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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 + References No definition available. + Details
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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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