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Related Party Transactions (Details) - USD ($)		3 Months Ended		9 Months Ended		18 Months Ended
Related Party Transactions (Details) - USD ($)	Oct. 26, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Related Party Transaction [Line Items]
Price for common shares of Xcel (in dollars per share)				$ 0.00
Revenue recorded from at-will-license		$ 10,932,000	$ 8,267,000	$ 30,371,000	$ 25,520,000
Benjamin Malka
Related Party Transaction [Line Items]
Price for common shares of Xcel (in dollars per share)	$ 7.00
Design fees due in the second year				2,400,000
Design fees due in the third year				2,400,000
Design fees due in the fourth year				2,400,000
Halston Operating Company, LLC
Related Party Transaction [Line Items]
Revenue recorded from at-will-license		$ 0	$ 590,000	$ 0	$ 1,810,000
H Halston \| Benjamin Malka
Related Party Transaction [Line Items]
Percentage of royalties	50.00%
Multiplying factor		400.00%		400.00%
Highline Collective \| Benjamin Malka
Related Party Transaction [Line Items]
Percentage of royalties	25.00%
Subsequent Developed Brand \| Benjamin Malka
Related Party Transaction [Line Items]
Percentage of royalties	20.00%
Private Label Brand \| Benjamin Malka
Related Party Transaction [Line Items]
Percentage of royalties	10.00%
Halston Operating Company \| Benjamin Malka
Related Party Transaction [Line Items]
Design fees						$ 1,200,000
Design fees due in the first year				$ 2,400,000
Receivable from related party		$ 0		$ 0		$ 1,500,000
House Of Halston LLC \| Director
Related Party Transaction [Line Items]
Ownership Percentage in HOH		25.00%		25.00%