Fair Value Measurements - Schedule of Fair Value Measurements on Non-recurring Basis (Details) - USD ($)	9 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Jun. 30, 2020
Other non-marketable investments	$ 41,000		$ 278,000
Net loss	(119,000)	$ (103,000)
Level 3 [Member]
Other non-marketable investments	$ 41,000		$ 278,000