| Date Filed | Type | Description |
| 05/31/2017 |
10-K/A
| Annual Report for the period ended January 31, 2017 [amend] |
| 04/28/2017 |
10-K
| Annual Report for the period ended January 31, 2017 |
| 05/27/2016 |
10-K/A
| Annual Report for the period ended January 31, 2016 [amend] |
| 04/29/2016 |
10-K
| Annual Report for the period ended January 31, 2016 |
| 06/01/2015 |
10-K/A
| Annual Report for the period ended January 31, 2015 [amend] |
| 04/30/2015 |
10-K
| Annual Report for the period ended January 31, 2015 |
| 06/13/2014 |
10-K/A
| Annual Report for the period ended January 31, 2014 [amend] |
| 04/30/2014 |
10-K
| Annual Report for the period ended January 31, 2014 |
| 05/31/2013 |
10-K/A
| Annual Report for the period ended January 31, 2013 [amend] |
| 04/30/2013 |
10-K
| Annual Report for the period ended January 31, 2013 |
| 04/30/2012 |
10-K
| Annual Report for the period ended January 31, 2012 |
| 04/29/2011 |
10-K
| Annual Report for the period ended January 31, 2011 |
| 05/03/2010 |
10-K
| Annual Report for the period ended January 31, 2010 |
| 06/01/2009 |
10-K/A
| Annual Report for the period ended January 31, 2009 [amend] |
| 05/01/2009 |
10-K
| Annual Report for the period ended January 31, 2009 |
| 04/30/2008 |
10-K
| Annual Report for the period ended January 31, 2008 |
| 04/30/2007 |
10-K
| Annual Report for the period ended January 31, 2007 |
| 05/01/2006 |
10-K
| Annual Report for the period ended January 31, 2006 |
| 05/11/2005 |
10-K
| Annual Report for the period ended January 31, 2005 |
| 04/11/2005 |
10-K/A
| Annual Report for the period ended January 31, 2004 [amend] |
| 05/17/2004 |
10-K
| Annual Report for the period ended January 31, 2004 |
| 05/17/2004 |
AR
| 2003 Annual Report |
| 05/01/2003 |
10-K
| Annual Report for the period ended January 31, 2003 |
| 05/01/2003 |
AR
| 2002 Annual Report |
| 05/01/2002 |
10-K
| Annual Report for the period ended January 31, 2002 |
| 05/01/2002 |
AR
| 2001 Annual Report |
| 05/01/2001 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 04/28/2000 |
10-K
| Annual Report for the period ended January 31, 2000 |
| 04/30/1999 |
10-K
| Annual Report for the period ended January 31, 1999 |
| 05/01/1998 |
10-K
| Annual Report for the period ended January 31, 1998 |
| 04/30/1997 |
10-K
| Annual Report for the period ended January 31, 1997 |
| 04/29/1996 |
10-K
| Annual Report for the period ended January 31, 1996 |