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4. STOCK-BASED COMPENSATION (Tables)
3 Months Ended
Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Stock option activity
    Options Outstanding 
    Number of
Shares
    Weighted Average
Exercise Price
    Weighted Average
Contractual Life
 
Outstanding at June 30, 2017   1,078,400   $0.78    7.01 years 
Granted              
Expired or Cancelled              
Outstanding at September 30, 2017   1,078,400   $0.78    6.76 years 
Stock options outstanding by exercise price range
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    3.79   $0.27    40,000   $0.27 
$0.40    15,000    9.58   $0.40    5,000   $0.40 
$0.48    60,000    8.50   $0.48    40,000   $0.48 
$0.50    80,000    8.73   $0.50    45,000   $0.50 
$0.50    20,000    3.72   $0.50    20,000   $0.50 
$0.55    29,500    4.36   $0.55    29,500   $0.55 
$0.73    539,500    7.63   $0.73    479,500   $0.73 
$0.85    9,000    5.26   $0.85    9,000   $0.85 
$0.90    9,000    6.26   $0.90    9,000   $0.90 
$0.95    65,000    6.78   $0.95    65,000   $0.95 
$1.20    207,800    4.42   $1.20    207,800   $1.20 
$1.25    1,200    1.15   $1.25    1,200   $1.25 
$1.35    1,200    2.15   $1.35    1,200   $1.35 
$7.75    1,200    0.16   $7.75    1,200   $7.75 
$0.27–$7.75    1,078,400    6.76   $0.78    953,400   $0.81