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STOCK-BASED COMPENSATION - Schedule of Stock-Based Compensation Expense (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Share-Based Compensation Expense [Line Items]    
Total stock-based compensation expense $ 12.0 $ 7.5
Cost of testing revenue    
Share-Based Compensation Expense [Line Items]    
Total stock-based compensation expense 0.3 0.3
Research and development expense    
Share-Based Compensation Expense [Line Items]    
Total stock-based compensation expense 1.2 0.6
Selling, general, and administrative expense    
Share-Based Compensation Expense [Line Items]    
Total stock-based compensation expense $ 10.5 $ 6.6