Note 6 - Dividends (Details) (USD $)	3 Months Ended		1 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Apr. 30, 2014 Subsequent Event [Member] Paid Quarterly [Member]	Mar. 31, 2014 Paid Quarterly [Member]	Mar. 31, 2013 Paid Quarterly [Member]
Note 6 - Dividends (Details) [Line Items]
Common Stock, Dividends, Per Share, Declared				$ 0.025
Common Stock, Dividends, Per Share, Cash Paid	$ 0.025	$ 0.017	$ 0.025		$ 0.017