| Document And Entity Information | Nov. 02, 2020 |
| Document Information [Line Items] | |
| Entity, Registrant Name | VERACYTE, INC. |
| Document, Type | 8-K |
| Document, Period End Date | Nov. 2, 2020 |
| Entity, Incorporation, State or Country Code | DE |
| Entity, File Number | 001-36156 |
| Entity, Tax Identification Number | 20-5455398 |
| Entity, Address, Address Line One | 6000 Shoreline Court, Suite 300 |
| Entity, Address, City or Town | South San Francisco |
| Entity, Address, State or Province | CA |
| Entity, Address, Postal Zip Code | 94080 |
| City Area Code | 650 |
| Local Phone Number | 243-6300 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | VCYT |
| Security Exchange Name | NASDAQ |
| Entity, Emerging Growth Company | false |
| Amendment Flag | false |
| Entity, Central Index Key | 0001384101 |
