Fair Value Measurements-valuation (Details)	3 Months Ended	12 Months Ended
	Apr. 30, 2016	Jan. 30, 2016
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Weighted average cost of capital	15.00%	15.00%
Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Unobservable Input, Annual Sales Growth	0.00%	0.00%
Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Unobservable Input, Annual Sales Growth	11.40%	3.50%