Note 1 - Summary of Significant Interim Accounting Policies (Detail) - SARS Transactions. (USD $)	6 Months Ended
	Jun. 30, 2012
Outstanding December 31, 2011	671,500
Outstanding December 31, 2011 (in Dollars per share)	$ 10.66
Granted	135,998
Granted (in Dollars per share)	$ 13.01
Exercised	(51,602)
Exercised (in Dollars per share)	$ 9.76
Outstanding June 30, 2012	687,542
Outstanding June 30, 2012 (in Dollars per share)	$ 11.00
Stock Appreciation Rights (SARs) [Member]
Outstanding December 31, 2011	257,424
Outstanding December 31, 2011 (in Dollars per share)	$ 11.32
Granted	65,752
Granted (in Dollars per share)	$ 13.15
Exercised	(105,208)
Exercised (in Dollars per share)	$ 12.31
Cancelled	(12,396)
Cancelled (in Dollars per share)	$ 13.15
Outstanding June 30, 2012	205,572
Outstanding June 30, 2012 (in Dollars per share)	$ 11.29