Significant Accounting Policies (Policies)	9 Months Ended
Significant Accounting Policies (Policies)	Jan. 31, 2022
Accounting Policies [Abstract]
Basis of Presentation	Basis of PresentationThe accompanying unaudited condensed consolidated financial statements are presented in accordance with the rules and regulations of the U.S. Securities and Exchange Commission (the “SEC”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) have been condensed or omitted as permitted by the SEC. These unaudited condensed consolidated financial statements and related notes should be read in conjunction with the audited consolidated financial statements and related notes as of and for the years ended April 30, 2021 and 2020 included in the Company’s final prospectus dated January 26, 2022 (the “Prospectus”) as filed with the SEC on January 27, 2022 pursuant to Rule 424(b) under the Securities Act of 1933, as amended (the “Securities Act”). The unaudited condensed consolidated financial statements include all adjustments, including normal recurring adjustments and other adjustments, that are considered necessary for fair presentation of the Company’s financial position and results of operations. All inter-company accounts and transactions have been eliminated. Operating results for the periods presented herein are not necessarily indicative of the results that may be expected for the entire year.
Use of Estimates	Use of Estimates The preparation of these condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the Company’s condensed consolidated financial statements and accompanying notes. The Company bases its estimates and judgments on historical experience, knowledge of current conditions and beliefs of what could occur in the future, given the available information. Estimates are used for, but not limited to, write-down for excess and obsolete inventories, asset lives for property and equipment, accrued liabilities, allowance for doubtful accounts, the standalone selling price for each distinct performance obligation included in customer contracts with multiple performance obligations, variable consideration from revenue contracts, incremental borrowing rate used in the Company’s operating lease calculations, determination of the fair value of share-based awards, valuation of ordinary shares, and the realization of tax assets and estimates of tax reserves. Actual results may differ from those estimates and such differences may be material to the financial statements. In the current macroeconomic environment affected by COVID-19, these estimates require increased judgment and carry a higher degree of variability and volatility. As events continue to evolve and additional information becomes available, these estimates may change materially in future periods.
Reclassifications	Reclassifications Certain prior period balances were reclassified to conform to the current period’s presentation. None of these reclassifications had an impact on reported net income or cash flows for any of the periods presented.
Deferred Offering Costs	Deferred Offering Costs The Company capitalized certain legal, accounting and other third-party fees that were directly associated with in-process equity financings as deferred offering costs until such financings were consummated. Upon completion of the IPO, $5.3 million of such costs were recorded as a reduction of the proceeds generated from the offering which were recognized in additional paid-in capital. As of January 31, 2022, there were no deferred offering costs. As of April 30, 2021, the deferred offering costs recorded as other long-term assets on the condensed consolidated balance sheet were not material.
Amazon Warrant	Amazon Warrant The Company accounts for the warrant issued to Amazon.com NV Investment Holdings LLC as an equity instrument, based on the specific terms of the warrant agreement. When management determines that it is probable that a tranche of the warrant will vest and we recognize the related revenue, the grant date fair value of the associated tranche will be recognized in shareholders’ equity and the underlying expense will be amortized as a reduction of revenue in proportion to the amount of related revenue recognized.
Accounting Pronouncement Recently Adopted and Recent Accounting Pronouncements Not Yet Adopted	Accounting Pronouncement Recently Adopted In February 2016, the FASB issued Accounting Standards Update (“ASU”) 2016-02, Leases (Topic 842), which requires lessees to record most leases on their balance sheets and to disclose key information about lease arrangements. In July 2018, the FASB issued ASU 2018-10, Codification Improvements to Topic 842, Leases. The ASU makes 16 technical corrections to the new lease standard and other accounting topics, alleviating unintended consequences from applying the new standard. It does not make any substantive changes to the core provisions or principles of the new standard. In July 2018, the FASB also issued ASU 2018-11, Leases (Topic 842): Targeted Improvements. The ASU provides (1) an optional transition method that entities can use when adopting the standard and (2) a practical expedient that permits lessors to not separate non-lease components from the associated lease component if certain conditions are met. In March 2019, the FASB also issued ASU 2019-01, Leases (Topic 842): Codification Improvements, which impacts transition disclosures related to the new guidance. The Company adopted the new lease accounting standard on May 1, 2021, using the modified retrospective approach by applying the new standard to leases existing at the date of initial application and not restating comparative periods. See “Note 9 - Leases” for additional information. In August 2018, the FASB issued ASU 2018-15, Intangibles—Goodwill and Other—Internal-Use Software, which aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The new guidance is effective for the Company for its fiscal year beginning May 1, 2021 and interim periods within its fiscal year beginning May 1, 2022. The Company adopted this guidance on May 1, 2021 prospectively, and the impact on its consolidated financial statements was not material. Recent Accounting Pronouncements Not Yet Adopted In June 2016, the FASB issued ASU 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which requires a financial asset measured at amortized cost basis to be presented at the net amount expected to be collected, with further clarifications made more recently. For trade receivables, loans and other financial instruments, the Company will be required to use a forward-looking expected loss model rather than the incurred loss model for recognizing credit losses which reflects losses that are probable. Credit losses relating to available-for-sale debt securities are required to be recorded through an allowance for credit losses rather than as a reduction in the amortized cost basis of the securities. This guidance is effective for the Company for its fiscal year beginning May 1, 2023 and interim periods within its fiscal year beginning May 1, 2024. The Company is currently evaluating the impact of the adoption of this guidance on its consolidated financial statements. In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes, which simplifies the accounting for income taxes by eliminating some exceptions to the general approach in Topic 740 in order to reduce cost and complexity of its application. This new guidance is effective for the Company for its fiscal year beginning May 1, 2022 and interim periods within its fiscal year beginning May 1, 2023. Early adoption is permitted. The Company is currently evaluating the impact of the adoption of this guidance on its consolidated financial statements.