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Note 8 - Stockholders' Equity (Tables)
12 Months Ended
Jun. 30, 2022
Notes Tables  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
  

Shares

  Weighted Average Exercise  Aggregate Fair Market Value at Issuance  

Weighted Average Remaining Contractual Life

 
  

(In thousands)

  

Price

  

(In thousands)

  

(in years)

 

Outstanding at June 30, 2020

  86  $5.14  $194   4.74 

Issued

  2,307   2.30   3,553   4.63 

Exercised

            

Canceled or expired

            

Outstanding at June 30, 2021

  2,393  $2.40  $3,747   4.63 

Issued

            

Exercised

            

Canceled or expired

            

Outstanding at June 30, 2022

  2,393  $2.40  $3,747   3.60 
         

Number of Shares Underlying

 
         

Warrants

 
         

(In thousands)

 
         

For the period ended June 30,

 

Issue Date

 

Classification

 

Exercise Price

 

Expiration Date

 

2022

  

2021

 

March 26, 2020

 

Equity

 $6.25 

March 25, 2025

  25   25 

March 30, 2020

 

Equity

 $4.6875 

March 27, 2025

  61   61 

October 23, 2020

 

Equity

 $2.88 

October 21, 2025

  470   470 

October 28, 2020

 

Equity

 $2.6875 

October 28, 2025

  173   173 

February 16, 2021

 

Equity

 $4.06 

February 11, 2026

  171   171 

April 12, 2021

 

Equity

 $1.875 

April 7, 2026

  1,493   1,493 

Total Outstanding

       2,393   2,393