Note 11 - Fair Value Measures (Details) - Summary of Changes in Convertible Notes, Warrants, Options (USD $)	1 Months Ended		0 Months Ended		1 Months Ended		4 Months Ended	6 Months Ended		12 Months Ended		0 Months Ended	1 Months Ended			4 Months Ended						0 Months Ended	1 Months Ended		4 Months Ended						0 Months Ended	1 Months Ended			4 Months Ended				1 Months Ended	4 Months Ended	0 Months Ended	1 Months Ended				1 Months Ended				0 Months Ended	1 Months Ended		1 Months Ended				4 Months Ended	12 Months Ended					1 Months Ended		4 Months Ended						0 Months Ended	1 Months Ended		4 Months Ended				0 Months Ended	1 Months Ended		1 Months Ended
	Jun. 30, 2014	May 27, 2014	Apr. 14, 2014	Jan. 16, 2013	Mar. 31, 2013	Feb. 22, 2013	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Jun. 12, 2014 2011 Warrants [Member]	Jun. 30, 2014 2011 Warrants [Member]	Mar. 31, 2013 2011 Warrants [Member]	Feb. 22, 2013 2011 Warrants [Member]	Jun. 30, 2013 2011 Warrants [Member]	May 27, 2014 2011 Warrants [Member]	Apr. 14, 2014 2011 Warrants [Member]	Dec. 31, 2013 2011 Warrants [Member]	Jan. 16, 2013 2011 Warrants [Member]	Dec. 31, 2012 2011 Warrants [Member]	Jun. 12, 2014 2012 Warrants [Member]	Jun. 30, 2014 2012 Warrants [Member]	Feb. 22, 2013 2012 Warrants [Member]	Jun. 30, 2013 2012 Warrants [Member]	May 27, 2014 2012 Warrants [Member]	Apr. 14, 2014 2012 Warrants [Member]	Dec. 31, 2013 2012 Warrants [Member]	Jan. 16, 2013 2012 Warrants [Member]	Dec. 31, 2012 2012 Warrants [Member]	Jan. 16, 2013 Third Tranche Warrants [Member]	Feb. 22, 2013 Third Tranche Warrants [Member]	Jun. 30, 2014 February 2013 Warrants [Member]	Feb. 22, 2013 February 2013 Warrants [Member]	Jun. 30, 2013 February 2013 Warrants [Member]	May 27, 2014 February 2013 Warrants [Member]	Apr. 14, 2014 February 2013 Warrants [Member]	Dec. 31, 2013 February 2013 Warrants [Member]	Feb. 22, 2013 February 2013 SPA Option [Member]	Jun. 30, 2013 February 2013 SPA Option [Member]	Jun. 12, 2014 September 2013 Warrants [Member]	Jun. 30, 2014 September 2013 Warrants [Member]	May 27, 2014 September 2013 Warrants [Member]	Apr. 14, 2014 September 2013 Warrants [Member]	Dec. 31, 2013 September 2013 Warrants [Member]	Jun. 30, 2014 September 2013 SPA Option [Member]	May 27, 2014 September 2013 SPA Option [Member]	Apr. 14, 2014 September 2013 SPA Option [Member]	Dec. 31, 2013 September 2013 SPA Option [Member]	Apr. 14, 2014 April 2014 Warrants [Member]	Jun. 30, 2014 April 2014 Warrants [Member]	May 27, 2014 April 2014 Warrants [Member]	Jun. 30, 2014 May 2014 Warrants [Member]	May 27, 2014 May 2014 Warrants [Member]	Jun. 30, 2014 2011 Convertible Notes [Member]	Feb. 22, 2013 2011 Convertible Notes [Member]	Jun. 30, 2013 2011 Convertible Notes [Member]	Dec. 31, 2013 2011 Convertible Notes [Member]	May 27, 2014 2011 Convertible Notes [Member]	Apr. 14, 2014 2011 Convertible Notes [Member]	Jan. 16, 2013 2011 Convertible Notes [Member]	Dec. 31, 2012 2011 Convertible Notes [Member]	Jun. 30, 2014 2012 Convertible Notes [Member]	Feb. 22, 2013 2012 Convertible Notes [Member]	Jun. 30, 2013 2012 Convertible Notes [Member]	May 27, 2014 2012 Convertible Notes [Member]	Apr. 14, 2014 2012 Convertible Notes [Member]	Dec. 31, 2013 2012 Convertible Notes [Member]	Jan. 16, 2013 2012 Convertible Notes [Member]	Dec. 31, 2012 2012 Convertible Notes [Member]	Jan. 16, 2013 Third Tranche Convertible Notes [Member]	Jun. 30, 2014 Third Tranche Convertible Notes [Member]	Feb. 22, 2013 Third Tranche Convertible Notes [Member]	Jun. 30, 2013 Third Tranche Convertible Notes [Member]	May 27, 2014 Third Tranche Convertible Notes [Member]	Apr. 14, 2014 Third Tranche Convertible Notes [Member]	Dec. 31, 2013 Third Tranche Convertible Notes [Member]	Apr. 14, 2014 April 2014 Convertible Notes [Member]	Jun. 30, 2014 April 2014 Convertible Notes [Member]	May 27, 2014 April 2014 Convertible Notes [Member]	Jun. 30, 2014 May 2014 Convertible Notes [Member]	May 27, 2014 May 2014 Convertible Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Balance	$ 4,663,000	$ 7,793,000	$ 7,536,000	$ 12,592,000		$ 17,490,000	$ 11,064,000	$ 4,663,000	$ 11,064,000	$ 7,217,000	$ 11,898,000				$ 3,916,000	$ 1,809,000	$ 179,000	$ 179,000	$ 179,000	$ 2,000,000	$ 2,000,000			$ 1,632,000	$ 979,000	$ 141,000	$ 141,000	$ 141,000	$ 1,800,000	$ 1,800,000	$ 300,000			$ 2,759,000	$ 2,017,000	$ 1,441,000	$ 1,441,000	$ 1,441,000	$ 1,211,000	$ 404,000			$ 627,000	$ 627,000	$ 627,000		$ 292,000	$ 292,000	$ 292,000	$ 58,000	$ 4,000	$ 58,000	$ 6,000	$ 3,000	$ 3,010,000	$ 6,070,000	$ 4,380,000	$ 3,290,000	$ 3,290,000	$ 3,290,000	$ 6,510,000	$ 6,510,000	$ 930,000	$ 1,516,000	$ 1,180,000	$ 1,010,000	$ 1,010,000	$ 1,010,000	$ 1,588,000	$ 1,588,000	$ 394,000	$ 232,000	$ 386,000	$ 295,000	$ 237,000	$ 237,000	$ 237,000	$ 261,000	$ 242,000	$ 261,000	$ 239,000	$ 254,000
Allocation of initial proceeds		250,000	250,000	250,000																											108,000																			45,000				3,000																	142,000							205,000				247,000
Amortization of debt discount	8,000					95,000		8,000	95,000																																															38,000								55,000									2,000						8,000
Settlement of warrants	(851,000)											(120,000)	(120,000)									(47,000)	(47,000)										(480,000)								(204,000)	(204,000)
Exercise of warrants					(1,731,000)									(1,731,000)
Conversion of debentures										(450,000)																																																(450,000)
Fair value adjustment	(2,287,000)	7,000	69,000	444,000		(450,000)	(4,245,000)						(59,000)			(376,000)							(94,000)		(653,000)						192,000		(961,000)		(742,000)					(807,000)		(423,000)				(292,000)				13,000	(54,000)		3,000		(280,000)	(370,000)	(1,240,000)						(80,000)	(72,000)	(336,000)						252,000	(5,000)	(8,000)	(91,000)				56,000	(27,000)		(15,000)	7,000
Carrying value of old debt at modification						(8,137,000)																																																		(6,178,000)								(1,571,000)									(388,000)
Fair value of new debt at modification						7,972,000																																																		6,070,000								1,516,000									386,000
Modification of warrants						2,548,000									1,916,000									632,000
Cancellation/retirement of warrants						(1,100,000)																		(800,000)								(300,000)
Fair value of instruments at issuance						$ 3,970,000																												$ 2,759,000					$ 1,211,000