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Note 8 - Inventory (Tables)
3 Months Ended
Mar. 31, 2021
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   

March 31,

   

December 31,

 

(in thousands)

 

2021

   

2020

 

Total inventory

  $ 10,267     $ 11,122  
Allowance for obsolescence     (349 )     (260 )

Inventory, net of allowance

  $ 9,918     $ 10,862