FILINGS
| AMPH 0001297184 | |||
|---|---|---|---|
| Filing Date | Form Type | Description | Document |
| 2021-06-08 | 4 | OWNERSHIP DOCUMENT | View Document |
| 2021-06-08 | 8-K | 8-K | View Document |
| 2021-06-04 | 4 | OWNERSHIP DOCUMENT | View Document |
| 2021-06-02 | 4 | OWNERSHIP DOCUMENT | View Document |
| 2021-05-24 | 4 | OWNERSHIP DOCUMENT | View Document |
| 2021-05-20 | 4 | OWNERSHIP DOCUMENT | View Document |
| 2021-05-18 | 4 | OWNERSHIP DOCUMENT | View Document |
| 2021-05-17 | 4 | OWNERSHIP DOCUMENT | View Document |
| 2021-05-14 | 4 | OWNERSHIP DOCUMENT | View Document |
| 2021-05-13 | 4 | OWNERSHIP DOCUMENT | View Document |
| 2021-05-13 | 4 | OWNERSHIP DOCUMENT | View Document |
| 2021-05-07 | DEFA14A | DEFA14A | View Document |
| 2021-05-07 | 10-Q | 10-Q | View Document |
| 2021-05-07 | 8-K | 8-K | View Document |
| 2021-05-06 | 8-K | 8-K | View Document |
| 2021-04-14 | DEFA14A | DEFA14A | View Document |
| 2021-04-14 | DEF 14A | DEF 14A | View Document |
| 2021-03-18 | 4 | OWNERSHIP DOCUMENT | View Document |
| 2021-03-18 | 4 | OWNERSHIP DOCUMENT | View Document |
| 2021-03-18 | 4 | OWNERSHIP DOCUMENT | View Document |
| 2021-03-18 | 4 | OWNERSHIP DOCUMENT | View Document |
| 2021-03-17 | 4 | OWNERSHIP DOCUMENT | View Document |
| 2021-03-17 | 4 | OWNERSHIP DOCUMENT | View Document |
| 2021-03-17 | 4 | OWNERSHIP DOCUMENT | View Document |
| 2021-03-17 | 4 | OWNERSHIP DOCUMENT | View Document |
| 2021-03-15 | S-8 | S-8 | View Document |
| 2021-03-15 | 10-K | 10-K | View Document |
| 2021-03-15 | 8-K | 8-K | View Document |
| 2021-02-18 | 4 | 4 | View Document |
| 2021-02-12 | 4 | 4 | View Document |
| 2021-02-12 | SC 13G/A | SC 13G/A | View Document |
| 2021-02-12 | SC 13G | View Document | |
| 2021-02-10 | SC 13G/A | SCHEDULE 13G/A | View Document |
| 2021-02-09 | 4 | 4 | View Document |
| 2021-02-05 | 4 | 4 | View Document |
| 2021-02-03 | 4 | 4 | View Document |
| 2021-02-02 | 4 | 4 | View Document |
| 2021-01-26 | SC 13G/A | View Document | |
| 2021-01-20 | 4 | 4 | View Document |
| 2021-01-12 | 8-K | 8-K | View Document |
| 2020-12-02 | 4 | 4 | View Document |
| 2020-11-06 | 8-K | 8-K | View Document |
| 2020-11-06 | 10-Q | 10-Q | View Document |
| 2020-11-06 | 8-K | 8-K | View Document |
| 2020-11-03 | 4 | 4 | View Document |
| 2020-10-02 | 4 | 4 | View Document |
| 2020-09-02 | 4 | 4 | View Document |
| 2020-08-18 | 4 | 4 | View Document |
| 2020-08-18 | 4 | 4 | View Document |
| 2020-08-12 | 4 | 4 | View Document |
| 2020-08-10 | 8-K/A | 8-K/A | View Document |
| 2020-08-07 | 10-Q | 10-Q | View Document |
| 2020-08-06 | 8-K | 8-K | View Document |
| 2020-08-04 | 4 | 4 | View Document |
| 2020-07-22 | 4 | 4 | View Document |
| 2020-07-08 | 4 | 4 | View Document |
| 2020-07-02 | 4 | 4 | View Document |
| 2020-06-15 | 4 | 4 | View Document |
| 2020-06-15 | 4 | 4 | View Document |
| 2020-06-10 | 4 | 4 | View Document |
| 2020-06-09 | 4 | 4 | View Document |
| 2020-06-09 | 4 | 4 | View Document |
| 2020-06-09 | 4 | 4 | View Document |
| 2020-06-09 | 4 | 4 | View Document |
| 2020-06-09 | 4 | 4 | View Document |
| 2020-06-09 | 4 | 4 | View Document |
| 2020-06-09 | 4 | 4 | View Document |
| 2020-06-09 | 3 | 3 | View Document |
| 2020-06-09 | 8-K | 8-K | View Document |
| 2020-06-08 | 4 | 4 | View Document |
| 2020-06-05 | 4 | 4 | View Document |
| 2020-06-02 | 4 | 4 | View Document |
| 2020-05-28 | 4 | 4 | View Document |
| 2020-05-27 | 4 | 4 | View Document |
| 2020-05-22 | 4 | 4 | View Document |
| 2020-05-18 | 4 | 4 | View Document |
| 2020-05-18 | 4 | 4 | View Document |
| 2020-05-14 | 4 | 4 | View Document |
| 2020-05-14 | 4 | 4 | View Document |
| 2020-05-14 | 4 | 4 | View Document |
| 2020-05-11 | 10-Q | 10-Q | View Document |
| 2020-05-07 | 8-K | 8-K | View Document |
| 2020-05-05 | 4 | 4 | View Document |
| 2020-04-15 | DEFA14A | DEFA14A | View Document |
| 2020-04-15 | DEF 14A | DEF 14A | View Document |
| 2020-04-14 | 8-K/A | 8-K/A | View Document |
| 2020-04-13 | 8-K | 8-K | View Document |
| 2020-04-02 | 4 | 4 | View Document |
| 2020-03-18 | 4 | 4 | View Document |
| 2020-03-18 | 4 | 4 | View Document |
| 2020-03-18 | 4 | 4 | View Document |
| 2020-03-18 | 4 | 4 | View Document |
| 2020-03-18 | 4 | 4 | View Document |
| 2020-03-17 | 4 | 4 | View Document |
| 2020-03-17 | 4 | 4 | View Document |
| 2020-03-17 | 4 | 4 | View Document |
| 2020-03-17 | 4 | 4 | View Document |
| 2020-03-17 | 4 | 4 | View Document |
| 2020-03-16 | S-8 | S-8 | View Document |
| 2020-03-16 | 10-K | 10-K | View Document |
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