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Long-term Debt and Other Credit Arrangements - Additional Information (Detail) - USD ($) | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Apr. 30, 2021 | Apr. 27, 2021 | Apr. 30, 2020 | Feb. 01, 2020 | Dec. 13, 2019 | May 06, 2013
Debt Instrument [Line Items] |  |  |  |  |  |
Loan agreement |  |  |  |  |  | $ 20,000,000
Collateralized debt instrument, borrowing capacity |  |  |  | $ 15,000,000 | $ 20,000,000 |
Minimum EBITDA covenant requirement for year end FY21 | $ 1,000,000 |  |  |  |  |
EBIDTA increase by scheduled one-time non-recurring addbacks threshold amount |  | $ 250,000 |  |  |  |
EBITDA increase by solely for the fourth-quarter period ending April 30, 2021 one-time addback threshold amount |  | $ 600,000 |  |  |  |
Unused and available credit facility | 7,500,000 |  |  |  |  |
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 A |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Credit facility outstanding |  |  |  |  |  | 3,450,000
Term Loan B |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Credit facility outstanding |  |  |  |  |  | $ 1,550,000
Term Loan B | Expiration Date, Period One |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Bank Guarantees outstanding to customers |  |  | 1,600,000 |  |  |
Term Loan B | Expiration Date, Period Two |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Bank Guarantees outstanding to customers | 3,200,000 |  | 297,000 |  |  |
Term Loan B | Expiration Date, Period Three |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Bank Guarantees outstanding to customers | 61,000 |  | 74,000 |  |  |
Term Loan B | Expiration Date, Period Four |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Bank Guarantees outstanding to customers | 18,000 |  |  |  |  |
Term Loan B | Expiration Date, Period Five |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Bank Guarantees outstanding to customers | 9,000 |  |  |  |  |
Term Loan B | Expiration Date, Period Six |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Bank Guarantees outstanding to customers | 257,000 |  |  |  |  |
Advance Amount One |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Credit facility outstanding | 6,800,000 |  | 4,700,000 |  |  |
Advance Amount Two |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Credit facility outstanding | $ 704,000 |  | $ 512,000 |  |  |
Advances |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate at period end | 4.75% |  | 4.13% |  |  |
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 Debt Instrument, Asset Based Lending, Maximum Borrowing Capacity + References No definition available. + Details
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- Definition Minimum EBITDA covenant requirement for year end FY21 + References No definition available. + Details
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- Definition Minimum EBITDA Covenant Requirement, Revision, EBITDA Increase By Scheduled One-Time Non-Recurring Addbacks Threshold Amount + References No definition available. + Details
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- Definition Minimum EBITDA Covenant Requirement, Revision, EBITDA Increase By Solely Fourth-Quarter Period One-Time Addback Threshold Amount + References No definition available. + Details
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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121555522&loc=d3e12069-110248 + 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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