Income Taxes - Provision for income taxes (Details) - USD ($)	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current tax expense	$ 19,300	$ (5,991)
Deferred tax expense	458,420	93,601
Income tax expense (benefit)	477,720	87,610
Valuation allowance	$ 0	$ 0