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Note 5 - Accounts Receivable (Tables)
12 Months Ended
Dec. 31, 2021
Notes Tables  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
   

December 31,

 
   

2021

   

2020

 

Commercial

  $ 8,529     $ 7,264  

Allowance for doubtful accounts

    (62

)

    (30

)

Accounts receivable, net

  $ 8,467     $ 7,234