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Note 6 - Inventory (Tables)
3 Months Ended
Mar. 31, 2022
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   

March 31,

   

December 31,

 
   

2022

   

2021

 

Raw materials and supplies

  $ 1,446     $ 1,179  

Finished goods

    2,861       2,682  

Less: Reserve for excess and obsolete inventory

    (522

)

    (641

)

Total inventory, net

  $ 3,785     $ 3,220