Note 6 - Stockholders' Equity (Details) - Dividends paid (USD $) In Thousands, except Per Share data, unless otherwise specified	1 Months Ended	3 Months Ended
	Dec. 31, 2012	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013
Dividends paid [Abstract]
Dividend amount per share	$ 0.10	$ 0.13	$ 0.13	$ 0
Total amount of dividend (in Dollars)		$ 3,363	$ 3,356	$ 0