Note 17 - Average Share Information (Details) - Reconciliation of Denominators of the Basic and Diluted Net Income Per Share (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Basic net income (loss) per common share
Net income (loss) applicable to common shareholders	$ 3,318	$ 1,982	$ 2,027	$ 2,028	$ 1,823	$ 22,233	$ 1,499	$ 2,176	$ 9,355		$ 27,731		$ (1,864)
Undistributed earnings allocated to participating securities									(61)		(248)
Net income (loss) allocated to common shareholders									9,294		27,483		(1,864)
Net income (loss) allocated to common shareholders									$ 9,294		$ 27,483		$ (1,864)
Weighted average basic common shares (in Shares)									12,696,777		12,658,752		12,639,379
Dilutive potential common shares (1) (in Shares)									65,108	[1]		[1]		[1]
Weighted average diluted common shares (in Shares)									12,761,885		12,658,752		12,639,379
Diluted net income (loss) per common share (in Dollars per share)	$ 0.26	$ 0.15	$ 0.16	$ 0.16	$ 0.14	$ 1.74	$ 0.12	$ 0.17	$ 0.73		$ 2.17		$ (0.15)
Basic net income (loss) per common share (in Dollars per share)	$ 0.26	$ 0.15	$ 0.16	$ 0.16	$ 0.14	$ 1.74	$ 0.12	$ 0.17	$ 0.73		$ 2.17		$ (0.15)

[1] Includes dilutive impact of restricted stock and stock options, as applicable