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Accounting Policies - Narrative (Details) |  |  |  |  |  | 12 Months Ended |  |  |  |  |  |
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Dec. 04, 2025 $ / shares shares | Jul. 17, 2025 USD ($) | Jul. 15, 2025 USD ($) shares | Oct. 01, 2024 USD ($) $ / shares shares | Jul. 12, 2024 USD ($) | Dec. 31, 2025 USD ($) segment $ / shares shares | Dec. 31, 2024 USD ($) shares | Nov. 07, 2025 shares | Sep. 28, 2025 shares | Jun. 20, 2024 USD ($) | Feb. 28, 2024 $ / shares shares | Dec. 31, 2023 USD ($) | Dec. 31, 2022 shares
Common stock, shares authorized (in shares) | shares |  |  |  |  |  | 375,000,000 | 375,000,000 |  |  |  |  |  |
Placement agent warrants | shares |  |  |  |  |  | 30,599,040 |  |  |  |  | 850,000 |  |
Proceeds from common stock warrant exercises |  |  |  |  |  | $ 10,272,000 | $ 2,332,000 |  |  |  |  |  |
Fair value on placement agent warrant financing cost |  |  |  |  |  | $ 0 | 0 |  |  |  |  |  |
Class of warrant or right, exercise price of warrants or rights (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 0.01 |  |
Class of warrant or right exercise period |  |  |  |  | 3 years |  |  |  |  |  |  |  |
Share price (in dollars per share) | $ / shares |  |  |  |  |  | $ 1.17 |  |  |  |  |  |  |
Deemed dividend |  |  |  | $ 1,700,000 |  |  |  |  |  |  |  |  |
Customer deposits-current |  |  |  |  |  | $ 19,348,000 | 20,015,000 |  |  |  |  |  |
Customer deposits- long-term |  |  |  |  |  | 2,533,000 | 0 |  |  |  |  |  |
Provision for credit losses |  |  |  |  |  | 0 | 760,000 |  |  |  |  |  |
Accounts receivable, allowance for credit loss |  |  |  |  |  | 244,000 | 244,000 |  |  |  |  | $ 0 |
Other receivables |  |  |  |  |  | 15,000 | 178,000 |  |  |  |  |  |
Deposits and credits on equipment |  |  |  |  |  | 1,377,000 | 5,145,000 |  |  |  |  |  |
Deposits |  |  |  |  |  |  | 975,000 |  |  |  |  |  |
Credit on equipment usage value |  |  |  |  |  |  | 195,000 |  |  |  |  |  |
Credit on equipment future purchases |  |  |  |  |  | 780,000 |  |  |  |  |  |  |
Loss on credit deposit |  |  |  |  |  | 780,000 |  |  |  |  |  |  |
Impairment on fixed assets |  |  |  |  |  | 12,000 | 130,000 |  |  |  |  |  |
Restricted cash |  |  |  |  |  | 12,400,000 | 2,600,000 |  |  |  |  |  |
Restricted cash |  |  |  |  |  | 4,500,000 | 1,150,000 |  |  |  |  |  |
Restricted cash, noncurrent |  |  |  |  |  | 7,920,000 | 1,460,000 |  |  |  |  |  |
Derivative liability |  |  |  |  |  | $ 0 |  |  |  |  |  |  |
Number of reportable segments | segment |  |  |  |  |  | 3 |  |  |  |  |  |  |
Number of operating segments | segment |  |  |  |  |  | 3 |  |  |  |  |  |  |
Cash |  |  |  |  |  | $ 88,100,000 |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Tax |  |  |  |  |  | 0 | 0 |  |  |  |  |  |
Fair value on placement agent warrant financing cost |  |  |  |  |  | $ 146,000 | 0 |  |  |  |  |  |
Cryptocurrency data hosting |  |  |  |  |  |  |  |  |  |  |  |  |
Term of contract |  |  |  |  |  | 2 years |  |  |  |  |  |  |
Contract with customer, liability |  |  |  |  |  | $ 1,000,000.0 |  |  |  |  |  |  |
Customer deposits-current |  |  |  |  |  | 518,000 |  |  |  |  |  |  |
Customer deposits- long-term |  |  |  |  |  | 495,000 |  |  |  |  |  |  |
Accredited investor | Promissory Note Agreement |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible note |  |  |  |  |  |  |  |  |  | $ 12,500,000 |  |  |
New accredited investors | Secured Promissory Notes |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible note |  |  |  |  | $ 1,250,000 |  |  |  |  |  |  |  |
Property, plant and equipment |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment on fixed assets |  |  |  |  |  | 12,000 | 130,000 |  |  |  |  |  |
Prepaid expenses and other current assets |  |  |  |  |  |  |  |  |  |  |  |  |
Other receivables |  |  |  |  |  | 15,000 | 82,000 |  |  |  |  |  |
Other noncurrent assets |  |  |  |  |  |  |  |  |  |  |  |  |
Other receivables |  |  |  |  |  | 0 | $ 96,000 |  |  |  |  |  |
Warrants |  |  |  |  |  |  |  |  |  |  |  |  |
Placement agent warrants | shares |  |  |  | 140,000 |  |  |  |  |  |  |  |  |
Stock issued, new issues (in shares) | shares |  |  |  | 60,000 |  |  |  |  |  |  |  |  |
July 2025 Offering |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, number of shares issued in transaction (in shares) | shares |  |  | 8,794,544 |  |  |  |  |  |  |  |  |  |
Series B preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, convertible, conversion price (in dollars per share) | $ / shares |  |  |  | $ 5 |  |  |  |  |  |  |  |  |
Share price (in dollars per share) | $ / shares |  |  |  | $ 135.25 |  |  |  |  |  |  |  |  |
Series B preferred stock | Warrants |  |  |  |  |  |  |  |  |  |  |  |  |
Class of warrant or right, number of securities called by warrants or rights (in shares) | shares |  |  |  | 140,000 |  |  |  |  |  |  |  |  | 60,000
Series B preferred stock | Additional warrants |  |  |  |  |  |  |  |  |  |  |  |  |
Class of warrant or right, number of securities called by warrants or rights (in shares) | shares |  |  |  | 140,000 |  |  |  |  |  |  |  |  |
Generate common warrant |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares authorized (in shares) | shares |  |  |  |  |  |  |  | 375,000,000 |  |  |  |  |
Placement agent warrants | shares |  |  |  |  |  |  |  |  | 2,000,000.0 |  |  |  |
Generate common warrant |  |  |  |  |  | (3,800,000) |  |  |  |  |  |  |
Pre funded warrants | December 2025 Purchase Agreement |  |  |  |  |  |  |  |  |  |  |  |  |
Class of warrant or right, number of securities called by warrants or rights (in shares) | shares | 12,149,200 |  |  |  |  |  |  |  |  |  |  |  |
Pre funded warrants | July 2025 Offering |  |  |  |  |  |  |  |  |  |  |  |  |
Class of warrant or right, number of securities called by warrants or rights (in shares) | shares |  |  | 296,365 |  |  |  |  |  |  |  |  |  |
Series A warrants | July 2025 Offering |  |  |  |  |  |  |  |  |  |  |  |  |
Class of warrant or right, number of securities called by warrants or rights (in shares) | shares |  |  | 9,090,909 |  |  |  |  |  |  |  |  |  |
Warrants and rights outstanding |  |  | $ 8,600,000 |  |  |  |  |  |  |  |  |  |
Proceeds from common stock warrant exercises |  |  |  |  |  | 10,000,000.0 |  |  |  |  |  |  |
Series B warrants | July 2025 Offering |  |  |  |  |  |  |  |  |  |  |  |  |
Class of warrant or right, number of securities called by warrants or rights (in shares) | shares |  |  | 9,090,909 |  |  |  |  |  |  |  |  |  |
Proceeds from common stock warrant exercises |  |  |  |  |  | $ 10,000,000.0 |  |  |  |  |  |  |
Warrants | July 2025 Offering |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value on placement agent warrant financing cost |  | $ 12,800,000 |  |  |  |  |  |  |  |  |  |  |
Common Stock | December 2025 Purchase Agreement |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued, new issues (in shares) | shares | 5,929,944 |  |  |  |  |  |  |  |  |  |  |  |
Shares issued, price per share (in dollars per share) | $ / shares | $ 1.77 |  |  |  |  |  |  |  |  |  |  |  |
Series C warrants | December 2025 Purchase Agreement |  |  |  |  |  |  |  |  |  |  |  |  |
Class of warrant or right, number of securities called by warrants or rights (in shares) | shares | 18,079,144 |  |  |  |  |  |  |  |  |  |  |  |
Class of warrant or right, exercise price of warrants or rights (in dollars per share) | $ / shares | $ 1.65 |  |  |  |  |  |  |  |  |  |  |  |
Class of warrant or right exercise period | 5 years |  |  |  |  |  |  |  |  |  |  |  |
Placement agent warrants | December 2025 Purchase Agreement |  |  |  |  |  |  |  |  |  |  |  |  |
Class of warrant or right, number of securities called by warrants or rights (in shares) | shares | 903,957 |  |  |  |  |  |  |  |  |  |  |  |
Harmattan Energy Limited |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest ownership percentage |  |  |  |  |  | 1.79% | 1.79% |  |  |  |  |  |
Equity method investments |  |  |  |  |  | $ 0 | $ 0 |  |  |  |  |  |
MEOH Power, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest ownership percentage |  |  |  |  |  | 47.50% |  |  |  |  |  |  |
Equity method investments |  |  |  |  |  | $ 0 | $ 0 |  |  |  |  |  |
Investment owned, balance, shares | shares |  |  |  |  |  | 75,049,937 |  |  |  |  |  |  |
Common stock, shares authorized (in shares) | shares |  |  |  |  |  | 240,000,000 |  |  |  |  |  |  |
Minimum | Restricted stock |  |  |  |  |  |  |  |  |  |  |  |  |
Service period |  |  |  |  |  | 1 year |  |  |  |  |  |  |
Maximum | Restricted stock |  |  |  |  |  |  |  |  |  |  |  |  |
Service period |  |  |  |  |  | 3 years |  |  |  |  |  |  |
Strategic pipeline contract |  |  |  |  |  |  |  |  |  |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life |  |  |  |  |  | 5 years |  |  |  |  |  |  |
Assembled workforce |  |  |  |  |  |  |  |  |  |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life |  |  |  |  |  | 5 years |  |  |  |  |  |  |
Patents | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life |  |  |  |  |  | 15 years |  |  |  |  |  |  |
Patents | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life |  |  |  |  |  | 25 years |  |  |  |  |  |  |

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