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4. STOCKHOLDERS' EQUITY (June 2019 Note) (Tables)
 9 Months Ended 12 Months Ended
Mar. 31, 2020
Jun. 30, 2019
Share-based Payment Arrangement [Abstract]    
Schedule of stock-based compensation expense

The following table summarizes stock-based compensation expense for the three and nine months ended March 31, 2020 and 2019:

 

   Three Months
Ended March 31,		   Nine Months
Ended March 31,		 
   2020   2019   2020   2019 
Cost of Goods Sold  $11,233   $–   $33,699   $– 
Research and Development   21,346    2,411    46,714    7,233 
Selling, General and Administrative   42,988    480    346,365    348,870 
Stock Based Compensation Expense  $75,567   $2,891   $426,778   $356,103 
   2019   2018 
Cost of Goods Sold  $11,233   $8,669 
Research and Development Expenses   20,398    15,423 
Selling, General and Administrative Expenses   231,695    28,249 
Stock Based Compensation Expense  $263,326   $52,341 
Assumptions for fair value of options granted  
   Year Ended 
   June 30, 2019 
Assumptions:     
Option life   5.3 years 
Risk-free interest rate   3.0% 
Stock volatility   133% 
Dividend yield   0 
Weighted average fair value of grants  $0.70 
Stock option activity

The following tables summarize stock option activity for the nine months ended March 31, 2020:

 

    Options Outstanding  
    Number of
Shares		     Weighted Average
Exercise Price		     Weighted Average
Contractual Life		  
Outstanding at June 30, 2019     1,819,500     $    0.87       7.05 years  
Granted     315,000                  
Exercised     (47,500 )                
Expired or Cancelled     (14,200 )                
Outstanding at March 31, 2020     2,072,800     $ 0.95       6.82 years  
    Options Outstanding 
    Number of
Shares		    Weighted
Average
Exercise Price		    Weighted
Average
Contractual
Life		 
Outstanding at July 1, 2017   1,078,400   $0.78    7.01 years 
Grants   40,000   $0.61      
Cancellations   (62,700)  $0.99      
Outstanding at June 30, 2018   1,055,700   $0.76    6.13 years 
Grants   831,000   $0.99      
Exercised   (64,500)  $0.75      
Cancellations   (2,700)  $0.86      
Outstanding at June 30, 2019   1,819,500   $0.87    7.05 years 
Stock options outstanding by exercise price ranges

Information related to the stock options outstanding as of March 31, 2020 is as follows:

 

Range of Exercise
Prices		     Number of
Shares		     Weighted-
Average
Remaining
Contractual Life
(years)		     Weighted-
Average
Exercise
Price		     Exercisable
Number of
Shares		     Exercisable
Weighted-
Average
Exercise
Price		  
$ 0.27       40,000       1.29     $ 0.27       40,000     $ 0.27  
$ 0.48       60,000       6.00     $ 0.48       60,000     $ 0.48  
$ 0.50       100,000       5.22     $ 0.50       100,000     $ 0.50  
$ 0.55       44,000       3.96     $ 0.55       44,000     $ 0.55  
$ 0.70       100,000       8.35     $ 0.70       100,000     $ 0.70  
$ 0.73       786,000       6.56     $ 0.73       786,000     $ 0.73  
$ 0.85       6,000       2.76     $ 0.85       6,000     $ 0.85  
$ 0.90       36,000       4.19     $ 0.90       36,000     $ 0.90  
$ 1.20       207,800       1.92     $ 1.20       207,800     $ 1.20  
$ 1.25       45,000       1.25     $ 1.25       -     $ -  
$ 1.30       478,000       9.20     $ 1.30       -     $ -  
$ 1.42       100,000       9.45     $ 1.42       -     $ -  
$ 1.50       70,000       9.96     $ 1.50       70,000     $ 1.50  
$ 0.27–$1.50       2,072,800       6.82     $ 0.95       1,449,800     $ 0.79  
Range of
Exercise Prices		  Number of
Shares		   Weighted-
Average
Remaining
Contractual Life
(years)		   Weighted-
Average
Exercise Price		   Exercisable
Number of
Shares		   Exercisable
Weighted-
Average
Exercise Price		 
$0.27    40,000    2.04   $0.27    40,000   $0.27 
$0.40    15,000    7.83   $0.40    10,000   $0.40 
$0.48    60,000    6.75   $0.48    60,000   $0.48 
$0.50    100,000    5.98   $0.50    100,000   $0.50 
$0.55    46,500    4.60   $0.55    41,500   $0.55 
$0.64    25,000    8.37   $0.64    15,000   $0.64 
$0.70    100,000    9.10   $0.70    100,000   $0.70 
$0.73    801,000    7.29   $0.73    631,500   $0.73 
$0.85    6,000    3.51   $0.85    6,000   $0.85 
$0.90    6,000    4.51   $0.90    6,000   $0.90 
$0.95    30,000    5.03   $0.95    30,000   $0.95 
$1.20    207,800    2.67   $1.20    207,800   $1.20 
$1.30    381,000    9.89   $1.30    0   $1.30 
$1.35    1,200    0.40   $1.35    1,200   $1.35 
$0.27–1.35    1,819,500    7.09   $0.87    1,249,000   $0.87