v3.25.2
Cover - shares
6 Months Ended
Jun. 30, 2025
Aug. 08, 2025
Document Type 10-Q  
Amendment Flag false  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Jun. 30, 2025  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2025  
Current Fiscal Year End Date --12-31  
Entity File Number 001-40261  
Entity Registrant Name Soluna Holdings, Inc.  
Entity Central Index Key 0000064463  
Entity Tax Identification Number 14-1462255  
Entity Incorporation, State or Country Code NV  
Entity Address, Address Line One 325 Washington Avenue Extension  
Entity Address, City or Town Albany  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 12205  
City Area Code (516)  
Local Phone Number 216-9257  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   30,145,958
Common Stock, par value $0.001 per share    
Title of 12(b) Security Common Stock, par value $0.001 per share  
Trading Symbol SLNH  
Security Exchange Name NASDAQ  
9.0% Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share    
Title of 12(b) Security 9.0% Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share  
Trading Symbol SLNHP