Fair Value Measurements - Schedule of Assets Measured at Fair Value on a Non-Recurring Basis (Details) - USD ($)	6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Other non-marketable investments	$ 35,000	$ 158,000
Net loss	(64,000)
Level 3 [Member]
Other non-marketable investments	$ 35,000	$ 158,000