| Cover Page | May 05, 2020 | Apr. 13, 2020 |
| Cover [Abstract] | ||
| Document Type | 8-K | |
| Document Period End Date | Apr. 12, 2021 | |
| Entity Registrant Name | VERACYTE, INC. | |
| 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 | |
| Entity Address, Address Line Two | 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, par value, $0.001 per share | |
| Trading Symbol | VCYT | |
| Security Exchange Name | NASDAQ | |
| Entity Emerging Growth Company | false | |
| Amendment Flag | false | |
| Entity Central Index Key | 0001384101 |
