| Date Filed | Type | Description |
| 03/02/2023 |
10-K
| Annual Report for the period ended December 31, 2022 |
| 01/25/2022 |
10-K
| Annual Report for the period ended December 31, 2021 |
| 03/02/2021 |
10-KT
| Form 10-KT - Transition reports [Rule 13a-10 or 15d-10]: |
| 08/24/2020 |
10-K
| Annual Report for the period ended May 31, 2020 |
| 08/29/2019 |
10-K
| Annual Report for the period ended May 31, 2019 |
| 08/29/2018 |
10-K
| Annual Report for the period ended May 31, 2018 |
| 08/29/2017 |
10-K
| Annual Report for the period ended May 31, 2017 |
| 08/29/2016 |
10-K
| Annual Report for the period ended May 31, 2016 |
| 08/31/2015 |
10-K
| Annual Report for the period ended May 31, 2015 |
| 08/19/2014 |
10-K
| Annual Report for the period ended May 31, 2014 |
| 08/22/2013 |
10-K
| Annual Report for the period ended May 31, 2013 |
| 08/29/2012 |
10-K
| Annual Report for the period ended May 31, 2012 |
| 08/29/2011 |
10-K
| Annual Report for the period ended May 31, 2011 |
| 08/16/2010 |
10-K
| Annual Report for the period ended May 31, 2010 |
| 08/14/2009 |
10-K
| Annual Report for the period ended May 31, 2009 |
| 08/14/2008 |
10-K
| Annual Report for the period ended May 31, 2008 |
| 08/14/2007 |
10-K
| Annual Report for the period ended May 31, 2007 |
| 08/29/2003 |
10-K
| Annual Report for the period ended May 31, 2003 |
| 08/28/2002 |
10-K
| Annual Report for the period ended May 31, 2002 |