STOCKHOLDERS' EQUITY - PRICING MODEL ASSUMPTIONS (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Compensation cost related to unvested stock awards not yet recognized
Compensation cost not yet recognized, net of estimated forfeitures (in dollars)	$ 65.6
Period for recognition of compensation cost on weighted average basis	32 months
Employee Stock Option
Assumptions used to estimate fair value of awards
Dividend yield (as a percent)	0.00%	0.00%	0.00%
Expected volatility range, minimum (as a percent)	72.00%	82.00%	77.00%
Expected volatility range, maximum (as a percent)	87.00%	83.00%	82.00%
Risk-free interest rate range, minimum (as a percent)	3.50%	3.42%	1.69%
Risk-free interest rate range, maximum (as a percent)	4.60%	4.94%	4.57%
Expected term range	6 years	6 years	5 years 6 months
Additional disclosures
Weighted average estimated fair value of employee stock options granted (in dollars per share)	$ 2.05	$ 1.95	$ 0.92
Employee Stock Purchase Plan
Assumptions used to estimate fair value of awards
Dividend yield (as a percent)		0.00%	0.00%	0.00%
Expected volatility range, minimum (as a percent)		72.00%	61.00%	79.00%
Expected volatility range, maximum (as a percent)		119.00%	87.00%	83.00%
Risk-free interest rate range, minimum (as a percent)		4.80%	0.40%	4.73%
Risk-free interest rate range, maximum (as a percent)		5.40%	2.79%	5.40%
Additional disclosures
Weighted average estimated fair value of other than employee stock options granted (in dollars per share)	$ 0.82	$ 1.10	$ 0.48
Employee Stock Purchase Plan \| Minimum
Assumptions used to estimate fair value of awards
Expected term range		6 months	6 months	6 months
Employee Stock Purchase Plan \| Maximum
Assumptions used to estimate fair value of awards
Expected term range		12 months	12 months	12 months

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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-Topic 718
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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The estimated measure of the maximum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The estimated measure of the minimum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The maximum risk-free interest rate assumption that is used in valuing an option on its own shares.

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The minimum risk-free interest rate assumption that is used in valuing an option on its own shares.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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