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Stock-Based Compensation (Details) - USD ($)
shares in Millions, $ in Millions
3 Months Ended 9 Months Ended
Feb. 28, 2026
Feb. 28, 2025
Feb. 28, 2026
Feb. 28, 2025
Stock-Based Compensation (Details) - Schedule of stock-based compensation [Line Items]        
Stock-based compensation expense $ 2.2 $ 2.4 $ 6.6 $ 6.7
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period 0.2 0.1 0.6 0.3
Stock option expense        
Stock-Based Compensation (Details) - Schedule of stock-based compensation [Line Items]        
Stock-based compensation expense $ 0.1 $ 0.2 $ 0.6 $ 1.0
Restricted stock unit expense        
Stock-Based Compensation (Details) - Schedule of stock-based compensation [Line Items]        
Stock-based compensation expense 2.0 2.1 5.6 5.3
Management stock purchase plan        
Stock-Based Compensation (Details) - Schedule of stock-based compensation [Line Items]        
Stock-based compensation expense 0.0 0.0 0.1 0.1
Employee stock purchase plan        
Stock-Based Compensation (Details) - Schedule of stock-based compensation [Line Items]        
Stock-based compensation expense $ 0.1 $ 0.1 $ 0.3 $ 0.3