Revenue Recognition - Additional Information (Detail) - USD ($)	6 Months Ended
	Oct. 31, 2015	May. 02, 2015	Nov. 01, 2014
Deferred Revenue Arrangement [Line Items]
Estimated life of NOOK, years	2 years
Nook
Deferred Revenue Arrangement [Line Items]
Recognized over	2 years
Deferred revenue	$ 675,000	$ 2,406,000	$ 5,146,000
Nook | Minimum
Deferred Revenue Arrangement [Line Items]
Average percent, NOOK's sales price	0.00%
Nook | Maximum
Deferred Revenue Arrangement [Line Items]
Average percent, NOOK's sales price	4.00%
Annual Fee
Deferred Revenue Arrangement [Line Items]
Non-refundable, after first 30 days, annual fee	$ 25.00