| S-4/A | - | 1997-12-03 | - |
| Quarterly report | 10-Q | 1997-11-07 | 1997-11-07 |
| Employee stock plan | S-8 | 1997-11-05 | - |
| Activist ownership stake (update) | SC 13D/A | 1997-11-05 | - |
| S-4 | - | 1997-10-17 | - |
| Annual report (amended) | 10-K/A | 1997-10-01 | 1997-09-30 |
| Annual report | 10-K | 1997-09-29 | 1997-06-30 |
| Proxy statement | DEF 14A | 1997-09-17 | 1997-09-17 |
| Activist ownership stake (update) | SC 13D/A | 1997-09-17 | - |
| Activist ownership stake | SC 13D | 1997-08-15 | - |
| Activist ownership stake (update) | SC 13D/A | 1997-08-15 | - |
| Activist ownership stake (update) | SC 13D/A | 1997-08-15 | - |
| Activist ownership stake (update) | SC 13D/A | 1997-08-12 | - |
| Activist ownership stake (update) | SC 13D/A | 1997-08-11 | - |
| Activist ownership stake (update) | SC 13D/A | 1997-08-11 | - |
| S-3/A | - | 1997-07-30 | - |
| Securities registration | S-3 | 1997-07-18 | - |
| Securities registration | S-3 | 1997-06-26 | - |
| Employee plan annual report | 11-K | 1997-06-26 | 1996-12-31 |
| Employee plan annual report | 11-K | 1997-06-26 | 1996-12-31 |
| Quarterly report | 10-Q | 1997-05-15 | 1997-04-15 |
| S-3/A | - | 1997-03-31 | - |
| S-3/A | - | 1997-03-20 | - |
| Prospectus supplement | 424B2 | 1997-03-17 | - |
| Quarterly report | 10-Q | 1997-02-13 | 1997-02-13 |
| Quarterly report | 10-Q | 1996-11-14 | 1996-11-13 |
| S-3/A | - | 1996-11-12 | - |
| DEFR14A | - | 1996-10-11 | - |
| Proxy materials | DEFA14A | 1996-10-07 | - |
| Securities registration | S-3 | 1996-10-01 | - |
| Annual report | 10-K | 1996-09-30 | 1996-06-30 |
| Proxy statement | DEF 14A | 1996-09-25 | 1996-09-04 |
| PRE 14A | - | 1996-09-16 | 1996-09-16 |
| Employee plan annual report | 11-K | 1996-06-26 | 1995-12-31 |
| Employee plan annual report | 11-K | 1996-06-26 | 1995-12-31 |
| Quarterly report | 10-Q | 1996-05-15 | 1996-05-15 |
| Major company event | 8-K | 1996-04-16 | 1996-04-16 |
| Quarterly report | 10-Q | 1996-02-13 | 1996-02-09 |
| Quarterly report | 10-Q | 1995-11-14 | 1995-09-30 |
| Proxy statement | DEF 14A | 1995-09-13 | 1995-09-13 |
| Annual report (amended) | 10-K/A | 1995-08-22 | 1995-06-30 |
| Annual report | 10-K | 1995-08-17 | 1995-06-30 |
| Major company event (amended) | 8-K/A | 1995-07-27 | 1995-07-26 |
| Major company event (amended) | 8-K/A | 1995-07-27 | 1995-07-26 |
| Major company event | 8-K | 1995-07-21 | 1995-07-20 |
| Major company event | 8-K | 1995-07-03 | 1995-06-30 |
| Employee plan annual report | 11-K | 1995-06-22 | 1994-12-31 |
| Employee plan annual report | 11-K | 1995-06-22 | 1994-12-31 |
| Quarterly report | 10-Q | 1995-05-12 | 1995-03-31 |
| Employee stock plan | S-8 | 1995-04-03 | - |
