4. STOCKHOLDERS' EQUITY (Details - Option information) - $ / shares	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Stock Options [Member]
Range of exercise prices	0.27 to 1.50
Number of shares outstanding	2,065,200	1,819,500	1,055,700
Weighted average contractual life	6 years 7 months 2 days	7 years 18 days	6 years 1 month 16 days
Weighted average exercise price	$ 0.95	$ 0.87	$ 0.76
Exercisable number of shares	1,568,879
Exercisable weighted average exercise price	$ 0.83
Option 1 [Member]
Range of exercise prices	0.27
Number of shares outstanding	40,000
Weighted average contractual life	1 year 15 days
Weighted average exercise price	$ 0.27
Exercisable number of shares	40,000
Exercisable weighted average exercise price	$ 0.27
Option 2 [Member]
Range of exercise prices	0.48
Number of shares outstanding	60,000
Weighted average contractual life	5 years 9 months
Weighted average exercise price	$ 0.48
Exercisable number of shares	60,000
Exercisable weighted average exercise price	$ 0.48
Option 3 [Member]
Range of exercise prices	0.5
Number of shares outstanding	100,000
Weighted average contractual life	4 years 11 months 19 days
Weighted average exercise price	$ 0.5
Exercisable number of shares	100,000
Exercisable weighted average exercise price	$ 0.5
Option 4 [Member]
Range of exercise prices	0.55
Number of shares outstanding	44,000
Weighted average contractual life	3 years 8 months 16 days
Weighted average exercise price	$ 0.55
Exercisable number of shares	44,000
Exercisable weighted average exercise price	$ 0.55
Option 5 [Member]
Range of exercise prices	0.7
Number of shares outstanding	100,000
Weighted average contractual life	8 years 1 month 6 days
Weighted average exercise price	$ 0.7
Exercisable number of shares	100,000
Exercisable weighted average exercise price	$ 0.7
Option 6 [Member]
Range of exercise prices	0.73
Number of shares outstanding	786,000
Weighted average contractual life	6 years 3 months 22 days
Weighted average exercise price	$ 0.73
Exercisable number of shares	786,000
Exercisable weighted average exercise price	$ 0.73
Option 7 [Member]
Range of exercise prices	0.85
Number of shares outstanding	6,000
Weighted average contractual life	2 years 6 months 3 days
Weighted average exercise price	$ 0.85
Exercisable number of shares	6,000
Exercisable weighted average exercise price	$ 0.85
Option 8 [Member]
Range of exercise prices	0.9
Number of shares outstanding	36,000
Weighted average contractual life	3 years 11 months 8 days
Weighted average exercise price	$ 0.9
Exercisable number of shares	36,000
Exercisable weighted average exercise price	$ 0.9
Option 9 [Member]
Range of exercise prices	1.2
Number of shares outstanding	200,200
Weighted average contractual life	1 year 8 months 2 days
Weighted average exercise price	$ 1.2
Exercisable number of shares	200,200
Exercisable weighted average exercise price	$ 1.2
Option 10 [Member]
Range of exercise prices	1.25
Number of shares outstanding	45,000
Weighted average contractual life	9 years 8 months 19 days
Weighted average exercise price	$ 1.25
Exercisable number of shares	0
Exercisable weighted average exercise price
Option 11 [Member]
Range of exercise prices	1.3
Number of shares outstanding	478,000
Weighted average contractual life	8 years 11 months 12 days
Weighted average exercise price	$ 1.3
Exercisable number of shares	126,679
Exercisable weighted average exercise price	$ 1.3
Option 12 [Member]
Range of exercise prices	1.42
Number of shares outstanding	100,000
Weighted average contractual life	9 years 2 months 12 days
Weighted average exercise price	$ 1.42
Exercisable number of shares	0
Exercisable weighted average exercise price
Option 13 [Member]
Range of exercise prices	1.5
Number of shares outstanding	70,000
Weighted average contractual life	9 years 5 months 9 days
Weighted average exercise price	$ 1.5
Exercisable number of shares	70,000
Exercisable weighted average exercise price	$ 1.5