| Employee plan annual report | 11-K | 1997-06-30 | 1996-12-31 |
| Major company event | 8-K | 1997-06-27 | 1997-06-24 |
| Prospectus supplement | 424B2 | 1997-06-19 | - |
| Quarterly report | 10-Q | 1997-06-16 | 1997-05-02 |
| Prospectus supplement | 424B5 | 1997-06-11 | - |
| S-3/A | - | 1997-06-09 | - |
| Major company event (amended) | 8-K/A | 1997-06-06 | 1996-12-02 |
| S-3/A | - | 1997-05-12 | - |
| Quarterly report | 10-Q | 1997-03-17 | 1997-01-31 |
| Major company event (amended) | 8-K/A | 1997-02-18 | 1996-12-02 |
| Passive ownership stake (update) | SC 13G/A | 1997-02-14 | - |
| POS AM | - | 1997-02-13 | - |
| Passive ownership stake (update) | SC 13G/A | 1997-02-13 | - |
| Passive ownership stake | SC 13G | 1997-02-13 | - |
| Proxy statement | DEF 14A | 1997-02-11 | 1997-02-13 |
| POS AM | - | 1997-02-04 | - |
| Securities registration | S-3 | 1997-01-31 | - |
| Annual report | 10-K | 1997-01-29 | 1996-10-31 |
| Major company event | 8-K | 1996-12-16 | 1996-12-02 |
| Major company event | 8-K | 1996-10-17 | 1996-09-18 |
| Quarterly report | 10-Q | 1996-09-16 | 1996-08-02 |
| Quarterly report | 10-Q | 1996-06-17 | 1996-05-03 |
| Securities registration | S-3 | 1996-05-24 | - |
| S-3/A | - | 1996-05-22 | - |
| S-8 POS | - | 1996-05-22 | - |
| Employee stock plan | S-8 | 1996-05-10 | - |
| Employee stock plan | S-8 | 1996-05-10 | - |
| Passive ownership stake (update) | SC 13G/A | 1996-04-10 | - |
| Quarterly report | 10-Q | 1996-03-18 | 1996-02-02 |
| Passive ownership stake (update) | SC 13G/A | 1996-02-14 | - |
| Passive ownership stake | SC 13G | 1996-02-13 | - |
| Proxy statement | DEF 14A | 1996-02-05 | 1996-03-12 |
| Employee plan annual report | 11-K | 1996-01-26 | 1995-07-31 |
| Quarterly report | 10-Q | 1995-12-15 | 1995-10-31 |
| Annual report (amended) | 10-K/A | 1995-11-28 | 1995-07-31 |
| Major company event | 8-K | 1995-11-14 | 1995-11-02 |
| Annual report | 10-K | 1995-10-27 | 1995-07-31 |
| Securities registration | S-3 | 1995-09-19 | - |
| Quarterly report | 10-Q | 1995-06-09 | 1995-04-28 |
| Employee stock plan | S-8 | 1995-05-24 | - |
| Quarterly report | 10-Q | 1995-03-17 | 1995-02-03 |
| Passive ownership stake | SC 13G | 1995-02-08 | - |
| Employee plan annual report | 11-K | 1995-01-27 | 1994-07-31 |
| Quarterly report | 10-Q | 1994-12-09 | 1994-10-28 |
| Annual report (amended) | 10-K/A | 1994-12-06 | 1994-07-31 |
| Proxy statement | DEF 14A | 1994-11-02 | 1994-07-31 |
| Annual report | 10-K | 1994-10-28 | 1994-07-31 |
| Passive ownership stake (update) | SC 13G/A | 1994-09-22 | - |
| Passive ownership stake (update) | SC 13G/A | 1994-09-22 | - |
| Passive ownership stake (update) | SC 13G/A | 1994-09-22 | - |
