Accounts Receivable (Detail) - USD ($) $ in Thousands |
Jan. 29, 2017 |
May 01, 2016 |
Jan. 31, 2016 |
May 03, 2015 |
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|---|---|---|---|---|---|---|---|
| Accounts, Notes, Loans and Financing Receivable [Line Items] | |||||||
| Customers | $ 24,339 | $ 25,531 | $ 28,684 | ||||
| Accounts receivable, net | 22,726 | 23,481 | [1] | 26,784 | |||
| Allowance for doubtful accounts [Member] | |||||||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | |||||||
| Valuation allowance, balance | (397) | (1,088) | (814) | $ (851) | |||
| Reserve for returns and allowances and discounts [Member] | |||||||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | |||||||
| Valuation allowance, balance | $ (1,216) | $ (962) | $ (1,086) | $ (738) | |||
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