Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Cash flows from operating activities:
Net loss from continuing operations	$ (75,138)		$ (9,948)	$ (44,522)	$ (2,750)
Income from discontinued operations			59,127		51,441
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation of property and equipment				1,135	831
Amortization of trademarks and other intangibles			200	151	392
Amortization of deferred financing costs				1,587	2,846
Amortization of debt discount				5,411	8,928
Third party fees associated with the issuance of 5.75% Convertible Notes				4,958
Stock-based compensation expense				1,518	4,746
Provision for doubtful accounts				1,744	4,929
Writeoff of contract assets				417
Earnings on equity investments in joint ventures				(1,245)	(1,992)
Distributions from equity investments				1,913	2,291
Gain on deconsolidation of joint venture			(3,772)		(3,772)
Gain on sale of trademarks, net	(125)			(1,268)
Trademark impairment	73,335			73,335
Goodwill impairment	37,812			37,812	0
Mark to market adjustment on convertible note				(56,496)
Gain on debt to equity conversions				(1,057)
Loss (gain) on extinguishment of debt		$ (4,500)	13,919	(4,473)	19,400
Income on other equity investment				296
Deferred income tax benefit				(5,253)	(6,453)
Foreign currency translation loss	704		3,416	152	3,845
Changes in operating assets and liabilities:
Accounts receivable				18,668	(1,490)
Other assets – current				2,779	(4,925)
Other assets				(2,481)	789
Deferred revenue				3,715	(918)
Accounts payable and accrued expenses				(457)	(2,236)
Other tax liabilities				(531)	(4,165)
Other liabilities				1,357	(281)
Net cash provided by continuing operating activities				39,348	20,015
Net cash used in discontinued operating activities					(734)
Net cash provided by operating activities				39,348	19,281
Cash flows provided by (used in) investing activities:
Purchases of property and equipment				(571)	(755)
Acquisition of trademarks				(256)	(52)
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				(4,244)	333,465
Net cash used in discontinued investing activities					(84)
Net cash (used in) provided by investing activities				(4,244)	333,381
Cash flows provided by (used in) financing activities:
Prepaid financing costs				(5,423)
Proceeds from long-term debt, net of discount and fees				95,700
Payment of long-term debt				(134,018)	(330,080)
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				(10,168)	(3,843)
Tax benefit related to amortization of convertible notes' discount				35	44
Cost of shares repurchased on vesting of restricted stock				(146)	(1,066)
Net cash used in continuing financing activities				(53,825)	(341,951)
Net cash used in discontinued financing activities					(23,596)
Net cash used in financing activities				(53,825)	(365,547)
Effect of exchange rate changes on cash and restricted cash				(411)	(760)
Net decrease in cash and cash equivalents, and restricted cash				(19,132)	(13,645)
Cash, cash equivalents, and restricted cash from continuing operations, beginning of period		114,693		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		114,693	326,680	326,680
Cash, cash equivalents, and restricted cash, end of period	95,561		313,035	95,561	313,035	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	$ 95,561		$ 313,035	95,561	313,035	$ 114,693
Cash paid during the period:
Income taxes (net of refunds received)				5,031	8,135
Interest				20,246	13,629
Non-cash investing and financing activities:
Transaction costs related to the sale of the Entertainment segment included in accrued expenses					7,629
Shares issued upon conversion of debt				12,694
Iconix Canada
Cash flows provided by (used in) investing activities:
Acquisition of remaining interest in Iconix Canada				(4,875)
Complex Media
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Gain on sale of Complex Media				(958)
Cash flows provided by (used in) investing activities:
Proceeds from sale of Complex Media				958
Iconix MENA
Cash flows provided by (used in) investing activities:
Acquisition of additional interest in Iconix MENA					(1,800)
Iconix Southeast Asia
Cash flows provided by (used in) investing activities:
Acquisition of trademarks				(2,120)
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 interest in Badgley Mischka in certain international joint ventures				$ 2,500