|**Note 5 - Benfit Plans (Tables)**                    | 3 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|----------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|
|**Compensation and Retirement Disclosure [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|Schedule of Net Funded Status [Table Text Block]      | Three MonthsEnded March 31,2014
        
        
        2013Service cost
        
        $
        82
        
        
        $
        146Interest cost
        
        
        101
        
        
        
        90Expected return on plan assets
        
        
        (107
        )
        
        
        (100
        )Amortization of net loss
        
        
        14
        
        
        
        66Amortization of prior service cost
        
        
        (2
        )
        
        
        (2
        )$
        88
        
        
        $
        200
|                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|Service cost                                          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|Interest cost                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|Expected return on plan assets                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|Amortization of net loss                              |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|Amortization of prior service cost                    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 

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