Consolidated Balance Sheets (Parenthetical) - $ / shares	Oct. 31, 2015	May. 02, 2015	Nov. 01, 2014
Redeemable Preferred Shares, par value	$ 0.001	$ 0.001	$ 0.001
Redeemable Preferred Shares, shares authorized	5,000,000	5,000,000	5,000,000
Redeemable Preferred Shares, shares issued	0	204,000	204,000
Common stock, par value	$ 0.001	$ 0.001	$ 0.001
Common stock, shares authorized	300,000,000	300,000,000	300,000,000
Common stock, shares issued	110,595,000	98,115,000	93,956,000
Treasury stock, shares	34,961,000	34,841,000	34,519,000