| Cover Page | Feb. 23, 2021 | May 21, 2020 |
| Cover [Abstract] | ||
| Document Type | 8-K | |
| Document Period End Date | Feb. 23, 2021 | |
| 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 |
