Note 11 - Stock-based Compensation (Details) - Stock Option Activities (USD $)	3 Months Ended				6 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2012	Mar. 31, 2012	Jun. 30, 2013
Stock Option Activities [Abstract]
Outstanding	4,585,500	5,836,500	5,823,500	5,171,500	5,836,500
Outstanding, weighted average exercise price per share (in Dollars per share)	$ 0.46	$ 0.45	$ 0.55	$ 0.56	$ 0.45
Granted	0	0	750,000	675,000	0
Granted, weighted average exercise price per share (in Dollars per share)		$ 0	$ 0.28	$ 0.46
Exercised		0
Exercised, weighted average exercise price per share (in Dollars per share)		$ 0
Forfeited	(1,255,250)	(1,251,000)	(830,000)	(23,000)
Forfeited, weighted average exercise price per share (in Dollars per share)	$ 0.57	$ 0.43	$ 0.64	$ 1.10
Outstanding	3,330,250	4,585,500	5,743,500	5,823,500	3,330,250
Outstanding, weighted average exercise price per share (in Dollars per share)	$ 0.41	$ 0.46	$ 0.50	$ 0.55	$ 0.41