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Note 7 - Notes Payable (Details Textual) - USD ($)		3 Months Ended
	Feb. 28, 2018	Mar. 31, 2019	Mar. 31, 2018	Dec. 27, 2018
Proceeds from Notes Payable, Total			$ 50,000
Interest Expense, Total		1,128	208
Term Notes [Member]
Debt Instrument, Face Amount				$ 250,000
Common Stock Purchase Warrants [Member]
Warrants and Rights Outstanding, Term	5 years
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	358
Warrants issued to two current investors [Member]
Warrants and Rights Outstanding, Term				3 years
Class of Warrant or Right, Number of Securities Called by Warrants or Rights				20,000
Senior Notes [Member]
Proceeds from Notes Payable, Total	$ 50,000
Debt Instrument, Interest Rate, Stated Percentage	5.00%
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year		8,333
Long-term Debt, Maturities, Repayments of Principal in Year Two		12,500
Long-term Debt, Maturities, Repayments of Principal in Year Three		12,500
Long-term Debt, Maturities, Repayments of Principal in Year Four		12,500
Long-term Debt, Maturities, Repayments of Principal in Year Five		2,083
Interest Expense, Total		$ 621	$ 208

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