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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY AND TEMPORARY EQUITY (Parenthetical) - $ / shares
3 Months Ended
Jul. 31, 2020
Apr. 30, 2020
Jan. 31, 2020
Jul. 31, 2019
Apr. 30, 2019
Jan. 31, 2019
Dividends - Common (in dollars per share) $ 0.075 $ 0.075 $ 0.075 $ 0.075 $ 0.075 $ 0.075
Treasury stock (in shares) 42,100          
Series B Preferred Stock            
Dividends - Preferred (in dollars per share) $ 2.19 2.19 2.19 2.19 2.19 2.19
Series B2 Preferred Stock            
Dividends - Preferred (in dollars per share) $ 10 $ 10 $ 10 $ 10 $ 10 $ 10