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Note 3 - Trade Accounts Receivable (Tables)
12 Months Ended
Dec. 31, 2024
Notes Tables  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
  

2024

  

2023

 
  

(in thousands)

 
         

Billed

 $78,521  $75,653 

Unbilled

  8,082   12,668 

Current estimated credit losses

  (6,636)  (7,717)
         

Total accounts receivable—net

 $79,967  $80,604 
Financing Receivable, Current, Allowance for Credit Loss [Table Text Block]
  

2024

  

2023

  

2022

 
  

(in thousands)

 
             

Balance—beginning of year

 $7,717  $5,381  $4,526 

Provision for bad debts

  3,074   2,396   917 

Charge-offs

  (4,155)  (60)  (62)

Recoveries

  -   -   - 
             

Balance—end of year

 $6,636  $7,717  $5,381