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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Tables) | 9 Months Ended
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Sep. 30, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Schedule of assets and liabilities measured at fair value on a recurring basis | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Fair Value Measurements Using
As of September 30, 2025 (unaudited) | ​ | Fair Value |  | Prices in active markets for identical assets (Level 1) |  | Significant other observable inputs (Level 2) |  | Significant unobservable inputs (Level 3)
Money Market Funds | ​ | $ | 269,664 | ​ | $ | 269,664 | ​ | $ | — | ​ | $ | —
ecosio Cash Earn-outs | ​ | ​ | 83,000 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 83,000
ecosio Stock Earn-outs | ​ | ​ | 23,100 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 23,100
Long-Term Investment (See Note 3) | ​ | ​ | 15,000 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 15,000
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Fair Value Measurements Using
As of December 31, 2024 | ​ | Fair Value |  | Prices in active markets for identical assets (Level 1) |  | Significant other observable inputs (Level 2) |  | Significant unobservable inputs (Level 3)
Money Market Funds | ​ | $ | 276,374 | ​ | $ | 276,374 | ​ | $ | — | ​ | $ | —
Commercial Paper | ​ | ​ | 4,920 | ​ | ​ | — | ​ | ​ | 4,920 | ​ | ​ | —
Corporate Bonds | ​ | ​ | 250 | ​ | ​ | — | ​ | ​ | 250 | ​ | ​ | —
U.S. Treasury Securities | ​ | ​ | 5,983 | ​ | ​ | — | ​ | ​ | 5,983 | ​ | ​ | —
ecosio Cash Earn-outs | ​ | ​ | 74,400 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 74,400
ecosio Stock Earn-outs | ​ | ​ | 48,100 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 48,100
Schedule of additional information on Cash and Stock Earn-outs | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Maximum | ​ | Fair Value | ​ | Fair Value
Cash Earn-outs/ Period (unaudited) | ​ | Payout | ​ | September 30, 2025 | ​ | December 31, 2024
Year 1 - December 1, 2024 - December 1, 2025 | ​ | $ | 19,600 | ​ | $ | 19,100 | ​ | $ | 17,900
Year 2 - December 1, 2025 - December 1, 2026 | ​ | ​ | 30,625 | ​ | ​ | 27,900 | ​ | ​ | 24,400
Year 3 - December 1, 2026 - December 1, 2027 | ​ | ​ | 44,130 | ​ | ​ | 36,000 | ​ | ​ | 32,100
Total Cash Earn-outs | ​ | $ | 94,355 | ​ | $ | 83,000 | ​ | $ | 74,400
​ | ​ | Maximum | ​ | Fair Value | ​ | Fair Value
Stock Earn-outs/ Period (unaudited) | ​ | Payout (1) | ​ | September 30, 2025 | ​ | December 31, 2024
Year 1 - December 1, 2024 - December 1, 2025 | ​ | $ | 12,000 | ​ | $ | 8,000 | ​ | $ | 17,200
Year 2 - December 1, 2025 - December 1, 2026 | ​ | ​ | 12,000 | ​ | ​ | 8,000 | ​ | ​ | 16,300
Year 3 - December 1, 2026 - December 1, 2027 | ​ | ​ | 11,000 | ​ | ​ | 7,100 | ​ | ​ | 14,600
Total Stock Earn-outs | ​ | $ | 35,000 | ​ | $ | 23,100 | ​ | $ | 48,100
(1) Maximum payout based on Vertex's August 6, 2024 opening share price of $37.02, as referenced in the purchase agreement.
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | As of September 30, 2025 | ​ | As of December 31, 2024
​ | (unaudited) | ​ | ​ | ​ | ​ | ​ | ​
​ | Current (1) | ​ | Non-Current (2) | ​ | Current (1) | ​ | Non-Current (2)
Cash Earn-outs | $ | 19,100 | ​ | $ | 63,900 | ​ | $ | 17,900 | ​ | $ | 56,500
Stock Earn-outs | ​ | 8,000 | ​ | ​ | 15,100 | ​ | ​ | 17,200 | ​ | ​ | 30,900
Total | $ | 27,100 | ​ | $ | 79,000 | ​ | $ | 35,100 | ​ | $ | 87,400
​
(1) Included in purchase commitment and contingent consideration liabilities, current.
(2) Included in purchase commitment and contingent consideration liabilities, net of current portion.
Summary of changes in the fair value of the Company's level 3 liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ecosio | ​ | ​ | ​
​ | ​ | Contingent Consideration | ​ | ​ | Kintsugi
​ | ​ | Cash Earn-outs | ​ | Stock Earn-outs | ​ | ​ | Long-term Investment
​ | ​ | (unaudited) | ​ | ​ | (unaudited)
Balance, January 1, 2025 | ​ | $ | 74,400 | ​ | $ | 48,100 | ​ | $ | —
Initial measurement | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 15,000
Fair value adjustments | ​ | ​ | 8,600 | ​ | ​ | (25,000) | ​ | ​ | —
Balance, September 30, 2025 | ​ | $ | 83,000 | ​ | $ | 23,100 | ​ | $ | 15,000
Ecosio |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Summary of fair value of contingent consideration and unobservable inputs used for the Monte Carlo Simulation valuation | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, 2025 (unaudited)
Liabilities |  | Fair Value |  | ​ | Valuation Technique | ​ | ​ | Unobservable Inputs
ecosio Contingent Consideration - Cash Earn-outs | ​ | $ | 83,000 | ​ | ​ | Monte Carlo Simulation | ​ | ​ | Revenue volatility | ​ | ​ | 22.5 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Revenue discount rate | ​ | ​ | 7.1 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Term (in years) | ​ | ​ | 2.4 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
ecosio Contingent Consideration - Stock Earn-outs | ​ | $ | 23,100 | ​ | ​ | Monte Carlo Simulation | ​ | ​ | Revenue volatility | ​ | ​ | 22.5 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Revenue discount rate | ​ | ​ | 7.1 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Term (in years) | ​ | ​ | 2.4 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2024
Liabilities |  | Fair Value |  | ​ | Valuation Technique | ​ | ​ | Unobservable Inputs
ecosio Contingent Consideration - Cash Earn-outs | ​ | $ | 74,400 | ​ | ​ | Monte Carlo Simulation | ​ | ​ | Revenue volatility | ​ | ​ | 21.0 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Revenue discount rate | ​ | ​ | 7.7 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Term (in years) | ​ | ​ | 3.2 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
ecosio Contingent Consideration - Stock Earn-outs | ​ | $ | 48,100 | ​ | ​ | Monte Carlo Simulation | ​ | ​ | Revenue volatility | ​ | ​ | 21.0 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Revenue discount rate | ​ | ​ | 7.7 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Term (in years) | ​ | ​ | 3.2 | ​

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- Definition Tabular disclosure of contingent payment arrangements including the terms that will result in payment and the accounting treatment that will be followed if such contingencies occur, including the potential impact on earnings per share if contingencies are to be settled in common stock of the entity. The description also may include the period over which amounts are expected to be paid, and changes in the amount since the previous reporting period. This also includes contingent options and commitments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 805 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479581/805-30-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 805 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479581/805-30-50-1 + Details
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