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6. Income Taxes (Details - Reconciliation of Tax Rate) - USD ($)
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation    
Federal income tax, at statutory rate of 21% applied to earnings before income taxes and extraordinary items $ 4,929,611 $ 1,533,352
State tax, net of federal tax benefit 125,237 128,406
Nondeductible expenses 22,688 (45,345)
R&D Credits (56,950) (36,841)
Global intangible low-taxed income 95,419 31,060
Foreign rate difference 39,146 74,256
Other (13,523) 53,943
Forgiveness of payroll protection plan loan (102,333)
Change in valuation allowance (358,530)
Benefit for income taxes $ 5,039,295 $ 1,380,301