Note 7 - Stock-based Compensation (Details) - Summary of Award Activity Related to Our Common Stock (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Common stock:
Number of Shares Underlying Options	1,316,068	1,002,350	1,004,750
Weighted Average Exercise Price (in Dollars per share)	$ 5.98	$ 7.50	$ 7.51
Options exercisable at end of period	68,688	956,500	1,002,350
Options exercisable at end of period (in Dollars per share)	$ 1.99	$ 7.48	$ 7.50
Options granted		359,568
Options granted (in Dollars per share)		$ 1.99
Options exercised	(119,822)
Options exercised (in Dollars per share)	$ 2.34
Options forfeited		(8,700)	(2,400)
Options forfeited (in Dollars per share)		$ 5.32	$ 8.61
Options expired	(921,500)	(37,150)
Options expired (in Dollars per share)	$ 7.64	$ 8.72
Number of Shares Underlying Options	274,746	1,316,068	1,002,350
Weighted Average Exercise Price (in Dollars per share)	$ 1.99	$ 5.98	$ 7.50