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STOCK-BASED COMPENSATION (Tables)
 3 Months Ended
Mar. 31, 2025
Share-Based Payment Arrangement [Abstract]  
Schedule of Stock Option Activity
A summary of the stock option activity for the three months ended March 31, 2025 is as follows:
(number of shares in millions)Number
of
Shares		Weighted
Average
Exercise
Price
Options outstanding at December 31, 20240.7 $13.38 
Options outstanding at March 31, 20250.7 $13.38 
Options exercisable at March 31, 20250.5 $13.38 
Schedule of Restricted Stock Unit Activity
A summary of the RSU awards activity under the Company’s equity plan and inducement awards, including PSU awards, for the three months ended March 31, 2025 is as follows:
(number of shares in millions)Number
of
Shares		Weighted
Average
Grant Date
Fair Value
RSUs unvested and outstanding at December 31, 20245.3 $23.66 
RSUs granted1.6 $9.72 
Less:
RSUs vested(1.5)$25.46 
RSUs canceled(0.3)$22.80 
RSUs unvested and outstanding at March 31, 20255.1 $16.80 
Schedule of Shares Purchased and Compensation Expense Shares purchased under, and compensation expense associated with, the Amended and Restated 2012 Purchase Plan for the three months ended March 31, 2025 and 2024 are as follows:
Three months ended
March 31,
(in millions)20252024
Shares purchased under the plan
— — 
Plan compensation expense$0.5 $0.5 
Schedule of Stock-Based Compensation Expense
Stock-based compensation expense recognized and included in the Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) was allocated as follows:
Three months ended
March 31,
(in millions)20252024
Cost of revenue$0.3 $0.3 
Research and development expense2.1 1.2 
Sales and marketing expense1.5 1.9 
General and administrative expense5.6 8.6 
Total stock-based compensation expense$9.5 $12.0