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CONSOLIDATED BALANCE SHEETS (Unaudited) (PARENTHETICAL) - $ / shares
Apr. 30, 2020
Jan. 31, 2020
Apr. 30, 2019
Preferred Stock, par value $ 0.01 $ 0.01 $ 0.01
Preferred Stock, shares authorized 5,000,000 5,000,000 5,000,000
Preferred Stock, shares issued 0 0 0
Treasury Stock, shares 11,480,231 11,443,308 11,388,021
Common Stock Class Undefined      
Common Stock, par value $ 0.01 $ 0.01 $ 0.01
Common Stock, shares authorized 100,000,000 100,000,000 100,000,000
Common Stock, shares issued 28,000,364 27,859,328 27,866,510
Common Stock, shares outstanding 28,000,364 27,859,328 27,866,510
Class A Common Stock      
Common Stock, par value $ 0.01 $ 0.01 $ 0.01
Common Stock, shares authorized 30,000,000 30,000,000 30,000,000
Common Stock, shares issued 6,608,548 6,603,645 6,586,780
Common Stock, shares outstanding 6,608,548 6,603,645 6,586,780