QUARTERLY FINANCIAL INFORMATION (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Notes to Financial Statements
Total revenue	$ 24,323	$ 21,805	$ 22,916	$ 20,793	$ 23,504	$ 17,595	$ 18,261	$ 18,979	$ 89,837	$ 78,339	$ 72,805
Gross profit	10,042	8,317	9,077	8,279	10,404	7,406	5,020	7,802	35,715	30,632	31,101
Operating income (loss)	1,754	341	917	(101)	2,755	75	(3,578)	(682)	2,911	(1,430)	2,158
Net income (loss)	1,079	15	778	(273)	1,898	(18)	(2,467)	(352)	1,599	(939)
Net income (loss) attributable to Heska Corporation	$ 829	$ 513	$ 1,069	$ 192	$ 1,177	$ 241	$ (2,228)	$ (386)	$ 2,603	$ (1,196)	$ 1,203
Basic net income (loss) per share attributable to Heska Corporation	$ 0.14	$ 0.09	$ 0.18	$ 0.03	$ 0.20	$ 0.04	$ (0.38)	$ (0.07)	$ 0.44	$ (0.21)	$ 0.23
Diluted net income (loss) per share attributable to Heska Corporation	$ 0.12	$ 0.08	$ 0.17	$ 0.03	$ 0.20	$ 0.04	$ (0.38)	$ (0.07)	$ 0.41	$ (0.21)