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Related Party Transactions (Details Narrative) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Oct. 29, 2021
Mar. 23, 2020
Jan. 13, 2020
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Related Party Transaction [Line Items]            
Company paid $ 725,000         $ 245
Professional fees       $ 1 $ 8  
Cost of investments       $ 237    
Investment percentage       20.00%    
Aggregate purchase price       $ 500    
Chief Executive Officer [Member] | Michael Toporek [Member]            
Related Party Transaction [Line Items]            
Description of director owns       (i) 90% of the equity of Soluna Technologies Investment I, LLC, which owns 57.9% of HEL and (ii) 100% of the equity of MJT Park Investors, Inc., which owns 3.1% of HEL, in each case on a fully-diluted basis. Mr. Toporek does not own directly, or indirectly, any equity interest in Tera Joule, LLC, which owns 9.2% of HEL; however, as a result of his 100% ownership of Brookstone IAC, Inc., which is the manager of Tera Joule, LLC, he has dispositive power over the equity interests that Tera Joule owns in HEL.    
Chief Executive Officer [Member] | Matthew E Lipman [Member]            
Related Party Transaction [Line Items]            
Description of director owns       which owns 9.2% of HEL; however, as a result of his position as a director and officer of Brookstone IAC, Inc., which is the manager of Tera Joule, LLC, he has dispositive power over the equity interests that Tera Joule owns in HEL. As a result, the approximate dollar value of the amount of Mr. Toporek’s and Mr. Lipman’s interest in the Company’s transactions with HEL for the three months ended March 31, 2022 was $0 and $0.    
Chief Executive Officer [Member] | Mr Belizaire [Member]            
Related Party Transaction [Line Items]            
Description of director owns       owner of 1,317,567 shares of common stock of HEL and 102,380 Class Seed Preferred shares, which are convertible into 86,763 shares of common stock of HEL. These interests give Mr. Belizaire an ownership of 10.54% in HEL. Mr. Belizaire also owns an interest in HEL indirectly through his 5.0139% interest of Tera Joule, LLC’s 965,945 Class Seed Preferred shares, which are convertible into 818,596 shares of common stock of HEL. Mr. Bottomley is the beneficial owner of 96,189, or approximately 0.72%, of the outstanding shares of common stock of HEL.    
Harmattan Energy Ltd [Member]            
Related Party Transaction [Line Items]            
Cost of investments       $ 50    
Soluna [Member]            
Related Party Transaction [Line Items]            
Company paid       65,000 350,000  
Acquire additional assets       112    
Description of agreement     Technologies Investment I, LLC, a Delaware limited liability company that owns, on a fully diluted basis, 57.9%      
Soluna [Member] | Class A Preferred Shares [Member]            
Related Party Transaction [Line Items]            
Cost of investments   $ 250        
Investment shares purchased     158,730,000      
Soluna [Member] | M E O H Power Inc [Member]            
Related Party Transaction [Line Items]            
Company paid       380    
Soluna [Member] | Operating And Management Agreement 3 [Member]            
Related Party Transaction [Line Items]            
Company paid       544   $ 221
Me O H Power [Member]            
Related Party Transaction [Line Items]            
Promissory Note available to convert       332 $ 329  
H E L [Member]            
Related Party Transaction [Line Items]            
Cost of investments       $ 750    
Investment percentage       1.79%