Note 4 - Accounts Receivable

12 Months Ended

Dec. 31, 2021

Notes to Financial Statements

Accounts and Nontrade Receivable [Text Block]

Accounts receivable, net consisted of the following at December 31:

	2021			2020
Billed receivables	$	395.5		$	380.5
Unbilled receivables		72.1			69.6
Total receivables		467.6			450.1
Less allowance for doubtful accounts		(21.3	)		(17.7	)
Accounts receivable, net	$	446.3		$	432.4