PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 49,927		$ 49,150
Less accumulated depreciation	(33,569)		(32,569)
Total property and equipment, net	16,358		16,581
Total costs transferred from inventory	100		1,800
Depreciation and amortization	1,000	$ 1,100
Heska Imaging
Property, Plant and Equipment [Line Items]
Total property and equipment, net	$ 300		300
Cuattro Veterinary USA, LLC
Property, Plant and Equipment [Line Items]
Percentage of voting interest acquired	54.60%
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
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	37,403		36,588
Leasehold and building improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	7,794		7,662
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,485		$ 1,655
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