| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 Mar 2025 | 21 Mar 2025 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Apr 2024 | 30 Mar 2024 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 25 Mar 2024 | 21 Mar 2024 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Apr 2023 | 30 Mar 2023 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Apr 2022 | 31 Mar 2022 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 19 Jan 2022 | 13 Dec 2021 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 19 Apr 2021 | 15 Apr 2021 | 001-09518 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Apr 2021 | 01 Apr 2021 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 19 Jan 2021 | 15 Jan 2021 | 001-09518 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 19 Oct 2020 | 15 Oct 2020 | 001-09518 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Aug 2020 | 03 Aug 2020 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 29 Jul 2020 | 27 Jul 2020 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 Jul 2020 | 20 Jul 2020 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Jul 2020 | 15 Jul 2020 | 001-09518 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 Jul 2020 | 13 Jul 2020 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Jul 2020 | 10 Jul 2020 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 May 2020 | 11 May 2020 | 001-09518 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Apr 2020 | 15 Apr 2020 | 001-09518 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Apr 2020 | 02 Apr 2020 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 31 Mar 2020 | 28 Mar 2020 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 Jan 2020 | 15 Jan 2020 | 001-09518 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Oct 2019 | 15 Oct 2019 | 001-09518 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Jul 2019 | 15 Jul 2019 | 001-09518 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 May 2019 | 10 May 2019 | 001-09518 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 Apr 2019 | 15 Apr 2019 | 001-09518 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 15 Apr 2019 | 11 Apr 2019 | 001-09518 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Apr 2019 | 03 Apr 2019 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Apr 2019 | 28 Mar 2019 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 29 Mar 2019 | 27 Mar 2019 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 Mar 2019 | 20 Mar 2019 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 15 Mar 2019 | 13 Mar 2019 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 07 Mar 2019 | 06 Mar 2019 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 28 Feb 2019 | 27 Feb 2019 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 22 Feb 2019 | 20 Feb 2019 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Feb 2019 | 11 Feb 2019 | 001-09518 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 25 May 2018 | 23 May 2018 | 001-09518 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Apr 2018 | 12 Apr 2018 | 001-09518 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Apr 2018 | 03 Apr 2018 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 28 Mar 2018 | 26 Mar 2018 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 Mar 2018 | 21 Mar 2018 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Feb 2018 | 09 Feb 2018 | 001-09518 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 17 May 2017 | 17 May 2017 | 000-30941 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 May 2017 | 12 May 2017 | 001-09518 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Apr 2017 | 13 Apr 2017 | 001-09518 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 27 Mar 2017 | 23 Mar 2017 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 Mar 2017 | 21 Mar 2017 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 Feb 2017 | 10 Feb 2017 | 001-09518 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 May 2016 | 13 May 2016 | 001-09518 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 17 May 2016 | 16 May 2016 | 000-30941 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 Mar 2016 | 24 Mar 2016 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 22 Mar 2016 | 21 Mar 2016 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Feb 2016 | 12 Feb 2016 | 001-09518 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 16 Jul 2015 | 15 Jul 2015 | 000-30941 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 May 2015 | 15 May 2015 | 001-09518 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Apr 2015 | 16 Apr 2015 | 001-09518 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 30 Mar 2015 | 26 Mar 2015 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 25 Mar 2015 | 23 Mar 2015 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Feb 2015 | 13 Feb 2015 | 001-09518 |
| 4 | Open Document | Open Filing | NETTLES 2014 OPTION GRANT | 17 Jul 2014 | 15 Jul 2014 | 000-30941 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 19 May 2014 | 16 May 2014 | 001-09518 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Apr 2014 | 17 Apr 2014 | 001-09518 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 Apr 2014 | 10 Apr 2014 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 31 Mar 2014 | 21 Mar 2014 | 001-36250 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 11 Feb 2014 | 07 Feb 2014 | 001-09518 |
| 4 | Open Document | Open Filing | NETTLES 2013 OPTION GRANT | 16 Jul 2013 | 15 Jul 2013 | 000-30941 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 May 2013 | 17 May 2013 | 001-09518 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Apr 2013 | 15 Apr 2013 | 000-21969 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 26 Mar 2013 | 22 Mar 2013 | 000-21969 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 22 Mar 2013 | 20 Mar 2013 | 000-21969 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 Mar 2013 | 20 Mar 2013 | 001-09518 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Feb 2013 | 01 Feb 2013 | 001-09518 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 30 Nov 2012 | 29 Nov 2012 | 001-09518 |
| 4 | Open Document | Open Filing | NETTLES 2012 OPTION GRANT | 17 Jul 2012 | 16 Jul 2012 | 000-30941 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 Apr 2012 | 20 Apr 2012 | 001-09518 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Apr 2012 | 17 Apr 2012 | 000-21969 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 16 Apr 2012 | 27 Mar 2012 | 000-21969 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Apr 2012 | 29 Mar 2012 | 001-09518 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 28 Mar 2012 | 27 Mar 2012 | 000-21969 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 27 Mar 2012 | 26 Mar 2012 | 000-21969 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 Mar 2012 | 21 Mar 2012 | 000-21969 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 07 Feb 2012 | 03 Feb 2012 | 001-09518 |