Fair Value Measurements - Schedule of Fair Value Measurements on Non-recurring Basis (Details) - USD ($)	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Other non-marketable investments	$ 278,000	$ 612,000
Net loss	(219,000)	(98,000)
Level 3 [Member]
Other non-marketable investments	$ 278,000	$ 612,000