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Stock-based Compensation (Tables)
6 Months Ended
Nov. 24, 2024
Share-Based Payment Arrangement [Abstract]  
Schedule of Stock Option Weighted Average Assumptions The following table displays the estimated fair value of stock options granted and the weighted average assumptions utilized:
 Three Months EndedSix Months Ended
 November 24, 2024November 24, 2024
Weighted-average grant date fair value$2.13$2.33
Assumptions:
Expected life (in years)4.354.35
Risk-free interest rate3.87%3.88%
Volatility52%53%
Dividend yield—%—%
Summary of Stock Option Activity
A summary of the activity under the Company’s stock option plans as of November 24, 2024 and changes during the fiscal quarter then ended is presented below:
 Options OutstandingWeighted-Average Exercise Price Per ShareTotal Intrinsic Value of Options Exercised
(in thousands)
Weighted-Average Remaining Contractual Term in YearsAggregate Intrinsic Value
(in thousands)
Options outstanding at May 26, 20242,112,591 $10.88 2.44$— 
Options granted95,525 5.00 
Options exercised— — $— 
Options forfeited(30,488)9.16 
Options expired(272,066)12.09 
Options outstanding at November 24, 20241,905,562 10.44 1.79$214 
Options exercisable at November 24, 20241,726,328 10.74 1.37214 
Summary of Stock-based Compensation Activity A summary of the Company’s RSU award activity as of November 24, 2024 and changes during the fiscal quarter then ended is presented below:
 Restricted Stock Units OutstandingWeighted-Average Grant Date Fair Value Per Share
RSUs outstanding at May 26, 20241,622,004 $7.83 
Granted651,630 4.83 
Vested(588,366)8.32 
Forfeited(183,994)7.03 
RSUs outstanding at November 24, 20241,501,274 6.43 
A summary of the Company’s PSU award activity as of November 24, 2024 and changes during the fiscal quarter then ended is presented below:
 Performance Share Units OutstandingWeighted-Average Grant Date Fair Value Per Share
PSUs outstanding at May 26, 20241,500,000 $4.66 
Granted750,000 3.36 
Vested(75,000)4.24 
Forfeited— — 
PSUs outstanding at November 24, 20242,175,000 4.23 
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs
The following table summarizes stock-based compensation by income statement line item:
Three Months EndedSix Months Ended
November 24, 2024November 26, 2023November 24, 2024November 26, 2023
Cost of product sales$105 $178 247 $362 
Research and development(135)42 (123)84 
Selling, general and administrative3,402 1,357 5,667 2,664 
Stock-based compensation expense3,372 1,577 5,791 3,110 
Amount capitalized into property, plant, and equipment— — 16 
Total stock-based compensation costs$3,372 $1,584 $5,791 $3,126