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EARNINGS (LOSS) PER SHARE - Basic earnings per share of common stock (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Basic and diluted income (loss) per share:        
Net income (loss) $ 125,280 $ 129,191 $ 66,277 $ (72,131)
Weighted average common shares outstanding, basic 2,919,695 2,897,929 2,916,051 2,891,585
Weighted average common shares outstanding, diluted 2,919,695 2,897,929 2,916,051 2,891,585
Basic income (loss) per share (in dollars per share) $ 0.04 $ 0.04 $ 0.02 $ (0.02)
Dilutive income (loss) per share (in dollars per share) $ 0.04 $ 0.04 $ 0.02 $ (0.02)
Options outstanding 0 0 0 0