Quarterly report pursuant to Section 13 or 15(d)

Convertible Preferred Stock and Stockholders Equity (Deficit) - Summary of Changes In Components of Accumulated Other Comprehensive Income (Loss) (Details)

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Convertible Preferred Stock and Stockholders Equity (Deficit) - Summary of Changes In Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
3 Months Ended
Apr. 30, 2021
Apr. 30, 2020
Accumulated Other Comprehensive Income Loss [Line Items]    
Beginning Balance $ (803,704) $ (799,511)
Ending Balance 1,899,541 (835,301)
Foreign Currency Translation Adjustments    
Accumulated Other Comprehensive Income Loss [Line Items]    
Beginning Balance (12,504) 6,226
Other comprehensive income (loss), net of tax 4,254 8,313
Ending Balance (8,250) 14,539
Unreleased Gain (Loss) on Marketable Securities    
Accumulated Other Comprehensive Income Loss [Line Items]    
Beginning Balance (17)  
Other comprehensive income (loss), net of tax (27)  
Ending Balance (44)  
Accumulated Other Comprehensive Income (Loss)    
Accumulated Other Comprehensive Income Loss [Line Items]    
Beginning Balance (12,521) 6,226
Other comprehensive income (loss), net of tax 4,227 8,313
Ending Balance $ (8,294) $ 14,539