Fair Value Measurements - Schedule of Fair Value Measurements on Non-recurring Basis (Details) - USD ($)	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Other non-marketable investments	$ 41,000	$ 278,000
Net loss	(119,000)	(219,000)
Level 3 [Member]
Other non-marketable investments	$ 41,000	$ 278,000