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Note 7 - Deferred Compensation and Long-term Incentive Plan (Tables)
9 Months Ended
Sep. 30, 2014
Compensation and Retirement Disclosure [Abstract]  
Schedule of Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits by Title of Individual and Type of Deferred Compensation [Table Text Block]
   

Three Months Ended

September 30,

   

Nine Months Ended

September 30,

 
   

2014

   

2013

   

2014

   

2013

 

Compensation expense

  $ 381     $ 357     $ 1,458     $ 1,042