XML 34 R25.htm IDEA: XBRL DOCUMENT v3.10.0.1
Note 5 - Inventory (Tables)
 9 Months Ended
Sep. 30, 2018
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
(in thousands)
  
September 30,
2018
    
December 31,
2017
  
Raw materials and supplies
   $
205
     $
298
  
Finished goods
    
309
      
346
  
Less allowance for excess and obsolete inventory and lower of cost or estimated net realizable value adjustments
    
(124
)
    
(140
)
Total inventory, net
   $
390
     $
504