4. STOCK-BASED COMPENSATION (Details - Stock based compensation) - USD ($)	3 Months Ended
Sep. 30, 2019	Sep. 30, 2018
Stock based compensation expense	$ 76,505	$ 132,984
Cost of Goods Sold [Member]
Stock based compensation expense	11,233	0
Research and Development Expenses [Member]
Stock based compensation expense	12,684	2,411
Selling, General and Administrative Expenses [Member]
Stock based compensation expense	$ 52,588	$ 130,573

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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-Subparagraph (h)(1)(i)
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