Note 3 - Stock-Based Compensation (Details) - Restricted Stock Award Forfeitures (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended	3 Months Ended
	Sep. 30, 2013	Sep. 30, 2016 Restricted Stock [Member]	Sep. 30, 2015 Restricted Stock [Member]	Sep. 30, 2014 Restricted Stock [Member]	Sep. 30, 2013 Restricted Stock [Member]	Sep. 30, 2012 Restricted Stock [Member]	Sep. 30, 2011 Restricted Stock [Member]
Note 3 - Stock-Based Compensation (Details) - Restricted Stock Award Forfeitures [Line Items]
Date Deemed Forfeited and Recorded as Treasury Stock		February 28, 2013	February 28, 2013	February 28, 2013	September 30, 2011	September 30, 2011	September 30, 2010
Shares Forfeited	(9,716)	9,000	9,000	9,000	15,000	8,000	9,000
Expense Recovered (in Dollars)		$ 56	$ 65	$ 78	$ 101	$ 66	$ 70
Date Shares Returned to Plan		April 1, 2016	April 1, 2015	April 1, 2014	April 1, 2013	April 1, 2012	April 1, 2011