Leases - Additional Information (Details)		12 Months Ended
	Aug. 24, 2020 USD ($) Installment	Apr. 30, 2022 USD ($)	Apr. 30, 2021 USD ($)
Lessee Lease Description [Line Items]
Operating lease cost		$ 3,900,000	$ 3,100,000
Short-term operating lease costs		$ 218,000	263,000
Operating lease, weighted average lease term		16 years 1 month 6 days
Operating lease, weighted average discount rate		5.40%
Operating right-of-use lease asset		$ 23,884,000	25,375,000
Operating lease, liability		24,879,000
Cash paid for amounts included in measurement of liabilities and operating cash flows		$ 1,800,000	1,500,000
Corporate Headquarters
Lessee Lease Description [Line Items]
Operating sublease, term of contract	18 years
Percentage of fair market value of subleased building space	90.00%
Operating right-of-use lease asset	$ 24,500,000
Operating lease, liability	$ 24,500,000
Operating lease, effective interest rate	5.40%
Number of monthly installments | Installment	216
Office Space
Lessee Lease Description [Line Items]
Reduction of Right-Of-Use asset			640,000
Reduction of lease liability			640,000
Office Space | Bentonville, Arkansas
Lessee Lease Description [Line Items]
Reduction of Right-Of-Use asset			240,000
Reduction of lease liability			240,000
Administrative Office Space
Lessee Lease Description [Line Items]
Operating right-of-use lease asset			369,000
Operating lease, liability			$ 369,000