Note 13 - Stock-based Compensation (Details) - Stock Option Activities (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stock Option Activities [Abstract]
Outstanding	7,114,250	5,836,500	5,171,500
Outstanding, weighted average exercise price per share	$ 0.20	$ 0.45	$ 0.56
Outstanding, weighted average remaining contractual term	3 years 332 days
Granted	4,450,000	2,620,000
Granted, weighted average exercise price per share	$ 0.06	$ 0.33
Forfeited	(3,172,250)	(1,955,000)
Forfeited, weighted average exercise price per share	$ 0.47	$ 0.57
Vested and exercisable as of December 31, 2013	1,435,500
Vested and exercisable as of December 31, 2013	$ 0.46
Vested and exercisable as of December 31, 2013	2 years 94 days
Vested and expected to vest as of December 31, 2013	7,114,250
Vested and expected to vest as of December 31, 2013	$ 0.20
Vested and expected to vest as of December 31, 2013	3 years 332 days