Note 7 - Stockholders' Equity (Detail) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Stock Issued During Period, Shares, Share-based Compensation, Gross	303,000
Warrants Exercised During Period	40,000
Stock Issued During Period, Shares, Restricted Stock Award, Gross	231,000
Stock Issued During Period, Value, Restricted Stock Award, Gross (in Dollars)	$ 3.2
Treasury Stock, Shares	905,349	905,349
Treasury Stock Acquired, Average Cost Per Share (in Dollars per share)	$ 9.38
Stock Repurchase Program, Remaining Authorized Repurchase Amount (in Dollars)	$ 10.2