PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 49,150	$ 46,698
Less accumulated depreciation	(32,569)	(29,678)
Total property and equipment, net	16,581	17,020
Total costs transferred from inventory	1,800	4,100	$ 4,600
Depreciation and amortization	4,400	4,000	3,400
Capital expenditures	$ 3,417	3,773	2,337
Heska Imaging
Property, Plant and Equipment [Line Items]
Percentage of voting interest acquired	54.60%
Heska Imaging
Property, Plant and Equipment [Line Items]
Total property and equipment, net	$ 300	2,200
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	377	377
Building
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 2,868	2,868
Building | Minimum
Property, Plant and Equipment [Line Items]
Property plant and equipment, useful life	10 years
Building | Maximum
Property, Plant and Equipment [Line Items]
Property plant and equipment, useful life	20 years
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 36,588	35,284
Machinery and equipment | Minimum
Property, Plant and Equipment [Line Items]
Property plant and equipment, useful life	3 years
Machinery and equipment | Maximum
Property, Plant and Equipment [Line Items]
Property plant and equipment, useful life	15 years
Leasehold and building improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 7,662	6,673
Leasehold and building improvements | Minimum
Property, Plant and Equipment [Line Items]
Property plant and equipment, useful life	7 years
Leasehold and building improvements | Maximum
Property, Plant and Equipment [Line Items]
Property plant and equipment, useful life	15 years
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,655	1,496
Machinery and equipment | Minimum
Property, Plant and Equipment [Line Items]
Property plant and equipment, useful life	5 years
Machinery and equipment | Maximum
Property, Plant and Equipment [Line Items]
Property plant and equipment, useful life	7 years
Software and Software Development Costs
Property, Plant and Equipment [Line Items]
Total property and equipment, net	$ 400
Capital expenditures	$ 251	$ 51	$ 31