Other Investments, Net - Schedule of Other Investments, Net (Details) - USD ($)	Dec. 31, 2020	Jun. 30, 2020
Other investments, net	$ 35,000	$ 158,000
Private Equity Hedge Fund, at Cost [Member]
Other investments, net	35,000	97,000
Other Investments [Member]
Other investments, net		$ 61,000