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Long-term Debt and Other Credit Arrangements - Additional Information (Detail) - USD ($)	12 Months Ended
	Apr. 30, 2022	Jun. 27, 2022	May 27, 2022	Apr. 29, 2022	Mar. 11, 2022	Jul. 30, 2021	Apr. 30, 2021	Feb. 01, 2020	Dec. 13, 2019	May 06, 2013
Debt Instrument [Line Items]
Loan agreement										$ 20,000,000
Collateralized debt instrument, borrowing capacity				$ 4,715,823	$ 7,500,000			$ 15,000,000	$ 20,000,000
Minimum monthly liquidity covenant requirement						$ 2,000,000
Minimum supplemental liquidity covenant requirement, through calendar year 2021						1,000,000
Minimum supplemental liquidity covenant requirement, thereafter calendar year 2021						$ 1,500,000
Cash collateral required, percentage of outstanding issued letters of credit				105.00%
Unused and available credit facility	$ 2,400,000
Subsequent Event
Debt Instrument [Line Items]
Collateralized debt instrument, borrowing capacity			$ 3,000,000
Long-term debt		$ 0
Expiration Date, Period One | Bank Guarantees
Debt Instrument [Line Items]
Bank Guarantees outstanding to customers	6,000,000.0						$ 6,000,000.0
Term Loan B | Expiration Date, Period One
Debt Instrument [Line Items]
Bank Guarantees outstanding to customers							3,200,000
Term Loan B | Expiration Date, Period Two
Debt Instrument [Line Items]
Bank Guarantees outstanding to customers	8,200,000						61,000
Term Loan B | Expiration Date, Period Three
Debt Instrument [Line Items]
Bank Guarantees outstanding to customers	111,000						18,000
Term Loan B | Expiration Date, Period Four
Debt Instrument [Line Items]
Bank Guarantees outstanding to customers	9,000						9,000
Term Loan B | Expiration Date, Period Five
Debt Instrument [Line Items]
Bank Guarantees outstanding to customers	3,000						257,000
Term Loan B | Expiration Date, Period Six
Debt Instrument [Line Items]
Bank Guarantees outstanding to customers	249,000
Advance Amount One
Debt Instrument [Line Items]
Credit facility outstanding	1,600,000						6,800,000
Advance Amount Two
Debt Instrument [Line Items]
Credit facility outstanding	$ 716,000						$ 704,000
Advances
Debt Instrument [Line Items]
Interest rate at period end	4.75%						4.75%
Line of Credit | Base Rate
Debt Instrument [Line Items]
Debt, variable interest rate	0.75%
Line of Credit | LIBOR
Debt Instrument [Line Items]
Debt, variable interest rate	4.00%

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- Definition

Cash Collateral Required, Percentage of Outstanding Issued Letters of Credit

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Debt Instrument, Asset Based Lending, Maximum Borrowing Capacity

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Minimum Supplemental Liquidity Covenant Requirement, Thereafter Calendar Year 2021

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Minimum Supplemental Liquidity Covenant Requirement, Through Calendar Year 2021

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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