XML 48 R37.htm IDEA: XBRL DOCUMENT v3.22.2.2
Cash, Cash Equivalents and Short-Term Investments - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 31, 2022
Jul. 31, 2022
Jul. 31, 2021
Jan. 31, 2022
Cash and Cash Equivalents [Line Items]        
Cash       $ 884,700
Interest and investment income $ 3,100 $ 3,100    
Short-term investments $ 3,600 3,600    
Net amortization of premiums or discounts on short-term investments   $ 1,293 $ 0  
Certificates of Deposit        
Cash and Cash Equivalents [Line Items]        
Short-term investments       $ 50,000