Note 9 - Cash Dividends (Detail) (USD $)	6 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Accelerated Dividend [Member]	Dec. 31, 2012 Additional Cash Dividend [Member]	Dec. 31, 2012 Annual Indicated Dividend [Member]
Payments of Ordinary Dividends, Common Stock (in Dollars)	$ 7,207,000	$ 2,644,000
Common Stock, Dividends, Per Share, Cash Paid			$ 0.06	$ 0.12
Dividends Payable, Amount Per Share					$ 0.24