Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
3 Months Ended
Mar. 31, 2024
May 13, 2024
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Mar. 31, 2024  
Document Fiscal Year Focus 2024  
Document Fiscal Period Focus Q1  
Trading Symbol RAND  
Entity Registrant Name Rand Capital Corporation  
Entity Central Index Key 0000081955  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Small Business false  
Entity Shell Company false  
Entity Emerging Growth Company false  
Entity Common Stock, Shares Outstanding   2,581,021
Title of 12(b) Security Common Stock, $0.10 par value  
Security Exchange Name NASDAQ  
Entity File Number 814-00235  
Entity Incorporation, State or Country Code NY  
Entity Tax Identification Number 16-0961359  
Entity Address, Address Line One 1405 Rand Building  
Entity Address, City or Town Buffalo  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 14203  
City Area Code 716  
Local Phone Number 853-0802  
Document Quarterly Report true  
Document Transition Report false