Note 7 - Other Assets (Tables)

3 Months Ended

Sep. 30, 2022

Notes Tables

Schedule of Other Assets [Table Text Block]

	As of September 30, 2022		As of June 30, 2022
Prepaid expenses	$	703,333	$	630,285
Other current assets		19,211		69,262
Total	$	722,544	$	699,547

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

	September 30, 2022
	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Money market funds	$	1,054,730	$	-	$	-		$	1,054,730
Other short-term investments		532,407		-		(1,541	)		530,866
Short-term treasury bills		2,463,494		1,591		-			2,465,085
Other equities		1,246,926		-		(85,281	)		1,161,645
Total short-term investments	$	5,297,557	$	1,591	$	(86,822	)	$	5,212,326

	June 30, 2022
	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Money market funds	$	1,051,017	$	-	$	-		$	1,051,017
Other short term investments		271,346		-		(1,919	)		269,427
Short-term treasury bills		2,470,020		-		(4,156	)		2,465,864
Other equities		1,246,926		32,697		-			1,279,623
Total short-term investments	$	5,039,309	$	32,697	$	(6,075	)	$	5,065,931