Consolidated Statements of Shareholders' Equity (Parentheticals)				12 Months Ended
	Apr. 28, 2012 Preferred Stock [Member] Series C Preferred Stock [Member]	Apr. 30, 2011 Preferred Stock [Member] Series C Preferred Stock [Member]	May 01, 2010 Preferred Stock [Member] Series C Preferred Stock [Member]	Apr. 27, 2013 Preferred Stock [Member] Series D Preferred Stock [Member]	Apr. 27, 2013 Common Stock [Member]	Apr. 28, 2012 Common Stock [Member]	Apr. 30, 2011 Common Stock [Member]	Apr. 27, 2013 Preferred Treasury Stock [Member]	Apr. 28, 2012 Preferred Treasury Stock [Member]	Apr. 30, 2011 Preferred Treasury Stock [Member]	Apr. 27, 2013 Common Treasury Stock [Member]	Apr. 28, 2012 Common Treasury Stock [Member]	Apr. 30, 2011 Common Treasury Stock [Member]
Beginning of period	150,000	150,000	150,000		50,322,000	50,262,000	50,189,000	150,000	150,000	150,000	4,033,000	4,033,000	4,033,000
Beginning of period				400,000
End of period	150,000	150,000	150,000	400,000		50,322,000	50,262,000	150,000	150,000	150,000	4,033,000	4,033,000	4,033,000
Options exercised					40,000	60,000	73,000