| Date Filed | Type | Description |
| 04/13/2021 |
10-K
| Annual Report for the period ended January 31, 2021 |
| 04/13/2020 |
10-K
| Annual Report for the period ended January 31, 2020 |
| 04/16/2019 |
10-K
| Annual Report for the period ended January 31, 2019 |
| 04/13/2018 |
10-K
| Annual Report for the period ended January 31, 2018 |
| 06/30/2017 |
10-K/A
| Annual Report for the period ended January 31, 2017 [amend] |
| 04/07/2017 |
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 |
| 04/10/2015 |
10-K
| Annual Report for the period ended January 31, 2015 |
| 04/11/2014 |
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 |
| 04/04/2012 |
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 |
| 04/15/2010 |
10-K
| Annual Report for the period ended January 31, 2010 |
| 04/14/2009 |
10-K
| Annual Report for the period ended January 31, 2009 |
| 04/15/2008 |
10-K
| Annual Report for the period ended January 31, 2008 |
| 04/16/2007 |
10-K
| Annual Report for the period ended January 31, 2007 |
| 04/14/2006 |
10-K
| Annual Report for the period ended January 31, 2006 |
| 04/18/2005 |
10-K
| Annual Report for the period ended January 31, 2005 |
| 04/15/2004 |
10-K
| Annual Report for the period ended January 31, 2004 |
| 04/30/2003 |
10-K
| Annual Report for the period ended January 31, 2003 |
| 04/30/2002 |
10-K
| Annual Report for the period ended January 31, 2002 |
| 04/27/2001 |
10-K
| Annual Report for the period ended January 31, 2001 |
| 04/28/2000 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 04/30/1999 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 05/19/1998 |
10-K405/A
| Form 10-K405/A - Annual report [Sections 13 and 15(d), S-K Item 405] [Amend] |
| 04/29/1998 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |