Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Summary of Marketable Securities by Security Type (Detail)

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Fair Value Measurements - Summary of Marketable Securities by Security Type (Detail)
$ in Thousands
Jan. 31, 2021
USD ($)
Schedule Of Available For Sale Securities [Line Items]  
Amortized Cost $ 249
Gross Unrealized Gains 3
Fair Value 252
U.S. Treasury Notes and Bonds [Member]  
Schedule Of Available For Sale Securities [Line Items]  
Amortized Cost 249
Gross Unrealized Gains 3
Fair Value $ 252