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Supplemental Financial Information
 12 Months Ended
Apr. 27, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Supplemental Financial Information Supplemental Financial Information
Inventories
Inventories consisted of the following (in thousands):
April 27, 2024April 29, 2023
Raw materials$9,415 $17,456 
Work in process7,470 7,200 
Finished goods9,022 21,367 
$25,907 $46,023 
Property and Equipment, Net
Property and equipment consisted of the following (in thousands):
April 27, 2024April 29, 2023
Computer equipment and software$18,271 $13,942 
Laboratory equipment19,840 15,577 
Production equipment27,608 19,783 
Leasehold improvements2,525 2,005 
Others534 632 
Construction in progress3,616 6,300 
72,394 58,238 
Less: accumulated depreciation and amortization(28,729)(18,017)
$43,665 $40,222 
Depreciation and amortization expense, excluding the assets impairment charges, for the years ended April 27, 2024, April 29, 2023 and April 30, 2022, was $13.8 million, $9.5 million, and $4.8 million, respectively. Construction in progress and production equipment primarily includes mask set costs capitalized relating to the Company’s products.
During the years ended April 27, 2024, April 29, 2023 and April 30, 2022, the Company recorded impairment charges of $0.8 million, $2.4 million and $4.9 million, respectively. Generally, the impairment charges were related to impairment of property and equipment or third-party IP licenses for future products that did not reach production qualification.
Accrued Expenses and Other Current Liabilities
Accrued expenses and other current liabilities consisted of the following (in thousands):
April 27, 2024April 29, 2023
Accrued expenses$9,610 $7,555 
Current payables relating to purchases of property and equipment5,950 4,269 
Current portion of operating lease liabilities2,741 2,630 
$18,301 $14,454 
Other Non-current Liabilities
Other non-current liabilities consisted of the following (in thousands):
April 27, 2024April 29, 2023
Non-current payables relating to purchases of property and equipment$4,950 $5,049 
Non-current deferred revenue128 380 
Other non-current liabilities903 324 
$5,981 $5,753