	47.60%
Manufacturing
Schedule of Investments [Line Items]
Percentage of Total Investments (at fair value)	14.80%	12.70%
Distribution
Schedule of Investments [Line Items]
Percentage of Total Investments (at fair value)	13.60%	9.70%
Consumer Product
Schedule of Investments [Line Items]
Percentage of Total Investments (at fair value)	13.30%	17.70%
Automotive
Schedule of Investments [Line Items]
Percentage of Total Investments (at fair value)	6.50%	4.10%
Health and Wellness
Schedule of Investments [Line Items]
Percentage of Total Investments (at fair value)	6.30%	4.10%
Marketing
Schedule of Investments [Line Items]
Percentage of Total Investments (at fair value)	5.70%
Software
Schedule of Investments [Line Items]
Percentage of Total Investments (at fair value)	4.40%	4.10%

RAND CAPITAL CORP 10-K/A