Cover - USD ($)	12 Months Ended
	Dec. 31, 2021	Aug. 28, 2022	Jun. 30, 2021
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2021
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2021
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	518
Local Phone Number	218-2550
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
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 Public Float			$ 62,830,478
Entity Common Stock, Shares Outstanding		13,949,706
Auditor Name	UHY LLP (1195)
Auditor Firm ID	1195
Auditor Location	Albany, New York
Common Stock Par Value 0. 001 Per Share [Member]
Title of 12(b) Security	Common Stock, par value $0.001 per share
Trading Symbol	SLNH
Security Exchange Name	NASDAQ
Sec 9. 0 Series Cumulative Perpetual Preferred Stock Par Value 0. 001 Per Share [Member]
Title of 12(b) Security	9.0% Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share
Trading Symbol	SLNHP
Security Exchange Name	NASDAQ