Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Licensing revenue	$ 27,951	$ 35,942
Type of Revenue [Extensible List]	us-gaap:LicenseMember	us-gaap:LicenseMember
Selling, general and administrative expenses	$ 17,150	$ 18,094
Depreciation and amortization	273	492
Equity (earnings) loss on joint ventures	1,645	(1,042)
Trademark impairment	13,733
Operating income (loss)	(4,850)	18,398
Other expenses (income):
Interest expense	16,713	14,504
Interest income	(40)	(72)
Other (income) loss, net	(795)	(19,935)
Foreign currency translation (gain) loss	(65)	627
Other expenses (income) – net	15,813	(4,876)
Income (loss) before income taxes	(20,663)	23,274
(Benefit) Provision for income taxes	(5)	1,968
Net income (loss)	(20,658)	21,306
Less: Net income attributable to non-controlling interest	825	3,361
Net income (loss) attributable to Iconix Brand Group, Inc.	$ (21,483)	$ 17,945
Earnings (loss) per share:
Basic	$ (1.86)	$ 2.12
Diluted	$ (1.86)	$ (0.01)
Weighted average number of common shares outstanding:
Basic	11,772	8,465
Diluted	11,772	44,786