Note 10 - Stock-Based Compensation (Detail) - Summary of stock option activity (USD $)	6 Months Ended
	Jun. 30, 2012
Outstanding, June 30, 2012	4,069,207
Outstanding, June 30, 2012 (in Dollars per share)	$ 0.51
Outstanding, June 30, 2012	5 years 332 days
Exercisable, June 30, 2012	3,009,677
Exercisable, June 30, 2012 (in Dollars per share)	$ 0.60
Options [Member]
Outstanding, December 31, 2011	3,264,207
Outstanding, December 31, 2011 (in Dollars per share)	$ 0.65
Outstanding, June 30, 2012	4,069,207
Outstanding, June 30, 2012 (in Dollars per share)	$ 0.51
Outstanding, June 30, 2012	5 years 332 days
Outstanding, June 30, 2012 (in Dollars)	$ 274,644
Exercisable, June 30, 2012	3,009,677
Exercisable, June 30, 2012 (in Dollars per share)	$ 0.60
Exercisable, June 30, 2012	4 years 248 days
Exercisable, June 30, 2012 (in Dollars)	$ 128,033
Granted	1,200,000
Granted (in Dollars per share)	$ 0.25
Expired	(395,000)
Expired (in Dollars per share)	$ 0.87