| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 09 Jun 2023 | 07 Jun 2023 | 000-18655 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 08 May 2023 | 04 May 2023 | 000-15867 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 10 Aug 2022 | 08 Aug 2022 | 000-15867 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Jun 2022 | 02 Jun 2022 | 000-18655 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Jun 2022 | 01 Jun 2022 | 000-18655 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 09 May 2022 | 05 May 2022 | 000-15867 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Jun 2021 | 02 Jun 2021 | 000-18655 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 01 Mar 2021 | 25 Feb 2021 | 000-15867 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 06 Jan 2021 | 04 Jan 2021 | 000-15867 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 29 May 2020 | 27 May 2020 | 000-18655 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 19 Feb 2020 | 14 Feb 2020 | 000-15867 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 10 Jan 2020 | 09 Jan 2020 | 000-15867 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 21 Jun 2019 | 19 Jun 2019 | 000-15867 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Jun 2019 | 30 May 2019 | 000-18655 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 30 May 2019 | 29 May 2019 | 000-18655 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 26 Feb 2019 | 22 Feb 2019 | 000-15867 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 06 Feb 2019 | 04 Feb 2019 | 000-15867 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 23 Jul 2018 | 19 Jul 2018 | 001-34636 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Jun 2018 | 30 May 2018 | 000-18655 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 23 May 2018 | 21 May 2018 | 001-34636 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 17 May 2018 | 15 May 2018 | 001-34636 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 09 Feb 2018 | 07 Feb 2018 | 000-15867 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 10 Jan 2018 | 08 Jan 2018 | 000-15867 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Jun 2017 | 31 May 2017 | 000-18655 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 25 May 2017 | 24 May 2017 | 001-34636 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 25 May 2017 | 23 May 2017 | 000-15867 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 23 May 2017 | 21 May 2017 | 001-34636 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 17 May 2017 | 15 May 2017 | 001-34636 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 01 Mar 2017 | 01 Mar 2017 | 001-34636 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 22 Feb 2017 | 21 Feb 2017 | 000-15867 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Feb 2017 | 30 Dec 2016 | 000-18655 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 27 May 2016 | 25 May 2016 | 000-18655 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 24 May 2016 | 21 May 2016 | 001-34636 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 24 May 2016 | 20 May 2016 | 000-15867 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 19 May 2016 | 18 May 2016 | 001-34636 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 17 May 2016 | 15 May 2016 | 001-34636 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Feb 2016 | 01 Jan 2016 | 000-18655 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 09 Feb 2016 | 08 Feb 2016 | 000-15867 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 29 Sep 2015 | 25 Sep 2015 | 000-15867 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 24 Sep 2015 | 23 Sep 2015 | 000-15867 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Jun 2015 | 28 May 2015 | 000-18655 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 27 May 2015 | 27 May 2015 | 000-18655 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 26 May 2015 | 21 May 2015 | 001-34636 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 21 May 2015 | 20 May 2015 | 001-34636 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 19 May 2015 | 16 May 2015 | 001-34636 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 25 Feb 2015 | 24 Feb 2015 | 001-34636 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Feb 2015 | 02 Jan 2015 | 000-18655 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 10 Feb 2015 | 09 Feb 2015 | 000-15867 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Jun 2014 | 11 Jun 2014 | 000-15867 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Jun 2014 | 28 May 2014 | 000-18655 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 23 May 2014 | 21 May 2014 | 001-34636 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 20 May 2014 | 16 May 2014 | 001-34636 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 27 Feb 2014 | 27 Feb 2014 | 000-15867 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 Feb 2014 | 03 Jan 2014 | 000-18655 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 07 Feb 2014 | 04 Feb 2014 | 000-15867 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 02 Dec 2013 | 02 Dec 2013 | 001-34636 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Jun 2013 | 29 May 2013 | 000-18655 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 31 May 2013 | 29 May 2013 | 000-18655 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 23 May 2013 | 22 May 2013 | 001-34636 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 20 May 2013 | 16 May 2013 | 001-34636 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 26 Feb 2013 | 22 Feb 2013 | 001-34636 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Feb 2013 | 11 Feb 2013 | 000-15867 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 Aug 2012 | 17 Aug 2012 | 000-15867 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Jun 2012 | 30 May 2012 | 000-18655 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 18 May 2012 | 16 May 2012 | 001-34636 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Apr 2012 | 02 Apr 2012 | 001-10606 |