ACQUISITION AND RELATED PARTY ITEMS - ACQUISITION INFORMATION (Details) - USD ($) $ / shares in Units, $ in Thousands			12 Months Ended
	Apr. 03, 2017	May 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Feb. 24, 2013
Business Acquisition [Line Items]
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Declared	$ 1,000		$ 100
Common stock, par value (in dollars per share)				$ 0.01
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest [Abstract]
Goodwill			26,687	$ 26,647	$ 20,910
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill [Abstract]
Interest subject to purchase as a percent						45.40%
Heska Imaging
Business Acquisition [Line Items]
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Declared	$ 2,100		$ 300
Chief Executive Officer | Kevin S. Willson, Shawna M. Wilson And Trusts For Their Children And Family | Cuattro, LLC
Business Acquisition [Line Items]
Ownership percentage by trusts				100.00%
Chief Executive Officer | Kevin S. Willson, Shawna M. Wilson And Trusts For Their Children And Family | Cuattro Software, LLC
Business Acquisition [Line Items]
Ownership percentage by trusts				100.00%
Heska Imaging
Business Acquisition [Line Items]
Shares issued as consideration		175,000
Shares issued as consideration, value		$ 6,300
Share sale restriction period following merger date		180 days
Debt assumed in acquisition		$ 1,535
Business Combination, Consideration Transferred, Including Equity Interest in Acquiree Held Prior to Combination [Abstract]
Stock		6,347
Debt assumed		1,535
Total fair value of consideration transferred		7,882
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest [Abstract]
Accounts receivable		222
Inventories		39
Due from Cuattro, LLC		963
Property and equipment		80
Other tangible assets		164
Deferred tax asset		56
Intangible assets		2,521
Goodwill		5,783
Accounts payable		(112)
Deferred tax liability		(905)
Other assumed liabilities		(929)
Total fair value of consideration transferred		$ 7,882
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill [Abstract]
Percentage of voting interest acquired				54.60%
Heska Imaging | Customer Relationships
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill [Abstract]
Useful Life		6 years 7 months 31 days
Fair Value		$ 2,521