3. Fair Value of Financial Instruments (Details 2) - USD ($)	Jun. 30, 2020	Jun. 30, 2019
Cost	$ 327,900	$ 339,400
Fair value	331,800	330,900
Unrealized holding gain (loss)	3,900	(8,500)
Equity Securities
Cost	77,600	47,100
Fair value	101,900	72,000
Unrealized holding gain (loss)	24,300	24,900
Mutual Funds
Cost	250,300	292,300
Fair value	229,900	258,900
Unrealized holding gain (loss)	$ (20,400)	$ (33,400)