| Passive ownership stake (update) | SC 13G/A | 2001-10-05 | - |
| Major company event (amended) | 8-K/A | 2001-10-02 | 2001-09-17 |
| Major company event (amended) | 8-K/A | 2001-10-01 | 2001-09-17 |
| New insider ownership | 3 | 2001-09-27 | 2001-09-17 |
| Passive ownership stake | SC 13G | 2001-09-27 | - |
| 8-A12G/A | - | 2001-09-21 | - |
| Major company event | 8-K | 2001-09-21 | 2001-09-06 |
| Employee stock plan | S-8 | 2001-09-18 | - |
| Major company event | 8-K | 2001-09-14 | 2001-09-06 |
| Quarterly report | 10-Q | 2001-08-08 | 2001-06-30 |
| Employee stock plan | S-8 | 2001-08-02 | - |
| Quarterly report | 10-Q | 2001-05-09 | 2001-03-31 |
| Proxy statement | DEF 14A | 2001-04-16 | 2001-05-11 |
| 8-A12G | - | 2001-03-15 | - |
| Major company event | 8-K | 2001-03-15 | 2001-03-15 |
| Annual report | 10-K | 2001-03-14 | 2000-12-31 |
| Major company event (amended) | 8-K/A | 2001-03-12 | 2001-03-09 |
| Major company event | 8-K | 2001-02-16 | 2001-02-16 |
| Passive ownership stake (update) | SC 13G/A | 2001-02-13 | - |
| Passive ownership stake | SC 13G | 2001-02-12 | - |
| Passive ownership stake (update) | SC 13G/A | 2001-02-01 | - |
| Employee stock plan | S-8 | 2000-11-07 | - |
| Quarterly report | 10-Q | 2000-11-02 | 2000-09-30 |
| Passive ownership stake | SC 13G | 2000-10-10 | - |
| Activist ownership stake (update) | SC 13D/A | 2000-09-11 | - |
| Quarterly report | 10-Q | 2000-08-14 | 2000-06-30 |
| Employee stock plan | S-8 | 2000-06-13 | - |
| Activist ownership stake | SC 13D | 2000-05-15 | - |
| Major company event | 8-K | 2000-05-12 | 2000-05-05 |
| Quarterly report | 10-Q | 2000-05-11 | 2000-03-31 |
| Major company event | 8-K | 2000-05-09 | 2000-04-28 |
| Employee stock plan | S-8 | 2000-05-05 | - |
| Proxy statement | DEF 14A | 2000-04-13 | 2000-05-12 |
| S-4/A | - | 2000-04-04 | - |
| Annual report (amended) | 10-K/A | 2000-04-04 | 1999-12-31 |
| S-4 | - | 2000-03-15 | - |
| 10-K405 | - | 2000-03-15 | 1999-12-31 |
| Major company event | 8-K | 2000-03-13 | 2000-02-29 |
| Activist ownership stake | SC 13D | 2000-03-10 | - |
| 425 | - | 2000-02-29 | - |
| Activist ownership stake (update) | SC 13D/A | 2000-02-11 | - |
| Major company event (amended) | 8-K/A | 2000-01-12 | 1999-11-04 |
| Activist ownership stake (update) | SC 13D/A | 2000-01-05 | - |
| Activist ownership stake (update) | SC 13D/A | 1999-12-16 | - |
| Major company event | 8-K | 1999-11-17 | 1999-11-04 |
| Quarterly report | 10-Q | 1999-11-15 | 1999-09-30 |
| Passive ownership stake (update) | SC 13G/A | 1999-11-08 | - |
| Activist ownership stake (update) | SC 13D/A | 1999-10-29 | - |
| Passive ownership stake (update) | SC 13G/A | 1999-10-07 | - |
| Passive ownership stake (update) | SC 13G/A | 1999-10-07 | - |
