| Date Filed | Type | Description |
| 06/16/2023 |
10-K
| Annual Report for the period ended April 30, 2023 |
| 06/17/2022 |
10-K
| Annual Report for the period ended April 30, 2022 |
| 06/21/2021 |
10-K
| Annual Report for the period ended April 30, 2021 |
| 06/22/2020 |
10-K/A
| Annual Report for the period ended April 30, 2020 [amend] |
| 06/19/2020 |
10-K
| Annual Report for the period ended April 30, 2020 |
| 06/13/2019 |
10-K
| Annual Report for the period ended April 30, 2019 |
| 06/13/2018 |
10-K
| Annual Report for the period ended April 30, 2018 |
| 06/14/2017 |
10-K
| Annual Report for the period ended April 30, 2017 |
| 06/15/2016 |
10-K
| Annual Report for the period ended April 30, 2016 |
| 06/17/2015 |
10-K
| Annual Report for the period ended April 30, 2015 |
| 06/19/2014 |
10-K
| Annual Report for the period ended April 30, 2014 |
| 06/27/2013 |
10-K
| Annual Report for the period ended April 30, 2013 |
| 06/27/2012 |
10-K
| Annual Report for the period ended April 30, 2012 |
| 06/27/2011 |
10-K
| Annual Report for the period ended April 30, 2011 |
| 06/25/2010 |
10-K
| Annual Report for the period ended April 30, 2010 |
| 06/26/2009 |
10-K
| Annual Report for the period ended April 30, 2009 |
| 06/27/2008 |
10-K
| Annual Report for the period ended April 30, 2008 |
| 06/27/2008 |
AR
| 2008 Annual Report |
| 06/28/2007 |
10-K
| Annual Report for the period ended April 30, 2007 |
| 06/28/2007 |
AR
| 2007 Annual Report |
| 06/28/2007 |
AR
| 2007 Annual Report (Spanish) |
| 06/29/2006 |
10-K
| Annual Report for the period ended April 30, 2006 |
| 06/30/2005 |
10-K
| Annual Report for the period ended April 30, 2005 |
| 06/30/2005 |
AR
| 2005 Annual Report |
| 07/02/2004 |
10-K
| Annual Report for the period ended April 30, 2004 |
| 07/02/2004 |
AR
| 2004 Annual Report |
| 07/24/2003 |
10-K
| Annual Report for the period ended April 30, 2003 |
| 07/24/2003 |
AR
| 2003 Annual Report |
| 07/26/2002 |
10-K
| Annual Report for the period ended April 30, 2002 |
| 07/26/2002 |
AR
| 2002 Annual Report |
| 07/27/2001 |
AR
| 2001 Annual Report |
| 07/27/2001 |
AR
| 2001 Annual Report (Insert) |
| 07/27/2001 |
10-K
| Annual Report for the period ended April 30, 2001 |
| 07/25/2000 |
10-K
| Annual Report for the period ended April 30, 2000 |
|