Significant Accounting Policies (Cash and Cash Equivalents) (Details) - USD ($)	3 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2018	Jun. 30, 2018
Accounting Policies [Abstract]
Restricted Cash	$ 255,475	$ 255,281	$ 253,404	$ 253,135
Maximum maturity of highly liquid investments, period	90 days