| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) | 
|---|---|---|---|---|---|---|
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Nov 17, 2023 | Sep 30, 2023 | 000-31981 | 
| NT 10-Q | Open Document | Open Filing | NT 10-Q | Nov 14, 2023 | Sep 30, 2023 | 000-31981 | 
| 8-K | Open Document | Data | Open Filing | FORM 8-K | Sep 12, 2023 | Sep 7, 2023 | 000-31981 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Aug 14, 2023 | Jun 30, 2023 | 000-31981 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | May 15, 2023 | Mar 31, 2023 | 000-31981 | 
| 10-K | Open Document | Data | Open Filing | FORM 10-K | Apr 17, 2023 | Dec 31, 2022 | 000-31981 | 
| NT 10-K | Open Document | Open Filing | NT 10-K | Mar 31, 2023 | Dec 31, 2022 | 000-31981 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Nov 14, 2022 | Sep 30, 2022 | 000-31981 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Aug 12, 2022 | Jun 30, 2022 | 000-31981 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | May 23, 2022 | Mar 31, 2022 | 000-31981 | 
| NT 10-Q | Open Document | Open Filing | NT 10-Q | May 16, 2022 | Mar 31, 2022 | 000-31981 | 
| 10-K | Open Document | Data | Open Filing | FORM 10-K | Mar 31, 2022 | Dec 31, 2021 | 000-31981 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Nov 15, 2021 | Sep 30, 2021 | 000-31981 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Aug 16, 2021 | Jun 30, 2021 | 000-31981 | 
| 4 | Open Document | Open Filing | Jul 7, 2021 | Jul 3, 2021 | ||
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 7, 2021 | Jul 3, 2021 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 7, 2021 | Jul 3, 2021 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 7, 2021 | Jul 3, 2021 | |
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | May 24, 2021 | Mar 31, 2021 | 000-31981 | 
| NT 10-Q | Open Document | Open Filing | NT 10-Q | May 17, 2021 | Mar 31, 2021 | 000-31981 | 
| 10-K | Open Document | Data | Open Filing | FORM 10-K | Mar 31, 2021 | Dec 31, 2020 | 000-31981 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Nov 13, 2020 | Sep 30, 2020 | 000-31981 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Aug 14, 2020 | Jun 30, 2020 | 000-31981 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Jun 29, 2020 | Mar 31, 2020 | 000-31981 | 
| 8-K | Open Document | Open Filing | FORM 8-K | May 15, 2020 | May 15, 2020 | 000-31981 | 
| 10-K | Open Document | Data | Open Filing | FORM 10-K | May 14, 2020 | Dec 31, 2019 | 000-31981 | 
| 8-K | Open Document | Open Filing | FORM 8-K | Mar 30, 2020 | Mar 30, 2020 | 000-31981 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Nov 14, 2019 | Sep 30, 2019 | 000-31981 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Aug 14, 2019 | Jun 30, 2019 | 000-31981 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | May 15, 2019 | Mar 31, 2019 | 000-31981 | 
| 10-K | Open Document | Data | Open Filing | FORM 10-K | Mar 29, 2019 | Dec 31, 2018 | 000-31981 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 22, 2019 | Sep 28, 2018 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 22, 2019 | Sep 28, 2018 | |
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Nov 14, 2018 | Sep 30, 2018 | 000-31981 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Aug 16, 2018 | Jun 30, 2018 | 000-31981 | 
| NT 10-Q | Open Document | Open Filing | NT 10-Q | Aug 14, 2018 | Jun 30, 2018 | 000-31981 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | May 25, 2018 | Mar 31, 2018 | 000-31981 | 
| NT 10-Q | Open Document | Open Filing | NT 10-Q | May 14, 2018 | Mar 31, 2018 | 000-31981 | 
| 10-K | Open Document | Data | Open Filing | FORM 10-K | Apr 17, 2018 | Dec 31, 2017 | 000-31981 | 
| NT 10-K | Open Document | Open Filing | NT 10-K | Apr 2, 2018 | Dec 31, 2017 | 000-31981 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Feb 2, 2018 | Jan 31, 2018 | |
| 8-K | Open Document | Open Filing | FORM 8-K | Feb 1, 2018 | Jan 30, 2018 | 000-31981 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Nov 20, 2017 | Sep 30, 2017 | 000-31981 | 
| NT 10-Q | Open Document | Open Filing | NT 10-Q | Nov 14, 2017 | Sep 30, 2017 | 000-31981 | 
| 8-K | Open Document | Open Filing | FORM 8-K | Nov 6, 2017 | Nov 2, 2017 | 000-31981 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Aug 21, 2017 | Jun 30, 2017 | 000-31981 | 
| D | Open Document | Open Filing | Aug 14, 2017 | 021-292754 | ||
| NT 10-Q | Open Document | Open Filing | NT 10-Q | Aug 14, 2017 | Jun 30, 2017 | 000-31981 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | May 15, 2017 | Mar 31, 2017 | 000-31981 | 
| 10-K | Open Document | Data | Open Filing | FORM 10-K | Apr 17, 2017 | Dec 31, 2016 | 000-31981 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 17, 2017 | Nov 8, 2016 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 13, 2017 | Nov 8, 2016 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 13, 2017 | Nov 8, 2016 | |
| NT 10-K | Open Document | Open Filing | NT 10-K | Mar 31, 2017 | Dec 31, 2016 | 000-31981 | 
| 8-K | Open Document | Open Filing | FORM 8-K | Jan 25, 2017 | Jan 20, 2017 | 000-31981 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Nov 21, 2016 | Sep 30, 2016 | 000-31981 | 
| NT 10-Q | Open Document | Open Filing | NT 10-Q | Nov 14, 2016 | Sep 30, 2016 | 000-31981 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 22, 2016 | Aug 2, 2016 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 16, 2016 | Aug 2, 2016 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 16, 2016 | Aug 2, 2016 | |
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Aug 16, 2016 | Jun 30, 2016 | 000-31981 | 
| NT 10-Q | Open Document | Open Filing | NT 10-Q | Aug 15, 2016 | Jun 30, 2016 | 000-31981 | 
| 8-K | Open Document | Open Filing | FORM 8-K | Jul 22, 2016 | Jul 20, 2016 | 000-31981 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | May 19, 2016 | Mar 31, 2016 | 000-31981 | 
| NT 10-Q | Open Document | Open Filing | NT 10-Q | May 16, 2016 | Mar 31, 2016 | 000-31981 | 
| 10-K | Open Document | Data | Open Filing | FORM 10-K | May 9, 2016 | Dec 31, 2015 | 000-31981 | 
| NT 10-K | Open Document | Open Filing | NT 10-K | Mar 30, 2016 | Dec 31, 2015 | 000-31981 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Nov 16, 2015 | Sep 30, 2015 | 000-31981 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Aug 18, 2015 | Jun 30, 2015 | 000-31981 | 
| NT 10-Q | Open Document | Open Filing | NT 10-Q | Aug 14, 2015 | Jun 30, 2015 | 000-31981 | 
| 8-K | Open Document | Open Filing | FORM 8-K | Jul 2, 2015 | Jun 30, 2015 | 000-31981 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | May 20, 2015 | Mar 31, 2015 | 000-31981 | 
| NT 10-Q | Open Document | Open Filing | NT 10-Q | May 14, 2015 | Mar 31, 2015 | 000-31981 | 
| 10-K | Open Document | Data | Open Filing | FORM 10-K | Apr 15, 2015 | Dec 31, 2014 | 000-31981 | 
| NT 10-K | Open Document | Open Filing | NT 10-K | Mar 31, 2015 | Dec 31, 2014 | 000-31981 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Nov 14, 2014 | Sep 30, 2014 | 000-31981 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 3, 2014 | Oct 1, 2014 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 3, 2014 | Oct 1, 2014 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 3, 2014 | Oct 1, 2014 | |
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Aug 13, 2014 | Jun 30, 2014 | 000-31981 | 
| D | Open Document | Open Filing | Jul 25, 2014 | 021-221794 | ||
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | May 19, 2014 | Mar 31, 2014 | 000-31981 | 
| NT 10-Q | Open Document | Open Filing | NT 10-Q | May 14, 2014 | Mar 31, 2014 | 000-31981 | 
| 10-K | Open Document | Data | Open Filing | FORM 10-K | Apr 15, 2014 | Dec 31, 2013 | 000-31981 | 
| 4 | Open Document | Open Filing | Apr 15, 2014 | Feb 1, 2013 | ||
| NT 10-K | Open Document | Open Filing | NT 10-K | Mar 31, 2014 | Dec 31, 2013 | 000-31981 |