Note 5 - Stock-based Compensation (Detail) - Summary of award activity related to our common stock (Incentive Plan 2007 [Member], USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 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 exercised	(15,000)
Options exercised (in Dollars per share)	$ 3.11
Options expired	(921,500)	(32,150)
Options expired (in Dollars per share)	$ 7.64	$ 8.61
Outstanding - end of period	379,568	970,200
Outstanding - end of period (in Dollars per share)	$ 2.06	$ 7.47
Exercisable at end of period	20,000	970,200
Exercisable at end of period (in Dollars per share)	$ 3.23	$ 7.47