Note 7 - Investments and Fair Value of Financial Instruments - Valuation of Securities (Details) - USD ($)	Dec. 31, 2017	Jun. 30, 2017
Investments	$ 3,367,855	$ 3,578,749
Fair Value, Inputs, Level 1 [Member]
Investments	3,184,767	3,348,003
Fair Value, Inputs, Level 2 [Member]
Investments	183,088	230,746
Fair Value, Inputs, Level 3 [Member]
Investments
Money Market Funds [Member]
Investments	479,910	86,204
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Investments	479,910	86,204
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Investments
Money Market Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Investments
Mutual Fund [Member]
Investments	2,703,720	2,450,920
Mutual Fund [Member] | Fair Value, Inputs, Level 1 [Member]
Investments	2,703,720	2,450,920
Mutual Fund [Member] | Fair Value, Inputs, Level 2 [Member]
Investments
Mutual Fund [Member] | Fair Value, Inputs, Level 3 [Member]
Investments
Hedge Asset [Member]
Investments	183,088	230,746
Hedge Asset [Member] | Fair Value, Inputs, Level 1 [Member]
Investments
Hedge Asset [Member] | Fair Value, Inputs, Level 2 [Member]
Investments	183,088	230,746
Hedge Asset [Member] | Fair Value, Inputs, Level 3 [Member]
Investments
ETF [Member]
Investments		809,900
ETF [Member] | Fair Value, Inputs, Level 1 [Member]
Investments		809,900
ETF [Member] | Fair Value, Inputs, Level 2 [Member]
Investments
ETF [Member] | Fair Value, Inputs, Level 3 [Member]
Investments
Other Equities [Member]
Investments	1,137	979
Other Equities [Member] | Fair Value, Inputs, Level 1 [Member]
Investments	1,137	979
Other Equities [Member] | Fair Value, Inputs, Level 2 [Member]
Investments
Other Equities [Member] | Fair Value, Inputs, Level 3 [Member]
Investments