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Revenue
 9 Months Ended
Sep. 30, 2025
Revenue from Contract with Customer [Abstract]  
Revenue

Note 4.  Revenue

We disaggregate our revenue from customers by the type of arrangement, primarily from the sale of battery products and energy storage system products as well as from providing research and development services, as this depicts how the nature, amount, timing, and cash flows are affected by economic factors. The following table summarizes the Company’s disaggregated revenue:

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Three Months Ended September 30, 

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Nine Months Ended September 30, 

(in thousands)

2025

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2024

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2025

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2024

Revenue from customers:

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Service revenue

$

3,897

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$

—

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$

13,209

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$

—

Product revenue

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3,221

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—

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3,229

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—

Total revenue from customers

$

7,118

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$

—

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$

16,438

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$

—

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Remaining Performance Obligations

We have performance obligations associated with commitments in customer contracts for future services that have not yet been recognized as revenue. As of September 30, 2025, the aggregate amount of the transaction price allocated to the remaining performance obligations

related to customer contracts that were unsatisfied or partially unsatisfied, was $0.3 million, which is expected to be recognized as revenue within the next twelve months. This amount does not include contracts to which the customer is not committed. The estimated timing of the recognition of remaining unsatisfied performance obligations is subject to change and is affected by changes to scope, changes in timing of delivery of products and services, or contract modifications.