Note 1 - Basis of Presentation (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	May 25, 2017
Net Income (Loss) Attributable to Parent	$ (13,570,000)	$ (5,645,000)	$ (20,797,000)	$ (14,440,000)
Working Capital	$ 12,200,000		12,200,000
Net Cash Provided by (Used in) Operating Activities			$ (4,867,000)	$ (4,821,000)
Percentage of Future Quarterly Interest Payments	25.00%		25.00%		50.00%
Interest Payments in Stock			$ 433,000
Stock Issued During Period, Shares, New Issues			29,706
Debt Conversion, Original Debt, Amount			$ 2,050,000
Stock Issued During Period, Shares, Conversion of Convertible Securities			285,480
Warrants Issued to Lenders [Member]
Warrants and Rights Outstanding	$ 2,900,000		$ 2,900,000		$ 2,900,000
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	357,500		357,500		357,500
Senior Secured Debt [Member]
Debt Instrument, Face Amount					$ 60,000,000
Debt Instrument, Amount to be Refinanced					45,000,000
Debt Instrument, Additional Amount after Refinance					$ 15,000,000