Note 1 - Description of Business and Summary of Significant Accounting Policies (Details Textual) - USD ($)	1 Months Ended		3 Months Ended	9 Months Ended
	Nov. 30, 2014	Oct. 31, 2013	Mar. 31, 2013	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014	Jul. 31, 2013
Term Loan [Member]
Debt Instrument, Face Amount			$ 66,000,000
Non Convertible Secured Debt [Member]
Secured Debt			30,000,000
Senior Lender [Member] | October 2013 Additional Debt Facility [Member]
Proceeds from Issuance of Secured Debt		$ 10,000,000
Net Income (Loss) Attributable to Parent				$ (16,797,000)	$ (13,775,000)
Working Capital				32,100,000
Net Cash Provided by (Used in) Operating Activities				(9,433,000)	$ (8,489,000)
Convertible Debt			36,000,000
Proceeds from Lines of Credit			$ 17,500,000
Shelf Registration Value							$ 40,000,000
Proceeds from Issuance of Common Stock	$ 14,600,000
Stock Issued During Period, Shares, New Issues	1,435,713
Shares Issued, Price Per Share	$ 10.1751
Long-term Debt, Current Maturities				36,933,000		$ 11,000
Stock Issued During Period, Value, Conversion of Convertible Securities				$ 1,007,000
Stock Issued During Period, Shares, Conversion of Convertible Securities				126,633
Fair Value of Assets Acquired				$ 755