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Note 16 - Subsequent Events (Details Textual) - Common Class A [Member] - Shelf Registration [Member] - USD ($)		1 Months Ended	3 Months Ended	4 Months Ended
	May 08, 2020	May 08, 2020	Mar. 31, 2020	Dec. 31, 2019
Stock Issued During Period, Shares, New Issues (in shares)			0	448,880
Proceeds from Issuance of Common Stock, Net				$ 9,122,227
Subsequent Event [Member]
Stock Issued During Period, Shares, New Issues (in shares)	40,455	40,455
Proceeds from Issuance of Common Stock, Net		$ 649,659

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- Definition

The cash inflow from the additional capital contribution to the entity, net of offering costs.

+ References

No definition available.

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- Definition

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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-Name Accounting Standards Codification
-Topic 505
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