Note 4 - Repurchase of Equity Securities (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended	9 Months Ended
	Jul. 31, 2015	Sep. 30, 2015	Sep. 30, 2015
Stock Repurchase Program, Number of Shares Authorized to be Repurchased	1,000,000
Stock Repurchase Program, Period in Force	3 years
Treasury Stock, Shares, Acquired		245,979
Treasury Stock Acquired, Average Cost Per Share		$ 19.11
Treasury Stock, Value, Acquired, Cost Method		$ 4,700	$ 4,702
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased		800,000	800,000