Annual report pursuant to Section 13 and 15(d)

Note 3 ??? Marketable Securities (Tables)

v3.22.2
Note 3 – Marketable Securities (Tables)
 12 Months Ended
Apr. 30, 2022
Investments, Debt and Equity Securities [Abstract]  
[custom:ScheduleOfAmortizedCostNetUnrealizedGainLossFairValues]
    Cost   Unrealized Gains (Losses)   Fair Value
Money market funds   $ 799,047     $ 889     $ 799,936  
Asset-backed securities     2,894,512       (32,953 )     2,861,559  
Corporate bonds     42,571,104       (1,442,230 )     41,128,874  
Total   $ 46,264,663     $ (1,474,294 )   $ 44,790,369  
[custom:ScheduleOfContractualMaturitiesFairValueMeasurements]
    One Year or Less   One to
Five Years		   Over Five Years   Total
Money market funds   $ 799,936     $ —       $ —       $ 799,936  
Asset-backed securities     —         2,861,559       —         2,861,559  
Corporate bonds     21,702,648       18,877,593       548,633       41,128,874  
Total   $ 22,502,584     $ 21,739,152     $ 548,633     $ 44,790,369  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
    Level 1   Level 2   Level 3   Total
Money market funds   $ 799,936     $ —       $ —       $ 799,936  
Asset-backed securities     —         2,861,559       —         2,861,559  
Corporate bonds     —         41,128,874       —         41,128,874  
Total   $ 799,936     $ 43,990,433     $ —       $ 44,790,369