Note 7 - Stock-based Compensation (Detail) - Summary of award activity related to our common stock (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Common stock:
Options	1,002,350	1,004,750	1,476,491
Weighted average exercise price (in Dollars per share)	$ 7.50	$ 7.51	$ 8.28
Options exercisable at end of period	956,500	1,002,350	1,004,750
Options exercisable at end of period (in Dollars per share)	$ 7.48	$ 7.50	$ 7.51
Options granted	359,568	0	0
Options granted (in Dollars per share)	$ 1.99	$ 0	$ 0
Options exercised	0	0	0
Options exercised (in Dollars per share)	$ 0	$ 0	$ 0
Options forfeited	(8,700)	(2,400)	(74,666)
Options forfeited (in Dollars per share)	$ 5.32	$ 8.61	$ 10.37
Options expired	(37,150)		(397,075)
Options expired (in Dollars per share)	$ 8.72		$ 9.84
Options	1,316,068	1,002,350	1,004,750
Weighted average exercise price (in Dollars per share)	$ 5.98	$ 7.50	$ 7.51