Note 5 - Benefit Plans (Details) - Stock Option Activity (USD $)	9 Months Ended
	Sep. 30, 2013
Note 5 - Benefit Plans (Details) - Stock Option Activity [Line Items]
Balance outstanding weighted average exercise price (in Dollars per share)	$ 16.38
Options exercisable as of September 30, 2013 (in Dollars per share)	$ 18.15
Exercised (in Dollars per share)	$ 5.23
Forfeited (in Dollars per share)	$ 16.86
Balance outstanding weighted average exercise price (in Dollars per share)	$ 16.42
Incentive Stock Options [Member]
Note 5 - Benefit Plans (Details) - Stock Option Activity [Line Items]
Balance outstanding	174,500
Options exercisable as of September 30, 2013	149,500
Exercised	(1,800)
Forfeited	(2,200)
Balance outstanding	170,500
Non-Incentive Stock Options [Member]
Note 5 - Benefit Plans (Details) - Stock Option Activity [Line Items]
Balance outstanding	167,000
Options exercisable as of September 30, 2013	104,250
Exercised	0
Forfeited	(44,500)
Balance outstanding	122,500