Note 1 - Summary of Significant Interim Accounting Policies (Detail) - SARS Transactions (USD $)	3 Months Ended
	Mar. 31, 2013
Outstanding December 31, 2012	614,917
Outstanding December 31, 2012 (in Dollars per share)	$ 11.24
Granted	139,034
Granted (in Dollars per share)	$ 11.29
Outstanding March 31, 2013	735,568
Outstanding March 31, 2013 (in Dollars per share)	$ 11.26
Stock Appreciation Rights (SARs) [Member]
Outstanding December 31, 2012	176,476
Outstanding December 31, 2012 (in Dollars per share)	$ 11.60
Granted	59,716
Granted (in Dollars per share)	$ 11.29
Outstanding March 31, 2013	236,192
Outstanding March 31, 2013 (in Dollars per share)	$ 11.52