ACQUISITION AND RELATED PARTY ITEMS - RELATED PARTY ITEMS (Details) - USD ($) $ in Thousands		5 Months Ended	12 Months Ended
	Apr. 03, 2017	May 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Jun. 01, 2017
Related Party Transaction [Line Items]
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Declared	$ 1,000		$ 100
Due from – related parties			1	$ 100
Affiliated Entity | Cuattro, LLC
Related Party Transaction [Line Items]
Related party - amount of transaction			100	200	$ 200
Affiliated Entity | Heska Imaging
Related Party Transaction [Line Items]
Related party - amount of transaction		$ 2,900		5,300	4,900
Affiliated Entity | U.S. Imaging
Related Party Transaction [Line Items]
Note receivable – related party				$ 5,600
Heska Imaging
Related Party Transaction [Line Items]
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Declared	$ 2,100		300
Heska Imaging | Immediate Family Member of Management or Principal Owner | Shawna M. Wilson
Related Party Transaction [Line Items]
Ownership percentage				29.75%
Heska Imaging | Executive Officer | Clint Roth
Related Party Transaction [Line Items]
Ownership percentage				8.39%
Heska Imaging | Executive Officer | Steven M. Asakowicz
Related Party Transaction [Line Items]
Ownership percentage				4.09%
Heska Imaging | Executive Officer | Rodney A. Lippincott
Related Party Transaction [Line Items]
Ownership percentage				3.07%
Heska Imaging | Chief Executive Officer | Kevin S. Wilson
Related Party Transaction [Line Items]
Ownership percentage				0.05%
Heska Imaging | Affiliated Entity
Related Party Transaction [Line Items]
Due to Related Parties			1,700
Heska Imaging | Affiliated Entity | Cuattro, LLC
Related Party Transaction [Line Items]
Ownership percentage				0.05%
Related party - amount of transaction			17,700	$ 14,500	$ 9,000
Heska Corporation | Cuattro, LLC
Related Party Transaction [Line Items]
Related parties, accounts payable, current			1	22
International Imaging | Affiliated Entity | Cuattro, LLC
Related Party Transaction [Line Items]
Due from – related parties			0	78
Global Imaging | Affiliated Entity
Related Party Transaction [Line Items]
Due to Related Parties			$ 1,600
Global Imaging | Affiliated Entity | Heska Imaging
Related Party Transaction [Line Items]
Due from – related parties				1,200
U.S. Imaging | Affiliated Entity | International Imaging
Related Party Transaction [Line Items]
Note receivable – related party				$ 1,600		$ 300