Note 9 - Convertible Notes - Related Party (Details Textual)		1 Months Ended	3 Months Ended		6 Months Ended
	Jul. 12, 2020 USD ($)	Jul. 30, 2020	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Interest Expense, Related Party			$ 106,059	$ 114,226	$ 211,510	$ 227,439
Debt Instrument, Debt Default, Amount			9,675,000		9,675,000
Subsequent Event [Member]
Debt Instrument, Convertible, Number of Equity Instruments		15,000
Convertible Debt Payable to Related Party [Member]
Interest Payable, Related Party			925,855		925,855		$ 814,115
Interest Expense, Related Party			$ 59,871	$ 59,798	$ 119,739	$ 118,927
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
Convertible Debt to Related Party in Default [Member] | Subsequent Event [Member]
Debt Instrument, Convertible, Number of Equity Instruments	578,980