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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%