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Stock-Based Compensation - Amazon Warrant Activities (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Jun. 14, 2021	Apr. 16, 2021
Subsidiary, Sale of Stock [Line Items]
Contra revenue charge	$ 9,600,000		$ 19,719,000	$ 34,734,000
Fuel Sales
Subsidiary, Sale of Stock [Line Items]
Contra revenue charge	6,500,000	$ 17,400,000	14,000,000	34,700,000
Volume-related, O&M services
Subsidiary, Sale of Stock [Line Items]
Contra revenue charge	3,100,000		5,700,000
Amazon Warrant
Subsidiary, Sale of Stock [Line Items]
Aggregate number of warrant shares (in shares)					5,625,959	53,141,755
Purchase obligation for fuel						$ 500,000,000
Exercise price of the warrant (in dollars per share)					$ 13.49	$ 13.49
Outstanding and unvested Beginning Balance			$ 21,157,323
Granted			0
Vested			(2,350,816)
Outstanding and unvested as of Ending Balance	18,806,507		$ 18,806,507
Number of warrants vested			2,350,816
Contra revenue charge	9,600,000	$ 17,400,000	$ 19,700,000	$ 34,700,000
Amazon Warrant | Fuel Sales
Subsidiary, Sale of Stock [Line Items]
Contra revenue charge	6,500,000		14,000,000
Amazon Warrant | Volume related fuel purchase
Subsidiary, Sale of Stock [Line Items]
Contra revenue charge	9,600,000		19,700,000
Amazon Warrant | Volume-related, O&M services
Subsidiary, Sale of Stock [Line Items]
Contra revenue charge	$ 3,100,000		$ 5,700,000

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Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

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Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
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-Section 50
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-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

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Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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-Publisher FASB
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