Note 3 - Share-Based Compensation (Details) - Stock option activity (USD $)	3 Months Ended	6 Months Ended
	Dec. 31, 2012	Jun. 30, 2013	Jun. 30, 2012
Stock option activity [Abstract]
Options outstanding	1,790,002	1,693,334	2,145,003
Options outstanding, Weighted Average Exercise Price (in Dollars per share)	$ 1.49	$ 1.50
Options outstanding, Weighted Average Remaining Contractual Life (in years)	2 years 233 days	1 year 200 days
Options exercisable as of June 30, 2013		1,348,334
Options exercisable as of June 30, 2013 (in Dollars per share)		$ 1.49
Options exercisable as of June 30, 2013		1 year 135 days
Exercised		(46,668)
Exercised (in Dollars per share)		$ 1.20
Canceled/expired/forfeited		(50,000)
Canceled/expired/forfeited (in Dollars per share)		$ 1.60