Note 8 - Convertible Notes (Details Textual)		3 Months Ended
Jun. 12, 2020 USD ($)	Mar. 31, 2020 USD ($)
Debt Instrument, Debt Default, Amount		$ 9,675,000
Convertible Debt [Member]
Debt Instrument, Convertible, Number of Equity Instruments		3,780,823
Convertible Debt [Member] \| Subsequent Event [Member]
Debt Instrument, Convertible, Number of Equity Instruments	2,107,963
Debt Instrument, Debt Default, Amount	$ 3,412,205

The number of equity instruments that the holder of the debt instrument would receive if the debt was converted to equity.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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-Section S99
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