Note 12 - Subsequent Events. (Details Textual) - USD ($)		1 Months Ended	3 Months Ended	9 Months Ended
	Aug. 25, 2017	Nov. 06, 2017	Sep. 30, 2017	Sep. 30, 2017	Sep. 30, 2016
Proceeds from Issuance of Common Stock				$ 22,500
Lincoln Park Capital Fund, LLC [Member]
Stock Issued During Period, Shares, New Issues	488,998		51,100
Proceeds from Issuance of Common Stock			$ 22,500
Stock Issued During Period, Additional Commitment Shares, New Issues			1,100
Subsequent Event [Member] | Lincoln Park Capital Fund, LLC [Member]
Stock Issued During Period, Shares, New Issues		675,000
Proceeds from Issuance of Common Stock		$ 308,745
Stock Issued During Period, Additional Commitment Shares, New Issues		15,097