Note 7 - Other Assets (Tables)

6 Months Ended

Dec. 31, 2022

Notes Tables

Schedule of Other Assets [Table Text Block]

	As of December 31, 2022		As of June 30, 2022
Prepaid expenses	$	705,809	$	630,285
Other current assets		30,025		69,262
Total	$	735,834	$	699,547

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

	December 31, 2022
	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Money market funds	$	1,062,336	$	-	$	-		$	1,062,336
Other short-term investments		536,599		-		(1,702	)		534,897
Short-term treasury bills		1,473,339		6,721		-			1,480,060
Other equities		1,246,926		22,779		-			1,269,705
Total short-term investments	$	4,319,200	$	29,500	$	(1,702	)	$	4,346,998

	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