Note 3 - Share-Based Compensation (Details) - Stock option activity (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
Stock option activity [Abstract]
Options outstanding as of December 31, 2012 (in Shares)		1,790,002	1,796,669
Options outstanding as of December 31, 2012		$ 1.49
Options outstanding as of December 31, 2012	2 years	2 years 233 days
Granted at fair value	$ 1.51
Granted at fair value	$ 120,000
Exercised (in Shares)	(420,002)
Exercised	$ 1.22
Canceled/expired/forfeited (in Shares)	(75,000)
Canceled/expired/forfeited	$ 1.48
Options outstanding as of September 30, 2013 (in Shares)	1,415,000		1,796,669
Options outstanding as of September 30, 2013	$ 1.58
Options outstanding as of September 30, 2013	2 years	2 years 233 days
Options exercisable as of September 30, 2013 (in Shares)	1,266,667
Options exercisable as of September 30, 2013	$ 1.59
Options exercisable as of September 30, 2013	1 year 255 days