| Form type | Sec Links | Description | Filing date | Reporting date |
|---|---|---|---|---|
| 8-K | Report | Data | Sep 21, 2021 | Sep 21, 2021 | |
| SC 13D | Report | Jul 12, 2021 | ||
| SC 13D | Report | Jun 21, 2021 | ||
| SC 13D | Report | Mar 10, 2021 | ||
| SC 13D | Report | Dec 9, 2019 | ||
| SC 13D | Report | Aug 29, 2018 | ||
| 8-K | Report | CURRENT REPORT ON FORM 8-K | Apr 18, 2011 | Apr 6, 2011 |
| 8-K | Report | AMERICAN ENVIRONMENTAL 8-K | Apr 14, 2011 | Apr 4, 2011 |
| 8-K | Report | CURRENT REPORT ON FORM 8-K | Jul 20, 2010 | Jul 19, 2010 |
| 10-Q | Report | 10-Q | Nov 15, 1999 | Sep 30, 1999 |
| 10-K | Report | Sep 21, 1998 | Dec 31, 1996 |