Note 9 - Loans Payable (Details Textual) - USD ($)	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Debt Instrument, Debt Default, Amount	$ 9,675,000
Equipment Pledged as Collateral	9,000
Stock Issued During Period, Value, New Issues	$ 131,878
Individual Lenders [Member]
Stock Issued During Period, Shares, New Issues	76,400	0
Stock Issued During Period, Value, New Issues	$ 54,388

Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

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