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Stock-Based Compensation - Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Jan. 23, 2021 | Jan. 25, 2020 | Jan. 23, 2021 | Jan. 25, 2020
Stock-based compensation expense recognized for outstanding grants |  |  |  |
Equity-based awards expense | $ 2,948 | $ 2,528 | $ 9,115 | $ 7,235
Liability-based awards expense | 587 | (303) | 1,925 | 37
Total stock-based compensation expense | $ 3,535 | $ 2,225 | $ 11,040 | $ 7,272

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