Related Party Transactions	12 Months Ended
Dec. 31, 2017
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions On August 17, 2015, the Board appointed Mr. Kasoff to serve as Interim President of the Company effective August 19, 2015. Effective October 14, 2015, in connection with the appointment of Mr. Fernander to the position of Interim Chief Executive Officer, the Board appointed Mr. Kasoff as Chief Restructuring Officer at the same level of compensation he received as Interim President. Effective November 25, 2015, the Board of Directors appointed Mr. Kasoff to also serve as the Company's Interim Chief Financial Officer until April 26, 2016 when the Company appointed Mr. Zheng as the Chief Financial Officer. Effective September 8, 2016 Mr. Kasoff resigned as the Chief Restructuring Officer of the Company and on February 2, 2017 he also resigned from the Board of Directors. Mr. Kasoff also serves as president of Realization Services, Inc. (“RSI”), a management consulting firm specializing in assisting companies and capital stakeholders in troubled business environments. Pursuant to a consulting agreement between the Company and RSI dated August 17, 2015 and subsequent amendments, RSI had performed consulting services for the Company for the period from August 8, 2015 up to March 30, 2016, including assisting the Company with a review and assessment of the Company’s business and the formulation of a business plan to enhance shareholder value going forward. On July 15, 2016, the Company entered into a consulting agreement with RSI to perform consulting services from July 18, 2016 through August 14, 2016 with an option for a three week extended term. Under the consulting agreement, RSI could receive consulting fees of up to $125,000 per week during the initial term. Consulting fees for the extended term, if elected by the Company, could not exceed $500,000. RSI received consulting fees of $2.4 million for the year ended December 31, 2016. The fees are recorded in restructuring and other charges. In connection with the CMC settlement, RSI received consulting fees of $0.6 million for the year ended December 31, 2017. These fees are recorded in restructuring and other charges. See Note 15 - Litigation, Commitments and Contingencies for additional information. On October 14, 2015, the Company acquired substantially all of the equity of CDI for approximately $6.7 million in cash, shares of the Company's common stock and repayment of debt. Geoff Barrall is the founder and, at the time of acquisition, was also the Chief Executive Officer of CDI. Mr. Barrall was a member of the GlassBridge Board at the time of the acquisition. In consideration for his CDI common shares and options to purchase CDI common shares, Mr. Barrall received approximately $184,000 at the time of the acquisition and he will be eligible to receive up to an additional $260,000 to the extent certain CDI revenue targets are achieved for the 3 consecutive six-month periods commencing January 1, 2016. As of December 31, 2017, none of the revenue targets were met and no such additional payments had been made to Mr. Barrall. In January 2016, the Board approved investing up to 25% of the Company’s cash in investment funds with the focus on producing attractive risk-adjusted rates of return while maintaining liquidity. On February 8, 2016, the Company entered into a subscription agreement to invest up to $20 million of its excess cash from various Company subsidiaries in Clinton Lighthouse. Clinton Lighthouse is a market neutral fund which provides daily liquidity to its investors. Clinton Lighthouse is managed by Clinton. Pursuant to the arrangement, Clinton agreed to waive its customary management fee and agreed to the receipt of any consideration pursuant to incentive compensation in the form of the Company’s common stock at a value of $10.00 per share (as adjusted to reflect the Reverse Stock Split). The closing price of the Company’s common stock on February 8, 2016 was $6.50 (as adjusted to reflect the Reverse Stock Split). The Board, in conjunction with management, reviewed various funds and voted to approve this investment, with Mr. De Perio abstaining from the vote and recusing himself from all related discussions and deliberations. Mr. De Perio is the Chairman of the Board and a Senior Portfolio Manager at Clinton. On March 17, 2016, the Board approved the elimination of the 25% limitation on the amount of the Company’s excess cash that may be invested, such that the Company may invest up to $35 million of its excess cash in Clinton Lighthouse. On April 29, 2016, the Company and Clinton entered into an amended and restated letter agreement in order to adjust the price at which the Company’s stock would be valued for purposes of paying the incentive fee thereunder from $10.00 to $18.00 (as adjusted to reflect Reverse Stock Split) beginning May 1, 2016, subject to adjustment based on the volume weighted average price of the Company’s common stock. As of December 31, 2016, the Company paid Clinton $0.5 million associated with the performance fees earned in 2016. On January 31, 2017, the Company held a special meeting of the stockholders of the Company at which the stockholders approved the issuance of up to 1,500,000 shares (the “Capacity Shares”) of the Company’s common stock (as adjusted to reflect the Reverse Stock Split), par value $0.01 per share (“Common Stock”), pursuant to the Subscription Agreement, dated as of November 22, 2016, by and between the Company and Clinton, as amended by Amendment No. 1 to the Subscription Agreement, dated as of January 9, 2017 (as so amended, the “Subscription Agreement”). Pursuant to the terms of the Subscription Agreement, on February 2, 2017 (the “Initial Closing Date”), the Company entered into the Capacity and Services Transaction with Clinton Group and GBAM. As consideration for the capacity and services Clinton has agreed to provide under the Capacity and Services Transaction and pursuant to the terms of the Subscription Agreement, the Company issued 1,250,000 shares of the Company’s common stock (as adjusted to reflect the Reverse Stock Split) to Madison Avenue Capital Holdings, Inc. (“Madison”), an affiliate of Clinton, on the Initial Closing Date. The closing price of the Company’s common stock on the Initial Closing Date was $8.10. The Company also entered into a Registration Rights Agreement with Madison on the Initial Closing Date, relating to the registration of the resale of the Capacity Shares as well as a letter agreement with Madison pursuant to which Madison has agreed to a three-year lockup with respect to any Capacity Shares issued to it. As of December 31, 2017, the short term investment balance in Clinton Lighthouse was $0.4 million compared to $19.5 million as of December 31, 2016. The decrease of $19.1 million mainly relates to $18.7 million of redemptions and approximately $0.4 million of losses for the year ended December 31, 2017. We recorded losses of approximately $4.5 million for the year ended December 31, 2016 related to Clinton Lighthouse, which includes $0.5 million of performance fees. Income or loss including unrealized gains and losses is recorded as a component of "Other income (expense), net" in our Consolidated Statements of Operations. Pursuant to the Capacity and Services Agreement, the Company will no longer incur management or performance fees related to our investment in Clinton Lighthouse. Mr. Strauss serves as our Chief Operating Officer pursuant to the terms of a Services Agreement we entered into with Clinton on March 2, 2017 (the “Services Agreement”). The Services Agreement provides that Clinton will make available one of its employees to serve as Chief Operating Officer of the Company, and any subsidiary of the Company we may designate from time to time, as well as provide to GBAM, our investment adviser subsidiary, certain additional services. Pursuant to the terms of the Services Agreement, we may request that Clinton designate a mutually agreeable replacement employee to serve as Chief Operating Officer or terminate Clinton’s provision of an employee to us for such role. Under the Services Agreement, we have agreed to pay Clinton $125,000 for an initial term concluding on May 31, 2017, which term will automatically renew unless terminated for successive three-month terms at a rate of $125,000 per renewal term. If the Services Agreement is terminated prior to the conclusion of a term, we will be reimbursed for the portion of the prepaid fee attributable to the unused portion of such term. Clinton will continue to pay Mr. Strauss’s compensation and benefits and we have agreed to pay or reimburse Mr. Strauss for his reasonable expenses. Pursuant to the terms of the Services Agreement, we have also agreed to indemnify Mr. Strauss, Clinton, any substitute Chief Operating Officer and certain of their affiliates for certain losses. As of December 31, 2017, the Company paid Clinton $500,000 under this Services Agreement, of which $416,668 is recorded within “Selling, general and administrative” in our Consolidated Statements of Operations.

Related Party Transactions

On August 17, 2015, the Board appointed Mr. Kasoff to serve as Interim President of the Company effective August 19, 2015. Effective October 14, 2015, in connection with the appointment of Mr. Fernander to the position of Interim Chief Executive Officer, the Board appointed Mr. Kasoff as Chief Restructuring Officer at the same level of compensation he received as Interim President. Effective November 25, 2015, the Board of Directors appointed Mr. Kasoff to also serve as the Company's Interim Chief Financial Officer until April 26, 2016 when the Company appointed Mr. Zheng as the Chief Financial Officer. Effective September 8, 2016 Mr. Kasoff resigned as the Chief Restructuring Officer of the Company and on February 2, 2017 he also resigned from the Board of Directors.

Mr. Kasoff also serves as president of Realization Services, Inc. (“RSI”), a management consulting firm specializing in assisting companies and capital stakeholders in troubled business environments. Pursuant to a consulting agreement between the Company and RSI dated August 17, 2015 and subsequent amendments, RSI had performed consulting services for the Company for the period from August 8, 2015 up to March 30, 2016, including assisting the Company with a review and assessment of the Company’s business and the formulation of a business plan to enhance shareholder value going forward. On July 15, 2016, the Company entered into a consulting agreement with RSI to perform consulting services from July 18, 2016 through August 14, 2016 with an option for a three week extended term. Under the consulting agreement, RSI could receive consulting fees of up to $125,000 per week during the initial term. Consulting fees for the extended term, if elected by the Company, could not exceed $500,000. RSI received consulting fees of $2.4 million for the year ended December 31, 2016. The fees are recorded in restructuring and other charges.

In connection with the CMC settlement, RSI received consulting fees of $0.6 million for the year ended December 31, 2017. These fees are recorded in restructuring and other charges. See Note 15 - Litigation, Commitments and Contingencies for additional information.

On October 14, 2015, the Company acquired substantially all of the equity of CDI for approximately $6.7 million in cash, shares of the Company's common stock and repayment of debt. Geoff Barrall is the founder and, at the time of acquisition, was also the Chief Executive Officer of CDI. Mr. Barrall was a member of the GlassBridge Board at the time of the acquisition. In consideration for his CDI common shares and options to purchase CDI common shares, Mr. Barrall received approximately $184,000 at the time of the acquisition and he will be eligible to receive up to an additional $260,000 to the extent certain CDI revenue targets are achieved for the 3 consecutive six-month periods commencing January 1, 2016. As of December 31, 2017, none of the revenue targets were met and no such additional payments had been made to Mr. Barrall.

In January 2016, the Board approved investing up to 25% of the Company’s cash in investment funds with the focus on producing attractive risk-adjusted rates of return while maintaining liquidity. On February 8, 2016, the Company entered into a subscription agreement to invest up to $20 million of its excess cash from various Company subsidiaries in Clinton Lighthouse. Clinton Lighthouse is a market neutral fund which provides daily liquidity to its investors. Clinton Lighthouse is managed by Clinton. Pursuant to the arrangement, Clinton agreed to waive its customary management fee and agreed to the receipt of any consideration pursuant to incentive compensation in the form of the Company’s common stock at a value of $10.00 per share (as adjusted to reflect the Reverse Stock Split). The closing price of the Company’s common stock on February 8, 2016 was $6.50 (as adjusted to reflect the Reverse Stock Split). The Board, in conjunction with management, reviewed various funds and voted to approve this investment, with Mr. De Perio abstaining from the vote and recusing himself from all related discussions and deliberations. Mr. De Perio is the Chairman of the Board and a Senior Portfolio Manager at Clinton. On March 17, 2016, the Board approved the elimination of the 25% limitation on the amount of the Company’s excess cash that may be invested, such that the Company may invest up to $35 million of its excess cash in Clinton Lighthouse. On April 29, 2016, the Company and Clinton entered into an amended and restated letter agreement in order to adjust the price at which the Company’s stock would be valued for purposes of paying the incentive fee thereunder from $10.00 to $18.00 (as adjusted to reflect Reverse Stock Split) beginning May 1, 2016, subject to adjustment based on the volume weighted average price of the Company’s common stock. As of December 31, 2016, the Company paid Clinton $0.5 million associated with the performance fees earned in 2016.

On January 31, 2017, the Company held a special meeting of the stockholders of the Company at which the stockholders approved the issuance of up to 1,500,000 shares (the “Capacity Shares”) of the Company’s common stock (as adjusted to reflect the Reverse Stock Split), par value $0.01 per share (“Common Stock”), pursuant to the Subscription Agreement, dated as of November 22, 2016, by and between the Company and Clinton, as amended by Amendment No. 1 to the Subscription Agreement, dated as of January 9, 2017 (as so amended, the “Subscription Agreement”). Pursuant to the terms of the Subscription Agreement, on February 2, 2017 (the “Initial Closing Date”), the Company entered into the Capacity and Services Transaction with Clinton Group and GBAM. As consideration for the capacity and services Clinton has agreed to provide under the Capacity and Services Transaction and pursuant to the terms of the Subscription Agreement, the Company issued 1,250,000 shares of the Company’s common stock (as adjusted to reflect the Reverse Stock Split) to Madison Avenue Capital Holdings, Inc. (“Madison”), an affiliate of Clinton, on the Initial Closing Date. The closing price of the Company’s common stock on the Initial Closing Date was $8.10. The Company also entered into a Registration Rights Agreement with Madison on the Initial Closing Date, relating to the registration of the resale of the Capacity Shares as well as a letter agreement with Madison pursuant to which Madison has agreed to a three-year lockup with respect to any Capacity Shares issued to it.

As of December 31, 2017, the short term investment balance in Clinton Lighthouse was $0.4 million compared to $19.5 million as of December 31, 2016. The decrease of $19.1 million mainly relates to $18.7 million of redemptions and approximately $0.4 million of losses for the year ended December 31, 2017. We recorded losses of approximately $4.5 million for the year ended December 31, 2016 related to Clinton Lighthouse, which includes $0.5 million of performance fees. Income or loss including unrealized gains and losses is recorded as a component of "Other income (expense), net" in our Consolidated Statements of Operations. Pursuant to the Capacity and Services Agreement, the Company will no longer incur management or performance fees related to our investment in Clinton Lighthouse.

Mr. Strauss serves as our Chief Operating Officer pursuant to the terms of a Services Agreement we entered into with Clinton on March 2, 2017 (the “Services Agreement”). The Services Agreement provides that Clinton will make available one of its employees to serve as Chief Operating Officer of the Company, and any subsidiary of the Company we may designate from time to time, as well as provide to GBAM, our investment adviser subsidiary, certain additional services. Pursuant to the terms of the Services Agreement, we may request that Clinton designate a mutually agreeable replacement employee to serve as Chief Operating Officer or terminate Clinton’s provision of an employee to us for such role. Under the Services Agreement, we have agreed to pay Clinton $125,000 for an initial term concluding on May 31, 2017, which term will automatically renew unless terminated for successive three-month terms at a rate of $125,000 per renewal term. If the Services Agreement is terminated prior to the conclusion of a term, we will be reimbursed for the portion of the prepaid fee attributable to the unused portion of such term. Clinton will continue to pay Mr. Strauss’s compensation and benefits and we have agreed to pay or reimburse Mr. Strauss for his reasonable expenses. Pursuant to the terms of the Services Agreement, we have also agreed to indemnify Mr. Strauss, Clinton, any substitute Chief Operating Officer and certain of their affiliates for certain losses. As of December 31, 2017, the Company paid Clinton $500,000 under this Services Agreement, of which $416,668 is recorded within “Selling, general and administrative” in our Consolidated Statements of Operations.