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Note 8 - Stockholders' Deficit (Tables)
12 Months Ended
Jun. 30, 2018
Stockholders’ deficit:  
Schedule of Warrant Activity

Warrant detail for the year ended June 30, 2018 is reflected below:

 

  

Number

of

Warrants

 

Weighted Average

Exercise

Price Per Warrant 

  Remaining Contract Term (# years)
Warrants outstanding and exercisable at June 30, 2017   2,342,590   $1.97      0.12 - 1.55  
 Warrants issued
   —     $—      —   
 Warrants exchanged
   (141,643)  $0.60    —   
 Warrants expired
   (460,157)  $2.15    —   
 Warrants outstanding and exercisable at June 30, 2018
   1,740,790   $2.03    0.74 

 

Warrant detail for the year ended June 30, 2017 is reflected below:

 

  

Number

of

Warrants

 

Weighted Average

Exercise

Price Per 

Warrant

  Remaining Contract Term (# years)
Warrants outstanding and exercisable at June 30, 2016   2,804,010   $2.00      0.39 - 2.50  
Warrants exchanged   (271,420)  $1.40    —   
Warrants expired   (190,000)  $3.00    —   
Warrants outstanding and exercisable at June 30, 2017   2,342,590   $1.97      0.12 - 1.55  

 

Schedule of Stock Option Activity

Activity in stock options during the year ended June 30, 2018 and related balances outstanding as of that date are reflected below:

 

   

Number of

Shares

   

Weighted

Average

Exercise Price

   

Weighted

Average

Remaining

Contract

Term (# years)

 
Outstanding at June 30, 2017     716,277     $ 1.10       7.09  
Granted     2,925,106       0.78          
Exercised     -                  
Forfeited and cancelled     (96,910 )   $ 0.57          
Outstanding at June 30, 2018     3,544,473     $ 0.83       8.87  
Exercisable at June 30, 2018     1,356,806     $ 0.74       7.71  

 

Activity in stock options during the year ended June 30, 2017 and related balances outstanding as of that date are reflected below:

 

   

Number of

Shares

   

Weighted

Average

Exercise Price

   

Weighted

Average

Remaining

Contract

Term (# years)

 
Outstanding at June 30, 2016     900,402     $ 1.13        
Granted     -                
Exercised     -                
Forfeited and cancelled     (184,125 )   $ 1.63        
Outstanding at June 30, 2017     716,277     $ 1.10       7.09  
Exercisable at June 30, 2017     589,476     $ 1.11       6.80  

 

Schedule of Stock-based Compensation
Years ended June 30,   2018     2017  
Research and development   $ 96,000     $ 13,000  
General and administrative     159,000       27,000  
Total stock-based compensation expense   $ 255,000     $ 40,000  
Schedule of Stock Options Valuation Assumptions
    2018     2017  
Expected volatility 138% -143%         100%  
Risk free interest rate   1.76% - 2.63% 1.31%  
Forfeiture rate 20% -2 3%     17%-24%  
Dividend yield   0%             0%  
Expected term (years) 5         3