| Document and Entity Information | May 10, 2022 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001850902 |
| Document Type | 8-K |
| Document Period End Date | May 10, 2022 |
| Entity Registrant Name | ALPHA TEKNOVA, INC. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-40538 |
| 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 |
| Security 12b Title | Common Stock, par value $0.00001 per share |
| Trading Symbol | TKNO |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
