| Cover Page | May 21, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Aug. 4, 2020 |
| Entity Registrant Name | HESKA CORPORATION |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 000-22427 |
| Entity Tax Identification Number | 77-0192527 |
| Entity Address, Address Line One | 3760 Rocky Mountain Avenue |
| Entity Address, City or Town | Loveland |
| Entity Address, State or Province | CO |
| Entity Address, Postal Zip Code | 80538 |
| City Area Code | 970 |
| Local Phone Number | 493-7272 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common stock, $0.01 par value |
| Trading Symbol | HSKA |
| Security Exchange Name | NASDAQ |
| Entity Central Index Key | 0001038133 |
| Amendment Flag | false |
| Entity Emerging Growth Company | false |
