Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/exampleRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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Summary of Significant Accounting Policies - Concentration of Business and Credit Risk (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2026 USD ($) customer vendor	Jun. 30, 2025 customer	Jun. 30, 2026 USD ($) customer vendor	Jun. 30, 2025 customer vendor	Dec. 31, 2025 customer
Concentration Risk [Line Items]
Cash balances insured by FDIC \| $	$ 250,000		$ 250,000
Total Accounts Receivable \| Customer Concentration Risk \| Major Customers
Concentration Risk [Line Items]
Number of customers			3		1
Concentration risk percentage			52.10%		40.40%
Total Revenue \| Customer Concentration Risk \| Major Customers
Concentration Risk [Line Items]
Number of customers	1	1	1	1
Concentration risk percentage	21.80%	38.20%	26.60%	35.10%
Total Revenue \| Geographic Concentration Risk \| CALIFORNIA
Concentration Risk [Line Items]
Concentration risk percentage	46.10%	33.70%	49.70%	35.00%
Total charging equipment \| Supplier Concentration Risk \| Major Supplier
Concentration Risk [Line Items]
Concentration risk percentage	76.00%	92.80%	80.30%	91.10%
Number of vendors \| vendor	1		1	2