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Note 3 - Accounts Receivable, Net (Tables)
9 Months Ended
Sep. 30, 2021
Notes Tables  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
  

September 30,

  

December 31,

 
  

2021

  

2020

 

Trade accounts receivable, net of allowance for credit losses of $3,718 and $3,857, respectively

 $71,680  $65,684 

Unbilled receivables

  40,125   26,215 

Taxes receivable

  15,974   14,292 

Affiliated (1)

  24   549 

Other receivables

  2,782   3,867 

Total accounts receivable, net

 $130,585  $110,607