Audit Information	12 Months Ended
Audit Information	Dec. 31, 2023
Auditor [Table]
Auditor Name	WithumSmith+Brown, PC
Auditor Firm ID	100
Auditor Location	Whippany, New Jersey
Auditor Opinion [Text Block]	Opinion on the Financial Statements We have audited the accompanying Statements of Assets and Liabilities of Princeton Capital Corporation (the "Company"), including the schedules of investments, as of December 31, 2023 and 2022, the related statements of operations, changes in net assets, and cash flows for each of the three years in the period ended December 31, 2023, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2023 and 2022, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2023, in conformity with accounting principles generally accepted in the United States of America.