Document and Entity Information - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Feb. 28, 2019	Jun. 30, 2018
Document And Entity Information
Entity Registrant Name	GlassBridge Enterprises, Inc.
Entity Central Index Key	0001014111
Document Type	10-K
Document Period End Date	Dec. 31, 2018
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity a Well-known Seasoned Issuer	No
Entity a Voluntary Filer	No
Entity's Reporting Status Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business flag	true
Entity Emerging Growth Company	false
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Public Float			$ 3,200
Entity Common Stock, Shares Outstanding		5,137,487
Trading Symbol	GLAE
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2018