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6. Income Taxes (Details - Reconciliation of Tax Rate) - USD ($)
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation    
Federal tax benefit, at statutory rate of 21% for the year ended June 30, 2019 and 34% for the year ended June 30, 2018 $ (438,706) $ (799,696)
State tax, net of federal tax benefit (50,881) (54,642)
Nondeductible expenses 4,129 6,753
R&D Credits (36,127) (36,733)
Foreign rate difference 40,660 (54,332)
Other 666 34,878
Rate reduction 51,514 661,629
Change in valuation allowance 0 55,170
Benefit for income taxes $ (428,745) $ (186,973)