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STOCK-BASED COMPENSATION (Tables) | 6 Months Ended
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Jun. 30, 2025
Share-Based Payment Arrangement [Abstract] |
Schedule of Stock Option Activity | A summary of the stock option activity for the six months ended June 30, 2025 is as follows:
(number of shares in millions) | Number of Shares |  | Weighted Average Exercise Price
Options outstanding at December 31, 2024 | 0.7 |  |  | $ | 13.38 |
Options outstanding at June 30, 2025 | 0.7 |  |  | $ | 13.38 |
Options exercisable at June 30, 2025 | 0.5 |  |  | $ | 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 six months ended June 30, 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, 2024 | 5.3 |  |  | $ | 23.66 |
RSUs granted | 4.3 |  |  | $ | 6.95 |
Less: |  |  |
RSUs vested | (1.6) |  |  | $ | 25.21 |
RSUs canceled | (0.4) |  |  | $ | 20.84 |
RSUs unvested and outstanding at June 30, 2025 | 7.6 |  |  | $ | 12.55 |
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 and six months ended June 30, 2025 and 2024 are as follows:
| Three months ended June 30, | Six months ended June 30,
(in millions) | 2025 |  |  | 2024 |  | 2025 |  |  | 2024
Shares purchased under the plan | 0.7 |  |  |  | 0.2 |  |  | 0.7 |  |  |  | 0.2 |
Plan compensation expense | $ | 0.3 |  |  |  | $ | 0.5 |  |  | $ | 0.8 |  |  |  | $ | 1.0 |
Schedule of Stock-Based Compensation Expense | Stock-based compensation expense recognized and included in the Condensed Consolidated Statements of Operations and Comprehensive Loss was allocated as follows:
| Three months ended June 30, |  | Six months ended June 30,
(in millions) | 2025 |  |  | 2024 |  | 2025 |  |  | 2024
Cost of revenue | $ | 0.3 |  |  |  | $ | 0.4 |  |  | $ | 0.6 |  |  |  | $ | 0.7 |
Research and development expense | 2.0 |  |  |  | 1.6 |  |  | 4.1 |  |  |  | 2.8 |
Sales and marketing expense | 2.0 |  |  |  | 2.6 |  |  | 3.5 |  |  |  | 4.5 |
General and administrative expense | 6.4 |  |  |  | 9.9 |  |  | 12.0 |  |  |  | 18.5 |
Total stock-based compensation expense | $ | 10.7 |  |  |  | $ | 14.5 |  |  | $ | 20.2 |  |  |  | $ | 26.5 |

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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