QUARTERLY FINANCIAL INFORMATION (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]
Total revenue	$ 29,759	$ 28,034	$ 23,910	$ 22,894	$ 24,323	$ 21,805	$ 22,916	$ 20,793	$ 104,597	$ 89,837	$ 78,339
Gross profit	12,235	11,597	10,297	10,084	10,042	8,317	9,077	8,279	44,213	35,715	30,632
Operating income (loss)	3,565	2,142	1,829	1,021	1,754	341	917	(101)	8,557	2,911	(1,430)
Net income (loss)	2,375	1,383	1,178	583	1,079	15	778	(273)	5,519	1,599
Net income (loss) attributable to Heska Corporation	$ 2,029	$ 1,415	$ 1,197	$ 598	$ 829	$ 513	$ 1,069	$ 192	$ 5,239	$ 2,603	$ (1,196)
Basic earnings (loss) per share attributable to Heska Corporation, in dollars per share	$ 0.29	$ 0.22	$ 0.19	$ 0.10	$ 0.14	$ 0.09	$ 0.18	$ 0.03	$ 0.80	$ 0.44	$ (0.21)
Diluted earnings per share attributable to Heska Corporation	$ 0.28	$ 0.20	$ 0.17	$ 0.09	$ 0.13	$ 0.08	$ 0.17	$ 0.03	$ 0.74	$ 0.41