Investment in Marketable Securities - Schedule of Trading Securities (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Jun. 30, 2019
Gross unrealized loss			$ (1,771,000)	$ (1,534,000)
Net unrealized loss	$ (2,367,000)	$ 681,000	(2,565,000)	$ (999,000)
Corporate Equities [Member]
Cost	8,675,000		8,675,000		$ 19,204,000
Gross unrealized gain			562,000		1,753,000
Gross unrealized loss			(6,384,000)		(11,261,000)
Net unrealized loss			(5,822,000)		(9,508,000)
Fair value	$ 2,853,000		$ 2,853,000		$ 9,696,000