| Document and Entity Information - shares | 3 Months Ended | |
| Mar. 31, 2018 | May 08, 2018 | |
| Document And Entity Information | ||
| Entity Registrant Name | Heska Corp | |
| Entity Central Index Key | 1,038,133 | |
| Document Type | 10-Q | |
| Document Period End Date | Mar. 31, 2018 | |
| Amendment Flag | false | |
| Current Fiscal Year End Date | --12-31 | |
| Entity Well-known Seasoned Issuer | No | |
| Entity Voluntary Filers | No | |
| Entity Current Reporting Status | Yes | |
| Entity Filer Category | Accelerated Filer | |
| Document Fiscal Period Focus | Q1 | |
| Document Fiscal Year Focus | 2,018 | |
| Entity Common Stock, Shares Outstanding | 7,458,860 |
