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Income Taxes - Additional Information (Details) - USD ($)
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Provision for income tax expense $ 3,204 $ 7,836
State income tax payments 2,319 2,201
Foreign (Mexico) income tax payments 885 5,635
Increase (decrease) in valuation allowance (11,103)  
Accrued interest or penalties related to uncertain tax positions 0 0
Domestic Tax Authority    
Federal net operating loss carryforwards $ 15,030,000 13,800,000
Expiration date of NOLs Dec. 31, 2038  
State and Local Jurisdiction    
Federal net operating loss carryforwards $ 6,410,000 $ 6,780,000
Expiration date of NOLs Dec. 31, 2041