Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Net revenue		$ 100
Cost of goods sold
Gross profit		100
Operating expenses:
Selling, general and administrative	800	1,700
GBAM Fund expenses		100
Restructuring and other	100
Total operating expenses	900	1,800
Operating loss from continuing operations	(900)	(1,700)
Other income (expense):
Interest expense		(100)
Net loss from GBAM Fund activities		(100)
Other income, net		200
Total other income (expense)
Loss from continuing operations before income taxes	(900)	(1,700)
Income tax benefit
Loss from continuing operations	(900)	(1,700)
Discontinued operations:
Income on sale of discontinued businesses, net of income taxes	10,200
Income from discontinued operations, net of income taxes	300
Income from discontinued operations, net of income taxes	10,500
Net income (loss)	$ 9,600	$ (1,700)
Loss per common share attributable to GlassBridge common shareholders - basic and diluted:
Continuing operations	$ (0.18)	$ (0.33)
Discontinued operations	2.06
Net income (loss)	$ 1.88	$ (0.33)
Weighted average common shares outstanding:
Basic and diluted	5,100,000	5,100,000