| Cover | Jun. 19, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jun. 19, 2023 |
| Current Fiscal Year End Date | --04-30 |
| Entity File Number | 001-32839 |
| Entity Registrant Name | AVID BIOSERVICES, INC. |
| Entity Central Index Key | 0000704562 |
| Entity Tax Identification Number | 95-3698422 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 14191 Myford Road |
| Entity Address, City or Town | Tustin |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 92780 |
| City Area Code | (714) |
| Local Phone Number | 508-6100 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.001 par value per share |
| Trading Symbol | CDMO |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
