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Note 16 - Warrants (Tables)
12 Months Ended
Jun. 30, 2025
Notes Tables  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
          

Remaining

    
  

Number

      

Contractual

    

Description

 

Outstanding

  

Exercise Price

  

Life in Years (7)

 

Type

 

Classification

December 2020 Warrants (1)

  15,571  $150.00   0.5 

Warrant

 

Equity

January 2022 Warrants (1)

  122,092  $8.60   1.6 

Warrant

 

Liability

March 2022 Warrants (1)

  333,300  $26.00   2.2 

Warrant

 

Liability

August 2022 Warrants (1)

  1,191,811  $2.32   2.1 

Warrant

 

Liability

June 2023 Tranche A Warrants (2)

  2,173,912  $1.59   3.0 

Warrant

 

Liability

June 2023 Tranche B Prefunded Warrants (3)

  1,630,434  $0.0001   N/A 

Prefunded Warrant

 

Liability

June 2023 Prefunded Warrants (4)

  430,217  $0.0001   N/A 

Prefunded Warrant

 

Liability

June 2025 Prefunded Warrants (5)(6)

  8,233,332  $0.0001   N/A 

Prefunded Warrant

 

Liability

Total outstanding June 30, 2025 (6)

  14,130,669            
        

Weighted-

 
        

Average

 
     

Weighted-

  

Remaining

 
  

Number of

  

Average

  

Contractual

 
  

Warrants

  

Exercise Price

  

Life in Years

 

Outstanding June 30, 2024 (1)

  3,839,229  $4.95   3.6 

Warrants expired

  (2,543)  N/A   N/A 

Outstanding June 30, 2025 (2)

  3,836,686  $4.76   2.6 
  

Number of

  

Weighted-

 
  

Prefunded

  

Average

 
  

Warrants

  

Exercise Price

 

Outstanding June 30, 2024

  2,236,651  $0.0001 

Prefunded warrants issued (1)(2)

  8,233,332  $0.0001 

Prefunded warrants exercised

  (176,000) $0.0001 

Outstanding June 30, 2025 (2)

  10,293,983  $0.0001