| Document And Entity Information | May 11, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | May 11, 2022 |
| Entity Registrant Name | ALPHA TEKNOVA, INC. |
| Entity Central Index Key | 0001850902 |
| Entity Emerging Growth Company | false |
| Entity File Number | 001-40538 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 94-3368109 |
| Entity Address, Address Line One | 2451 Bert Drive |
| Entity Address, City or Town | Hollister |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 95023 |
| City Area Code | 831 |
| Local Phone Number | 637-1100 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.00001 per share |
| Trading Symbol | TKNO |
| Security Exchange Name | NASDAQ |
