Summary of Significant Accounting Policies - Revenue Recognition (Details) - Fuel cells, infrastructure, and service to customers	12 Months Ended
	Dec. 31, 2025
Summary of Significant Accounting Policies
Payment terms	30 to 90 days
Extended maintenance contract period	five-to-ten-year service period

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.

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