v3.25.0.1
FINANCIAL HIGHLIGHTS (Details) - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Per Share Data (1)          
Net asset value at beginning of period $ 2.91 $ 2.89 $ 2.80 $ 2.44 $ 2.05
Net investment gain (loss) 0.21 (0.07) 0.13 0.27 0.11
Net realized and unrealized gain (loss) 0.04 (0.19) (0.11) 0.54 0.41
(Provision for) benefit from income taxes (0.07) 0.07 0.00 (0.23) (0.05)
Issuance of common stock 0.00 0.07 0.00 0.00 0.00
Stock-based compensation 0.00 0.23 0.05 0.00 (0.02)
Repurchase of common stock 0.00 0.00 0.00 0.00 0.05
Other changes in equity 0.00 (0.09) 0.02 0.00 0.00
Payment of common stock dividend (0.00) (0.00) (0.00) (0.22) (0.11)
Net asset value at end of period 3.09 2.91 2.89 2.80 2.44
Ratio / Supplemental Data          
Per share market value of investments at end of period $ 2.11 $ 2.75 $ 2.70 $ 2.95 $ 1.40
Shares outstanding at end of period 6,385,255 6,385,255 6,185,255 4,795,739 4,793,739
Average weighted shares outstanding for the period 6,385,255 6,366,481 5,333,028 4,795,242 4,830,691
Net assets at end of period $ 19,757,989 $ 18,590,263 $ 17,871,560 $ 13,414,049 $ 11,640,887
Average net assets $ 19,311,001 $ 18,647,600 $ 15,639,394 $ 13,155,207 $ 10,504,563
Total investment return 6.19% 7.27% 1.43% 24.07% 23.08%
Portfolio turnover rate 29.34% 59.65% 129.57% 168.67% 61.11%
Ratio of operating expenses to average net assets (10.23%) (19.94%) (21.73%) (10.30%) (7.16%)
Ratio of net investment income (loss) to average net assets 6.86% (2.25%) 5.12% 9.89% 5.35%
Ratio of realized gains (losses) to average net assets 3.94% (3.00%) 0.85% 31.30% 0.05%