Note 10 - Stock-based Compensation Plans and Warrants (Details) - Stock Option Activity (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013	Dec. 30, 2012	Dec. 31, 2011
Stock Option Activity [Abstract]
Balance, options outstanding	822,500	[1]	842,500	862,500	862,500
Balance, weighted-average exercise price	$ 11.82		$ 11.84	$ 11.92	$ 11.92
Balance, average remaining contractual term	3 years 146 days		4 years 6 months
Balance, aggregate intrinsic value	$ 7,181		$ 7,316
Exercisable at December 31, 2014	822,500
Exercisable at December 31, 2014	$ 11.82
Exercisable at December 31, 2014	3 years 146 days
Exercisable at December 31, 2014	7,181
Forfeited or expired	(20,000)
Forfeited or expired	$ 12.60
Forfeited or expired	6 years 73 days
Forfeited or expired	$ 135

[1] Exercise prices vary from $9.88 to $13.95, and expiration dates vary from May 2015 to December 2021.