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

June 30,

 

December 31,

  

2021

 

2020

Trade accounts receivable, net of allowance for credit losses of $4,333 and $3,857, respectively

 $75,098 $65,684

Unbilled receivables

 33,511 26,215

Taxes receivable

 15,232 14,292

Affiliated (1)

 549 549

Other receivables

 3,541 3,867

Total accounts receivable, net

 $127,931 $110,607