| As Of | Filing | | Doc. | | Page | | Title | Docs. |
|---|
| | |  |
| 3/27/24 | | DEF 14A | | | | 1 | | Advisory Vote on Approval of Executive Compensation as Disclosed in This Proxy Statement | 1 |
| 7/31/23 | | DEF 14A | | | | 1 | | Appendix A -- Text of Amendment to Articles of Incorporation to Increase Authorized Shares | 2 |
| | | | | | 1 | | Authorized Share Proposal | 2 |
| 7/31/23 | | 10-K | | | | 1 | | Business | 1 |
| 9/21/23 | | S-3/A | | | | 1 | | Capitalization | 3 |
| 3/27/24 | | DEF 14A | | | | 1 | | Certain Relationships and Related Person Transactions | 1 |
| 7/31/23 | | 10-K | | | | 1 | | Certain Relationships and Related Transactions, and Director Independence | 1 |
| | | | | | 1 | | Changes in and Disagreements With Accountants on Accounting and Financial Disclosures | 1 |
| 3/27/24 | | DEF 14A | | | | 1 | | Code of Conduct and Ethics | 1 |
| 3/18/24 | | 10-Q | | | | 1 | | Condensed Consolidated Balance Sheets as of January 31, 2024 and April 30, 2023 (Unaudited) | 1 |
| 9/18/23 | | 10-Q | | | | 1 | | Condensed Consolidated Balance Sheets as of July 31, 2023, and April 30, 2023 (Unaudited) | 1 |
| 12/15/23 | | 10-Q | | | | 1 | | Condensed Consolidated Balance Sheets as of October 31, 2023 and April 30, 2023 (Unaudited) | 1 |
| 3/18/24 | | 10-Q | | | | 1 | | Condensed Consolidated Financial Statements (Unaudited) | 3 |
| | | | | | 1 | | Condensed Consolidated Statements of Cash Flows for the Nine Months Ended January 31, 2024 and 2023 (Unaudited) | 1 |
| 12/15/23 | | 10-Q | | | | 1 | | Condensed Consolidated Statements of Cash Flows for the Six Months Ended October 31, 2023 and 2022 (Unaudited) | 1 |
| 9/18/23 | | 10-Q | | | | 1 | | Condensed Consolidated Statements of Cash Flows for the Three Months Ended July 31, 2023, and 2022 (Unaudited) | 1 |
| 12/15/23 | | 10-Q | | | | 1 | | Condensed Consolidated Statements of Comprehensive Income (Loss) for the Three and Six Months Ended October 31, 2023 and 2022 (Unaudited) | 1 |
| 3/18/24 | | 10-Q | | | | 1 | | Condensed Consolidated Statements of Comprehensive Loss for the Three and Nine Months Ended January 31, 2024 and 2023 (Unaudited) | 1 |
| 9/18/23 | | 10-Q | | | | 1 | | Condensed Consolidated Statements of Comprehensive Loss for the Three Months Ended July 31, 2023, and 2022 (Unaudited) | 1 |
| 3/18/24 | | 10-Q | | | | 1 | | Condensed Consolidated Statements of Convertible Preferred Stock and Stockholders' Equity for the Nine Months Ended January 31, 2024 and 2023 (Unaudited) | 1 |
| 12/15/23 | | 10-Q | | | | 1 | | Condensed Consolidated Statements of Convertible Preferred Stock and Stockholders' Equity for the Six Months Ended October 31, 2023 and 2022 (Unaudited) | 1 |
| 9/18/23 | | 10-Q | | | | 1 | | Condensed Consolidated Statements of Convertible Preferred Stock and Stockholders' Equity for the Three Months Ended July 31, 2023, and 2022 (Unaudited) | 1 |
| 3/18/24 | | 10-Q | | | | 1 | | Condensed Consolidated Statements of Operations for the Three and Nine Months Ended January 31, 2024 and 2023 (Unaudited) | 1 |
| 12/15/23 | | 10-Q | | | | 1 | | Condensed Consolidated Statements of Operations for the Three and Six Months Ended October 31, 2023 and 2022 (Unaudited) | 1 |
| 9/18/23 | | 10-Q | | | | 1 | | Condensed Consolidated Statements of Operations for the Three Months Ended July 31, 2023, and 2022 (Unaudited) | 1 |
| 7/31/23 | | 10-K | | | | 1 | | Consolidated Balance Sheets as of April 30, 2023, and 2022 | 1 |
| | | | | | 1 | | Consolidated Statements of Cash Flows for the Years Ended April 30, 2023, and 2022 | 1 |
| | | | | | 1 | | Consolidated Statements of Comprehensive Loss for the Years Ended April 30, 2023, and 2023 | 1 |
| | | | | | 1 | | Consolidated Statements of Operations for the Years Ended April 30, 2023, and 2022 | 1 |
| | | | | | 1 | | Consolidated Statements of Stockholders' Equity for the Years Ended April 30, 2023, and 2022 | 1 |
| 3/18/24 | | 10-Q | | | | 1 | | Controls and Procedures | 4 |
| | | | | | 1 | | Defaults Upon Senior Securities | 3 |
| 7/31/23 | | 10-K | | | | 1 | | Directors, Executive Officers and Corporate Governance | 1 |
| | | | | | 1 | | Disclosure Regarding Foreign Jurisdictions That Prevent Inspections | 1 |
| 3/27/24 | | DEF 14A | | | | 1 | | Election of Directors | 1 |
| | | | | | 1 | | Equity Compensation Plan Information | 1 |
| 7/31/23 | | 10-K | | | | 1 | | Executive Compensation | 1 |
| 3/27/24 | | DEF 14A | | | | 1 | | Executive Officer and Director Compensation | 1 |
| 3/18/24 | | 10-Q | | | | 1 | | Exhibits | 4 |
| 9/21/23 | | S-3/A | | | | 1 | | Experts | 4 |
| 3/18/24 | | 10-Q | | | | 1 | | Financial Information | 3 |
| 7/31/23 | | 10-K | | | | 1 | | Financial Statement Schedule II -- Valuation and Qualifying Accounts | 1 |
| | | | | | 1 | | Financial Statements and Supplementary Data | 1 |
| | | | | | 1 | | Form 10-K Summary | 1 |
| 3/27/24 | | DEF 14A | | | | 1 | | Important Information About the Annual Meeting and Voting | 1 |
| 7/31/23 | | DEF 14A | | | | 1 | | Important Information About the Special Meeting and Voting | 4 |
| 9/21/23 | | S-3/A | | | | 1 | | Information Incorporated by Reference | 4 |
| 7/31/23 | | DEF 14A | | | | 1 | | Issuance Proposal | 4 |
| 9/21/23 | | S-3/A | | | | 1 | | Legal Matters | 4 |
| 3/18/24 | | 10-Q | | | | 1 | | Legal Proceedings | 4 |
| 3/27/24 | | DEF 14A | | | | 1 | | Management and Corporate Governance | 1 |
| 3/18/24 | | 10-Q | | | | 1 | | Management's Discussion and Analysis of Financial Condition and Results of Operations | 4 |
| 7/31/23 | | 10-K | | | | 1 | | Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities | 1 |
| 3/18/24 | | 10-Q | | | | 1 | | Mine Safety Disclosures | 4 |
| | | | | | 1 | | Notes to Condensed Consolidated Financial Statements (Unaudited) | 3 |
| 7/31/23 | | 10-K | | | | 1 | | Notes to Consolidated Financial Statements | 1 |
| 9/21/23 | | S-3/A | | | | 1 | | Offering, The | 4 |
| 3/18/24 | | 10-Q | | | | 1 | | Other Information | 4 |
| 3/27/24 | | DEF 14A | | | | 1 | | Other Matters | 5 |
| | | | | | 1 | | Pay Versus Performance | 1 |
| 9/21/23 | | S-3/A | | | | 1 | | Plan of Distribution | 4 |
| | | | | | 1 | | Powers of Attorney | 4 |
| 7/31/23 | | 10-K | | | | 1 | | Principal Accountant Fees and Services | 1 |
| | | | | | 1 | | Properties | 1 |
| 3/27/24 | | DEF 14A | | | | 1 | | Proposal No. 1 -- Election of Directors | 1 |
| 7/31/23 | | DEF 14A | | | | 1 | | Proposal No. 1 -- Issuance Proposal | 2 |
| | | | | | 1 | | Proposal No. 2 -- Authorized Share Proposal | 2 |
| 3/27/24 | | DEF 14A | | | | 1 | | Proposal No. 2 -- Ratification of Selection of Independent Registered Public Accounting Firm | 1 |
| | | | | | 1 | | Proposal No. 3 -- Advisory Vote on Approval of Executive Compensation as Disclosed in This Proxy Statement | 1 |
| 9/21/23 | | S-3/A | | | | 1 | | Prospectus Summary | 4 |
| 3/18/24 | | 10-Q | | | | 1 | | Quantitative and Qualitative Disclosures About Market Risk | 4 |
| 3/27/24 | | DEF 14A | | | | 1 | | Ratification of Selection of Independent Registered Public Accounting Firm | 1 |
| 7/31/23 | | 10-K | | | | 1 | | Recommendation must also be accompanied by the following information concerning the proposed nominee, The | 1 |
| 3/27/24 | | DEF 14A | | | | 1 | | Report of Audit Committee | 1 |
| 7/31/23 | | 10-K | | | | 1 | | Report of Independent Registered Public Accounting Firm | 1 |
| | | | | | 1 | | Reserved | 1 |
| 3/18/24 | | 10-Q | | | | 1 | | Risk Factors | 8 |
| 3/27/24 | | DEF 14A | | | | 1 | | Security Ownership of Certain Beneficial Owners and Management | 5 |
| 7/31/23 | | 10-K | | | | 1 | | Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters | 1 |
| 9/21/23 | | S-3/A | | | | 1 | | Selling Stockholders | 4 |
| 3/18/24 | | 10-Q | | | | 1 | | Signatures | 3 |
| 9/21/23 | | S-3/A | | | | 1 | | Special Note Regarding Forward-Looking Statements | 4 |
| 3/27/24 | | DEF 14A | | | | 1 | | Stockholder Proposals and Nominations for Director | 5 |
| | | | | | 1 | | Table of Contents | 8 |
| 7/31/23 | | DEF 14A | | | | 1 | | Text of Amendment to Articles of Incorporation to Increase Authorized Shares | 2 |
| 9/21/23 | | S-3/A | | | | 1 | | The Offering | 4 |
| 7/31/23 | | 10-K | | | | 1 | | The recommendation must also be accompanied by the following information concerning the proposed nominee | 1 |
| 3/18/24 | | 10-Q | | | | 1 | | Unregistered Sales of Equity Securities and Use of Proceeds | 3 |
| 7/31/23 | | 10-K | | | | 1 | | Unresolved Staff Comments | 1 |
| 9/21/23 | | S-3/A | | | | 1 | | Use of Proceeds | 4 |
| 7/31/23 | | 10-K | | | | 1 | | Valuation and Qualifying Accounts | 1 |
| 9/21/23 | | S-3/A | | | | 1 | | Where You Can Find Additional Information | 4 |
| | | | | | 1 | | 24.1 | 4 |
