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Note 7 – Intangible Assets (Tables)
 12 Months Ended
Apr. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Intangible Assets and Goodwill [Table Text Block]
                      
   2023  2022
   Gross Carrying Amount  Accumulated Amortization  Net Carrying Value  Gross Carrying Amount  Accumulated Amortization  Net Carrying Value
Proprietary technology  $4,967,000   $(841,223)  $4,125,777   $1,098,000   $(219,267)  $878,733 
Non-compete agreements   81,000    (56,667)   24,333    81,000    (29,667)   51,333 
Customer relationships   39,000    (18,106)   20,894    39,000    (12,535)   26,465 
Total finite-lived assets   5,087,000    (915,996)   4,171,004    1,218,000    (261,469)   956,531 
Brand name   3,152,000    —      3,152,000    1,722,000    —      1,722,000 
Trademark   20,000    —      20,000    20,000    —      20,000 
Total indefinite-lived assets   3,172,000    —      3,172,000    1,742,000    —      1,742,000 
Total intangible assets, net  $8,259,000   $(915,996)  $7,343,004   $2,960,000   $(261,469)  $2,698,531 
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
Fiscal Year Ended:   
 2024   $866,805 
 2025    842,471 
 2026    815,271 
 2027    786,679 
 2028    644,833 
 Thereafter    214,945 
 Total   $4,171,004 
Schedule of Goodwill [Table Text Block]
  Date  Acquisition  Goodwill
 January 2020   Rotor Riot  $1,849,073 
 November 2020   Fat Shark   6,168,260 
 May 2021   Skypersonic   2,826,918 
 August 2021   Teal Drones   8,995,499 
 Balance at April 30, 2022       19,839,750 
 Impairment loss   Skypersonic   (2,826,918)
 Balance at April 30, 2023      $17,012,832