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Note 15 - Subsequent Events (Details Textual) - USD ($)				1 Months Ended	2 Months Ended	6 Months Ended
	Jul. 31, 2018	May 15, 2018	Mar. 06, 2018	Jul. 31, 2018	May 15, 2018	Jun. 30, 2018	Jun. 30, 2017
Proceeds from Issuance of Common Stock						$ 150,000,000	$ 52,467,336
Common Class A [Member]
Stock Issued During Period, Shares, New Issues		3,137,768	3,300,000
Proceeds from Issuance of Common Stock		$ 73,110,000	$ 76,890,000		$ 150,000,000
Common Class A [Member] | Shelf Registration [Member] | Cowen and Company LLC [Member]
Stock Issued During Period, Shares, New Issues						1,149,849
Proceeds from Issuance of Common Stock						$ 26,087,283
Common Class A [Member] | Subsequent Event [Member] | Shelf Registration [Member] | Cowen and Company LLC [Member]
Stock Issued During Period, Shares, New Issues				28,080
Proceeds from Issuance of Common Stock				$ 590,844
Tammy Lynn Outdoor, LLC [Member] | Common Class A [Member] | Subsequent Event [Member]
Stock Issued During Period, Shares, Acquisitions	85,170

X

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The cash inflow from the additional capital contribution to the entity.

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