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Income Taxes - Reconciliation of the effective income tax rate (Details)
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Income Taxes    
Federal income tax rate 21.00% 21.00%
State tax, net of federal benefit 5.00% 5.00%
Permanent differences 3.00% 3.20%
Change in valuation allowance (30.10%) (30.40%)
Effective income tax rate (1.10%) (1.20%)