Annual report pursuant to Section 13 and 15(d)

Document And Entity Information

Document And Entity Information - USD ($)
12 Months Ended
Dec. 31, 2022
Mar. 30, 2023
Jun. 30, 2022
Document Information [Line Items]      
Entity Registrant Name PRINCETON CAPITAL CORP    
Document Type 10-K    
Current Fiscal Year End Date --12-31    
Entity Common Stock, Shares Outstanding   120,486,061  
Entity Public Float     $ 1,325,460
Amendment Flag false    
Entity Central Index Key 0000845385    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Non-accelerated Filer    
Entity Well-known Seasoned Issuer No    
Document Period End Date Dec. 31, 2022    
Document Fiscal Year Focus 2022    
Document Fiscal Period Focus FY    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
ICFR Auditor Attestation Flag false    
Document Annual Report true    
Document Transition Report false    
Securities Act File Number 814-00710    
Entity Incorporation, State or Country Code MD    
Entity Tax Identification Number 46-3516073    
Entity Address, Address Line One 800 Turnpike Street    
Entity Address, Address Line Two Suite 300    
Entity Address, City or Town North Andover    
Entity Address, State or Province MA    
Entity Address, Postal Zip Code 01845    
City Area Code (978)    
Local Phone Number 794-3366    
Entity Interactive Data Current Yes    
Auditor Name WithumSmith+Brown, PC    
Auditor Location Whippany, New Jersey    
Auditor Firm ID 100