XML 12 R39.htm IDEA: XBRL DOCUMENT v3.3.1.900
Accounts Receivable - Allowance for Returns and Allowances and Discounts (Detail) - Reserve for returns and allowances and discounts [Member] - USD ($)
$ in Thousands
6 Months Ended
Nov. 01, 2015
Nov. 02, 2014
Valuation and Qualifying Accounts Disclosure [Line Items]    
Beginning balance $ (738) $ (479)
Provision for returns, allowances and discounts (1,561) (1,334)
Credits issued 1,394 1,218
Ending balance $ (905) $ (595)