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Income taxes (Details - Reconcilation of effective income tax rate)
3 Months Ended 9 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2022
Mar. 31, 2021
Income Tax Disclosure [Abstract]        
Federal 21.00% 21.00% 21.00% 21.00%
State (net of federal benefit) 5.45% 8.84% 5.71% 8.84%
Foreign tax rate difference (1.59%) 0.00% (0.54%) 0.00%
Permanent and temporary differences (21.59%) 737.57% (6.40%) 10.38%
Effective tax rate 3.27% 767.41% 19.77% 40.22%