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Schedule of Reconciliation of Basic and Diluted Net Income (Loss) Per Share (Details) - USD ($)
3 Months Ended 6 Months Ended
Sep. 30, 2025
Jun. 30, 2025
Sep. 30, 2024
Jun. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Income per common share:            
Net income $ 323,506 $ 241,951 $ 317,198 $ 291,039 $ 565,457 $ 608,237
Weighted avg. shares outstanding – basic 2,046,000   2,073,696   2,046,000 2,082,194
Effect of assumed exercise of dilutive stock options 30,424   44,108   28,866 44,371
Weighted avg. shares outstanding – dilutive 2,076,424   2,117,804   2,074,866 2,126,565
Basic $ 0.16   $ 0.15   $ 0.28 $ 0.29
Diluted $ 0.16   $ 0.15   $ 0.27 $ 0.29