| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 10-Q | Open Document | Data | Open Filing | 10-Q | Sep 19, 2025 | Jul 31, 2025 | 000-09483 |
| NT 10-Q | Open Document | Open Filing | NT 10-Q | Sep 15, 2025 | Jul 31, 2025 | 000-09483 |
| 10-K | Open Document | Data | Open Filing | 10-K | Aug 13, 2025 | Apr 30, 2025 | 000-09483 |
| NT 10-K | Open Document | Open Filing | NT 10-K | Jul 30, 2025 | Apr 30, 2025 | 000-09483 |
| 10-Q | Open Document | Data | Open Filing | Mar 25, 2025 | Jan 31, 2025 | 000-09483 | |
| NT 10-Q | Open Document | Open Filing | Mar 17, 2025 | Jan 31, 2025 | 000-09483 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 24, 2025 | Feb 20, 2025 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 12, 2025 | Feb 11, 2025 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 7, 2025 | Feb 5, 2025 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 7, 2025 | Feb 5, 2025 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 7, 2025 | Feb 5, 2025 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 7, 2025 | Feb 5, 2025 | |
| 8-K | Open Document | Data | Open Filing | Feb 7, 2025 | Feb 5, 2025 | 000-09483 | |
| 10-Q | Open Document | Data | Open Filing | Dec 23, 2024 | Oct 31, 2024 | 000-09483 | |
| NT 10-Q | Open Document | Open Filing | Dec 16, 2024 | Oct 31, 2024 | 000-09483 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 3, 2024 | Oct 2, 2024 | |
| 10-Q | Open Document | Data | Open Filing | Sep 23, 2024 | Jul 31, 2024 | 000-09483 | |
| NT 10-Q | Open Document | Open Filing | Sep 16, 2024 | Jul 31, 2024 | 000-09483 | |
| 10-K | Open Document | Data | Open Filing | Aug 14, 2024 | Apr 30, 2024 | 000-09483 | |
| NT 10-K | Open Document | Open Filing | Jul 29, 2024 | Apr 30, 2024 | 000-09483 | |
| 10-Q/A | Open Document | Data | Open Filing | Jun 14, 2024 | Jan 31, 2024 | 000-09483 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 16, 2024 | May 15, 2024 | |
| 10-Q | Open Document | Data | Open Filing | Mar 25, 2024 | Jan 31, 2024 | 000-09483 | |
| NT 10-Q | Open Document | Open Filing | Mar 18, 2024 | Jan 31, 2024 | 000-09483 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 23, 2024 | Feb 21, 2024 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 23, 2024 | Feb 21, 2024 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 23, 2024 | Feb 21, 2024 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 23, 2024 | Feb 21, 2024 | |
| 8-K | Open Document | Data | Open Filing | Feb 23, 2024 | Feb 21, 2024 | 000-09483 | |
| 10-Q | Open Document | Data | Open Filing | Dec 20, 2023 | Oct 31, 2023 | 000-09483 | |
| NT 10-Q | Open Document | Open Filing | Dec 15, 2023 | Oct 31, 2023 | 000-09483 | |
| 10-Q/A | Open Document | Data | Open Filing | Sep 26, 2023 | Jul 31, 2023 | 000-09483 | |
| 10-Q | Open Document | Data | Open Filing | Sep 19, 2023 | Jul 31, 2023 | 000-09483 | |
| NT 10-Q | Open Document | Open Filing | Sep 18, 2023 | Jul 31, 2023 | 000-09483 | |
| 10-K | Open Document | Data | Open Filing | Aug 18, 2023 | Apr 30, 2023 | 000-09483 | |
| NT 10-K | Open Document | Open Filing | Jul 31, 2023 | Apr 30, 2023 | 000-09483 | |
| 8-K/A | Open Document | Data | Open Filing | Jul 13, 2023 | Dec 5, 2022 | 000-09483 | |
| 10-Q/A | Open Document | Data | Open Filing | Mar 27, 2023 | Jan 31, 2023 | 000-09483 | |
| 10-Q | Open Document | Open Filing | Mar 22, 2023 | Jan 31, 2023 | 000-09483 | |
| NT 10-Q | Open Document | Open Filing | Mar 17, 2023 | Jan 31, 2023 | 000-09483 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 10, 2023 | Feb 8, 2023 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 10, 2023 | Feb 8, 2023 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 10, 2023 | Feb 8, 2023 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 10, 2023 | Feb 8, 2023 | |
| 8-K | Open Document | Data | Open Filing | Feb 10, 2023 | Feb 8, 2023 | 000-09483 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 7, 2023 | Feb 2, 2023 | |
| 8-K | Open Document | Data | Open Filing | Jan 3, 2023 | Dec 5, 2022 | 000-09483 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 23, 2022 | Dec 22, 2022 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 23, 2022 | Dec 22, 2022 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 23, 2022 | Dec 22, 2022 | |
| 8-K | Open Document | Data | Open Filing | Dec 23, 2022 | Dec 22, 2022 | 000-09483 | |
| 10-Q/A | Open Document | Data | Open Filing | Dec 22, 2022 | Oct 31, 2022 | 000-09483 | |
| 10-Q | Open Document | Open Filing | Dec 20, 2022 | Oct 31, 2022 | 000-09483 | |
| NT 10-Q | Open Document | Open Filing | Dec 16, 2022 | Oct 31, 2022 | 000-09483 | |
| 10-Q | Open Document | Data | Open Filing | Sep 19, 2022 | Jul 31, 2022 | 000-09483 | |
| NT 10-Q | Open Document | Open Filing | Sep 14, 2022 | Jul 31, 2022 | 000-09483 | |
| 10-K | Open Document | Data | Open Filing | Aug 15, 2022 | Apr 30, 2022 | 000-09483 | |
| NT 10-K | Open Document | Open Filing | Jul 29, 2022 | Apr 30, 2022 | 000-09483 | |
| 10-Q | Open Document | Data | Open Filing | Mar 17, 2022 | Jan 31, 2022 | 000-09483 | |
| 8-K | Open Document | Data | Open Filing | Jan 7, 2022 | Jan 3, 2022 | 000-09483 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 5, 2022 | Jan 3, 2022 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 5, 2022 | Jan 3, 2022 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 5, 2022 | Jan 3, 2022 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 5, 2022 | Jan 3, 2022 | |
| 10-Q | Open Document | Data | Open Filing | Dec 15, 2021 | Oct 31, 2021 | 000-09483 | |
| 10-Q | Open Document | Data | Open Filing | Sep 20, 2021 | Jul 31, 2021 | 000-09483 | |
| NT 10-Q | Open Document | Open Filing | Sep 15, 2021 | Jul 31, 2021 | 000-09483 | |
| 10-K | Open Document | Data | Open Filing | Aug 16, 2021 | Apr 30, 2021 | 000-09483 | |
| NT 10-K | Open Document | Open Filing | Aug 2, 2021 | Apr 30, 2021 | 000-09483 | |
| 10-Q | Open Document | Data | Open Filing | Mar 22, 2021 | Jan 31, 2021 | 000-09483 | |
| NT 10-Q | Open Document | Open Filing | Mar 17, 2021 | Jan 31, 2021 | 000-09483 | |
| 8-K | Open Document | Open Filing | Dec 30, 2020 | Dec 30, 2020 | 000-09483 | |
| 10-Q | Open Document | Data | Open Filing | Dec 21, 2020 | Oct 31, 2020 | 000-09483 | |
| NT 10-Q | Open Document | Open Filing | Dec 15, 2020 | Oct 31, 2020 | 000-09483 | |
| 10-Q | Open Document | Data | Open Filing | Sep 21, 2020 | Jul 31, 2020 | 000-09483 | |
| NT 10-Q | Open Document | Open Filing | Sep 14, 2020 | Jul 31, 2020 | 000-09483 | |
| 10-K | Open Document | Data | Open Filing | Aug 13, 2020 | Apr 30, 2020 | 000-09483 | |
| NT 10-K | Open Document | Open Filing | Jul 29, 2020 | Apr 30, 2020 | 000-09483 | |
| 8-K | Open Document | Open Filing | Jul 27, 2020 | Jun 22, 2020 | 000-09483 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 24, 2020 | Jul 22, 2020 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 24, 2020 | Jul 22, 2020 | |
| 8-K | Open Document | Open Filing | Jul 14, 2020 | Apr 30, 2020 | 000-09483 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 13, 2020 | Jul 9, 2020 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 13, 2020 | Jul 9, 2020 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 13, 2020 | Jul 9, 2020 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 13, 2020 | Jul 9, 2020 | |
| DEF 14C | Open Document | Open Filing | Jul 9, 2020 | Jul 9, 2020 | 000-09483 | |
| 10-Q | Open Document | Data | Open Filing | Jul 9, 2020 | Jan 31, 2020 | 000-09483 | |
| 10-Q | Open Document | Data | Open Filing | Jul 9, 2020 | Oct 31, 2019 | 000-09483 | |
| 10-Q | Open Document | Data | Open Filing | Jul 9, 2020 | Jul 31, 2019 | 000-09483 | |
| 10-K | Open Document | Data | Open Filing | Jul 9, 2020 | Apr 30, 2019 | 000-09483 | |
| 10-Q | Open Document | Data | Open Filing | Jul 9, 2020 | Jan 31, 2019 | 000-09483 | |
| 10-Q | Open Document | Data | Open Filing | Jul 9, 2020 | Oct 31, 2018 | 000-09483 | |
| 10-Q | Open Document | Data | Open Filing | Jul 9, 2020 | Jul 31, 2018 | 000-09483 | |
| 10-K | Open Document | Data | Open Filing | Jul 9, 2020 | Apr 30, 2018 | 000-09483 | |
| 10-Q | Open Document | Data | Open Filing | Jul 9, 2020 | Jan 31, 2018 | 000-09483 | |
| 10-Q | Open Document | Data | Open Filing | Jul 9, 2020 | Oct 31, 2017 | 000-09483 | |
| 10-Q | Open Document | Data | Open Filing | Jul 9, 2020 | Jul 31, 2017 | 000-09483 | |
| 10-K | Open Document | Data | Open Filing | Jul 9, 2020 | Apr 30, 2017 | 000-09483 | |
| 10-Q | Open Document | Data | Open Filing | Jul 9, 2020 | Jan 31, 2017 | 000-09483 | |
| 10-Q | Open Document | Data | Open Filing | Jul 9, 2020 | Oct 31, 2016 | 000-09483 | |
| 8-K | Open Document | Open Filing | FORM 8-K | Oct 31, 2018 | Oct 31, 2018 | 000-09483 |
| 8-K | Open Document | Open Filing | FORM 8-K | Aug 14, 2018 | Aug 9, 2018 | 000-09483 |
| 8-K | Open Document | Open Filing | 8-K | Aug 21, 2017 | Aug 17, 2017 | 000-09483 |
| 8-K | Open Document | Open Filing | 8-K | Feb 28, 2017 | Feb 22, 2017 | 000-09483 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 19, 2017 | Jan 18, 2017 | |
| NT 10-Q | Open Document | Open Filing | NT 10-Q | Dec 15, 2016 | Oct 31, 2016 | 000-09483 |
| 10-Q | Open Document | Data | Open Filing | 10-Q | Sep 19, 2016 | Jul 31, 2016 | 000-09483 |
| NT 10-Q | Open Document | Open Filing | NT 10-Q | Sep 15, 2016 | Jul 31, 2016 | 000-09483 |
| 10-K | Open Document | Data | Open Filing | 10-K | Aug 26, 2016 | Apr 30, 2016 | 000-09483 |
| NT 10-K | Open Document | Open Filing | NT 10-K | Jul 29, 2016 | Apr 30, 2016 | 000-09483 |
| 10-Q | Open Document | Data | Open Filing | 10-Q | Mar 21, 2016 | Jan 31, 2016 | 000-09483 |
| NT 10-Q | Open Document | Open Filing | NT 10-Q | Mar 16, 2016 | Jan 31, 2016 | 000-09483 |
| 8-K | Open Document | Open Filing | 8-K | Feb 19, 2016 | Feb 12, 2016 | 000-09483 |
| 8-K | Open Document | Open Filing | 8-K | Feb 4, 2016 | Jan 31, 2016 | 000-09483 |
| 8-K | Open Document | Open Filing | 8-K | Dec 22, 2015 | Dec 22, 2015 | 000-09483 |
| 10-Q | Open Document | Data | Open Filing | 10-Q | Dec 21, 2015 | Oct 31, 2015 | 000-09483 |
| NT 10-Q | Open Document | Open Filing | NT 10-Q | Dec 15, 2015 | Oct 31, 2015 | 000-09483 |
| 10-Q/A | Open Document | Data | Open Filing | 10-Q/A | Sep 22, 2015 | Jul 31, 2015 | 000-09483 |
| 10-Q | Open Document | Data | Open Filing | 10-Q | Sep 21, 2015 | Jul 31, 2015 | 000-09483 |
| NT 10-Q | Open Document | Open Filing | NT 10-Q | Sep 14, 2015 | Jul 31, 2015 | 000-09483 |
| 10-K | Open Document | Data | Open Filing | 10-K | Aug 13, 2015 | Apr 30, 2015 | 000-09483 |
| NT 10-K | Open Document | Open Filing | NT 10-K | Jul 29, 2015 | Apr 30, 2015 | 000-09483 |
| 8-K | Open Document | Open Filing | 8-K | Jun 8, 2015 | Jun 5, 2015 | 000-09483 |
| 10-Q | Open Document | Data | Open Filing | 10-Q | Mar 23, 2015 | Jan 31, 2015 | 000-09483 |
| NT 10-Q | Open Document | Open Filing | NT 10-Q | Mar 17, 2015 | Jan 31, 2015 | 000-09483 |
| 10-Q | Open Document | Data | Open Filing | 10-Q | Dec 22, 2014 | Oct 31, 2014 | 000-09483 |
| NT 10-Q | Open Document | Open Filing | NT 10-Q | Dec 15, 2014 | Oct 31, 2014 | 000-09483 |
| S-8 | Open Document | Open Filing | S-8 | Nov 3, 2014 | 333-199822 | |
| 10-Q | Open Document | Data | Open Filing | 10-Q | Sep 22, 2014 | Jul 31, 2014 | 000-09483 |
| NT 10-Q | Open Document | Open Filing | NT 10-Q | Sep 15, 2014 | Jul 31, 2014 | 000-09483 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 25, 2014 | Aug 22, 2014 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 25, 2014 | Aug 22, 2014 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 25, 2014 | Aug 22, 2014 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 25, 2014 | Aug 22, 2014 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 25, 2014 | Aug 22, 2014 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 25, 2014 | Aug 22, 2014 | |
| 10-K | Open Document | Data | Open Filing | 10-K | Aug 13, 2014 | Apr 30, 2014 | 000-09483 |
| NT 10-K | Open Document | Open Filing | NT 10-K | Jul 29, 2014 | Apr 30, 2014 | 000-09483 |
| 10-Q | Open Document | Data | Open Filing | 10-Q | Mar 24, 2014 | Jan 31, 2014 | 000-09483 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 21, 2014 | Mar 19, 2014 | |
| NT 10-Q | Open Document | Open Filing | NT 10-Q | Mar 17, 2014 | Jan 31, 2014 | 000-09483 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 21, 2014 | Jan 21, 2014 |