Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	May 05, 2018	Apr. 29, 2017
Operating Loss Carryforwards
Income tax expense	$ 43	$ 52
Effective rate, percent	0.80%	1.40%
Federal tax benefit	$ 26,100
Tax credit carryforward	800
State
Operating Loss Carryforwards
Net tax benefit available	$ 4,500