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STOCK-BASED COMPENSATION (Tables)

12 Months Ended

Dec. 31, 2024

Share-Based Payment Arrangement [Abstract]

Schedule of Stock Option Activity

A summary of the stock option activity under the Company's inducement awards for the twelve months ended December 31, 2024 is as follows:

(number of shares in millions)			Number of shares						Weighted average exercise price						Weighted average remaining contractual life (years)
Options outstanding at December 31, 2023			0.7						$	13.38
Options outstanding at December 31, 2024			0.7						13.38						2.62
Options exercisable at December 31, 2024			0.5						13.38						2.62
Options vested and expected to vest			0.2						$	13.38					2.62

Schedule of Restricted Stock Units Activity

A summary of the RSU awards activity under the Company's equity plans and inducement awards, including PSU awards, for the year ended December 31, 2024 is as follows:

(number of shares in millions)			Number of shares						Weighted average grant date fair value
RSUs unvested and outstanding at December 31, 2023			4.4						$	24.37
RSUs granted			2.7						$	22.09
Less:
RSUs vested			(1.6)						$	22.98
RSUs canceled			(0.2)						$	23.58
RSUs unvested and outstanding at December 31, 2024			5.3						$	23.66

Schedule of Stock-Based Compensation Expense

Stock-based compensation expense recognized and included in the Consolidated Statements of Operations was allocated as follows:

			Years Ended December 31,
(in millions)			2024						2023						2022
Cost of revenue			$	1.6					$	1.4					$	1.7
Research and development expense			8.8						4.0						5.2
Sales and marketing expense			9.0						7.2						6.2
General and administrative expense			30.4						28.1						25.0
Total stock-based compensation expense			$	49.8					$	40.7					$	38.1

Schedule of Aggregate Intrinsic Value

The aggregate intrinsic value of options outstanding, aggregate intrinsic value of options that are fully vested and aggregate intrinsic value of RSUs vested and expected to vest is as follows:

(in millions)			December 31, 2024
Aggregate intrinsic value of options outstanding			$	0.2
Aggregate intrinsic value of options fully vested			0.2
Aggregate intrinsic value of RSUs outstanding			71.7

Schedule of Shares Purchased and Compensation Expenses for ESPP

Shares purchased under, and compensation expense associated with, the Amended and Restated 2012 Purchase Plan for the periods reported are as follows:

			Years Ended December 31,
(in millions)			2024						2023						2022
Shares purchased under the plan			0.4						0.4						0.3
Plan compensation expense			$	2.1					$	2.2					$	1.9

Schedule of Valuation Assumptions for ESPP

The fair value of shares issued under the Amended and Restated 2012 Purchase Plan that was in effect for each period reported was calculated using the Black‑Scholes option-pricing model using the weighted-average assumptions below. Each of these inputs is subjective and its determination generally requires significant judgment.

			Years Ended December 31,
			2024						2023						2022
Risk-free interest rate			5.3%						5.1%						1.4%
Expected dividend yield			—%						—%						—%
Expected life (in years)			0.5						0.5						0.5
Expected volatility			50%						56%						53%

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Schedule Of Share-Based Compensation Arrangement By Share-Based Payment Award, Aggregate Intrinsic Value

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Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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