v3.25.2
Cover
Jul. 24, 2025
Cover [Abstract]  
Amendment Flag false
Entity Central Index Key 0000707388
Document Information [Line Items]  
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Entity Address, Postal Zip Code 06870
Entity Address, Address Line One 53 Forest Ave
Entity Address, City or Town Old Greenwich
Entity Address, State or Province CT
City Area Code 203
Local Phone Number 489-9500
Entity Registrant Name Star Equity Holdings, Inc.
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 33-0145723
Document Period End Date Jul. 24, 2025
Document Type 8-K
Entity Address, Address Line Two Suite 101
Entity File Number 001-35947
Common Stock  
Document Information [Line Items]  
Title of 12(b) Security Common Stock, par value $0.0001 per share
Trading Symbol STRR
Security Exchange Name NASDAQ
Series A  
Document Information [Line Items]  
Title of 12(b) Security Series A Cumulative Perpetual Preferred Stock, par value $0.0001 per share
Trading Symbol STRRP
Security Exchange Name NASDAQ
Series C Preferred Stock  
Document Information [Line Items]  
Title of 12(b) Security Series C Participating Preferred Stock, par value$0.0001 per share Purchase Rights