XML 50 R19.htm IDEA: XBRL DOCUMENT v3.19.2
Note 3 - Inventories (Tables)
6 Months Ended
Jun. 30, 2019
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
June 30, 2019
   
December 31, 2018
 
                 
Raw materials
  $
1,655
    $
4,346
 
Finished goods
   
9,119
     
5,997
 
     
10,774
     
10,343
 
Reserve for obsolete inventory
   
(1,908
)    
(2,398
)
                 
    $
8,866
    $
7,945