XML 54 R40.htm IDEA: XBRL DOCUMENT v3.22.1
Organization and Summary of Significant Accounting Policies - Additional Information (Detail)
12 Months Ended
Jan. 31, 2022
USD ($)
Reportingunit
Jan. 31, 2021
USD ($)
Jan. 31, 2020
USD ($)
Summary Of Significant Accounting Policies [Line Items]      
Material inventory losses recognized $ 0 $ 0 $ 0
Number of reporting unit for goodwill impairment | Reportingunit 1    
Goodwill impairment $ 0 $ 0 $ 0
Impairment of long-lived assets 0    
Impairment losses on investment $ 0    
Expected dividend yield 0.00% 0.00% 0.00%
Prepaid Expenses and Other Current Assets [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Grants recorded $ 1,300,000    
Other Non-current Assets [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Grants recorded $ 600,000