v3.26.1

Selected Quarterly Financial Data (Unaudited) - Schedule of Selected Quarterly Financial Data (Unaudited) (Details) - Segment [Member] - USD ($)	3 Months Ended
	Dec. 31, 2025	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023
Schedule of Selected Quarterly Financial Data (Unaudited) [Line Items]
Total Investment Income	$ 30,728	$ 25,734	$ 27,417	$ 72,062	$ 420,927	$ 326,698	$ 319,654	$ 316,772	$ 518,826	$ 513,278	$ 740,055	$ 708,734
Total Operating Expenses	805,654	326,235	362,541	420,352	372,385	352,234	402,451	397,468	393,392	354,352	419,818	431,764
Income tax expense (benefit)	114	9,302	570	114	(5,206)	1,402	552	1,402	59,363	174	5,456
Net Investment Income (Loss)	(775,040)	(309,803)	(335,694)	(348,404)	53,748	(26,938)	(83,349)	(82,098)	66,071	158,752	314,781	276,970
Net Realized Gain (Loss) on Investments							(5,549,735)		(1,200)
Net Change in Unrealized Appreciation/(Depreciation)	(2,427,842)	(702,832)	(178,885)	(1,701,765)	(2,135,886)	(986,123)	4,500,937	(6,551,852)	(919,008)	(941,952)	2,160,718	(1,294,032)
Net Increase (Decrease) in Net Assets Resulting from Operations	$ (3,202,882)	$ (1,012,635)	$ (514,579)	$ (2,050,169)	$ (2,082,138)	$ (1,013,061)	$ (1,132,147)	$ (6,633,950)	$ (854,137)	$ (783,200)	$ 2,475,499	$ (1,017,062)
Net Increase (Decrease) in Net Assets from Operations per Common Share:
Basic (in Dollars per share)	$ (0.028)	$ (0.008)	$ (0.004)	$ (0.017)	$ (0.017)	$ (0.008)	$ (0.009)	$ (0.055)	$ (0.007)	$ (0.007)	$ 0.021	$ (0.008)
Diluted (in Dollars per share)	$ (0.028)	$ (0.008)	$ (0.004)	$ (0.017)	$ (0.017)	$ (0.008)	$ (0.009)	$ (0.055)	$ (0.007)	$ (0.007)	$ 0.021	$ (0.008)
Weighted Average Common Shares Outstanding - Basic (in Shares)	120,486,061	120,486,061	120,486,061	120,486,061	120,486,061	120,486,061	120,486,061	120,486,061	120,486,061	120,486,061	120,486,061	120,486,061
Weighted Average Common Shares Outstanding - Diluted (in Shares)	120,486,061	120,486,061	120,486,061	120,486,061	120,486,061	120,486,061	120,486,061	120,486,061	120,486,061	120,486,061	120,486,061	120,486,061

This element represents the net excess or deficiency of the fair value of an investment (security, contract) over or under its cost (face amount, notional amount), respectively, which excess value or deficiency has not been recognized in earnings of the entity.

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Net Increase (Decrease) in Net Assets Resulting from Operations.

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Net Investment Income (Loss).

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The aggregate amount of income from investments (for example, dividends) not considered a component of the entity's core operations.

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The amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period.

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Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Excludes Selling, General and Administrative Expense.

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PRINCETON CAPITAL CORP 10-K