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SCHEDULE OF FINANCIAL HIGHLIGHTS (Details) - USD ($)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Investment Company [Abstract]          
Net asset value $ 6.68 $ 7.99 $ 7.39 $ 11.72 $ 15.14
Net investment loss [1] (0.68) (0.58) (0.51) (0.49) (0.38)
Net realized gain/(loss) on investments [1] 1.37 (0.21) (0.46) (0.20) 8.46
Realized loss on partial repurchase of 6.00% Notes due December 30, 2026 [1] (0.01) (0.01)
Net change in unrealized appreciation/(depreciation) of investments [1] 1.33 (0.79) 1.16 (3.72) (2.39)
Dividends declared (0.50) (0.11) (8.00)
Issuance of common stock from stock dividend 0.74
Issuance of common stock from public offering [1] (0.03) 0.01 0.01
Issuance of common stock from conversion of 4.75% Convertible Notes due 2023 [1] (1.91)
Repurchase of common stock [1] 0.17 0.32 0.11
Stock-based compensation [1] (0.08) 0.11 0.09 0.07 0.05
Net asset value at end of year 8.09 6.68 7.99 7.39 11.72
Per share market value at end of year $ 9.44 $ 5.88 $ 3.94 $ 3.80 $ 12.95
Total return based on market value [2] 69.05% 49.24% 3.68% (69.45%) 60.05%
Total return based on net asset value [2] 28.59% (16.40%) 8.12% (36.01%) 30.25%
Balance, shares 25,377,756 23,601,566 25,445,805 28,429,499 31,118,556
Net Assets at End of Year $ 205,316,251 $ 157,572,086 $ 203,357,646 $ 210,020,702 $ 364,846,624
Average net assets $ 192,289,541 $ 174,438,302 $ 207,608,591 $ 310,086,061 $ 396,209,139
Ratio of net operating expenses to average net assets [3] 9.46% 10.68% 9.70% 5.87% 2.88%
Ratio of net investment loss to average net assets [3] (8.59%) (8.00%) (6.51%) (4.76%) (2.51%)
Portfolio Turnover Ratio 5.27% 13.73% 9.34% 4.31% 28.34%
[1] Based on weighted-average number of shares outstanding for the relevant period.
[2] Total return based on market value is based upon the change in market price per share between the opening and ending market values per share in the period, adjusted for dividends and equity issuances. Total return based on net asset value is based upon the change in net asset value per share between the opening and ending net asset values per share in the period, adjusted for dividends and equity issuances.
[3] For the year ended December 31, 2021, the Company excluded $100,274 of non-recurring expenses. Because the ratios are calculated for the Company’s common stock taken as a whole, an individual investor’s ratios may vary from these ratios.