Note 7 - Stockholders' Equity (Detail) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2012	Dec. 31, 2011
Treasury Stock, Shares, Acquired	39,000
Treasury Stock Acquired, Average Cost Per Share (in Dollars per share)		$ 9.91
Treasury Stock, Value, Acquired, Cost Method (in Dollars)		$ 387,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period	8,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period	2,000