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Note 9 - Stock Based Compensation
3 Months Ended
Mar. 31, 2016
Notes to Financial Statements  
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]
9. Stock-Based Compensation
 
The Company has a stock-based incentive plan which is administered by the Compensation Committee of the Board of Directors. Refer to Note 14 of the Notes to Consolidated Financial Statements included in the 2015 Form 10-K for further information. The Company recorded stock-based compensation expense of $0.4 million for the three months ended March 31, 2016 and $0.2 million for the three months ended March 31, 2015.
 
At March 31, 2016, total unrecognized compensation cost related to unvested common stock awards was $2.8 million. This cost is expected to be recognized over a weighted average period of 2.1 years. At March 31, 2016, there were 0.8 million shares of common stock covered by outstanding unvested common stock.