Note 7 - Subsequent Events (Details Textual) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended	9 Months Ended
	Oct. 02, 2017	Dec. 31, 2017	Sep. 30, 2017	Oct. 01, 2017	May 25, 2017
Stock Issued During Period, Shares, New Issues			29,706
Derivative Liability			$ 4.5
2017 Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights			357,500		357,500
Class of Warrant or Right, Exercise Price of Warrants or Rights					$ 14.94
Scenario, Forecast [Member]
Derivative, Gain (Loss) on Derivative, Net		$ 1.2
Subsequent Event [Member] | 2017 Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	362,500			357,500
Subsequent Event [Member] | Warrants Issued to Apollo [Member]
Class of Warrant or Right, Term	5 years
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 14.94
Subsequent Event [Member] | Prior Lenders [Member]
Stock Issued During Period, Shares, New Issues	264,096
Stock Issued During Period, Value, New Issues	$ 3.3
Class of Warrant or Right, Number of Securities Called, Cancelled During Period	357,500