| Date Filed | Type | Description |
| 04/17/2023 |
10-K
| Annual Report for the period ended January 31, 2023 |
| 05/26/2022 |
10-K/A
| Annual Report for the period ended January 31, 2022 [amend] |
| 04/08/2022 |
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 |
| 05/26/2020 |
10-K/A
| Annual Report for the period ended January 31, 2020 [amend] |
| 04/20/2020 |
10-K
| Annual Report for the period ended January 31, 2020 |
| 04/12/2019 |
10-K
| Annual Report for the period ended January 31, 2019 |
| 04/16/2018 |
10-K
| Annual Report for the period ended January 31, 2018 |
| 04/17/2017 |
10-K
| Annual Report for the period ended January 31, 2017 |
| 04/12/2016 |
10-K
| Annual Report for the period ended January 31, 2016 |
| 04/07/2015 |
10-K
| Annual Report for the period ended January 31, 2015 |
| 04/04/2014 |
10-K
| Annual Report for the period ended January 31, 2014 |
| 04/10/2013 |
10-K
| Annual Report for the period ended January 31, 2013 |
| 04/06/2012 |
10-K/A
| Annual Report for the period ended January 31, 2012 [amend] |
| 04/05/2012 |
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 |
| 06/01/2010 |
10-K/A
| Annual Report for the period ended January 31, 2010 [amend] |
| 04/09/2010 |
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 |
| 04/14/2008 |
10-K
| Annual Report for the period ended January 31, 2008 |
| 10/19/2007 |
10-K/A
| Annual Report for the period ended January 31, 2007 [amend] |
| 04/13/2007 |
10-K
| Annual Report for the period ended January 31, 2007 |
| 04/17/2006 |
10-K
| Annual Report for the period ended January 31, 2006 |
| 04/15/2005 |
10-K
| Annual Report for the period ended January 31, 2005 |
| 04/14/2004 |
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 |
| 05/03/2001 |
10-K/A
| Annual Report for the period ended December 31, 1999 [amend] |
| 04/30/2001 |
10-K
| Annual Report for the period ended January 31, 2001 |
| 03/01/2001 |
10-K/A
| Annual Report for the period ended December 31, 1999 [amend] |
| 04/14/2000 |
10-K/A
| Annual Report for the period ended December 31, 1999 [amend] |
| 03/30/2000 |
10-K
| Annual Report for the period ended December 31, 1999 |
| 03/24/1999 |
10-K
| Annual Report for the period ended December 31, 1998 |
| 03/31/1998 |
10-K
| Annual Report for the period ended December 31, 1997 |