Significant Accounting Policies (Cash and Cash Equivalents) (Details) - USD ($)	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Accounting Policies [Abstract]
Restricted Cash	$ 255,920	$ 255,281	$ 253,135
Maximum maturity of highly liquid investments, period	90 days