Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Cash flows from operating activities:
Net loss from continuing operations	$ 21,711	$ (580,813)	$ (22,811)	$ (583,564)
Income from discontinued operations		(2,130)		49,312
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation of property and equipment			1,583	1,247
Amortization of trademarks and other intangibles		200	205	567
Amortization of deferred financing costs			2,361	2,299
Amortization of debt discount			7,574	13,225
Third party fees associated with the issuance of 5.75% Convertible Notes			4,958
Interest expense on 5.75% Convertible Notes paid in shares			3,067
Stock-based compensation (benefit) expense			(108)	3,825
Provision for doubtful accounts			9,864	5,386
Writeoff of contract assets			575
Earnings on equity investments in joint ventures			(2,212)	(2,475)
Distributions from equity investments			3,021	2,824
Non-cash gain on re-measurement of equity investment			(8,410)
Gain on deconsolidation of joint venture				(3,772)
Gain on sale of trademarks, net		(875)	(1,268)	(875)
Trademark impairment	4,386	521,653	77,721	521,653
Goodwill impairment		103,877	37,812	103,877
Mark to market adjustment on convertible note			(73,745)
Gain on debt to equity conversions			(1,056)
Loss (gain) on extinguishment of debt		1,539	(4,473)	20,939
Income on other equity investment			364
Deferred income tax benefit			(4,905)	(31,721)
Foreign currency translation loss (gain)	301	(1,091)	453	2,755
Changes in operating assets and liabilities:
Accounts receivable			16,265	(4,596)
Other assets – current			17,033	(9,541)
Other assets			(2,785)	2,543
Deferred revenue			2,778	(13)
Accounts payable and accrued expenses			(14,944)	(34,375)
Other tax liabilities			(531)	(4,165)
Other liabilities			1,128	(297)
Net cash provided by continuing operating activities			49,697	3,097
Net cash used in discontinued operating activities				(6,966)
Net cash provided by (used in) operating activities			49,697	(3,869)
Cash flows provided by (used in) investing activities:
Purchases of property and equipment			(776)	(829)
Acquisition of trademarks			(284)	(109)
Proceeds from sale of Galore Media				250
Proceeds from sale of discontinued operation, net of cash sold				336,675
Decrease in cash and cash equivalents from deconsolidation of joint venture				(1,853)
Net cash (used in) provided by continuing investing activities			(7,304)	328,571
Net cash used in discontinued investing activities				(84)
Net cash (used in) provided by investing activities			(7,304)	328,487
Cash flows provided by (used in) financing activities:
Prepaid financing costs			(5,423)	(7,145)
Proceeds from Variable Funding Notes, net of discount and fees				73,437
Proceeds from long-term debt, net of discount and fees			95,700	288,000
Payment of long-term debt			(145,655)	(583,157)
Repurchase of convertible notes				(58,810)
Payment of make-whole premium on repayment of long-term debt				(13,933)
Proceeds from sale of trademarks and related notes receivable from consolidated JVs			195	6,927
Distributions to non-controlling interests			(13,693)	(3,850)
Tax benefit related to amortization of convertible notes' discount			35	78
Cost of shares repurchased on vesting of restricted stock			(147)	(1,078)
Net cash used in continuing financing activities			(68,988)	(299,531)
Net cash used in discontinued financing activities				(23,873)
Net cash used in financing activities			(68,988)	(323,404)
Effect of exchange rate changes on cash and restricted cash			(466)	2,831
Net (decrease) increase in cash and cash equivalents, and restricted cash			(27,061)	4,045
Cash, cash equivalents, and restricted cash from continuing operations, beginning of period			114,693	314,383	$ 314,383
Cash and cash equivalents from discontinued operations, beginning of period				12,297	12,297
Cash, cash equivalents, and restricted cash, beginning of period			114,693	326,680	326,680
Cash, cash equivalents, and restricted cash, end of period	87,632	330,725	87,632	330,725	114,693
Less: Cash and cash equivalents from discontinued operations, end of period
Cash, cash equivalents, and restricted cash of continuing operations, end of period	$ 87,632	$ 330,725	87,632	330,725	$ 114,693
Cash paid during the period:
Income taxes (net of refunds received)			(6,413)	34,836
Interest			30,334	51,657
NGX
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Loss on sale of NGX				79
Cash flows provided by (used in) investing activities:
Proceeds from sale of NGX				2,561
Iconix Canada
Cash flows provided by (used in) investing activities:
Acquisition of remaining interest in Iconix Canada			(7,053)	(11,177)
Complex Media
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Gain on sale of Complex Media			(958)	(2,728)
Cash flows provided by (used in) investing activities:
Proceeds from sale of Complex Media			958	2,728
Iconix MENA
Cash flows provided by (used in) investing activities:
Acquisition of additional interest in Subsidiaries				(1,800)
Iconix Southeast Asia
Cash flows provided by (used in) investing activities:
Acquisition of trademarks			(2,120)
Iconix Australia
Cash flows provided by (used in) investing activities:
Acquisition of additional interest in Subsidiaries			(649)
Buffalo Brand Joint Venture
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Settlement of note receivable related to formation of Buffalo joint venture			1,141
Cash flows provided by (used in) investing activities:
Proceeds received from note			1,409
American Greetings Corporation
Cash flows provided by (used in) investing activities:
Proceeds received from note				1,250
Badgley Mischka and Sharper Image Trademarks in Certain International Joint Ventures
Cash flows provided by (used in) investing activities:
Acquisition of Badgley Mischka and Sharper Image trademarks in certain international joint ventures			(1,289)
Badgley Mischka in Certain International Joint Ventures
Cash flows provided by (used in) investing activities:
Proceeds from sale of rights			$ 2,500
Badgley Mischka Canada
Cash flows provided by (used in) investing activities:
Proceeds from sale of rights				375
Sharper Image Canada
Cash flows provided by (used in) investing activities:
Proceeds from sale of rights				$ 500