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Note 16 - Discontinued Operations (Tables)
 6 Months Ended
Jun. 30, 2017
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
(in thousands)
  
201
7
    
201
6
  
Warranty Reserve Balance, January 1
   $
1,369
     $
2,103
  
Additional Provision for Warranties Made During the Year
    
--
      
--
  
Settlements Made During the Year
    
(51
 )    
--
  
Decrease in Warranty Estimates for Prior Years
    
(200
 )    
(230
 )
Warranty Reserve Balance,
June 30
   $
1,118
     $
1,873