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Net Income Per Share (Schedule of Income Per Share) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Earnings Per Share [Abstract]    
Net income (loss) $ (6.1) $ 7.2
Average number of shares outstanding, basic 15,906 14,841
Potentially dilutive shares related to stock options 0 400
Average number of shares outstanding, diluted 15,906 15,241
Net income (loss) per common share - basic $ (0.38) $ 0.49
Net income (loss) per common share - diluted $ (0.38) $ 0.47
Antidilutive securities excluded from computation of earnings per share 118 1