Intangible Assets - Summary of Balances of the Company's Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 29, 2023	Jan. 28, 2024
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 85,270	$ 85,270
Accumulated Amortization	(22,724)	(27,733)
Accumulated Impairment		(57,537)
Impairment	(40,585)
Net Carrying Amount	$ 21,961	0
Remaining Useful Life (Years)	2 years 10 months 24 days
MIRROR brand
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 26,500	26,500
Accumulated Amortization	(3,423)	(4,089)
Accumulated Impairment		(22,411)
Impairment	(20,077)
Net Carrying Amount	$ 3,000	0
Remaining Useful Life (Years)	3 years
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 28,000	28,000
Accumulated Amortization	(7,492)	(7,492)
Accumulated Impairment		(20,508)
Impairment	(20,508)
Net Carrying Amount	0	0
Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	25,500	25,500
Accumulated Amortization	(8,956)	(12,632)
Accumulated Impairment		(12,868)
Impairment	0
Net Carrying Amount	$ 16,544	0
Remaining Useful Life (Years)	3 years
Content
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 5,000	5,000
Accumulated Amortization	(2,583)	(3,250)
Accumulated Impairment		(1,750)
Impairment	0
Net Carrying Amount	$ 2,417	0
Remaining Useful Life (Years)	2 years 4 months 24 days
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 270	270
Accumulated Amortization	(270)	(270)
Accumulated Impairment		0
Impairment	0
Net Carrying Amount	$ 0	$ 0