| Date Filed | Type | Description |
| 03/16/2015 |
10-K
| Annual Report for the period ended December 31, 2014 |
| 03/14/2014 |
10-K
| Annual Report for the period ended December 31, 2013 |
| 03/14/2013 |
10-K
| Annual Report for the period ended December 31, 2012 |
| 03/14/2012 |
10-K
| Annual Report for the period ended December 31, 2011 |
| 04/08/2011 |
10-K
| Annual Report for the period ended January 31, 2011 |
| 04/09/2010 |
10-K
| Annual Report for the period ended January 31, 2010 |
| 04/13/2009 |
10-K
| Annual Report for the period ended January 31, 2009 |
| 04/01/2009 |
10-K/A
| Annual Report for the period ended January 31, 2008 [amend] |
| 04/14/2008 |
10-K
| Annual Report for the period ended January 31, 2008 |
| 05/17/2007 |
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 |
| 04/12/2006 |
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 |
| 04/30/2004 |
10-K
| Annual Report for the period ended January 31, 2004 |
| 05/01/2003 |
10-K
| Annual Report for the period ended January 31, 2003 |
| 05/01/2002 |
10-K
| Annual Report for the period ended January 31, 2002 |
| 05/01/2001 |
10-K
| Annual Report for the period ended January 31, 2001 |
| 05/09/2000 |
10-K/A
| Annual Report for the period ended January 31, 2000 [amend] |
| 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 |
| 04/29/1998 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 04/29/1997 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |