Note 5 - Stock-based Compensation (Details) - Summary of award activity related to our common stock (Incentive Plan 2007 [Member], USD $)	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Incentive Plan 2007 [Member]
Stock options - common:
Outstanding - beginning of period	1,316,068	1,002,350
Outstanding - beginning of period (in Dollars per share)	$ 5.98	$ 7.50
Options granted		359,568
Options granted (in Dollars per share)		$ 1.99
Options exercised	(30,000)
Options exercised (in Dollars per share)	$ 3.36
Options expired	(921,500)	(32,150)
Options expired (in Dollars per share)	$ 7.64	$ 8.61
Options forfeited		(1,500)
Options forfeited (in Dollars per share)		$ 7.64
Options outstanding - end of period	364,568	1,328,268
Options outstanding - end of period (in Dollars per share)	$ 1.99	$ 5.98
Exercisable at end of period	158,510	968,700
Exercisable at end of period (in Dollars per share)	$ 1.99	$ 7.47