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Fair value measurements (Tables)
6 Months Ended
Mar. 28, 2020
Fair Value Disclosures [Abstract]  
Summary of fair value measurements by level for the assets measured on a recurring basis

The following table summarizes fair value measurements by level for the assets measured at fair value on a recurring basis as of March 28, 2020 and September 28, 2019:
 
March 28, 2020
(In thousands)
Level 1
 
Level 2
 
Level 3
 
Total
Assets:
 
 
 
 
 
 
 
Money market funds (cash equivalents)
$
161,159

 
$

 
$

 
$
161,159


 
September 28, 2019
(In thousands)
Level 1
 
Level 2
 
Level 3
 
Total
Assets:
 
 
 
 
 
 
 
Money market funds (cash equivalents)
$
267,806

 
$

 
$

 
$
267,806