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Fair value measurements (Tables)
9 Months Ended
Jun. 27, 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 June 27, 2020 and September 28, 2019:
June 27, 2020
(In thousands)Level 1Level 2Level 3Total
Assets:
Money market funds (cash equivalents)$161,352  $—  $—  $161,352  
September 28, 2019
(In thousands)Level 1Level 2Level 3Total
Assets:
Money market funds (cash equivalents)$267,806  $—  $—  $267,806