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Short-Term Investments
6 Months Ended
Apr. 03, 2021
Cash, Cash Equivalents, and Short-term Investments [Abstract]  
Short-Term Investments SHORT-TERM INVESTMENTS
 
We consider all highly liquid investments with maturities of three months or less at the time of purchase to be cash equivalents. Investments classified as available-for-sale are reported at fair value with unrealized gains and losses, net of related income taxes, recorded as a separate component of other comprehensive income ("OCI") in stockholders’ equity until realized. Interest and amortization of premiums and discounts for debt securities are included in interest income. Gains and losses on securities sold are determined based on the specific identification method and are included in other income (expense).

Cash, cash equivalents and short-term investments consist of the following (in thousands):
 
 April 3, 2021
 Cost BasisUnrealized
Gains
Unrealized
Losses
Fair Value
Cash and cash equivalents$353,049 $— $— $353,049 
   
Short-term investments:    
Available-for-sale securities:    
U.S. Treasury and agency obligations$15,090 $38 $— $15,128 
Total short-term investments$15,090 $38 $— $15,128 
 
 October 3, 2020
 Cost BasisUnrealized
Gains
Unrealized
Losses
Fair Value
Cash and cash equivalents$440,258 $— $— $440,258 
   
Short-term investments:    
Available-for-sale securities:    
       U.S. Treasury and agency obligations$35,311 $36 $(1)$35,346 
Total short-term investments$35,311 $36 $(1)$35,346 
There were less than $0.1 million of unrealized gains and less than $0.1 million of unrealized gains and losses at April 3, 2021 and October 3, 2020, respectively. None of the $1,000 in unrealized losses at October 3, 2020 were considered to be other-than-temporary impairments.