Consolidated Statements of Shareholders' Equity (Parentheticals)							12 Months Ended					12 Months Ended
	Apr. 27, 2013 Series C Preferred Stock [Member] Preferred Stock [Member]	Apr. 28, 2012 Series C Preferred Stock [Member] Preferred Stock [Member]	Apr. 30, 2011 Series C Preferred Stock [Member] Preferred Stock [Member]	Apr. 27, 2013 Series C Preferred Stock [Member] Treasury Stock [Member]	Apr. 28, 2012 Series C Preferred Stock [Member] Treasury Stock [Member]	Apr. 30, 2011 Series C Preferred Stock [Member] Treasury Stock [Member]	May 03, 2014 Series D Preferred Stock [Member] Preferred Stock [Member]	Apr. 27, 2013 Series D Preferred Stock [Member] Preferred Stock [Member]	Apr. 27, 2013 Common Treasury Stock [Member] Treasury Stock [Member]	Apr. 28, 2012 Common Treasury Stock [Member] Treasury Stock [Member]	Apr. 30, 2011 Common Treasury Stock [Member] Treasury Stock [Member]	May 03, 2014 Common Stock [Member]	Apr. 27, 2013 Common Stock [Member]	Apr. 28, 2012 Common Stock [Member]
Beginning of year, shares	150,000	150,000	150,000	150,000	150,000	150,000	400,000		4,033,000	4,033,000	4,033,000	50,362,000	50,322,000	50,262,000
Series D preferred issued (redeemed), shares							(160,000)	400,000
End of year, shares	150,000	150,000	150,000	150,000	150,000	150,000	240,000	400,000	4,033,000	4,033,000	4,033,000	50,368,000	50,362,000	50,322,000
Stock options exercised, shares												6,000	40,000	60,000