Basis of Presentation	9 Months Ended
Sep. 30, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation	1. Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management of Iconix Brand Group, Inc. (the “Company,” “we,” “us,” or “our”), all adjustments (consisting primarily of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the three months ended September 30, 2018 (“Current Quarter”) and the nine months ended September 30, 2018 (“Current Nine Months”) are not necessarily indicative of the results that may be expected for a full fiscal year. The interim condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017. During the Current Nine Months, the Company adopted seven new accounting pronouncements. Refer to Note 20 for further details. Certain reclassifications, which were immaterial, have been made to conform prior year data to the current presentation. Assessment of Going Concern These consolidated financial statements are prepared on a going concern basis that contemplates the realization of assets and discharge of liabilities in the normal course of business. Due to certain developments during the year ended December 31, 2017, including the decision by Target Corporation not to renew the existing Mossimo license agreement following its expiration in October 2018 and by Walmart, Inc. not to renew the existing Danskin Now license agreement following its expiration in January 2019, and the Company’s revised projected future earnings, the Company had initially forecasted that it would unlikely be in compliance with certain of its financial debt covenants in 2018 and beyond and that it may otherwise face possible liquidity challenges in 2018 and beyond. As a result, the Company amended its Senior Secured Term Loan to provide relief under certain covenants and implemented a cost savings plan to improve liquidity. Additionally, the Company considered Sears Holdings Corporation’s bankruptcy filing on October 15, 2018 and determined that the bankruptcy filing does not currently expect it to have a material impact on the Company’s ability to continue as a going concern. Refer to Note 4 and 22 for further details. While conditions and events do exist that may raise substantial doubt about the Company’s ability to continue as a going concern for the next twelve months, management believes as a result of implemented and planned cost savings, that its plans alleviate this substantial doubt, and therefore the management believes that it will continue as a going concern for the next twelve months. For additional information, please refer to Note 1 of Notes to Consolidated Financial Statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017.

1. Basis of Presentation

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management of Iconix Brand Group, Inc. (the “Company,” “we,” “us,” or “our”), all adjustments (consisting primarily of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the three months ended September 30, 2018 (“Current Quarter”) and the nine months ended September 30, 2018 (“Current Nine Months”) are not necessarily indicative of the results that may be expected for a full fiscal year. The interim condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017.

During the Current Nine Months, the Company adopted seven new accounting pronouncements. Refer to Note 20 for further details.

Certain reclassifications, which were immaterial, have been made to conform prior year data to the current presentation.

Assessment of Going Concern

These consolidated financial statements are prepared on a going concern basis that contemplates the realization of assets and discharge of liabilities in the normal course of business. Due to certain developments during the year ended December 31, 2017, including the decision by Target Corporation not to renew the existing Mossimo license agreement following its expiration in October 2018 and by Walmart, Inc. not to renew the existing Danskin Now license agreement following its expiration in January 2019, and the Company’s revised projected future earnings, the Company had initially forecasted that it would unlikely be in compliance with certain of its financial debt covenants in 2018 and beyond and that it may otherwise face possible liquidity challenges in 2018 and beyond. As a result, the Company amended its Senior Secured Term Loan to provide relief under certain covenants and implemented a cost savings plan to improve liquidity.

Additionally, the Company considered Sears Holdings Corporation’s bankruptcy filing on October 15, 2018 and determined that the bankruptcy filing does not currently expect it to have a material impact on the Company’s ability to continue as a going concern. Refer to Note 4 and 22 for further details.

While conditions and events do exist that may raise substantial doubt about the Company’s ability to continue as a going concern for the next twelve months, management believes as a result of implemented and planned cost savings, that its plans alleviate this substantial doubt, and therefore the management believes that it will continue as a going concern for the next twelve months.

For additional information, please refer to Note 1 of Notes to Consolidated Financial Statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017.