CONSOLIDATED BALANCE SHEETS (Unaudited) (PARENTHETICAL) - $ / shares	Jul. 31, 2021	Jan. 31, 2021	Jul. 31, 2020
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	11,881,311	11,492,591	11,490,610
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	28,414,699	28,078,241	28,063,179
Common Stock, shares outstanding	28,414,699	28,078,241	28,063,179
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	6,536,960	6,610,509	6,608,548
Common Stock, shares outstanding	6,536,960	6,610,509	6,608,548