Note 5 - Stockholders' Equity and Earnings Per Common Share (Detail) (USD $)	0 Months Ended	3 Months Ended		12 Months Ended
	Apr. 12, 2012	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2011
Deferred Tax Assets, Net		$ 2,240,000	$ 1,860,000
Unrealized Gain (Loss) on Marketable Securities, Cost Method Investments, and Other Investments		2,000	0
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares)		69,000	277,000
Fixed Rate Cumulative Preferred Stock issued under the Capital Purchase Program		20,000,000
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares)		167,504
Stock Redeemed or Called During Period, Value	10,000,000			10,000,000
Reduction in income available to common shareholders	$ 151,000