4. STOCKHOLDERS' EQUITY (Details - Option activity) - Stock Options [Member] - $ / shares	3 Months Ended	12 Months Ended
Sep. 30, 2019	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Stock option activity
Number of stock options outstanding	1,819,500	1,055,700	1,078,400
Number of options granted	200,000	831,000	40,000
Number of options exercised	(12,500)	(64,500)
Number of options cancelled		(2,700)	(62,700)
Number of stock options outstanding	2,007,000	1,819,500	1,055,700	1,078,400
Weighted average exercise price	$ 0.87	$ 0.76	$ 0.78
Weighted average exercise price - grants		0.99	0.61
Weighted average exercise price - exercised		0.75
Weighted average exercise price - cancelled		0.86	0.99
Weighted average exercise price	$ 0.92	$ 0.87	$ 0.76	$ 0.78
Weighted average contractual life	7 years 1 month 28 days	7 years 1 month 2 days	6 years 1 month 16 days	7 years 4 days

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Net number of share options (or share units) granted during the period.

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

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-Name Accounting Standards Codification
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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