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Income Taxes (Details Narrative) - USD ($)
 12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2021
Statutory income tax rate 25.00%    
Cash saving due to utilization of payroll tax deferral     $ 325,000
Change in statutory income tax rate 20.00%    
Future taxable income $ 37,000,000    
Valuation adjustment against deferred tax asset 11,100,000    
Change in valuation allowance against deferred tax asset 3,300,000    
Deferred tax asset $ 140,000    
Statutory income tax rate 21.00% 21.00%  
Dividend paid $ 1,900,000 $ 2,800,000  
Chinese withholding tax paid 210,000 280,000  
Unpaid withholding tax 40,000 40,000  
Income tax expense $ 210,000 $ 208,000  
LATVIA      
Statutory income tax rate 25.00% 15.00%  
CN [Member] | LPOIZ      
Statutory income tax rate of China 15.00%    
Net deferred tax liability $ 465,000 $ 541,000  
Research [Member]      
Credit carry forwards $ 1,500,000    
Tax credit carryforward, description expire from 2024 through 2043