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Income Taxes - Summary of Valuation Allowance by Jurisdiction (Details)
$ in Thousands
12 Months Ended
Apr. 25, 2020
USD ($)
Deferred Tax Asset Valuation Allowance [Roll Forward]  
Beginning of the period $ 2,312
Change (175)
End of the period 2,137
U.S. Federal  
Deferred Tax Asset Valuation Allowance [Roll Forward]  
Beginning of the period 586
Change 586
End of the period 1,172
U.S. State  
Deferred Tax Asset Valuation Allowance [Roll Forward]  
Beginning of the period 1,709
Change (761)
End of the period 948
Foreign  
Deferred Tax Asset Valuation Allowance [Roll Forward]  
Beginning of the period 17
Change 0
End of the period $ 17