Taxes on Income - Reconciliation Of Actual Tax Rate To Federal Statutory Rate (Details) - USD ($) $ in Thousands	1 Months Ended	11 Months Ended	12 Months Ended
	Feb. 03, 2018	Dec. 31, 2017	Feb. 03, 2018	Jan. 28, 2017	Jan. 30, 2016
Reconciliation of actual tax rate to federal statutory rate
Tax expense at U.S. statutory rate, Amount			$ (17,329)	$ (1,858)	$ 4,349
State income taxes, net of federal income tax benefit			(942)	179	187
Change in U.S. federal statutory rate			7,350
Stock-based compensation			1,517
Stock warrants			425
Adjustments to unrecognized tax benefits			(794)	233	(189)
Nondeductible expenses			18	151	17
Nondeductible transaction costs			250	2,894
Valuation allowance			10,688	942
Foreign Taxes			562	163
Exchange rate changes			1,427
Other			(142)	554	(6)
Tax provision			$ 3,030	$ 3,258	$ 4,358
Tax expense at U.S. statutory rate (as a percent)	21.00%	32.80%	32.80%	34.00%	34.00%
State income taxes, net of federal income tax benefit (as a percent)			1.80%	(3.30%)	1.50%
Change in U.S. federal statutory rate (as a percent)			(13.90%)
Stock-based compensation (as a percent)			(2.90%)
Stock warrants (as a percent)			(0.80%)
Adjustments to unrecognized tax benefits (as a percent)			1.50%	(4.30%)	(1.50%)
Nondeductible expenses (as a percent)				(2.80%)	0.10%
Nondeductible transaction costs (as a percent)			(0.50%)	(53.00%)
Valuation allowance (as a percent)			(20.30%)	(17.20%)
Foreign Taxes (as a percent)			(1.10%)	(2.90%)
Exchange rate changes (As a percent)			(2.70%)
Other (as a percent)			0.40%	(10.10%)
Tax provision (as a percent)			(5.70%)	(59.60%)	34.10%