v3.26.1
Variable Interest Entities - Narrative (Details)
$ in Thousands
6 Months Ended
Jun. 03, 2026
USD ($)
MW
Apr. 15, 2026
USD ($)
Jul. 22, 2024
USD ($)
May 16, 2024
USD ($)
Jun. 30, 2026
USD ($)
May 19, 2026
USD ($)
Dec. 31, 2025
USD ($)
Jul. 22, 2025
MW
phase
Apr. 04, 2025
Feb. 28, 2025
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          
Total         $ 33,119   $ 26,757      
Debt instrument, basis spread on variable rate         92.50%          
Other liabilities         $ 414   743      
Cash         $ 113,364   $ 76,423      
Equipment/Land loan                    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]                    
Interest rate                   15.00%
Property, plant and equipment       $ 1,000            
Total       720            
Membership Interest Purchase Agreement | Dorothy Project 1B Company                    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]                    
Voting interests acquired (as a percentage)   85.40%       100.00%        
Equity method investment ownership interest decrease payment to minority shareholders           $ 8,800        
Membership Interest Purchase Agreement | Dorothy Project 1A Company                    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]                    
Voting interests acquired (as a percentage)   100.00%                
Payments to acquire businesses   $ 16,500                
Additional consideration due   10,500                
Common Class B                    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]                    
Interest rate         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%          
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%          
DVSL HoldCo, LLC                    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]                    
Interest rate         100.00%          
Soluna DVSL ComputeCo, LLC | Common Class B                    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]                    
Interest rate         92.50%          
Soluna DVSL ComputeCo, LLC | Common Class A                    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]                    
Interest rate         7.50%          
Soluna DVSL ComputeCo, LLC | Class A Membership Interests                    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]                    
Interest rate         50.00%          
Soluna DVSL ComputeCo, LLC | Class B Membership Interests                    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]                    
Interest rate         50.00%          
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 | 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%       100.00%  
KKSL JVCo | Class B membership interests                    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]                    
Interest rate         13.00%          
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%          
Kati 2 JVCo                    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]                    
Funded capital contribution $ 6,700                  
Phase I property contributed at cost 1,100                  
Pre-formation development costs and fees 3,600                  
Cash 2,000                  
Additional acquisition value 19,100                  
Operating expenses 2,000                  
Future development-entity transaction $ 500                  
Kati 2 JVCo | Phase one                    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]                    
Number of mega watts | MW 100                  
Kati 2 JVCo | Phase two                    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]                    
Number of mega watts | MW 250                  
Dorothy 1A Project | Membership Interest Purchase Agreement | Dorothy Project 1A Company                    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]                    
Payments to acquire businesses   $ 6,000                
Dorothy 1B Project | Membership Interest Purchase Agreement | Dorothy Project 1B Company                    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]                    
Equity interest ownership percentage           51.00%        
Minimum | DVSL ComputeCo, LLC                    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]                    
Interest rate         42.00%          
Maximum | DVSL ComputeCo, LLC                    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]                    
Interest rate         58.00%          
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 period         30 days          
Compute Co | Membership Interest Purchase Agreement | Dorothy Project 1B Company                    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]                    
Subsidiary, ownership percentage           49.00%        
Spring Lane Capital | Kati 2 JVCo                    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]                    
Proceeds from contributed capital $ 100                  
Spring Lane Capital | Kati 2 JVCo | Class B Membership Interests                    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]                    
Subsidiary, ownership percentage 100.00%                  
Spring Lane Capital | Kati 2 JVCo | Class B membership interests                    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]                    
Internal rate of return (as a percent)         14.00%          
Distribution percentage, thereafter         50.00%          
Spring Lane Capital | Kati 2 JVCo | Class A Membership Units                    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]                    
Subsidiary, ownership percentage 100.00%                  
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 | 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    
Adjustments to additional paid in capital         $ 48,980          
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 | Class B Membership Interests                    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]                    
Interest rate         13.00%          
Soluna Digital Inc | KKSL JVCo | Class B membership interests                    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]                    
Interest rate         100.00%          
Equity interest ownership percentage         87.00%          
Soluna Digital Inc | KKSL JVCo | Class A Membership Units                    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]                    
Interest rate         100.00%          
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]                    
Interest rate         100.00%          
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]                    
Equity interest ownership percentage         49.00%          
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]                    
Interest rate         100.00%