Quarterly report pursuant to Section 13 or 15(d)

Stockholders??? Equity (Tables)

v3.21.1
Stockholders’ Equity (Tables)
9 Months Ended
Feb. 28, 2021
Stockholders' Equity Note [Abstract]  
Share-based Payment Arrangement, Option, Exercise Price Range [Table Text Block]
The following table summarizes the significant terms of warrants outstanding at February 28, 2021. This table does not include the unit warrants. See Unit Warrants section below.


Range of 

exercise

prices

   

Number of 

warrants

outstanding

   

Weighted 

average

remaining

contractual

life (years)

   

Weighted 

average

exercise

price of

outstanding 

warrants

   

Number of

warrants 

exercisable

   

Weighted

average

exercise

price of

exercisable 

warrants

 

$

0.49

     

33,465,110

     

0.75

   

$

0.49

     

33,465,110

   

$

0.49

 
 

0.50

     

2,736,500

     

0.98

     

0.50

     

2,736,500

     

0.50

 
 

0.60

     

17,500,000

     

0.75

     

0.60

     

17,500,000

     

0.60

 
 

0.75

     

412,500

     

0.01

     

0.75

     

412,500

     

0.75

 
 

1.10

     

296,035

     

0.82

     

1.10

     

296,035

     

1.10

 
         

54,410,145

     

0.76

   

$

0.53

     

54,410,145

   

$

0.53

 
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
Transactions involving warrants are summarized below. This table does not include the unit warrants. See Unit Warrants sections below.


   

Number of

Shares

   

Weighted

Average

Exercise

Price

 

Warrants outstanding at May 31, 2019

    54,818,985     $ 0.53  

Granted

    16,160     $ 1.10  

Exercised

    -          

Cancelled / Expired

    -     $ -  
                 

Warrants outstanding at May 31, 2020

    54,838,145     $ 0.53  

Granted

    -     $ -  

Exercised

    -     $ -  

Cancelled / Expired

    (425,000

)

  $ 0.75  

Warrants outstanding at February 28, 2021

    54,410,145     $ 0.53