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Note 3 - Investments (Details Textual)			1 Months Ended	12 Months Ended
Note 3 - Investments (Details Textual)	May 25, 2018 shares	Jul. 10, 2017 shares	Aug. 31, 2017 USD ($)	Jul. 02, 2017 USD ($)	Jul. 01, 2018 USD ($) shares
Short-term Investments, Total				$ 2,951,315	$ 2,157,875
Windstream [Member]
Investment Owned, Balance, Shares \| shares	135				135
Frontier Communications [Member]
Investment Owned, Balance, Shares \| shares		300			300
Windstream [Member] \| Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	5
Frontier Communications [Member] \| Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio		15
Mutual Fund [Member]
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax, Total					$ 39,450
Available-for-sale Securities, Total				2,817,392	1,824,846
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax, Total				17,248
Redemption of Securities to Meet Dividend Payment			$ 1,000,000
Equity Securities [Member]
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax, Total				4,298	8,398
Available-for-sale Securities, Total				5,272,318	4,816,804
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax, Total				3,996,702	3,545,288
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss, Total				$ 4,298	$ 8,398
Minimum [Member]
Short-term Investments Maturities Term				90 days
Maximum [Member]
Short-term Investments Maturities Term				1 year