Taxes on Income - Reconciliation Of Actual Tax Rate To Federal Statutory Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Feb. 02, 2019	Feb. 03, 2018
Reconciliation of actual tax rate to federal statutory rate
Tax expense at U.S. statutory rate	$ (2,023)	$ (17,329)
State income taxes, net of federal income tax benefit	265	(942)
Change in U.S. federal statutory rate		7,350
Stock-based compensation	262	1,517
Stock warrants		425
Adjustments to unrecognized tax benefits	(380)	(794)
Nondeductible expenses	12	18
Nondeductible transaction costs	21	250
Valuation allowance	4,616	10,688
Foreign Taxes	381	562
Exchange rate changes		1,427
Other	(466)	(142)
Tax provision	$ 2,688	$ 3,030
Tax expense at U.S. statutory rate	21.00%	32.80%
State income taxes, net of federal income tax benefit	(2.80%)	1.80%
Change in U.S. federal statutory rate		(13.90%)
Stock-based compensation	(2.70%)	(2.90%)
Stock warrants		(0.80%)
Adjustments to unrecognized tax benefits	3.90%	1.50%
Nondeductible expenses	(0.10%)
Nondeductible transaction costs	(0.20%)	(0.50%)
Valuation allowance	(47.90%)	(20.30%)
Foreign Taxes	(4.00%)	(1.10%)
Exchange rate changes		(2.70%)
Other	4.80%	0.40%
Tax provision	(28.00%)	(5.70%)