Note 10 - Stockholders' Equity (Detail) - Common, Preferred and Treasury Shares Activity	1 Months Ended	3 Months Ended
	Apr. 30, 2013	Mar. 31, 2013	Dec. 31, 2012
Balance		413,518	435,328
Treasury stock repurchase	11,579	21,810
Treasury stock retirements	(11,579)	(21,810)
Treasury stock retirements	(11,579)	(21,810)
Series G1 Preferred Stock [Member]
Balance		1,000	1,000
Series G2 Preferred Stock [Member]
Balance		1,000	1,000
Common Stock [Member]
Balance		413,518	435,328
Treasury stock retirements		(21,810)
Treasury stock retirements		(21,810)
Treasury Stock [Member]
Treasury stock repurchase		21,810
Treasury stock retirements		(21,810)
Treasury stock retirements		(21,810)