Basis of Presentation (Details) |
3 Months Ended | 9 Months Ended | |
|---|---|---|---|
|
Aug. 02, 2015
USD ($)
|
Jan. 31, 2016
USD ($)
segment
|
Jan. 25, 2015
USD ($)
|
|
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | |||
| Number of reportable segments | segment | 1 | ||
| Impairment of long-lived assets | $ 1,901,000 | $ 1,901,000 | $ 5,767,000 |
| Income Approach Valuation Technique | Impaired Long-Lived Assets | |||
| Property, Plant and Equipment | |||
| Estimated fair value | $ 0 | ||