Note 5 - Benefit Plans (Detail) - Stock Option Activity (USD $)	3 Months Ended			3 Months Ended
	Mar. 31, 2013	Mar. 31, 2013 Incentive Stock Options [Member]	Dec. 31, 2012 Incentive Stock Options [Member]	Mar. 31, 2013 Non-Incentive Stock Options [Member]
Balance outstanding		174,500	174,500	167,000
Balance outstanding weighted average exercise price (in Dollars per share)	$ 16.38
Options exercisable as of March 31, 2013		150,600		140,500
Options exercisable as of March 31, 2013 (in Dollars per share)	$ 18.21
Exercised				0
Forfeited				(2,000)
Forfeited (in Dollars per share)	$ 15.31
Balance outstanding		174,500	174,500	165,000
Balance outstanding weighted average exercise price (in Dollars per share)	$ 16.38