Quarterly report pursuant to Section 13 or 15(d)

Consolidated Balance Sheet Detail - Property and Equipment, Net (Detail)

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Consolidated Balance Sheet Detail - Property and Equipment, Net (Detail) - USD ($)
$ in Thousands
Apr. 30, 2021
Jan. 31, 2021
Property Plant And Equipment [Line Items]    
Property and Equipment, Gross $ 3,595 $ 10,309
Less: Accumulated depreciation and amortization (3,117) (9,704)
Total property and equipment, net 478 605
Computer Equipment, Software and Demonstration Equipment [Member]    
Property Plant And Equipment [Line Items]    
Property and Equipment, Gross 3,182 9,765
Office Furniture and Equipment [Member]    
Property Plant And Equipment [Line Items]    
Property and Equipment, Gross 259 306
Leasehold Improvements [Member]    
Property Plant And Equipment [Line Items]    
Property and Equipment, Gross $ 154 $ 238