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The Company - Additional Information (Detail) $ in Thousands		1 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)	Nov. 02, 2019 USD ($) state store item	Nov. 03, 2018 USD ($)	Feb. 02, 2019 USD ($)	Feb. 03, 2018 USD ($)
Organization Consolidation and Presentation of Financial Statements
Number of galleries \| item			70
Number of outlet stores \| store			39
Number of states \| state			31
Number of waterworks showrooms \| item			15
Purchase of convertible note hedges			$ 91,350	$ 91,857
Original issuance and offering costs			4,636
Stockholders' deficit:
Accumulated deficit			(477,687)		$ (392,537)
Overstatement of net income
Organization Consolidation and Presentation of Financial Statements
Revision due to prior year misstatement in current year financial statements, amount				900		$ 1,400
Overstatement of retained earnings
Organization Consolidation and Presentation of Financial Statements
Revision due to prior year misstatement in current year financial statements, amount				2,300		1,400
Understatement of accumulated deficit
Organization Consolidation and Presentation of Financial Statements
Revision due to prior year misstatement in current year financial statements, amount					2,300
Understatement of other non-current obligations
Organization Consolidation and Presentation of Financial Statements
Revision due to prior year misstatement in current year financial statements, amount					3,300
Overstatement of other current liabilities
Organization Consolidation and Presentation of Financial Statements
Revision due to prior year misstatement in current year financial statements, amount					1,000
Understatement of net cash provided by operating activities
Organization Consolidation and Presentation of Financial Statements
Revision due to prior year misstatement in current year financial statements, amount					9,200
Understatement of net cash used in investing activities
Organization Consolidation and Presentation of Financial Statements
Revision due to prior year misstatement in current year financial statements, amount					9,200
Convertible senior notes due 2024
Organization Consolidation and Presentation of Financial Statements
Debt instrument, principal amount			$ 350,000
Proceeds from issuance of warrants		$ 304,100
Original issuance and offering costs		4,800
Convertible senior notes due 2024 \| Convertible bond hedge and warrant transactions
Organization Consolidation and Presentation of Financial Statements
Purchase of convertible note hedges		91,400
Proceeds from issuance of warrants	$ 50,200	50,200
Convertible senior notes due 2024 \| Private Placement
Organization Consolidation and Presentation of Financial Statements
Debt instrument, principal amount	$ 350,000	$ 350,000
Debt instrument, interest rate	0.00%	0.00%
As Reported
Stockholders' deficit:
Accumulated deficit				245,900	(376,800)	152,400
As Revised
Stockholders' deficit:
Accumulated deficit				$ 243,600	$ (379,100)	$ 151,000