Organization and Summary of Significant Accounting Policies - Restricted Stock and Options Outstanding Used in Per Share Calculations (Detail) - shares shares in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Stock options (in shares)	48	79
Restricted stock (in shares)	17	3
Total dilutive shares	65	82