Note 12 - Convertible Notes - Related Party (Details Textual)		3 Months Ended	12 Months Ended
	Apr. 14, 2020 USD ($)	Apr. 14, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Interest Expense, Related Party			$ 449,922	$ 430,818
Debt Instrument, Debt Default, Amount			9,675,000
Subsequent Event [Member]
Debt Instrument, Convertible, Number of Equity Instruments		130,000
Convertible Debt Payable to Related Party [Member]
Interest Payable, Related Party			814,115	588,854
Interest Expense, Related Party			$ 240,261	$ 246,568
Debt Instrument, Convertible, Number of Equity Instruments			1,599,176
Convertible Debt Payable to Related Party [Member] | Subsequent Event [Member]
Debt Instrument, Debt Default, Amount	$ 926,368	$ 926,368
Convertible Debt to Related Party in Default [Member] | Subsequent Event [Member]
Debt Instrument, Convertible, Number of Equity Instruments	578,980