| Date Filed | Type | Description |
| 03/17/2017 |
10-K
| Annual Report for the period ended January 31, 2017 |
| 03/18/2016 |
10-K
| Annual Report for the period ended January 31, 2016 |
| 03/16/2015 |
10-K
| Annual Report for the period ended January 31, 2015 |
| 03/17/2014 |
10-K
| Annual Report for the period ended January 31, 2014 |
| 03/15/2013 |
10-K
| Annual Report for the period ended January 31, 2013 |
| 03/15/2012 |
10-K
| Annual Report for the period ended January 31, 2012 |
| 03/17/2011 |
10-K
| Annual Report for the period ended January 31, 2011 |
| 03/24/2010 |
10-K/A
| Annual Report for the period ended January 31, 2010 [amend] |
| 03/17/2010 |
10-K
| Annual Report for the period ended January 31, 2010 |
| 03/18/2009 |
10-K
| Annual Report for the period ended January 31, 2009 |
| 03/19/2008 |
10-K
| Annual Report for the period ended January 31, 2008 |
| 02/28/2007 |
10-K
| Annual Report for the period ended December 31, 2006 |
| 03/15/2006 |
10-K
| Annual Report for the period ended December 31, 2005 |
| 03/16/2005 |
10-K
| Annual Report for the period ended December 31, 2004 |
| 03/12/2004 |
10-K
| Annual Report for the period ended December 31, 2003 |
| 03/24/2003 |
10-K
| Annual Report for the period ended December 31, 2002 |
| 05/28/2002 |
10-K/A
| Annual Report for the period ended December 31, 2001 [amend] |
| 03/19/2002 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 03/27/2001 |
10-K
| Annual Report for the period ended December 31, 2000 |
| 03/29/2000 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 03/31/1999 |
10-K
| Annual Report for the period ended December 31, 1998 |
| 04/03/1998 |
10-K405/A
| Form 10-K405/A - Annual report [Sections 13 and 15(d), S-K Item 405] [Amend] |
| 03/31/1998 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 03/28/1997 |
10-K
| Annual Report for the period ended December 31, 1996 |
| 03/27/1996 |
10-K
| Annual Report for the period ended December 31, 1995 |
| 03/14/1996 |
10-K/A
| Annual Report for the period ended December 31, 1994 [amend] |
| 03/31/1995 |
10-K
| Annual Report for the period ended December 31, 1994 |
| 04/29/1994 |
10-K/A
| Annual Report for the period ended December 31, 1993 [amend] |
| 04/28/1994 |
10-K/A
| Annual Report for the period ended December 31, 1993 [amend] |
| 03/31/1994 |
10-K
| Annual Report for the period ended December 31, 1993 |