Note 7 - Investments and Fair Value of Financial Instruments (Tables)

3 Months Ended

Sep. 30, 2018

Notes Tables

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

	September 30, 2018
	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Money market funds	$	80,272	$	-	$	-		$	80,272
USCF mutual fund investment		2,500,000		202,440					2,702,440
Hedged asset		523,100		-		(195,784	)		327,316
Other equities		1,421		-		(506	)		915
Total investments	$	3,104,793	$	202,440	$	(196,290	)		3,110,943

	June 30, 2018
	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Money market funds	$	180,138	$	-	$	-		$	180,138
USCF mutual fund investment		2,500,000		280,480					2,780,480
Hedged asset		523,100		-		(280,761	)		242,339
Other equities		1,577		-		(529	)		1,048
Total investments	$	3,204,815	$	280,480	$	(281,290	)	$	3,204,005

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

	September 30, 2018
	Total		Level 1		Level 2		Level 3
Money market funds	$	80,272	$	80,272	$	-	$	-
USCF mutual fund investment		2,702,440		2,702,440		-		-
Hedge asset		327,316		-		327,316		-
Other equities		915		915		-		-
Total	$	3,110,943	$	2,783,627	$	327,316	$	-

	June 30, 2018
	Total		Level 1		Level 2		Level 3
Money market funds	$	180,138	$	180,138	$	-	$	-
Mutual fund investment		2,780,480		2,780,480		-		-
Hedge asset		242,339		-		242,339		-
Other equities		1,048		1,048		-		-
Total	$	3,204,005	$	2,961,666	$	242,339	$	-