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Net Income (Loss) Per Share (Tables) | 3 Months Ended
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Mar. 31, 2026
Earnings Per Share [Abstract] |
Schedule of information required to compute basic and diluted net loss per share | The following table sets forth the computations of basic and diluted income (loss) per share for the three months ended March 31, 2025 and 2026 (in thousands except share and per share amounts): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended
​ | ​ | March 31,
​ | ​ ​ ​ | 2025 | ​ ​ ​ | 2026
Net loss attributable to Clean Energy Fuels Corp. | ​ | $ | (134,967) | ​ | $ | (12,412)
​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted-average common shares outstanding |  | ​ | 223,673,947 |  | ​ | 219,667,732
Dilutive effect of potential common shares from restricted stock units, stock options and stock warrants |  | ​ | — |  | ​ | —
Weighted-average common shares outstanding - diluted |  | ​ | 223,673,947 |  | ​ | 219,667,732
Basic and diluted loss per share | ​ | $ | (0.60) | ​ | $ | (0.06)
Schedule of potentially dilutive securities that have been excluded from the diluted net loss per share calculations because their effect would have been antidilutive | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended
​ | ​ | March 31,
​ | ​ ​ ​ | 2025 | ​ ​ ​ | 2026
Stock options | ​ | ​ | 19,561,859 | ​ | ​ | 19,583,073
Stonepeak warrant shares | ​ | ​ | 20,030,806 | ​ | ​ | 20,061,061
Restricted stock units | ​ | ​ | 4,438,805 | ​ | ​ | 5,648,278
Amazon warrant shares | ​ | ​ | 58,767,714 | ​ | ​ | 58,767,714
Total | ​ | ​ | 102,799,184 | ​ | ​ | 104,060,126
​

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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