Note 7 - Other Assets (Tables)

3 Months Ended

Sep. 30, 2021

Notes Tables

Schedule of Other Assets [Table Text Block]

	As of September 30, 2021		As of June 30, 2021
Prepaid expenses	$	292,777	$	373,381
Other current assets		25,441		26,143
Total	$	318,218	$	399,524

Schedule of Available-for-sale Securities Reconciliation [Table Text Block]

	September 30, 2021
	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Money market funds	$	1,044,775	$	5,378	$	-		$	1,050,153
Other short-term investments		269,824		1,459		-			271,283
Other equities		1,421				(215	)		1,206
Total short-term investments	$	1,316,020	$	6,837	$	(215	)	$	1,322,642

	June 30, 2021
	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Money market funds	$	1,044,748	$	5,378	$	-		$	1,050,126
Other short term investments		772,981		4,568		0			777,549
Other equities		1,421		0		(170	)		1,251
Total short-term investments	$	1,819,150	$	9,946	$	(170	)	$	1,828,926