Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Cash Flows from Operating Activities:
Net income (loss) attributable to GlassBridge	$ (600)	$ (1,300)	$ 9,000	$ (3,000)
Net loss attributable to noncontrolling interest				(300)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation and amortization				1,200
Stock-based compensation				(300)
Pension settlement and curtailments				200
Gain on sale of assets			(9,900)
Short term investment				700
Other, net			(200)	100
Changes in operating assets and liabilities			(3,000)	(3,200)
Net cash used in operating activities			(4,100)	(4,600)
Cash Flows from Investing Activities:
Investment in securities			(600)
Capital expenditures				(200)
Disbursement related to disposal group			(800)
Proceeds from sale of assets			1,200
Net cash used in investing activities			(200)	(200)
Cash Flows from Financing Activities:
Net cash provided by financing activities
Net change in cash and cash equivalents			(4,300)	(4,800)
Cash, cash equivalents and restricted cash - beginning of period			5,300	10,700
Cash, cash equivalents and restricted cash - end of period (a)	1,000	5,900	1,000	5,900
Supplemental disclosures of cash paid during the period:
Income taxes (net of refunds received)				200
Current assets:
Cash and cash equivalents	1,000	5,300	1,000	5,300
Restricted cash included in other current assets		200		200
Non-current assets:
Restricted cash included in non-current assets of discontinued operations		400		400
Total cash, cash equivalents and restricted cash	$ 1,000	$ 5,900	$ 1,000	$ 5,900