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Income Taxes - Reconciliation of the effective income tax rate (Details)
12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Income Taxes    
Federal income tax rate 21.00% 21.00%
State tax, net of federal benefit 5.00% 5.00%
Permanent differences 3.20% 4.80%
Change in valuation allowance (30.40%) (33.60%)
Effective income tax rate (1.20%) (2.80%)