Note 7 - Recapitalization - Preferred Stock Exchanged for Cash and Common Stock (Details)	9 Months Ended
	Sep. 30, 2016 $ / shares shares
Contingent Convertible Preferred Stock [Member]
Preferred Stock Exchanged, Cash Per Share (in dollars per share) | $ / shares	$ 0.165
Preferred Stock, Exchanged, Common Stock Per Share (in shares) | shares	1.95
Series B Preferred Stock [Member]
Preferred Stock Exchanged, Cash Per Share (in dollars per share) | $ / shares	$ 0.0825
Preferred Stock, Exchanged, Common Stock Per Share (in shares) | shares	2.43
Series C Preferred Stock [Member]
Preferred Stock Exchanged, Cash Per Share (in dollars per share) | $ / shares	$ 2.708
Preferred Stock, Exchanged, Common Stock Per Share (in shares) | shares	31.27
Series D Preferred Stock [Member]
Preferred Stock Exchanged, Cash Per Share (in dollars per share) | $ / shares	$ 0.36232
Preferred Stock, Exchanged, Common Stock Per Share (in shares) | shares	5.072464