Note 7 - Investments and Fair Value of Financial Instruments - Investments (Details) - USD ($)	Sep. 30, 2018	Jun. 30, 2018
Investments, cost	$ 3,104,793	$ 3,204,815
Investments, gross unrealized gains	202,440	280,480
Investments, gross unrealized losses	(196,290)	(281,290)
Investments	3,110,943	3,204,005
Money Market Funds [Member]
Investments, cost	80,272	180,138
Investments, gross unrealized gains
Investments, gross unrealized losses
Investments	80,272	180,138
Mutual Fund [Member]
Investments, cost	2,500,000	2,500,000
Investments, gross unrealized gains	202,440	280,480
Investments, gross unrealized losses
Investments	2,702,440	2,780,480
Hedge Asset [Member]
Investments, cost	523,100	523,100
Investments, gross unrealized gains
Investments, gross unrealized losses	(195,784)	(280,761)
Investments	327,316	242,339
Other Equities [Member]
Investments, cost	1,421	1,577
Investments, gross unrealized gains
Investments, gross unrealized losses	(506)	(529)
Investments	$ 915	$ 1,048

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

No definition available.

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- Definition

Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563

+ Details

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- Definition

Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

No definition available.

+ Details

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- Definition

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

No definition available.

+ Details

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