Consolidated Balance Sheets (Unaudited) (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended	12 Months Ended
	Oct. 27, 2012	Apr. 28, 2012
Allowance for trade receivables (in Dollars)	$ 450	$ 399
Preferred stock par value (in Dollars per share)	$ 1	$ 1
Preferred stock, shares authorized (in Shares)	1,000,000	1,000,000
Preferred stock, shares issued (in Shares)	150,000	150,000
Preferred stock, dividend rate	7.00%	7.00%
Preferred stock, aggregate liquidation preference (in Dollars)	$ 15,000	$ 15,000
Common stock, par value (in Dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in Shares)	75,000,000	75,000,000
Common stock, shares issued (in Shares)	50,338,279	50,321,559
Preferred Treasury Stock [Member]
Treasury Stock, shares (in Shares)	150,000	150,000
Common Treasury Stock [Member]
Treasury Stock, shares (in Shares)	4,032,784	4,032,784