Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares	Jul. 31, 2021	May 01, 2021
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
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, shares issued (in shares)	101,688,458	101,675,858
Treasury Stock, Common [Member]
Treasury stock, shares (in shares)	8,374,112	8,374,112
Series C Preferred Stock [Member] | Treasury Stock, Preferred [Member]
Treasury stock, shares (in shares)	150,000	150,000