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Prepaid expenses and other current assets (Tables)
6 Months Ended
Sep. 30, 2023
Disclosure Text Block Supplement [Abstract]  
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block] Prepaid expenses and other current assets consist of:
   

September 30,

2023

   

March 31,

2023

 
                 

Prepaid expenses

  $ 186,722     $ 148,929  

Deferred charges

    27,720       24,720  

Other receivables

    19,228       643,976  
    $ 233,670     $ 817,625