Quarterly report pursuant to Section 13 or 15(d)

Note 3 ??? Marketable Securities (Tables)

v3.22.4
Note 3 – Marketable Securities (Tables)
 9 Months Ended
Jan. 31, 2023
Investments, Debt and Equity Securities [Abstract]  
[custom:ScheduleOfAmortizedCostNetUnrealizedGainLossFairValues]
    Cost   Unrealized Gains (Losses)   Fair Value
Asset-backed securities   $ 924,509     $ (14,218 )   $ 910,291  
Corporate bonds     20,951,812       (1,132,070 )     19,819,742  
Total   $ 21,876,321     $ (1,146,288 )   $ 20,730,033  
[custom:ScheduleOfContractualMaturitiesFairValueMeasurements]
    One Year or Less   One to Three Years   Three to Five Years   Total
Asset-backed securities   $ —       $ 910,291     $ —       $ 910,291  
Corporate bonds     6,494,035       12,744,060       581,647       19,819,742  
Total   $ 6,494,035     $ 13,654,351     $ 581,647     $ 20,730,033  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
    Level 1   Level 2   Level 3   Total
Asset-backed securities   $ —       $ 910,291     $ —       $ 910,291  
Corporate bonds     —         19,819,742       —         19,819,742  
Total   $ —       $ 20,730,033     $ —       $ 20,730,033