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Note 10 - Inventory (Tables)
12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   

December 31,

 

(in thousands)

 

2019

   

2018

 
                 

Raw materials

  $ 9,818     $ 9,560  

Work in process

    501       792  

Total inventory

    10,319       10,352  

Allowance for obsolescence

    (244 )     (265 )

Inventory, net of allowance

  $ 10,075     $ 10,087