| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) | 
|---|---|---|---|---|---|---|
| NT 10-K | Open Document | Open Filing | FORM NT 10-K | Apr 1, 2024 | Dec 31, 2023 | 000-53557 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 31, 2024 | Jan 24, 2024 | |
| 10-Q/A | Open Document | Data | Open Filing | FORM 10-Q/A | Dec 29, 2023 | Sep 30, 2023 | 000-53557 | 
| 10-Q/A | Open Document | Data | Open Filing | FORM 10-Q/A | Dec 29, 2023 | Jun 30, 2023 | 000-53557 | 
| 8-K | Open Document | Data | Open Filing | FORM 8-K | Dec 28, 2023 | Dec 28, 2023 | 000-53557 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Nov 20, 2023 | Sep 30, 2023 | 000-53557 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 14, 2023 | Sep 20, 2023 | |
| NT 10-Q | Open Document | Open Filing | FORM NT 10-Q | Nov 14, 2023 | Sep 30, 2023 | 000-53557 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Aug 21, 2023 | Jun 30, 2023 | 000-53557 | 
| NT 10-Q | Open Document | Open Filing | FORM NT 10-Q | Aug 14, 2023 | Jun 30, 2023 | 000-53557 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | May 15, 2023 | Mar 31, 2023 | 000-53557 | 
| 8-K | Open Document | Data | Open Filing | FORM 8-K | May 8, 2023 | May 2, 2023 | 000-53557 | 
| 10-K | Open Document | Data | Open Filing | FORM 10-K | Apr 17, 2023 | Dec 31, 2022 | 000-53557 | 
| NT 10-K | Open Document | Open Filing | FORM NT 10-K | Mar 31, 2023 | Dec 31, 2022 | 000-53557 | 
| 8-K | Open Document | Data | Open Filing | FORM 8-K | Jan 12, 2023 | Jan 9, 2023 | 000-53557 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Nov 17, 2022 | Sep 30, 2022 | 000-53557 | 
| NT 10-Q | Open Document | Open Filing | FORM NT 10-Q | Nov 14, 2022 | Sep 30, 2022 | 000-53557 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Aug 15, 2022 | Jun 30, 2022 | 000-53557 | 
| SC 13D | Open Document | Open Filing | SCHEDULE 13D | May 26, 2022 | 005-87100 | |
| DEF 14A | Open Document | Open Filing | FORM DEF 14A | May 20, 2022 | Jun 15, 2022 | 000-53557 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | May 16, 2022 | Mar 31, 2022 | 000-53557 | 
| PRE 14A | Open Document | Open Filing | FORM PRE 14A | May 10, 2022 | May 10, 2022 | 000-53557 | 
| 10-K | Open Document | Data | Open Filing | FORM 10-K | Apr 15, 2022 | Dec 31, 2021 | 000-53557 | 
| NT 10-K | Open Document | Open Filing | FORM NT 10-K | Mar 31, 2022 | Dec 31, 2021 | 000-53557 | 
| 8-K | Open Document | Data | Open Filing | FORM 8-K | Jan 11, 2022 | Jan 11, 2022 | 000-53557 | 
| DEF 14A | Open Document | Open Filing | FORM DEF 14A | Nov 18, 2021 | Dec 28, 2021 | 000-53557 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Nov 12, 2021 | Sep 30, 2021 | 000-53557 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Aug 16, 2021 | Jun 30, 2021 | 000-53557 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | May 11, 2021 | Mar 31, 2021 | 000-53557 | 
| 10-K | Open Document | Data | Open Filing | FORM 10-K | Mar 30, 2021 | Dec 31, 2020 | 000-53557 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Nov 16, 2020 | Sep 30, 2020 | 000-53557 | 
| 4 | Open Document | Open Filing | Nov 16, 2020 | Nov 16, 2020 | ||
| 4 | Open Document | Open Filing | Aug 14, 2020 | Aug 12, 2020 | ||
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Aug 14, 2020 | Jun 30, 2020 | 000-53557 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | May 14, 2020 | Mar 31, 2020 | 000-53557 | 
| DEF 14A | Open Document | Open Filing | FORM DEF 14A | Mar 11, 2020 | Apr 30, 2020 | 000-53557 | 
| 10-K | Open Document | Data | Open Filing | FORM 10-K | Mar 10, 2020 | Dec 31, 2019 | 000-53557 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Nov 12, 2019 | Sep 30, 2019 | 000-53557 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Aug 12, 2019 | Jun 30, 2019 | 000-53557 | 
| 4 | Open Document | Open Filing | Aug 12, 2019 | Aug 10, 2019 | ||
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | May 10, 2019 | Mar 31, 2019 | 000-53557 | 
| 10-K | Open Document | Data | Open Filing | FORM 10-K | Mar 8, 2019 | Dec 31, 2018 | 000-53557 | 
| DEF 14A | Open Document | Open Filing | FORM DEF 14A | Mar 8, 2019 | Apr 30, 2019 | 000-53557 | 
| 4 | Open Document | Open Filing | Mar 7, 2019 | Mar 6, 2019 | ||
| SC 13G/A | Open Document | Open Filing | NONE | Dec 6, 2018 | 005-87100 | |
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Nov 13, 2018 | Sep 30, 2018 | 000-53557 | 
| 4 | Open Document | Open Filing | Oct 17, 2018 | Jan 12, 2018 | ||
| 8-K | Open Document | Open Filing | FORM 8-K | Sep 21, 2018 | Sep 21, 2018 | 000-53557 | 
| 10-Q | Open Document | Data | Open Filing | FORM 10-Q | Aug 10, 2018 | Jun 30, 2018 | 000-53557 | 
| 4 | Open Document | Open Filing | Aug 10, 2018 | May 17, 2018 | ||
| 10-Q | Open Document | Data | Open Filing | 10-Q | May 1, 2018 | Mar 31, 2018 | 000-53557 | 
| DEF 14A | Open Document | Open Filing | DEF 14A | Mar 19, 2018 | Apr 30, 2018 | 000-53557 | 
| 10-K | Open Document | Data | Open Filing | 10-K | Mar 16, 2018 | Dec 31, 2017 | 000-53557 | 
| SC 13G/A | Open Document | Open Filing | Feb 14, 2018 | 005-87100 | ||
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Nov 9, 2017 | May 19, 2017 | |
| 10-Q | Open Document | Data | Open Filing | 10-Q | Nov 9, 2017 | Sep 30, 2017 | 000-53557 | 
| 10-Q | Open Document | Data | Open Filing | 10-Q | Aug 11, 2017 | Jun 30, 2017 | 000-53557 | 
| SC 13G | Open Document | Open Filing | SC 13G | Jul 10, 2017 | 005-87100 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 24, 2017 | May 19, 2017 | |
| 10-Q | Open Document | Data | Open Filing | 10-Q | May 11, 2017 | Mar 31, 2017 | 000-53557 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 17, 2017 | Jan 3, 2017 | |
| 10-K | Open Document | Data | Open Filing | 10-K | Apr 17, 2017 | Dec 31, 2016 | 000-53557 | 
| NT 10-K | Open Document | Open Filing | NT 10-K | Mar 31, 2017 | Dec 31, 2016 | 000-53557 | 
| SC 13G | Open Document | Open Filing | Mar 21, 2017 | 005-87100 | ||
| 10-Q | Open Document | Data | Open Filing | 10-Q | Nov 14, 2016 | Sep 30, 2016 | 000-53557 | 
| DEF 14A | Open Document | Open Filing | DEF 14A | Aug 26, 2016 | Oct 5, 2016 | 000-53557 | 
| 10-Q | Open Document | Data | Open Filing | 10-Q | Jul 29, 2016 | Jun 30, 2016 | 000-53557 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jul 28, 2016 | Jun 16, 2016 | |
| 10-Q | Open Document | Data | Open Filing | 10-Q | Jun 16, 2016 | Mar 31, 2016 | 000-53557 | 
| 10-K | Open Document | Data | Open Filing | 10-K | Jun 6, 2016 | Dec 31, 2015 | 000-53557 | 
| NTN 10Q | Open Document | Open Filing | NT 10-Q | May 18, 2016 | Mar 31, 2016 | 000-53557 | 
| NTN 10K | Open Document | Open Filing | NT 10-K | Apr 7, 2016 | Dec 31, 2015 | 000-53557 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Feb 8, 2016 | Jan 29, 2016 | |
| 8-K | Open Document | Open Filing | 8-K | Feb 8, 2016 | Feb 8, 2016 | 000-53557 | 
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 4, 2016 | Nov 17, 2015 | |
| 10-Q | Open Document | Data | Open Filing | 10-Q | Jan 27, 2016 | Sep 30, 2015 | 000-53557 | 
| 10-Q | Open Document | Data | Open Filing | 10-Q | Jan 27, 2016 | Jun 30, 2015 | 000-53557 | 
| 10-Q | Open Document | Data | Open Filing | 10-Q | Jan 27, 2016 | Mar 31, 2015 | 000-53557 | 
| 8-K | Open Document | Open Filing | 8-K | Nov 27, 2015 | Nov 25, 2015 | 000-53557 | 
| 10-K | Open Document | Data | Open Filing | 10-K | Oct 27, 2015 | Dec 31, 2014 | 000-53557 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Oct 27, 2015 | Aug 4, 2015 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Oct 27, 2015 | Aug 7, 2015 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Oct 27, 2015 | Aug 5, 2015 | |
| 8-K | Open Document | Open Filing | 8-K | Oct 13, 2015 | Oct 13, 2015 | 000-53557 | 
| 8-K | Open Document | Open Filing | 8-K | Sep 2, 2015 | Sep 2, 2015 | 000-53557 | 
| 8-K | Open Document | Open Filing | 8-K | Jun 8, 2015 | Jun 8, 2015 | 000-53557 | 
| 8-K | Open Document | Open Filing | 8-K | May 26, 2015 | May 26, 2015 | 000-53557 | 
| NT 10-Q | Open Document | Open Filing | NT 10-Q | May 18, 2015 | Mar 31, 2015 | 000-53557 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 18, 2015 | Apr 27, 2015 | |
| 8-K | Open Document | Open Filing | 8-K | May 14, 2015 | May 14, 2015 | 000-53557 | 
| NT 10-K | Open Document | Open Filing | NT 10-K | Apr 1, 2015 | Dec 31, 2014 | 000-53557 | 
| 10-Q/A | Open Document | Open Filing | 10-Q/A | Mar 11, 2015 | Sep 30, 2014 | 000-53557 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 28, 2015 | Dec 28, 2014 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 27, 2015 | Jan 22, 2015 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 26, 2015 | Jan 22, 2015 | |
| SC 13G/A | Open Document | Open Filing | NONE | Jan 23, 2015 | 005-87100 | |
| 8-K | Open Document | Open Filing | 8-K | Jan 12, 2015 | Jan 9, 2015 | 000-53557 | 
| DEFA14A | Open Document | Open Filing | DEFA 14A | Jan 6, 2015 | 000-53557 | |
| DEF 14A | Open Document | Open Filing | DEF 14A | Dec 24, 2014 | Jan 5, 2015 | 000-53557 | 
| 10-Q | Open Document | Data | Open Filing | 10-Q | Dec 24, 2014 | Sep 30, 2014 | 000-53557 | 
| PRE 14A | Open Document | Open Filing | PRE 14A | Dec 5, 2014 | Dec 5, 2014 | 000-53557 | 
| NT 10-Q | Open Document | Open Filing | NT 10-Q | Nov 14, 2014 | Sep 30, 2014 | 000-53557 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 6, 2014 | Oct 25, 2014 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 5, 2014 | Oct 10, 2014 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 1, 2014 | Sep 25, 2014 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 1, 2014 | Sep 29, 2014 | |
| 10-Q | Open Document | Data | Open Filing | 10-Q | Aug 19, 2014 | Jun 30, 2014 | 000-53557 | 
| NT 10-Q | Open Document | Open Filing | NT 10-Q | Aug 13, 2014 | Jun 30, 2014 | 000-53557 | 
| 8-K | Open Document | Open Filing | 8-K | Jul 1, 2014 | Jun 25, 2014 | 000-53557 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 11, 2014 | Jun 6, 2014 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 11, 2014 | Jun 6, 2014 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 11, 2014 | Jun 6, 2014 | |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 3, 2014 | Dec 31, 2012 | |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 3, 2014 | Dec 31, 2012 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 2, 2014 | Dec 31, 2012 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 2, 2014 | Dec 31, 2012 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 2, 2014 | May 23, 2014 | |
| DEF 14A | Open Document | Open Filing | DEF 14A | May 20, 2014 | Jun 25, 2014 | 000-53557 | 
| 10-Q | Open Document | Data | Open Filing | 10-Q | May 20, 2014 | Mar 31, 2014 | 000-53557 | 
| NT 10-Q | Open Document | Open Filing | NT 10-Q | May 15, 2014 | Mar 31, 2014 | 000-53557 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 28, 2014 | Jan 30, 2014 | |
| 8-K | Open Document | Open Filing | 8-K | Apr 24, 2014 | Apr 24, 2014 | 000-53557 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 9, 2014 | Oct 28, 2013 | |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 9, 2014 | Nov 26, 2013 | |
| 10-K | Open Document | Data | Open Filing | 10-K | Mar 31, 2014 | Dec 31, 2013 | 000-53557 | 
| SC 13G | Open Document | Open Filing | NONE | Feb 28, 2014 | 005-87100 | |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 19, 2014 | Nov 26, 2013 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 12, 2014 | Jan 24, 2014 | |
| 8-K | Open Document | Open Filing | CLEAN COAL 8-K R PERDAMAIAN RESIGN | Jan 7, 2014 | Dec 31, 2013 | 000-53557 | 
| SC 13D | Open Document | Open Filing | SCHEDULE 13D | Jan 3, 2014 | 005-87100 | |
| SC 13D | Open Document | Open Filing | SCHEDULE 13D | Jan 3, 2014 | 005-87100 | |
| SC 13D/A | Open Document | Open Filing | SCHEDULE 13D/A | Jan 3, 2014 | 005-87100 | |
| 4 | Open Document | Open Filing | FORM 4 | Jan 3, 2014 | Dec 31, 2013 |