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Marketable Securities (Tables)
6 Months Ended
Jul. 31, 2022
Investments, Debt and Equity Securities [Abstract]  
Schedule of Marketable Securities
The following is a summary of our marketable securities (in thousands): 
As of July 31, 2022
Amortized CostGross
Unrealized
Gains
Gross
Unrealized
Losses
Estimated Fair Value
Commercial paper$27,244 $— $— $27,244 
Corporate bonds70,607 — (534)70,073 
Municipal bonds19,369 — (102)19,267 
Total marketable securities$117,220 $— $(636)$116,584 
As of January 31, 2022
Amortized CostGross
Unrealized
Gains
Gross
Unrealized
Losses
Estimated Fair Value
Commercial paper$15,343 $— $— $15,343 
Corporate bonds91,735 — (303)91,432 
Municipal bonds9,197 — (32)9,165 
Total marketable securities$116,275 $— $(335)$115,940