| Date Filed | Type | Description |
| 02/23/2023 |
10-K
| Annual Report for the period ended December 31, 2022 |
| 02/23/2022 |
10-K
| Annual Report for the period ended December 31, 2021 |
| 02/22/2021 |
10-K
| Annual Report for the period ended December 31, 2020 |
| 02/20/2020 |
10-K
| Annual Report for the period ended December 31, 2019 |
| 03/12/2019 |
10-K
| Annual Report for the period ended December 31, 2018 |
| 02/20/2018 |
10-K
| Annual Report for the period ended December 31, 2017 |
| 02/15/2017 |
10-K
| Annual Report for the period ended December 31, 2016 |
| 02/19/2016 |
10-K
| Annual Report for the period ended December 31, 2015 |
| 02/17/2015 |
10-K
| Annual Report for the period ended December 31, 2014 |
| 02/18/2014 |
10-KT
| Form 10-KT - Transition reports [Rule 13a-10 or 15d-10] |
| 07/16/2013 |
10-K
| Annual Report for the period ended May 31, 2013 |
| 07/30/2012 |
10-K/A
| Annual Report for the period ended May 31, 2012 [amend] |
| 07/17/2012 |
10-K
| Annual Report for the period ended May 31, 2012 |
| 07/19/2011 |
10-K
| Annual Report for the period ended May 31, 2011 |
| 07/22/2010 |
10-K
| Annual Report for the period ended May 31, 2010 |
| 07/24/2009 |
10-K
| Annual Report for the period ended May 31, 2009 |
| 07/28/2008 |
10-K
| Annual Report for the period ended May 31, 2008 |
| 08/09/2007 |
10-K
| Annual Report for the period ended May 31, 2007 |
| 08/11/2006 |
10-K
| Annual Report for the period ended May 31, 2006 |
| 08/05/2005 |
10-K
| Annual Report for the period ended May 31, 2005 |