Note 8 - Equity Method Investments (Details Textual) - USD ($)		3 Months Ended
	Jan. 16, 2018	Jun. 30, 2018	Mar. 31, 2018	[1]
Equity Method Investments		$ 5,238,982	$ 5,032,268
Insignia [Member]
Equity Security, Number of Shares Purchased During Period	1,133,000
Equity Security, Shares Purchased, Price Per Share	$ 1.25
Equity Method Investment, Aggregate Cost	$ 1,400,000
Equity Method Investment, Ownership Percentage	26.00%	29.00%
Equity Method Investment, Number of Shares Held		3,500,000
Equity Method Investments		$ 4,801,000
Equity Method Investment, Summarized Financial Information, Net Income (Loss)		25,000
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity, Total		20,000
Fence Store LLC [Member]
Equity Method Investments		$ 437,000

[1] Derived from audited consolidated financial statements