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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, 2023
Jun. 30, 2023
Sep. 30, 2022
Jun. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Income per common share:            
Net income $ 269,433 $ 465,614 $ 1,211,716 $ 1,298,672 $ 735,047 $ 2,510,388
Weighted avg. shares outstanding – basic 2,122,336   2,149,416   2,129,213 2,149,416
Effect of assumed exercise of dilutive stock options $ 52,377   $ 69,095   $ 49,506 $ 68,211
Weighted avg. shares outstanding – dilutive 2,174,713   2,218,511   2,178,719 2,217,627
Basic $ 0.13   $ 0.56   $ 0.35 $ 1.17
Diluted $ 0.12   $ 0.55   $ 0.34 $ 1.13