4. Selected Balance Sheet Elements (Details - Inventories) - USD ($)	Jun. 30, 2021	Jun. 30, 2020
Business Combinations [Abstract]
Raw materials	$ 700,824	$ 140,477
Work-in-progress	0	120,689
Finished goods	141,284	389,256
Inventories	$ 842,108	$ 650,422

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

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