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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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Tabular disclosure of warrant activity.

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Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis.

+ References

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-Name Accounting Standards Codification
-Section 50
-Paragraph 2
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-SubTopic 10
-Topic 820
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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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.

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-Topic 718
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