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Property and Equipment
 9 Months Ended
Jun. 25, 2022
Property, Plant and Equipment [Abstract]  
Property and Equipment Property and Equipment
Property and equipment at June 25, 2022 and September 25, 2021 consists of the following (in thousands):
June 25, 2022September 25, 2021
Computer equipment and software, furniture and fixtures, and test equipment$39,940 $34,268 
Leasehold improvements2,918 2,909 
Total property and equipment42,858 37,177 
Less accumulated depreciation(22,348)(18,560)
Property and equipment, net$20,510 $18,617 
Depreciation expense was $1.3 million for the three months ended June 25, 2022, $3.9 million for the nine months ended June 25, 2022, $1.3 million for the three months ended June 26, 2021, and $2.9 million for the nine months ended June 26, 2021.