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Stock-Based Compensation - Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Oct. 24, 2020 | Oct. 26, 2019 | Oct. 24, 2020 | Oct. 26, 2019
Stock-based compensation expense recognized for outstanding grants |  |  |  |
Equity-based awards expense | $ 4,120 | $ 3,032 | $ 6,167 | $ 4,707
Liability-based awards expense | 754 | 400 | 1,338 | 340
Total stock-based compensation expense | $ 4,874 | $ 3,432 | $ 7,505 | $ 5,047

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