Equity and Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020	Jan. 31, 2021
Equity [Abstract]
Quarterly dividends declared (in usd per share)	$ 0.5625
Preferred stock, shares outstanding (in shares)	1,223,000		1,223,000		1,038,000
Preferred stock, liquidation preference	$ 30,600		$ 30,600
Compensation expense related to stock-based awards granted	$ 115	$ 219	$ 224	$ 449