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4. STOCK-BASED COMPENSATION (Details - Options by exercise price) - $ / shares	6 Months Ended
	Dec. 31, 2017	Jun. 30, 2017
Stock Options [Member]
Range of exercise prices	$0.27-$1.35
Number of shares outstanding	1,042,200	1,078,400
Weighted average contractual life	6 years 6 months 25 days
Weighted average exercise price	$ 0.77	$ .78
Exercisable number of shares	912,200
Exercisable weighted average exercise price	$ 0.79
Option 1 [Member]
Range of exercise prices	0.27
Number of shares outstanding	40,000
Weighted average contractual life	3 years 6 months 14 days
Weighted average exercise price	$ .27
Exercisable number of shares	40,000
Exercisable weighted average exercise price	$ 0.27
Option 2 [Member]
Range of exercise prices	0.40
Number of shares outstanding	15,000
Weighted average contractual life	9 years 3 months 29 days
Weighted average exercise price	$ 0.40
Exercisable number of shares	5,000
Exercisable weighted average exercise price	$ 0.40
Option 3 [Member]
Range of exercise prices	0.48
Number of shares outstanding	60,000
Weighted average contractual life	8 years 3 months
Weighted average exercise price	$ 0.48
Exercisable number of shares	40,000
Exercisable weighted average exercise price	$ 0.48
Option 4 [Member]
Range of exercise prices	0.50
Number of shares outstanding	80,000
Weighted average contractual life	8 years 5 months 19 days
Weighted average exercise price	$ 0.50
Exercisable number of shares	45,000
Exercisable weighted average exercise price	$ 0.50
Option 5 [Member]
Range of exercise prices	0.50
Number of shares outstanding	20,000
Weighted average contractual life	3 years 5 months 19 days
Weighted average exercise price	$ 0.50
Exercisable number of shares	20,000
Exercisable weighted average exercise price	$ 0.50
Option 6 [Member]
Range of exercise prices	0.55
Number of shares outstanding	29,500
Weighted average contractual life	4 years 1 month 10 days
Weighted average exercise price	$ 0.55
Exercisable number of shares	29,500
Exercisable weighted average exercise price	$ 0.55
Option 7 [Member]
Range of exercise prices	0.65
Number of shares outstanding	25,000
Weighted average contractual life	9 years 10 months 10 days
Weighted average exercise price	$ 0.65
Exercisable number of shares	0
Exercisable weighted average exercise price	$ 0.65
Option 8 [Member]
Range of exercise prices	0.73
Number of shares outstanding	514,500
Weighted average contractual life	7 years 4 months 17 days
Weighted average exercise price	$ 0.73
Exercisable number of shares	474,500
Exercisable weighted average exercise price	$ 0.73
Option 9 [Member]
Range of exercise prices	0.85
Number of shares outstanding	9,000
Weighted average contractual life	5 years 4 days
Weighted average exercise price	$ 0.85
Exercisable number of shares	9,000
Exercisable weighted average exercise price	$ 0.85
Option 10 [Member]
Range of exercise prices	0.90
Number of shares outstanding	9,000
Weighted average contractual life	6 years 4 days
Weighted average exercise price	$ 0.90
Exercisable number of shares	9,000
Exercisable weighted average exercise price	$ 0.90
Option 11 [Member]
Range of exercise prices	0.95
Number of shares outstanding	30,000
Weighted average contractual life	6 years 6 months 11 days
Weighted average exercise price	$ 0.95
Exercisable number of shares	30,000
Exercisable weighted average exercise price	$ 0.95
Option 12 [Member]
Range of exercise prices	1.20
Number of shares outstanding	207,800
Weighted average contractual life	4 years 2 months 1 day
Weighted average exercise price	$ 1.20
Exercisable number of shares	207,800
Exercisable weighted average exercise price	$ 1.20
Option 13 [Member]
Range of exercise prices	1.25
Number of shares outstanding	1,200
Weighted average contractual life	10 months 24 days
Weighted average exercise price	$ 1.25
Exercisable number of shares	1,200
Exercisable weighted average exercise price	$ 1.25
Option 14 [Member]
Range of exercise prices	1.35
Number of shares outstanding	1,200
Weighted average contractual life	1 year 10 months 24 days
Weighted average exercise price	$ 1.35
Exercisable number of shares	1,200
Exercisable weighted average exercise price	$ 1.35

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- Definition

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+ References

No definition available.

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- Definition

Number of options outstanding, including both vested and non-vested options.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)(2)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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