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Marketable Securities (Tables)
 3 Months Ended
Apr. 29, 2023
Investments, Debt and Equity Securities [Abstract]  
Investments in Marketable Securities
The following table summarizes our investments in marketable securities at April 29, 2023, January 28, 2023 and April 30, 2022 (in thousands):
 April 29, 2023
 Cost or
Amortized Cost		Gross Unrealized
Holding Gains		Gross
Unrealized
Holding
Losses		Estimated
Fair Value
Commercial paper$39,266 $385 $— $39,651 
Fixed income securities10,044 — — 10,044 
Total marketable securities$49,310 $385 $— $49,695 
 January 28, 2023
 Cost or
Amortized Cost		Gross Unrealized
Holding Gains		Gross
Unrealized
Holding
Losses		Estimated
Fair Value
Commercial paper$29,570 $180 $— $29,750 
Fixed income securities10,003 — — 10,003 
Total marketable securities$39,573 $180 $— $39,753 
 April 30, 2022
 Cost or
Amortized Cost		Gross Unrealized
Holding Gains		Gross
Unrealized
Holding
Losses		Estimated
Fair Value
Commercial paper$39,921 $19 $(19)$39,921 
Fixed income securities11,076 — — 11,076 
Total marketable securities$50,997 $19 $(19)$50,997 
Gain (Loss) on Investments
The following table summarizes our gains on investments for commercial paper (in thousands):
Thirteen Weeks Ended
April 29,
2023		April 30,
2022
Gains on investments$172 $25