Intangible Assets - Gross Carrying Amount (Details) - USD ($) $ in Thousands |
6 Months Ended | 12 Months Ended |
|---|---|---|
Jun. 30, 2026 |
Dec. 31, 2025 |
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| Intangible Assets | ||
| Gross Carrying Amount | $ 34,685 | $ 34,795 |
| Accumulated Amortization | (7,393) | (5,567) |
| Total | $ 27,292 | $ 29,228 |
| Acquired technology | ||
| Intangible Assets | ||
| Weighted Average Amortization Period | 11 years | 11 years |
| Gross Carrying Amount | $ 15,994 | $ 15,997 |
| Accumulated Amortization | (3,832) | (3,047) |
| Total | $ 12,162 | $ 12,950 |
| Dry stack electrolyzer technology | ||
| Intangible Assets | ||
| Weighted Average Amortization Period | 10 years | 10 years |
| Gross Carrying Amount | $ 11,352 | $ 11,352 |
| Accumulated Amortization | (2,680) | (1,913) |
| Total | $ 8,672 | $ 9,439 |
| Customer relationships, trade name, and other | ||
| Intangible Assets | ||
| Weighted Average Amortization Period | 14 years | 14 years |
| Gross Carrying Amount | $ 7,339 | $ 7,446 |
| Accumulated Amortization | (881) | (607) |
| Total | $ 6,458 | $ 6,839 |
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- Definition 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/2003/role/disclosureRef
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- Definition Weighted-average period of amortization for finite-lived intangible asset acquired in business combination, asset acquisition, and from joint venture formation, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of accumulated amortization of finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount, before accumulated amortization, of finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount, after accumulated amortization, of finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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