| Date Filed | Type | Description |
| 04/17/2023 |
10-K
| Annual Report for the period ended January 31, 2023 |
| 04/13/2022 |
10-K
| Annual Report for the period ended January 31, 2022 |
| 04/14/2021 |
10-K
| Annual Report for the period ended January 31, 2021 |
| 04/14/2020 |
10-K
| Annual Report for the period ended January 31, 2020 |
| 04/10/2019 |
10-K
| Annual Report for the period ended January 31, 2019 |
| 04/11/2018 |
10-K
| Annual Report for the period ended January 31, 2018 |
| 04/10/2017 |
10-K
| Annual Report for the period ended January 31, 2017 |
| 04/14/2016 |
10-K
| Annual Report for the period ended January 31, 2016 |
| 04/15/2015 |
10-K
| Annual Report for the period ended January 31, 2015 |
| 09/18/2014 |
10-K/A
| Annual Report for the period ended January 31, 2014 [amend] |
| 04/23/2014 |
10-K/A
| Annual Report for the period ended January 31, 2014 [amend] |
| 04/14/2014 |
10-K
| Annual Report for the period ended January 31, 2014 |
| 04/12/2013 |
10-K
| Annual Report for the period ended January 31, 2013 |
| 04/12/2012 |
10-K
| Annual Report for the period ended January 31, 2012 |
| 04/14/2011 |
10-K
| Annual Report for the period ended January 31, 2011 |
| 04/14/2010 |
10-K
| Annual Report for the period ended January 31, 2010 |
| 05/05/2009 |
10-K/A
| Annual Report for the period ended January 31, 2009 [amend] |
| 04/14/2009 |
10-K
| Annual Report for the period ended January 31, 2009 |
| 04/24/2008 |
10-K
| Annual Report for the period ended January 31, 2008 |
| 06/13/1997 |
10-K405/A
| Form 10-K405/A - Annual report [Sections 13 and 15(d), S-K Item 405] [Amend] |
| 04/30/1997 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 02/27/1997 |
10-K405/A
| Form 10-K405/A - Annual report [Sections 13 and 15(d), S-K Item 405] [Amend] |
| 04/30/1996 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |