v3.25.2
Stock-Based Compensation
 3 Months Ended
Aug. 31, 2025
Share-Based Payment Arrangement [Abstract]  
Stock-Based Compensation STOCK-BASED COMPENSATION
 
The following table summarizes stock-based compensation expense included in Selling, general and administrative expenses for the periods indicated: 
 Three months ended
August 31,August 31,
 20252024
Stock option expense$0.3 $0.6 
Restricted stock unit expense1.5 1.5 
Management stock purchase plan0.0 0.0 
Employee stock purchase plan0.1 0.1 
Total stock-based compensation expense$1.9 $2.2 

The following table sets forth Common Stock issued pursuant to stock-based compensation plans for the periods indicated:
 Three months ended
August 31,August 31,
 20252024
Common Stock issued pursuant to stock-based compensation plans (in millions)0.10.1