Note 2 - Summary of Significant Accounting Policies (Details) - shares		3 Months Ended	12 Months Ended
	Jan. 16, 2016	Mar. 31, 2018	Dec. 31, 2017
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items]
Stockholders' Equity, Reverse Stock Split	1 for 101
Employee Stock Option [Member]
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		142,653	142,653
Warrant [Member]
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		67,879	67,879