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Stockholders' Equity (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2024
Stockholders' Equity Note [Abstract] |
Summary of compensation expense and related income tax benefit related to the stock-based compensation expense recognized | The following table summarizes the compensation expense and related income tax benefit related to the Company’s stock-based compensation arrangements recognized in the accompanying condensed consolidated statements of operations during the three months ended March 31, 2023 and 2024 (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended
​ | ​ | March 31,
​ |  | 2023 |  | 2024
Stock-based compensation expense, net of $0 tax in 2023 and 2024 | ​ | $ | 6,096 | ​ | $ | 2,629
Schedule of fair value measurement of warrants | The Company estimated the fair value of its outstanding commodity swap contracts based on the following inputs as of December 31, 2023 and March 31, 2024: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2023 | ​ | March 31, 2024
Significant Unobservable Inputs |  | Input Range |  | Weighted Average |  | Input Range |  | Weighted Average
ULSD Gulf Coast Forward Curve | ​ | $1.97 - $2.27 | ​ | $ | 2.15 | ​ | $ 2.25 - $ 2.47 | ​ | $ | 2.35
Historical Differential to PADD 3 Diesel | ​ | $0.92 - $1.62 | ​ | $ | 1.16 | ​ | $ 0.93 - $ 1.62 | ​ | $ | 1.17
Historical Differential to PADD 5 Diesel | ​ | $1.89 - $3.16 | ​ | $ | 2.48 | ​ | $ 1.98 - $ 3.16 | ​ | $ | 2.53
​ The Company estimated the fair value of embedded derivatives in its fueling agreements under the Zero Now truck financing program based on the following inputs as of December 31, 2023 and March 31, 2024: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2023 | ​ | March 31, 2024
Significant Unobservable Inputs |  | Input Range |  | Weighted Average |  | Input Range |  | Weighted Average
ULSD Gulf Coast Forward Curve | ​ | $1.97 - $2.27 | ​ | $ | 2.15 | ​ | $ 2.25 - $ 2.47 | ​ | $ | 2.35
Historical Differential to PADD 3 Diesel | ​ | $0.92 - $1.62 | ​ | $ | 1.16 | ​ | $ 0.93 - $ 1.62 | ​ | $ | 1.17
Historical Differential to PADD 5 Diesel | ​ | $1.89 - $3.16 | ​ | $ | 2.48 | ​ | $ 1.98 - $ 3.16 | ​ | $ | 2.53
Schedule of warrant activity | The following table summarizes the Amazon Warrant activities for the three months ended March 31, 2024:
​ | ​ | ​
​ | ​ | Warrant
​ |  | Shares
Outstanding and unvested as of December 31, 2023 |  | 37,613,035
Granted |  | —
Vested |  | (1,763,112)
Outstanding and unvested as of March 31, 2024 |  | 35,849,923

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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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