Note 8 - Loss Per Common Share (Details Textual)		6 Months Ended
	Aug. 05, 2016	Jun. 30, 2017 shares	Jun. 30, 2016 shares
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	20
Stock Compensation Plan [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		1,843,211	30,385
Employee Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		1,865,865	68,640
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		152,266	152,266