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Variable Interest Entities and Voting Interest Entities - Narrative (Details) $ in Thousands |  |  |  |  |  |  | 3 Months Ended | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 22, 2024 USD ($) | May 16, 2024 USD ($) | Jun. 02, 2023 USD ($) shares | May 09, 2023 USD ($) shares | Mar. 10, 2023 USD ($) shares | May 03, 2022 USD ($) | Sep. 30, 2024 USD ($) | Dec. 31, 2025 USD ($) | Aug. 01, 2025 | Jul. 22, 2025 MW phase | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Jan. 01, 2023 | Aug. 05, 2022 USD ($)
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Discount rate |  |  |  |  |  |  |  | 20.00% |  |  |  |  |  |
Investment initial investors period |  |  |  |  |  |  |  | 180 days |  |  |  |  |  |
Term Loan and capitalized interest (excludes debt issuance cost) |  |  |  |  |  |  |  | $ 26,757 |  |  | $ 21,505 |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  |  |  | $ 100,000 |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  |  |  |  |  |  |  | 92.50% |  |  |  |  |  |
Compute Co |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustments to additional paid in capital | $ 4,600 |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary ownership percentage | 49.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Investment occuring period | 30 days |  |  |  |  |  |  |  |  |  |  |  |  |
Investor Class B Membership Interests |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  |
Common Class B |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument percentage |  |  |  |  |  |  |  | 18.00% |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  |  |  |  |  |  |  | 16.00% |  |  |  |  |  |
Common Class A |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  |  |  |  |  |  |  | 7.50% |  |  |  |  |  |
Purchase and Sale Agreement | Parent Company |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued, new issues (in shares) | shares |  |  |  |  | 6,790,537 |  |  |  |  |  |  |  |  |
Equipment loan |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument percentage |  | 15.00% |  |  |  |  |  |  |  |  |  |  |  |
Additions |  | $ 1,000 |  |  |  |  |  |  |  |  |  |  |  |
Term Loan and capitalized interest (excludes debt issuance cost) |  | $ 720 |  |  |  |  |  |  |  |  |  |  |  |
Spring Lane | Purchase and Sale Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares sold |  |  |  |  | $ 7,500 |  |  |  |  |  |  |  |  |
Stock issued, new issues (in shares) | shares |  |  |  |  | 39,791,988 |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  | $ 5,800 |  |  |  |  |  |  |  |  |
Spring Lane |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest ownership percentage |  |  |  |  |  |  |  | 67.80% |  |  |  |  |  |
Spring Lane | Common Class A |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest ownership percentage |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  |
Spring Lane | Purchase and Sale Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest ownership percentage |  |  |  |  | 85.40% |  |  |  |  |  |  |  |  |
Soluna DVSL ComputeCo, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest ownership percentage |  |  |  |  |  |  |  | 32.20% |  |  |  |  |  |
Soluna DVSL ComputeCo, LLC | Common Class B |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument percentage |  |  |  |  |  |  |  | 92.50% |  |  |  |  |  |
Soluna DVSL ComputeCo, LLC | Common Class A |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument percentage |  |  |  |  |  |  |  | 7.50% |  |  |  |  |  |
Soluna DVSL ComputeCo, LLC | Class B Membership Interests |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument percentage |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  |
Soluna DV Devco, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest ownership percentage |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |
Parent | Purchase and Sale Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest ownership percentage |  |  |  |  | 14.60% |  |  |  |  |  |  |  |  |
Dorothy Phase 1A Facility | Purchase and Sale Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest ownership percentage |  |  |  |  |  |  |  |  |  |  |  | 67.80% |  |
DVSL ComputeCo, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest ownership percentage |  |  |  |  |  |  |  | 15.00% |  |  |  |  |  |
Debt instrument percentage |  |  |  |  |  |  |  |  |  |  |  | 67.80% | 14.60% |
DVSL HoldCo, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest ownership percentage |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  |
Debt instrument percentage |  |  |  |  |  |  |  | 100.00% |  |  |  | 100.00% |  |
Navitas |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest ownership percentage |  |  | 49.00% | 26.50% |  |  |  | 49.00% |  |  |  |  |  |
Strategic partnership and financing |  |  | $ 7,600 | $ 4,500 |  |  |  |  |  |  |  |  |  |
Membership interest, receipt (in shares) | shares |  |  | 7,597 | 4,500 |  |  |  |  |  |  |  |  |  |
Receipt of membership interest, net (in shares) | shares |  |  | 12,097 |  |  |  |  |  |  |  |  |  |  |
Soluna DV Compute Co LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest ownership percentage |  |  | 51.00% |  |  |  |  | 51.00% |  |  |  |  |  |
Strategic partnership and financing |  |  | $ 1,340 |  |  |  |  |  |  |  |  |  |  |
Membership interest, receipt (in shares) | shares |  |  | 1,340 |  |  |  |  |  |  |  |  |  |  |
Receipt of membership interest, net (in shares) | shares |  |  | 12,590 |  |  |  |  |  |  |  |  |  |  |
KKSL JVCo | Investor Class B Membership Interests |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument percentage |  |  |  |  |  |  |  | 20.00% |  |  |  |  |  |
Soluna Digital Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest ownership percentage |  |  |  |  |  |  |  | 0.00% |  |  |  |  |  |
Soluna Digital Inc | Investor Class B Membership Interests |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest ownership percentage |  |  |  |  |  |  |  | 0.00% |  |  |  |  |  |
Soluna Digital Inc | Class A Membership Interests |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest ownership percentage |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital contribution |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 26,300
Maximum | DVSL ComputeCo, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument percentage |  |  |  |  |  |  |  | 58.00% |  |  |  |  |  |
Minimum | Spring Lane | Purchase and Sale Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  | $ 7,500 |  |  |  |  |  |  |  |  |
Minimum | DVSL ComputeCo, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument percentage |  |  |  |  |  |  |  | 42.00% |  |  |  |  |  |
Spring Lane |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from other debt |  |  |  |  |  | $ 35,000 | $ 45,000 |  |  |  |  |  |  |
Capital contribution |  |  |  |  |  |  |  |  |  |  |  | $ 4,800 |  | 8,100
Spring Lane | Spring Lane |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest ownership percentage |  |  |  |  |  |  |  | 16.00% |  |  |  |  |  |
Spring Lane | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital contribution |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 12,500
DVSL II JVCo |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of mega watts | MW |  |  |  |  |  |  |  |  |  | 48 |  |  |  |
Soluna2 SLC Fund II Project Holdco LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustments to additional paid in capital | $ 29,980 |  |  |  |  |  |  |  |  |  |  |  |  |
Soluna2 SLC Fund II Project Holdco LLC | Investor Class B Membership Interests |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  |  |  | $ 2,160 |  |  |  |  |  |
Soluna Digital Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of mega watts | MW |  |  |  |  |  |  |  |  |  | 83 |  |  |  |
Soluna Digital Inc | Texas |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of mega watts | MW |  |  |  |  |  |  |  |  |  | 166 |  |  |  |
Number of phases | phase |  |  |  |  |  |  |  |  |  | 2 |  |  |  |
Soluna Digital Inc | KKSL JVCo | Investor Class B Membership Interests |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument percentage |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |
Spring Lane Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument percentage |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |
Spring Lane Capital | Soluna2 Kati Project Holdco LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustments to additional paid in capital |  |  |  |  |  |  |  | $ 48,980 |  |  |  |  |  |
Spring Lane Capital | Soluna2 Kati Project Holdco LLC | Investor Class B Membership Interests |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest ownership percentage |  |  |  |  |  |  |  | 49.00% |  |  |  |  |  |
Spring Lane Capital | Soluna2 Kati Project Holdco LLC | Class B Membership Interests |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument percentage |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |
Spring Lane Capital | Soluna2 Kati Project Holdco LLC | Class A Membership Units |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument percentage |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |

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