Note 10 - Stock-based Compensation Plans and Warrants (Details) - Stock Option Transactions (USD $)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013	Dec. 30, 2012	Dec. 31, 2011
Stock Option Transactions [Abstract]
Balance, options outstanding	842,500			862,500	862,500
Balance, weighted-average exercise price	$ 11.84			$ 11.92	$ 11.92
Options exercisable at December 31, 2014	822,500
Options exercisable at December 31, 2014	$ 11.82
Weighted-average years of remaining contractual life of options outstanding at December 31, 2014	3 years 146 days
Expired or canceled, amount	20,000		20,000
Expired or canceled, weighted-average exercise price	$ 12.60		$ 15.25
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

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