Note 2 - Stock-based Compensation (Detail) - Stock Option Activity (USD $)	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Outstanding, January 1	88,774	89,077
Outstanding, January 1 (in Dollars per share)	$ 26.81	$ 27.87
Granted	0	9,000
Granted (in Dollars per share)	$ 0	$ 17.55
Exercised	0	0
Exercised (in Dollars per share)	$ 0	$ 0
Forfeited	(420)	(7,549)
Forfeited (in Dollars per share)	$ 36.86	$ 29.22
Outstanding, June 30	88,354	90,528
Outstanding, June 30 (in Dollars per share)	$ 26.76	$ 26.73