Note 2 - Summary of Significant Accounting Policies (Detail) - Option Activity (USD $)	3 Months Ended
	Mar. 31, 2013
Outstanding as of December 31, 2012	2,184,583
Outstanding as of December 31, 2012 (in Dollars per share)	$ 2.20
Granted	1,052,500
Granted (in Dollars per share)	$ 0.23
Cancelled/forfeited	(25,200)
Cancelled/forfeited (in Dollars per share)	$ 2.65
Outstanding as of March 31, 2013	3,211,883
Outstanding as of March 31, 2013 (in Dollars per share)	$ 1.55
Outstanding as of March 31, 2013	7 years 219 days
Exercisable as of March 31, 2013	1,565,450
Exercisable as of March 31, 2013 (in Dollars per share)	$ 2.74
Exercisable as of March 31, 2013	5 years 328 days