Income Taxes (Details Narrative) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Feb. 28, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jun. 15, 2021
Minimum tax credit refundable				$ 2,200
Net cash paid for income taxes		$ 0	$ 0
Valuation allowance		231,900	$ 236,400
Deferred tax liability valuation allowance		200
Operating loss carryforwards		$ 594,000
Income tax expiry description		2029
Income tax examination likelihood ownership percentage		This limitation could result if there is a more than 50 percent ownership shift in the GlassBridge shares within a three-year testing period
State and Local Jurisdiction [Member] | Tax Year 2037 [Member]
Operating loss carryforwards		$ 156,000
State and Local Jurisdiction [Member] | After 2021 [Member]
Operating loss carryforwards		42,000
U.S. and Foreign Tax [Member] | Expire Between 2021 and 2023 [Member]
Operating loss carryforwards		20,300
U.S. and Foreign Tax [Member] | Expire Between 2024 and 2033 [Member]
Operating loss carryforwards		16,600
Federal Capital [Member] | Expire Between 2020 and 2024 [Member]
Operating loss carryforwards		$ 132,300
Internal Revenue Service (IRS) [Member]
Income tax expiry description		The Company's $584.0 million in federal net operating loss carryforwards generated through 2017 continue to be subject to the historical tax rules that allow carryforward for 20 years from origin, with the ability to offset 100 percent of future taxable income. Any subsequent tax losses have an indefinite life.
Equity ownership		100.00%
U.S. and Foreign Tax [Member]
Remainder tax credit carryforward expiration		Expire between 2021 and 2023, and the remainder of which will expire between 2024 and 2033.
Subsequent Event [Member]
Income tax refunds	$ 600
Subsequent Event [Member] | ESW Capital LLC [Member]
Operating loss carryforwards					$ 158,800