Note 7 - Stock-Based Compensation (Detail) - Stock Option Activity Additional Information (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Number of Options	1,914,000	1,902,000	2,856,125	3,051,125
Weighted- Average Exercise Price (in Dollars per share)	$ 11.38	$ 11.51	$ 14.68	$ 15.28
Exercisable on December 31, 2012	1,833,500	1,718,062	2,277,625
Exercisable on December 31, 2012 (in Dollars per share)	$ 11.48	$ 11.72	$ 14.98
Exercisable on December 31, 2012	4 years 32 days
Exercisable on December 31, 2012 (in Dollars)	$ 85
Granted	70,000	60,000	110,000
Granted (in Dollars per share)	$ 3.55	$ 8.16	$ 5.71
Expired or forfeited	(58,000)	(118,125)	(303,500)
Expired or forfeited (in Dollars per share)	$ 6.33	$ 18.48	$ 17.51
Beginning of Period [Member]
Number of Options	1,902,000
Weighted- Average Exercise Price (in Dollars per share)	$ 11.51
End of Period [Member]
Number of Options	1,914,000
Weighted- Average Exercise Price (in Dollars per share)	$ 11.38
Weighted- Average Remaining Contractual Term (years)	4 years 73 days
Aggregate Intrinsic Value (in Dollars)	$ 85