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Note 5 - Assets Held for Rent (Tables)
 9 Months Ended
Sep. 30, 2019
Notes Tables  
Scheduleof Assets Held for Rent [Table Text Block]
 
(In thousands)
  
September 30,
2019
  
Shippers placed in service
   $
1,577
  
Accumulated deprecation
    
(51
)
Net
    
1,526
  
Shippers and related components in production
    
1,450
  
Total
   $
2,976