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Note 4 - Accounts Receivable (Tables)
12 Months Ended
Dec. 31, 2023
Notes Tables  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
  

2023

  

2022

 

Billed receivables

 $317.1  $273.7 

Unbilled receivables

  32.2   30.7 

Total receivables

  349.3   304.4 

Less allowance for doubtful accounts

  (15.1)  (14.3)

Accounts receivable, net

 $334.2  $290.1