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Basic and Diluted Income and Loss per Common Share (Tables)
6 Months Ended
Sep. 30, 2023
Earnings Per Share [Abstract]  
Schedule of basic and diluted net income (loss) per share
                    
   Three Months Ended   Six Months Ended 
   September 30, 2022   September 30, 2023 
Net income (loss)  $(7,529)  $(279,320)  $(147,983)  $(14,720)
Weighted-average basic shares outstanding   11,769,543    11,751,631    11,769,543    11,735,499 
Effect of dilutive securities   —      —      —      —   
Weighted-average diluted shares   11,769,543    11,751,631    11,769,543    11,735,499 
Basic net income (loss) per share  $0.00   $(0.02)  $(0.01  $0.00 
Diluted net income (loss) per share  $0.00   $(0.02)  $(0.01  $0.00 
 Antidilutive employee stock options   1,049,000    1,058,000    1,049,000    1,058,000